Remove legacy examples

Signed-off-by: Nathaniel Graff <nathaniel.graff@sifive.com>

48 files changed, 0 insertions, 3947 deletions

diff --git a/software/asm_main/Makefile b/software/asm_main/Makefile
deleted file mode 100644
index 40c1175..0000000
--- a/software/asm_main/Makefile
+++ /dev/null
@@ -1,6 +0,0 @@
-TARGET = asm_main
-ASM_SRCS += asm_main.S
-CFLAGS += -O2 -DNO_INIT
-
-BSP_BASE = ../../bsp
-include $(BSP_BASE)/env/common.mk
diff --git a/software/asm_main/asm_main.S b/software/asm_main/asm_main.S
deleted file mode 100644
index 6241bb1..0000000
--- a/software/asm_main/asm_main.S
+++ /dev/null
@@ -1,8 +0,0 @@
-	.section .text
-	.globl main
-
-
-main: 
-    add t0,zero,zero
-1:  addi t0,t0, 1
-    j 1b
diff --git a/software/clic_vectored/Makefile b/software/clic_vectored/Makefile
deleted file mode 100644
index d6e2342..0000000
--- a/software/clic_vectored/Makefile
+++ /dev/null
@@ -1,10 +0,0 @@
-TARGET = clic_vectored
-CFLAGS += -Og -fno-builtin-printf
-
-BSP_BASE = ../../bsp
-
-C_SRCS += clic_vectored.c
-
-C_SRCS += $(BSP_BASE)/drivers/clic/clic_driver.c
-
-include $(BSP_BASE)/env/common.mk
diff --git a/software/clic_vectored/clic_vectored.c b/software/clic_vectored/clic_vectored.c
deleted file mode 100644
index 37ea723..0000000
--- a/software/clic_vectored/clic_vectored.c
+++ /dev/null
@@ -1,197 +0,0 @@
-// See LICENSE for license details.
-#include <stdio.h>
-#include <stdlib.h>
-#include "platform.h"
-#include <string.h>
-#include "encoding.h"
-#include <unistd.h>
-#include "sifive/devices/clic.h"
-#include "clic/clic_driver.h"
-#include "sifive/devices/clint.h"
-
-#ifndef _SIFIVE_COREPLEXIP_ARTY_H
-#error 'local_interrupts' demo only supported for Core IP Eval Kits
-#endif
-
-// Global Variable used to show
-// software interrupts.
-volatile uint32_t g_debouncing;
-
-// vector table defined in init.c
-typedef void (*interrupt_function_ptr_t) (void);
-extern interrupt_function_ptr_t localISR[CLIC_NUM_INTERRUPTS]; 
-extern void default_handler(void);
-
-//clic data structure
-clic_instance_t clic;
-
-const char * instructions_msg = " \
-\n\
-              SiFive, Inc\n\
-\n\
-         5555555555555555555555555\n\
-        5555                   5555\n\
-       5555                     5555\n\
-      5555                       5555\n\
-     5555       5555555555555555555555\n\
-    5555       555555555555555555555555\n\
-   5555                             5555\n\
-  5555                               5555\n\
- 5555                                 5555\n\
-5555555555555555555555555555          55555\n\
- 55555           555555555           55555\n\
-   55555           55555           55555\n\
-     55555           5           55555\n\
-       55555                   55555\n\
-         55555               55555\n\
-           55555           55555\n\
-             55555       55555\n\
-               55555   55555\n\
-                 555555555\n\
-                   55555\n\
-                     5\n\
-\n\
-E2 Core IP Eval Kit 'clic_vectored' demo.\n\
-This demo uses buttons 0, 1, and 2 on the\n\
-Arty board to trigger vectored clic interrupts.\n\
-The higher the button number, the higher the\n\
-interupt priority. Button 0's handler runs for\n\
-10 seconds, button 1's for 5, and button 2's for 1.\n\
-Preemption is enabled so that higher priority\n\
-interrupts can be triggered while in low priority\n\
-handlers. The demo also uses the CLIC's software\n\
-interrupt to pend a lower priority interrupt from\n\
-button 2's handler.\n\
-\n\
-Note the buttons are wired directly into the local\n\
-interrupts, so a given interrupt will stay asserted\n\
-as long as the button is being pushed.\n\
-\n\
-This demo works for both the E20 and E21 FPGA\n\
-as long as CLIC_CONFIG_BITS matches the desired\n\
-core.\n\
-\n";
-
-void print_instructions() {
-  write (STDERR_FILENO, instructions_msg, strlen(instructions_msg));
-}
-
-
-//busy wait for the specified time
-void wait_ms(uint64_t ms) {
-  static const uint64_t ms_tick = RTC_FREQ/1000;
-  volatile uint64_t * mtime  = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME);
-  uint64_t then = (ms_tick * ms) + *mtime;
-  while(*mtime<then);
-}
-
-void button_0_isr(void) __attribute__((interrupt("SiFive-CLIC-preemptible")));
-void button_0_isr(void) {
-  // Toggle Red LED
-  uint8_t level = clic_get_int_level(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_0));
-  printf("Button 0 was pressed, interrupt level %d. Toggle Red.\n", level);
-  GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << RED_LED_OFFSET);
-  wait_ms(10000);
-  GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << RED_LED_OFFSET);
-}
-
-void button_0_setup(void) {
-  clic_install_handler(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_0), button_0_isr);
-  clic_set_int_level(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_0), 1);
-  clic_enable_interrupt(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_0));
-}
-
-void button_1_isr(void) __attribute__((interrupt("SiFive-CLIC-preemptible")));
-void button_1_isr(void) {
-  // Toggle Red LED
-  uint8_t level = clic_get_int_level(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_1));
-  printf("Button 1 was pressed, interrupt level %d. Toggle Blue.\n", level);
-  GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << BLUE_LED_OFFSET);
-  wait_ms(5000);
-  GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << BLUE_LED_OFFSET);
-}
-
-void button_1_setup(void) {
-  clic_install_handler(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_1), button_1_isr);
-  clic_set_int_level(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_1), 2);
-  clic_enable_interrupt(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_1));
-}
-
-void button_2_isr(void) __attribute__((interrupt("SiFive-CLIC-preemptible")));
-void button_2_isr(void) {
-  // Toggle Red LED
-  uint8_t level = clic_get_int_level(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_2));
-  printf("Button 2 was pressed, interrupt level %d. Pending CSIPID and toggle Green.\n", level);
-  GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << GREEN_LED_OFFSET);
-  //pend a software interrupt
-  clic_set_pending(&clic, CSIPID);
-  wait_ms(1000);
-  GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << GREEN_LED_OFFSET);
-}
-
-void button_2_setup(void) {
-  clic_install_handler(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_2), button_2_isr);
-  clic_set_int_level(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_2), 3);
-  clic_enable_interrupt(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_2));
-}
-
-/*Entry Point for Machine Software Interrupt Handler*/
-uint32_t COUNT;
-void csip_isr()__attribute((interrupt));
-void csip_isr() {
-  //clear the  SW interrupt
-  CLIC0_REG8(CLIC_INTIP + CSIPID) = 0;
-  COUNT++;
-}
-
-void csip_setup(void)  {
-  clic_install_handler(&clic, CSIPID, csip_isr);
-  clic_set_int_level(&clic, CSIPID, 1);
-  clic_enable_interrupt(&clic, CSIPID);
-}
-
-void config_gpio()  {
-  // Configure LEDs as outputs.
-  GPIO_REG(GPIO_INPUT_EN)    &= ~((0x1<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET) | (0x1 << BLUE_LED_OFFSET)) ;
-  GPIO_REG(GPIO_OUTPUT_EN)   |=  ((0x1<< RED_LED_OFFSET)| (0x1<< GREEN_LED_OFFSET) | (0x1 << BLUE_LED_OFFSET)) ;
-  GPIO_REG(GPIO_OUTPUT_VAL)  &= ((0x1<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET)|  (0x1 << BLUE_LED_OFFSET)) ;
-}
-
-int main(int argc, char **argv)
-{
-  clear_csr(mstatus, MSTATUS_MIE);
-  clear_csr(mie, IRQ_M_SOFT);
-  clear_csr(mie, IRQ_M_TIMER);
-
-  //initialize clic registers and vector table
-  clic_init(&clic, CLIC_HART0_ADDR, 
-            (interrupt_function_ptr_t*)localISR,
-            default_handler,
-            CLIC_NUM_INTERRUPTS,
-            CLIC_CONFIG_BITS);
-
-  //use all 4 config bits for levels, no shv
-  clic_set_cliccfg(&clic, (CLIC_CONFIG_BITS<<1));
-
-  //initialize gpio and buttons.
-  //each button registers an interrupt handler
-  config_gpio();
-  button_0_setup();
-  button_1_setup();
-  button_2_setup();
-  csip_setup();
-
-  // Enable all global interrupts
-  set_csr(mstatus, MSTATUS_MIE);
-  print_instructions();
-
-   while(1)  {
-    wait_ms(10000);
-    printf("Count=%d\n", COUNT);
-    //Trigger a SW interrupt
-    clic_set_pending(&clic, CSIPID);
-  }
-
-  return 0;
-
-}
diff --git a/software/coremark/.gitignore b/software/coremark/.gitignore
deleted file mode 100644
index 6bd8438..0000000
--- a/software/coremark/.gitignore
+++ /dev/null
@@ -1,9 +0,0 @@
-/*.o
-/coremark
-/core_list_join.c
-/core_main.c
-/coremark.h
-/core_matrix.c
-/core_state.c
-/core_util.c
-/trans.c
diff --git a/software/coremark/.unsupported-boards b/software/coremark/.unsupported-boards
deleted file mode 100644
index 9221334..0000000
--- a/software/coremark/.unsupported-boards
+++ /dev/null
@@ -1,6 +0,0 @@
-# We don't deliver the full coremark sources for license reasons, so this can't
-# run in regression.
-freedom-e300-hifive1
-freedom-e300-arty
-coreplexip-e31-arty
-coreplexip-e51-arty
diff --git a/software/coremark/Makefile b/software/coremark/Makefile
deleted file mode 100644
index b57151e..0000000
--- a/software/coremark/Makefile
+++ /dev/null
@@ -1,20 +0,0 @@
-TARGET := coremark
-
-C_SRCS := \
-	core_list_join.c \
-	core_main.c \
-	core_matrix.c \
-	core_state.c \
-	core_util.c \
-	core_portme.c \
-
-HEADERS := \
-	coremark.h \
-	core_portme.h \
-
-CFLAGS := -O2 -fno-common -funroll-loops -finline-functions --param max-inline-insns-auto=20 -falign-functions=4 -falign-jumps=4 -falign-loops=4
-CFLAGS += -DFLAGS_STR=\""$(CFLAGS)"\"
-CFLAGS += -DITERATIONS=10000 -DPERFORMANCE_RUN=1
-
-BSP_BASE = ../../bsp
-include $(BSP_BASE)/env/common.mk
diff --git a/software/coremark/core_portme.c b/software/coremark/core_portme.c
deleted file mode 100644
index cbf1396..0000000
--- a/software/coremark/core_portme.c
+++ /dev/null
@@ -1,52 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include "coremark.h"
-#include "platform.h"
-#include "encoding.h"
-
-#if VALIDATION_RUN
-	volatile ee_s32 seed1_volatile=0x3415;
-	volatile ee_s32 seed2_volatile=0x3415;
-	volatile ee_s32 seed3_volatile=0x66;
-#endif
-
-#if PERFORMANCE_RUN
-	volatile ee_s32 seed1_volatile=0x0;
-	volatile ee_s32 seed2_volatile=0x0;
-	volatile ee_s32 seed3_volatile=0x66;
-#endif
-
-#if PROFILE_RUN
-	volatile ee_s32 seed1_volatile=0x8;
-	volatile ee_s32 seed2_volatile=0x8;
-	volatile ee_s32 seed3_volatile=0x8;
-#endif
-
-volatile ee_s32 seed4_volatile=ITERATIONS;
-volatile ee_s32 seed5_volatile=0;
-
-static CORE_TICKS t0, t1;
-
-void start_time(void)
-{
-  t0 = get_timer_value();
-}
-
-void stop_time(void)
-{
-  t1 = get_timer_value();
-}
-
-CORE_TICKS get_time(void)
-{
-  return t1 - t0;
-}
-
-secs_ret time_in_secs(CORE_TICKS ticks)
-{
-  // scale timer down to avoid uint64_t -> double conversion in RV32
-  int scale = 256;
-  uint32_t delta = ticks / scale;
-  uint32_t freq = get_timer_freq() / scale;
-  return delta / (double)freq;
-}
diff --git a/software/coremark/core_portme.h b/software/coremark/core_portme.h
deleted file mode 100644
index 82298d6..0000000
--- a/software/coremark/core_portme.h
+++ /dev/null
@@ -1,58 +0,0 @@
-#ifndef FESDK_CORE_PORTME_H
-#define FESDK_CORE_PORTME_H
-
-#include <stdint.h>
-#include <stddef.h>
-
-#define HAS_FLOAT 1
-#define HAS_TIME_H 1
-#define USE_CLOCK 1
-#define HAS_STDIO 1
-#define HAS_PRINTF 1
-#define SEED_METHOD SEED_VOLATILE
-#define CORE_TICKS uint64_t
-#define ee_u8 uint8_t
-#define ee_u16 uint16_t
-#define ee_u32 uint32_t
-#define ee_s16 int16_t
-#define ee_s32 int32_t
-#define ee_ptr_int uintptr_t
-#define ee_size_t size_t
-#define COMPILER_FLAGS FLAGS_STR
-
-#define align_mem(x) (void *)(((ee_ptr_int)(x) + sizeof(ee_u32) - 1) & -sizeof(ee_u32))
-
-#ifdef __GNUC__
-# define COMPILER_VERSION "GCC"__VERSION__
-#else
-# error
-#endif
-
-#define MEM_METHOD MEM_STACK
-#define MEM_LOCATION "STACK"
-
-#define MAIN_HAS_NOARGC 0
-#define MAIN_HAS_NORETURN 0
-
-#define MULTITHREAD 1
-#define USE_PTHREAD 0
-#define USE_FORK 0
-#define USE_SOCKET 0
-
-#define default_num_contexts MULTITHREAD
-
-typedef int core_portable;
-static void portable_init(core_portable *p, int *argc, char *argv[]) {}
-static void portable_fini(core_portable *p) {}
-
-#if !defined(PROFILE_RUN) && !defined(PERFORMANCE_RUN) && !defined(VALIDATION_RUN)
-#if (TOTAL_DATA_SIZE==1200)
-#define PROFILE_RUN 1
-#elif (TOTAL_DATA_SIZE==2000)
-#define PERFORMANCE_RUN 1
-#else
-#define VALIDATION_RUN 1
-#endif
-#endif
-
-#endif
diff --git a/software/coreplexip_welcome/.unsupported-boards b/software/coreplexip_welcome/.unsupported-boards
deleted file mode 100644
index 33cea3a..0000000
--- a/software/coreplexip_welcome/.unsupported-boards
+++ /dev/null
@@ -1,2 +0,0 @@
-freedom-e300-arty
-freedom-e300-hifive1
diff --git a/software/coreplexip_welcome/Makefile b/software/coreplexip_welcome/Makefile
deleted file mode 100644
index e56ed12..0000000
--- a/software/coreplexip_welcome/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-TARGET = coreplexip_welcome
-CFLAGS += -O2 -fno-builtin-printf -DNO_INIT
-
-BSP_BASE = ../../bsp
-
-C_SRCS += coreplexip_welcome.c
-
-include $(BSP_BASE)/env/common.mk
diff --git a/software/coreplexip_welcome/coreplexip_welcome.c b/software/coreplexip_welcome/coreplexip_welcome.c
deleted file mode 100644
index c090b37..0000000
--- a/software/coreplexip_welcome/coreplexip_welcome.c
+++ /dev/null
@@ -1,124 +0,0 @@
-// See LICENSE for license details.
-
-#include <stdint.h>
-#include <stdbool.h>
-#include <stdatomic.h>
-#include "encoding.h"
-#include <platform.h>
-
-#ifndef _SIFIVE_COREPLEXIP_ARTY_H
-#error 'coreplexip_welcome' demo only supported for Coreplex IP Eval Kits
-#endif
-
-static const char sifive_msg[] = "\n\r\
-\n\r\
-                SIFIVE, INC.\n\r\
-\n\r\
-         5555555555555555555555555\n\r\
-        5555                   5555\n\r\
-       5555                     5555\n\r\
-      5555                       5555\n\r\
-     5555       5555555555555555555555\n\r\
-    5555       555555555555555555555555\n\r\
-   5555                             5555\n\r\
-  5555                               5555\n\r\
- 5555                                 5555\n\r\
-5555555555555555555555555555          55555\n\r\
- 55555           555555555           55555\n\r\
-   55555           55555           55555\n\r\
-     55555           5           55555\n\r\
-       55555                   55555\n\r\
-         55555               55555\n\r\
-           55555           55555\n\r\
-             55555       55555\n\r\
-               55555   55555\n\r\
-                 555555555\n\r\
-                   55555\n\r\
-                     5\n\r\
-\n\r\
-";
-
-#if __riscv_xlen == 32
-  static const char welcome_msg[] = "\n\r\
-\n\r\
-Welcome to the E31 Coreplex IP FPGA Evaluation Kit!\n\r\
-\n\r";
-#else
-static const char welcome_msg[] = "\n\r\
-\n\r\
-Welcome to the E51 Coreplex IP FPGA Evaluation Kit!\n\r\
-\n\r";
-#endif
-
-static void _putc(char c) {
-  while ((int32_t) UART0_REG(UART_REG_TXFIFO) < 0);
-  UART0_REG(UART_REG_TXFIFO) = c;
-}
-
-int _getc(char * c){
-  int32_t val = (int32_t) UART0_REG(UART_REG_RXFIFO);
-  if (val > 0) {
-    *c =  val & 0xFF;
-    return 1;
-  }
-  return 0;
-}
-
-static void _puts(const char * s) {
-  while (*s != '\0'){
-    _putc(*s++);
-  }
-}
-
-int main (void){
-
-  // 115200 Baud Rate at (65 / 2) MHz
-  UART0_REG(UART_REG_DIV) = 282;
-  UART0_REG(UART_REG_TXCTRL) = UART_TXEN;
-  UART0_REG(UART_REG_RXCTRL) = UART_RXEN;
-
-  // Wait a bit because we were changing the GPIOs
-  volatile int i=0;
-  while(i < 10000){i++;}
-
-  _puts(sifive_msg);
-
-  _puts(welcome_msg);
-  
-  uint16_t r=0x3F;
-  uint16_t g=0;
-  uint16_t b=0;
-  // Set up RGB PWM
-  
-  PWM0_REG(PWM_CFG)   = 0;
-  PWM0_REG(PWM_CFG)   = (PWM_CFG_ENALWAYS) | (PWM_CFG_ZEROCMP) | (PWM_CFG_DEGLITCH);
-  PWM0_REG(PWM_COUNT) = 0;
-  
-  // The LEDs are intentionally left somewhat dim. 
-  PWM0_REG(PWM_CMP0)  = 0xFE;
-
-  while(1){
-    volatile uint64_t *  now = (volatile uint64_t*)(CLINT_CTRL_ADDR + CLINT_MTIME);
-    volatile uint64_t then = *now + 400;
-    while (*now < then) { }
-
-    if(r > 0 && b == 0){
-      r--;
-      g++;
-    }
-    if(g > 0 && r == 0){
-      g--;
-      b++;
-    }
-    if(b > 0 && g == 0){
-      r++;
-      b--;
-    }
-    
-    PWM0_REG(PWM_CMP1)  = 0xFF - (r >> 2);
-    PWM0_REG(PWM_CMP2)  = 0xFF - (g >> 2);
-    PWM0_REG(PWM_CMP3)  = 0xFF - (b >> 2);
-    
-  }// While (1)
-}
-  
diff --git a/software/demo_gpio/.gitignore b/software/demo_gpio/.gitignore
deleted file mode 100644
index 35566c7..0000000
--- a/software/demo_gpio/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-demo_gpio
diff --git a/software/demo_gpio/Makefile b/software/demo_gpio/Makefile
deleted file mode 100644
index b181c5f..0000000
--- a/software/demo_gpio/Makefile
+++ /dev/null
@@ -1,9 +0,0 @@
-TARGET = demo_gpio
-CFLAGS += -O2 -fno-builtin-printf -DUSE_PLIC -DUSE_M_TIME
-
-BSP_BASE = ../../bsp
-
-C_SRCS += demo_gpio.c
-C_SRCS += $(BSP_BASE)/drivers/plic/plic_driver.c
-
-include $(BSP_BASE)/env/common.mk
diff --git a/software/demo_gpio/demo_gpio.c b/software/demo_gpio/demo_gpio.c
deleted file mode 100644
index 8fe03e1..0000000
--- a/software/demo_gpio/demo_gpio.c
+++ /dev/null
@@ -1,252 +0,0 @@
-// See LICENSE for license details.
-
-#include <stdio.h>
-#include <stdlib.h>
-#include "platform.h"
-#include <string.h>
-#include "plic/plic_driver.h"
-#include "encoding.h"
-#include <unistd.h>
-#include "stdatomic.h"
-
-void reset_demo (void);
-
-// Structures for registering different interrupt handlers
-// for different parts of the application.
-typedef void (*function_ptr_t) (void);
-
-void no_interrupt_handler (void) {};
-
-function_ptr_t g_ext_interrupt_handlers[PLIC_NUM_INTERRUPTS];
-
-
-// Instance data for the PLIC.
-
-plic_instance_t g_plic;
-
-
-/*Entry Point for PLIC Interrupt Handler*/
-void handle_m_ext_interrupt(){
-  plic_source int_num  = PLIC_claim_interrupt(&g_plic);
-  if ((int_num >=1 ) && (int_num < PLIC_NUM_INTERRUPTS)) {
-    g_ext_interrupt_handlers[int_num]();
-  }
-  else {
-    exit(1 + (uintptr_t) int_num);
-  }
-  PLIC_complete_interrupt(&g_plic, int_num);
-}
-
-
-/*Entry Point for Machine Timer Interrupt Handler*/
-void handle_m_time_interrupt(){
-
-  clear_csr(mie, MIP_MTIP);
-
-  // Reset the timer for 3s in the future.
-  // This also clears the existing timer interrupt.
-
-  volatile uint64_t * mtime       = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME);
-  volatile uint64_t * mtimecmp    = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIMECMP);
-  uint64_t now = *mtime;
-  uint64_t then = now + 2 * RTC_FREQ;
-  *mtimecmp = then;
-
-  // read the current value of the LEDS and invert them.
-  uint32_t leds = GPIO_REG(GPIO_OUTPUT_VAL);
-
-  GPIO_REG(GPIO_OUTPUT_VAL) ^= ((0x1 << RED_LED_OFFSET)   |
-				(0x1 << GREEN_LED_OFFSET) |
-				(0x1 << BLUE_LED_OFFSET));
-  
-  // Re-enable the timer interrupt.
-  set_csr(mie, MIP_MTIP);
-
-}
-
-
-const char * instructions_msg = " \
-\n\
-                SIFIVE, INC.\n\
-\n\
-         5555555555555555555555555\n\
-        5555                   5555\n\
-       5555                     5555\n\
-      5555                       5555\n\
-     5555       5555555555555555555555\n\
-    5555       555555555555555555555555\n\
-   5555                             5555\n\
-  5555                               5555\n\
- 5555                                 5555\n\
-5555555555555555555555555555          55555\n\
- 55555           555555555           55555\n\
-   55555           55555           55555\n\
-     55555           5           55555\n\
-       55555                   55555\n\
-         55555               55555\n\
-           55555           55555\n\
-             55555       55555\n\
-               55555   55555\n\
-                 555555555\n\
-                   55555\n\
-                     5\n\
-\n\
-SiFive E-Series Software Development Kit 'demo_gpio' program.\n\
-Every 2 second, the Timer Interrupt will invert the LEDs.\n\
-(Arty Dev Kit Only): Press Buttons 0, 1, 2 to Set the LEDs.\n\
-Pin 19 (HiFive1) or A5 (Arty Dev Kit) is being bit-banged\n\
-for GPIO speed demonstration.\n\
-\n\
- ";
-
-void print_instructions() {
-
-  write (STDOUT_FILENO, instructions_msg, strlen(instructions_msg));
-
-}
-
-#ifdef HAS_BOARD_BUTTONS
-void button_0_handler(void) {
-
-  // Red LED on
-  GPIO_REG(GPIO_OUTPUT_VAL) |= (0x1 << RED_LED_OFFSET);
-
-  // Clear the GPIO Pending interrupt by writing 1.
-  GPIO_REG(GPIO_RISE_IP) = (0x1 << BUTTON_0_OFFSET);
-
-};
-
-void button_1_handler(void) {
-
-  // Green LED On
-  GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << GREEN_LED_OFFSET);
-
-  // Clear the GPIO Pending interrupt by writing 1.
-  GPIO_REG(GPIO_RISE_IP) = (0x1 << BUTTON_1_OFFSET);
-
-};
-
-
-void button_2_handler(void) {
-
-  // Blue LED On
-  GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << BLUE_LED_OFFSET);
-
-  GPIO_REG(GPIO_RISE_IP) = (0x1 << BUTTON_2_OFFSET);
-
-};
-#endif
-
-void reset_demo (){
-
-  // Disable the machine & timer interrupts until setup is done.
-
-  clear_csr(mie, MIP_MEIP);
-  clear_csr(mie, MIP_MTIP);
-
-  for (int ii = 0; ii < PLIC_NUM_INTERRUPTS; ii ++){
-    g_ext_interrupt_handlers[ii] = no_interrupt_handler;
-  }
-
-#ifdef HAS_BOARD_BUTTONS
-  g_ext_interrupt_handlers[INT_DEVICE_BUTTON_0] = button_0_handler;
-  g_ext_interrupt_handlers[INT_DEVICE_BUTTON_1] = button_1_handler;
-  g_ext_interrupt_handlers[INT_DEVICE_BUTTON_2] = button_2_handler;
-#endif
-
-  print_instructions();
-
-#ifdef HAS_BOARD_BUTTONS
-
-  // Have to enable the interrupt both at the GPIO level,
-  // and at the PLIC level.
-  PLIC_enable_interrupt (&g_plic, INT_DEVICE_BUTTON_0);
-  PLIC_enable_interrupt (&g_plic, INT_DEVICE_BUTTON_1);
-  PLIC_enable_interrupt (&g_plic, INT_DEVICE_BUTTON_2);
-
-  // Priority must be set > 0 to trigger the interrupt.
-  PLIC_set_priority(&g_plic, INT_DEVICE_BUTTON_0, 1);
-  PLIC_set_priority(&g_plic, INT_DEVICE_BUTTON_1, 1);
-  PLIC_set_priority(&g_plic, INT_DEVICE_BUTTON_2, 1);
-
-  GPIO_REG(GPIO_RISE_IE) |= (1 << BUTTON_0_OFFSET);
-  GPIO_REG(GPIO_RISE_IE) |= (1 << BUTTON_1_OFFSET);
-  GPIO_REG(GPIO_RISE_IE) |= (1 << BUTTON_2_OFFSET);
-
-#endif
-
-    // Set the machine timer to go off in 3 seconds.
-    // The
-    volatile uint64_t * mtime       = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME);
-    volatile uint64_t * mtimecmp    = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIMECMP);
-    uint64_t now = *mtime;
-    uint64_t then = now + 2*RTC_FREQ;
-    *mtimecmp = then;
-
-    // Enable the Machine-External bit in MIE
-    set_csr(mie, MIP_MEIP);
-
-    // Enable the Machine-Timer bit in MIE
-    set_csr(mie, MIP_MTIP);
-
-    // Enable interrupts in general.
-    set_csr(mstatus, MSTATUS_MIE);
-}
-
-int main(int argc, char **argv)
-{
-  // Set up the GPIOs such that the LED GPIO
-  // can be used as both Inputs and Outputs.
-  
-
-#ifdef HAS_BOARD_BUTTONS
-  GPIO_REG(GPIO_OUTPUT_EN)  &= ~((0x1 << BUTTON_0_OFFSET) | (0x1 << BUTTON_1_OFFSET) | (0x1 << BUTTON_2_OFFSET));
-  GPIO_REG(GPIO_PULLUP_EN)  &= ~((0x1 << BUTTON_0_OFFSET) | (0x1 << BUTTON_1_OFFSET) | (0x1 << BUTTON_2_OFFSET));
-  GPIO_REG(GPIO_INPUT_EN)   |=  ((0x1 << BUTTON_0_OFFSET) | (0x1 << BUTTON_1_OFFSET) | (0x1 << BUTTON_2_OFFSET));
-#endif
-
-  GPIO_REG(GPIO_INPUT_EN)    &= ~((0x1<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET) | (0x1 << BLUE_LED_OFFSET)) ;
-  GPIO_REG(GPIO_OUTPUT_EN)   |=  ((0x1<< RED_LED_OFFSET)| (0x1<< GREEN_LED_OFFSET) | (0x1 << BLUE_LED_OFFSET)) ;
-  GPIO_REG(GPIO_OUTPUT_VAL)  |=   (0x1 << BLUE_LED_OFFSET) ;
-  GPIO_REG(GPIO_OUTPUT_VAL)  &=  ~((0x1<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET)) ;
-
-  
-  // For Bit-banging with Atomics demo.
-  
-  uint32_t bitbang_mask = 0;
-#ifdef _SIFIVE_HIFIVE1_H
-  bitbang_mask = (1 << PIN_19_OFFSET);
-#else
-#ifdef _SIFIVE_COREPLEXIP_ARTY_H
-  bitbang_mask = (0x1 << JA_0_OFFSET);
-#endif
-#endif
-
-  GPIO_REG(GPIO_OUTPUT_EN) |= bitbang_mask;
-  
-  /**************************************************************************
-   * Set up the PLIC
-   *
-   *************************************************************************/
-  PLIC_init(&g_plic,
-	    PLIC_CTRL_ADDR,
-	    PLIC_NUM_INTERRUPTS,
-	    PLIC_NUM_PRIORITIES);
-
-  reset_demo();
-
-  /**************************************************************************
-   * Demonstrate fast GPIO bit-banging.
-   * One can bang it faster than this if you know
-   * the entire OUTPUT_VAL that you want to write, but 
-   * Atomics give a quick way to control a single bit.
-   *************************************************************************/
-  // For Bit-banging with Atomics demo.
-  
-  while (1){
-    atomic_fetch_xor_explicit(&GPIO_REG(GPIO_OUTPUT_VAL), bitbang_mask, memory_order_relaxed);
-  }
-
-  return 0;
-
-}
diff --git a/software/dhrystone/.gitignore b/software/dhrystone/.gitignore
deleted file mode 100644
index eb51a6c..0000000
--- a/software/dhrystone/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-dhrystone
diff --git a/software/dhrystone/Makefile b/software/dhrystone/Makefile
deleted file mode 100644
index 4602653..0000000
--- a/software/dhrystone/Makefile
+++ /dev/null
@@ -1,21 +0,0 @@
-TARGET := dhrystone
-
-ASM_SRCS := 
-C_SRCS := dhry_stubs.c dhry_printf.c
-HEADERS := dhry.h
-
-DHRY_SRCS := dhry_1.c dhry_2.c
-DHRY_CFLAGS := -O3 -DTIME -fno-inline -fno-builtin-printf -Wno-implicit -mcmodel=medany -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI)
-
-XLEN ?= 32
-CFLAGS := -O3 -fno-common  -mcmodel=medany -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI) -mexplicit-relocs -DNOENUM -falign-functions=4
-LDFLAGS := -Wl,--wrap=scanf -Wl,--wrap=printf  -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI) -mcmodel=medany
-
-DHRY_OBJS := $(patsubst %.c,%.o,$(DHRY_SRCS))
-LINK_OBJS := $(DHRY_OBJS)
-
-BSP_BASE = ../../bsp
-include $(BSP_BASE)/env/common.mk
-
-$(DHRY_OBJS): %.o: %.c $(HEADERS)
-	$(CC) $(CFLAGS) $(DHRY_CFLAGS) -c -o $@ $<
diff --git a/software/dhrystone/dhry.h b/software/dhrystone/dhry.h
deleted file mode 100644
index b556ecc..0000000
--- a/software/dhrystone/dhry.h
+++ /dev/null
@@ -1,423 +0,0 @@
-/*
- ****************************************************************************
- *
- *                   "DHRYSTONE" Benchmark Program
- *                   -----------------------------
- *                                                                            
- *  Version:    C, Version 2.1
- *                                                                            
- *  File:       dhry.h (part 1 of 3)
- *
- *  Date:       May 25, 1988
- *
- *  Author:     Reinhold P. Weicker
- *                      Siemens AG, AUT E 51
- *                      Postfach 3220
- *                      8520 Erlangen
- *                      Germany (West)
- *                              Phone:  [+49]-9131-7-20330
- *                                      (8-17 Central European Time)
- *                              Usenet: ..!mcsun!unido!estevax!weicker
- *
- *              Original Version (in Ada) published in
- *              "Communications of the ACM" vol. 27., no. 10 (Oct. 1984),
- *              pp. 1013 - 1030, together with the statistics
- *              on which the distribution of statements etc. is based.
- *
- *              In this C version, the following C library functions are used:
- *              - strcpy, strcmp (inside the measurement loop)
- *              - printf, scanf (outside the measurement loop)
- *              In addition, Berkeley UNIX system calls "times ()" or "time ()"
- *              are used for execution time measurement. For measurements
- *              on other systems, these calls have to be changed.
- *
- *  Collection of Results:
- *              Reinhold Weicker (address see above) and
- *              
- *              Rick Richardson
- *              PC Research. Inc.
- *              94 Apple Orchard Drive
- *              Tinton Falls, NJ 07724
- *                      Phone:  (201) 389-8963 (9-17 EST)               
- *                      Usenet: ...!uunet!pcrat!rick
- *
- *      Please send results to Rick Richardson and/or Reinhold Weicker.
- *      Complete information should be given on hardware and software used.
- *      Hardware information includes: Machine type, CPU, type and size
- *      of caches; for microprocessors: clock frequency, memory speed
- *      (number of wait states).
- *      Software information includes: Compiler (and runtime library)
- *      manufacturer and version, compilation switches, OS version.
- *      The Operating System version may give an indication about the
- *      compiler; Dhrystone itself performs no OS calls in the measurement loop.
- *
- *      The complete output generated by the program should be mailed
- *      such that at least some checks for correctness can be made.
- *
- ***************************************************************************
- *
- *  History:    This version C/2.1 has been made for two reasons:
- *
- *              1) There is an obvious need for a common C version of
- *              Dhrystone, since C is at present the most popular system
- *              programming language for the class of processors
- *              (microcomputers, minicomputers) where Dhrystone is used most.
- *              There should be, as far as possible, only one C version of
- *              Dhrystone such that results can be compared without
- *              restrictions. In the past, the C versions distributed
- *              by Rick Richardson (Version 1.1) and by Reinhold Weicker
- *              had small (though not significant) differences.
- *
- *              2) As far as it is possible without changes to the Dhrystone
- *              statistics, optimizing compilers should be prevented from
- *              removing significant statements.
- *
- *              This C version has been developed in cooperation with
- *              Rick Richardson (Tinton Falls, NJ), it incorporates many
- *              ideas from the "Version 1.1" distributed previously by
- *              him over the UNIX network Usenet.
- *              I also thank Chaim Benedelac (National Semiconductor),
- *              David Ditzel (SUN), Earl Killian and John Mashey (MIPS),
- *              Alan Smith and Rafael Saavedra-Barrera (UC at Berkeley)
- *              for their help with comments on earlier versions of the
- *              benchmark.
- *
- *  Changes:    In the initialization part, this version follows mostly
- *              Rick Richardson's version distributed via Usenet, not the
- *              version distributed earlier via floppy disk by Reinhold Weicker.
- *              As a concession to older compilers, names have been made
- *              unique within the first 8 characters.
- *              Inside the measurement loop, this version follows the
- *              version previously distributed by Reinhold Weicker.
- *
- *              At several places in the benchmark, code has been added,
- *              but within the measurement loop only in branches that 
- *              are not executed. The intention is that optimizing compilers
- *              should be prevented from moving code out of the measurement
- *              loop, or from removing code altogether. Since the statements
- *              that are executed within the measurement loop have NOT been
- *              changed, the numbers defining the "Dhrystone distribution"
- *              (distribution of statements, operand types and locality)
- *              still hold. Except for sophisticated optimizing compilers,
- *              execution times for this version should be the same as
- *              for previous versions.
- *              
- *              Since it has proven difficult to subtract the time for the
- *              measurement loop overhead in a correct way, the loop check
- *              has been made a part of the benchmark. This does have
- *              an impact - though a very minor one - on the distribution
- *              statistics which have been updated for this version.
- *
- *              All changes within the measurement loop are described
- *              and discussed in the companion paper "Rationale for
- *              Dhrystone version 2".
- *
- *              Because of the self-imposed limitation that the order and
- *              distribution of the executed statements should not be
- *              changed, there are still cases where optimizing compilers
- *              may not generate code for some statements. To a certain
- *              degree, this is unavoidable for small synthetic benchmarks.
- *              Users of the benchmark are advised to check code listings
- *              whether code is generated for all statements of Dhrystone.
- *
- *              Version 2.1 is identical to version 2.0 distributed via
- *              the UNIX network Usenet in March 1988 except that it corrects
- *              some minor deficiencies that were found by users of version 2.0.
- *              The only change within the measurement loop is that a
- *              non-executed "else" part was added to the "if" statement in
- *              Func_3, and a non-executed "else" part removed from Proc_3.
- *
- ***************************************************************************
- *
- * Defines:     The following "Defines" are possible:
- *              -DREG=register          (default: Not defined)
- *                      As an approximation to what an average C programmer
- *                      might do, the "register" storage class is applied
- *                      (if enabled by -DREG=register)
- *                      - for local variables, if they are used (dynamically)
- *                        five or more times
- *                      - for parameters if they are used (dynamically)
- *                        six or more times
- *                      Note that an optimal "register" strategy is
- *                      compiler-dependent, and that "register" declarations
- *                      do not necessarily lead to faster execution.
- *              -DNOSTRUCTASSIGN        (default: Not defined)
- *                      Define if the C compiler does not support
- *                      assignment of structures.
- *              -DNOENUMS               (default: Not defined)
- *                      Define if the C compiler does not support
- *                      enumeration types.
- *              -DTIMES                 (default)
- *              -DTIME
- *                      The "times" function of UNIX (returning process times)
- *                      or the "time" function (returning wallclock time)
- *                      is used for measurement. 
- *                      For single user machines, "time ()" is adequate. For
- *                      multi-user machines where you cannot get single-user
- *                      access, use the "times ()" function. If you have
- *                      neither, use a stopwatch in the dead of night.
- *                      "printf"s are provided marking the points "Start Timer"
- *                      and "Stop Timer". DO NOT use the UNIX "time(1)"
- *                      command, as this will measure the total time to
- *                      run this program, which will (erroneously) include
- *                      the time to allocate storage (malloc) and to perform
- *                      the initialization.
- *              -DHZ=nnn
- *                      In Berkeley UNIX, the function "times" returns process
- *                      time in 1/HZ seconds, with HZ = 60 for most systems.
- *                      CHECK YOUR SYSTEM DESCRIPTION BEFORE YOU JUST APPLY
- *                      A VALUE.
- *
- ***************************************************************************
- *
- *  Compilation model and measurement (IMPORTANT):
- *
- *  This C version of Dhrystone consists of three files:
- *  - dhry.h (this file, containing global definitions and comments)
- *  - dhry_1.c (containing the code corresponding to Ada package Pack_1)
- *  - dhry_2.c (containing the code corresponding to Ada package Pack_2)
- *
- *  The following "ground rules" apply for measurements:
- *  - Separate compilation
- *  - No procedure merging
- *  - Otherwise, compiler optimizations are allowed but should be indicated
- *  - Default results are those without register declarations
- *  See the companion paper "Rationale for Dhrystone Version 2" for a more
- *  detailed discussion of these ground rules.
- *
- *  For 16-Bit processors (e.g. 80186, 80286), times for all compilation
- *  models ("small", "medium", "large" etc.) should be given if possible,
- *  together with a definition of these models for the compiler system used.
- *
- **************************************************************************
- *
- *  Dhrystone (C version) statistics:
- *
- *  [Comment from the first distribution, updated for version 2.
- *   Note that because of language differences, the numbers are slightly
- *   different from the Ada version.]
- *
- *  The following program contains statements of a high level programming
- *  language (here: C) in a distribution considered representative:           
- *
- *    assignments                  52 (51.0 %)
- *    control statements           33 (32.4 %)
- *    procedure, function calls    17 (16.7 %)
- *
- *  103 statements are dynamically executed. The program is balanced with
- *  respect to the three aspects:                                             
- *
- *    - statement type
- *    - operand type
- *    - operand locality
- *         operand global, local, parameter, or constant.                     
- *
- *  The combination of these three aspects is balanced only approximately.    
- *
- *  1. Statement Type:                                                        
- *  -----------------             number
- *
- *     V1 = V2                     9
- *       (incl. V1 = F(..)
- *     V = Constant               12
- *     Assignment,                 7
- *       with array element
- *     Assignment,                 6
- *       with record component
- *                                --
- *                                34       34
- *
- *     X = Y +|-|"&&"|"|" Z        5
- *     X = Y +|-|"==" Constant     6
- *     X = X +|- 1                 3
- *     X = Y *|/ Z                 2
- *     X = Expression,             1
- *           two operators
- *     X = Expression,             1
- *           three operators
- *                                --
- *                                18       18
- *
- *     if ....                    14
- *       with "else"      7
- *       without "else"   7
- *           executed        3
- *           not executed    4
- *     for ...                     7  |  counted every time
- *     while ...                   4  |  the loop condition
- *     do ... while                1  |  is evaluated
- *     switch ...                  1
- *     break                       1
- *     declaration with            1
- *       initialization
- *                                --
- *                                34       34
- *
- *     P (...)  procedure call    11
- *       user procedure      10
- *       library procedure    1
- *     X = F (...)
- *             function  call      6
- *       user function        5                                         
- *       library function     1                                               
- *                                --                                          
- *                                17       17
- *                                        ---
- *                                        103
- *
- *    The average number of parameters in procedure or function calls
- *    is 1.82 (not counting the function values as implicit parameters).
- *
- *
- *  2. Operators
- *  ------------
- *                          number    approximate
- *                                    percentage
- *
- *    Arithmetic             32          50.8                                 
- *
- *       +                     21          33.3                              
- *       -                      7          11.1                              
- *       *                      3           4.8
- *       / (int div)            1           1.6
- *
- *    Comparison             27           42.8
- *
- *       ==                     9           14.3
- *       /=                     4            6.3
- *       >                      1            1.6
- *       <                      3            4.8
- *       >=                     1            1.6
- *       <=                     9           14.3
- *
- *    Logic                   4            6.3
- *
- *       && (AND-THEN)          1            1.6
- *       |  (OR)                1            1.6
- *       !  (NOT)               2            3.2
- * 
- *                           --          -----
- *                           63          100.1
- *
- *
- *  3. Operand Type (counted once per operand reference):
- *  ---------------
- *                          number    approximate
- *                                    percentage
- *
- *     Integer               175        72.3 %
- *     Character              45        18.6 %
- *     Pointer                12         5.0 %
- *     String30                6         2.5 %
- *     Array                   2         0.8 %
- *     Record                  2         0.8 %
- *                           ---       -------
- *                           242       100.0 %
- *
- *  When there is an access path leading to the final operand (e.g. a record
- *  component), only the final data type on the access path is counted.       
- *
- *
- *  4. Operand Locality:                                                      
- *  -------------------
- *                                number    approximate
- *                                          percentage
- *
- *     local variable              114        47.1 %
- *     global variable              22         9.1 %
- *     parameter                    45        18.6 %
- *        value                        23         9.5 %
- *        reference                    22         9.1 %
- *     function result               6         2.5 %
- *     constant                     55        22.7 %
- *                                 ---       -------
- *                                 242       100.0 %
- *
- *
- *  The program does not compute anything meaningful, but it is syntactically
- *  and semantically correct. All variables have a value assigned to them
- *  before they are used as a source operand.
- *
- *  There has been no explicit effort to account for the effects of a
- *  cache, or to balance the use of long or short displacements for code or
- *  data.
- *
- ***************************************************************************
- */
-
-/* Compiler and system dependent definitions: */
-
-#ifndef TIME
-#define TIMES
-#endif
-                /* Use times(2) time function unless    */
-                /* explicitly defined otherwise         */
-
-#ifdef TIMES
-#include <sys/types.h>
-#include <sys/times.h>
-                /* for "times" */
-#endif
-
-#define Mic_secs_Per_Second     1000000
-                /* Berkeley UNIX C returns process times in seconds/HZ */
-
-#ifdef  NOSTRUCTASSIGN
-#define structassign(d, s)      memcpy(&(d), &(s), sizeof(d))
-#else
-#define structassign(d, s)      d = s
-#endif
-
-#ifdef  NOENUM
-#define Ident_1 0
-#define Ident_2 1
-#define Ident_3 2
-#define Ident_4 3
-#define Ident_5 4
-  typedef int   Enumeration;
-#else
-  typedef       enum    {Ident_1, Ident_2, Ident_3, Ident_4, Ident_5}
-                Enumeration;
-#endif
-        /* for boolean and enumeration types in Ada, Pascal */
-
-/* General definitions: */
-
-#include <stdio.h>
-                /* for strcpy, strcmp */
-
-#define Null 0 
-                /* Value of a Null pointer */
-#define true  1
-#define false 0
-
-typedef int     One_Thirty;
-typedef int     One_Fifty;
-typedef char    Capital_Letter;
-typedef int     Boolean;
-typedef char    Str_30 [31];
-typedef int     Arr_1_Dim [50];
-typedef int     Arr_2_Dim [50] [50];
-
-typedef struct record 
-    {
-    struct record *Ptr_Comp;
-    Enumeration    Discr;
-    union {
-          struct {
-                  Enumeration Enum_Comp;
-                  int         Int_Comp;
-                  char        Str_Comp [31];
-                  } var_1;
-          struct {
-                  Enumeration E_Comp_2;
-                  char        Str_2_Comp [31];
-                  } var_2;
-          struct {
-                  char        Ch_1_Comp;
-                  char        Ch_2_Comp;
-                  } var_3;
-          } variant;
-      } Rec_Type, *Rec_Pointer;
-
-
diff --git a/software/dhrystone/dhry_1.c b/software/dhrystone/dhry_1.c
deleted file mode 100644
index 7ab02a8..0000000
--- a/software/dhrystone/dhry_1.c
+++ /dev/null
@@ -1,385 +0,0 @@
-/*
- ****************************************************************************
- *
- *                   "DHRYSTONE" Benchmark Program
- *                   -----------------------------
- *                                                                            
- *  Version:    C, Version 2.1
- *                                                                            
- *  File:       dhry_1.c (part 2 of 3)
- *
- *  Date:       May 25, 1988
- *
- *  Author:     Reinhold P. Weicker
- *
- ****************************************************************************
- */
-
-#include "dhry.h"
-
-/* Global Variables: */
-
-Rec_Pointer     Ptr_Glob,
-                Next_Ptr_Glob;
-int             Int_Glob;
-Boolean         Bool_Glob;
-char            Ch_1_Glob,
-                Ch_2_Glob;
-int             Arr_1_Glob [50];
-int             Arr_2_Glob [50] [50];
-
-extern char     *malloc ();
-Enumeration     Func_1 ();
-  /* forward declaration necessary since Enumeration may not simply be int */
-
-#ifndef REG
-        Boolean Reg = false;
-#define REG
-        /* REG becomes defined as empty */
-        /* i.e. no register variables   */
-#else
-        Boolean Reg = true;
-#endif
-
-/* variables for time measurement: */
-
-#ifdef TIMES
-struct tms      time_info;
-extern  int     times ();
-                /* see library function "times" */
-#define Too_Small_Time 120
-                /* Measurements should last at least about 2 seconds */
-#endif
-#ifdef TIME
-extern long     time();
-                /* see library function "time"  */
-#define Too_Small_Time 2
-                /* Measurements should last at least 2 seconds */
-#endif
-
-long            Begin_Time,
-                End_Time,
-                User_Time;
-float           Microseconds,
-                Dhrystones_Per_Second;
-
-/* end of variables for time measurement */
-
-
-main ()
-/*****/
-
-  /* main program, corresponds to procedures        */
-  /* Main and Proc_0 in the Ada version             */
-{
-        One_Fifty       Int_1_Loc;
-  REG   One_Fifty       Int_2_Loc;
-        One_Fifty       Int_3_Loc;
-  REG   char            Ch_Index;
-        Enumeration     Enum_Loc;
-        Str_30          Str_1_Loc;
-        Str_30          Str_2_Loc;
-  REG   int             Run_Index;
-  REG   int             Number_Of_Runs;
-
-  /* Initializations */
-
-  Next_Ptr_Glob = (Rec_Pointer) malloc (sizeof (Rec_Type));
-  Ptr_Glob = (Rec_Pointer) malloc (sizeof (Rec_Type));
-
-  Ptr_Glob->Ptr_Comp                    = Next_Ptr_Glob;
-  Ptr_Glob->Discr                       = Ident_1;
-  Ptr_Glob->variant.var_1.Enum_Comp     = Ident_3;
-  Ptr_Glob->variant.var_1.Int_Comp      = 40;
-  strcpy (Ptr_Glob->variant.var_1.Str_Comp, 
-          "DHRYSTONE PROGRAM, SOME STRING");
-  strcpy (Str_1_Loc, "DHRYSTONE PROGRAM, 1'ST STRING");
-
-  Arr_2_Glob [8][7] = 10;
-        /* Was missing in published program. Without this statement,    */
-        /* Arr_2_Glob [8][7] would have an undefined value.             */
-        /* Warning: With 16-Bit processors and Number_Of_Runs > 32000,  */
-        /* overflow may occur for this array element.                   */
-
-  printf ("\n");
-  printf ("Dhrystone Benchmark, Version 2.1 (Language: C)\n");
-  printf ("\n");
-  if (Reg)
-  {
-    printf ("Program compiled with 'register' attribute\n");
-    printf ("\n");
-  }
-  else
-  {
-    printf ("Program compiled without 'register' attribute\n");
-    printf ("\n");
-  }
-  printf ("Please give the number of runs through the benchmark: ");
-  {
-    int n;
-    scanf ("%d", &n);
-    Number_Of_Runs = n;
-  }
-  printf ("\n");
-
-  printf ("Execution starts, %d runs through Dhrystone\n", Number_Of_Runs);
-
-  /***************/
-  /* Start timer */
-  /***************/
- 
-#ifdef TIMES
-  times (&time_info);
-  Begin_Time = (long) time_info.tms_utime;
-#endif
-#ifdef TIME
-  Begin_Time = time ( (long *) 0);
-#endif
-
-  for (Run_Index = 1; Run_Index <= Number_Of_Runs; ++Run_Index)
-  {
-
-    Proc_5();
-    Proc_4();
-      /* Ch_1_Glob == 'A', Ch_2_Glob == 'B', Bool_Glob == true */
-    Int_1_Loc = 2;
-    Int_2_Loc = 3;
-    strcpy (Str_2_Loc, "DHRYSTONE PROGRAM, 2'ND STRING");
-    Enum_Loc = Ident_2;
-    Bool_Glob = ! Func_2 (Str_1_Loc, Str_2_Loc);
-      /* Bool_Glob == 1 */
-    while (Int_1_Loc < Int_2_Loc)  /* loop body executed once */
-    {
-      Int_3_Loc = 5 * Int_1_Loc - Int_2_Loc;
-        /* Int_3_Loc == 7 */
-      Proc_7 (Int_1_Loc, Int_2_Loc, &Int_3_Loc);
-        /* Int_3_Loc == 7 */
-      Int_1_Loc += 1;
-    } /* while */
-      /* Int_1_Loc == 3, Int_2_Loc == 3, Int_3_Loc == 7 */
-    Proc_8 (Arr_1_Glob, Arr_2_Glob, Int_1_Loc, Int_3_Loc);
-      /* Int_Glob == 5 */
-    Proc_1 (Ptr_Glob);
-    for (Ch_Index = 'A'; Ch_Index <= Ch_2_Glob; ++Ch_Index)
-                             /* loop body executed twice */
-    {
-      if (Enum_Loc == Func_1 (Ch_Index, 'C'))
-          /* then, not executed */
-        {
-        Proc_6 (Ident_1, &Enum_Loc);
-        strcpy (Str_2_Loc, "DHRYSTONE PROGRAM, 3'RD STRING");
-        Int_2_Loc = Run_Index;
-        Int_Glob = Run_Index;
-        }
-    }
-      /* Int_1_Loc == 3, Int_2_Loc == 3, Int_3_Loc == 7 */
-    Int_2_Loc = Int_2_Loc * Int_1_Loc;
-    Int_1_Loc = Int_2_Loc / Int_3_Loc;
-    Int_2_Loc = 7 * (Int_2_Loc - Int_3_Loc) - Int_1_Loc;
-      /* Int_1_Loc == 1, Int_2_Loc == 13, Int_3_Loc == 7 */
-    Proc_2 (&Int_1_Loc);
-      /* Int_1_Loc == 5 */
-
-  } /* loop "for Run_Index" */
-
-  /**************/
-  /* Stop timer */
-  /**************/
-  
-#ifdef TIMES
-  times (&time_info);
-  End_Time = (long) time_info.tms_utime;
-#endif
-#ifdef TIME
-  End_Time = time ( (long *) 0);
-#endif
-
-  printf ("Execution ends\n");
-  printf ("\n");
-  printf ("Final values of the variables used in the benchmark:\n");
-  printf ("\n");
-  printf ("Int_Glob:            %d\n", Int_Glob);
-  printf ("        should be:   %d\n", 5);
-  printf ("Bool_Glob:           %d\n", Bool_Glob);
-  printf ("        should be:   %d\n", 1);
-  printf ("Ch_1_Glob:           %c\n", Ch_1_Glob);
-  printf ("        should be:   %c\n", 'A');
-  printf ("Ch_2_Glob:           %c\n", Ch_2_Glob);
-  printf ("        should be:   %c\n", 'B');
-  printf ("Arr_1_Glob[8]:       %d\n", Arr_1_Glob[8]);
-  printf ("        should be:   %d\n", 7);
-  printf ("Arr_2_Glob[8][7]:    %d\n", Arr_2_Glob[8][7]);
-  printf ("        should be:   Number_Of_Runs + 10\n");
-  printf ("Ptr_Glob->\n");
-  printf ("  Ptr_Comp:          %d\n", (int) Ptr_Glob->Ptr_Comp);
-  printf ("        should be:   (implementation-dependent)\n");
-  printf ("  Discr:             %d\n", Ptr_Glob->Discr);
-  printf ("        should be:   %d\n", 0);
-  printf ("  Enum_Comp:         %d\n", Ptr_Glob->variant.var_1.Enum_Comp);
-  printf ("        should be:   %d\n", 2);
-  printf ("  Int_Comp:          %d\n", Ptr_Glob->variant.var_1.Int_Comp);
-  printf ("        should be:   %d\n", 17);
-  printf ("  Str_Comp:          %s\n", Ptr_Glob->variant.var_1.Str_Comp);
-  printf ("        should be:   DHRYSTONE PROGRAM, SOME STRING\n");
-  printf ("Next_Ptr_Glob->\n");
-  printf ("  Ptr_Comp:          %d\n", (int) Next_Ptr_Glob->Ptr_Comp);
-  printf ("        should be:   (implementation-dependent), same as above\n");
-  printf ("  Discr:             %d\n", Next_Ptr_Glob->Discr);
-  printf ("        should be:   %d\n", 0);
-  printf ("  Enum_Comp:         %d\n", Next_Ptr_Glob->variant.var_1.Enum_Comp);
-  printf ("        should be:   %d\n", 1);
-  printf ("  Int_Comp:          %d\n", Next_Ptr_Glob->variant.var_1.Int_Comp);
-  printf ("        should be:   %d\n", 18);
-  printf ("  Str_Comp:          %s\n",
-                                Next_Ptr_Glob->variant.var_1.Str_Comp);
-  printf ("        should be:   DHRYSTONE PROGRAM, SOME STRING\n");
-  printf ("Int_1_Loc:           %d\n", Int_1_Loc);
-  printf ("        should be:   %d\n", 5);
-  printf ("Int_2_Loc:           %d\n", Int_2_Loc);
-  printf ("        should be:   %d\n", 13);
-  printf ("Int_3_Loc:           %d\n", Int_3_Loc);
-  printf ("        should be:   %d\n", 7);
-  printf ("Enum_Loc:            %d\n", Enum_Loc);
-  printf ("        should be:   %d\n", 1);
-  printf ("Str_1_Loc:           %s\n", Str_1_Loc);
-  printf ("        should be:   DHRYSTONE PROGRAM, 1'ST STRING\n");
-  printf ("Str_2_Loc:           %s\n", Str_2_Loc);
-  printf ("        should be:   DHRYSTONE PROGRAM, 2'ND STRING\n");
-  printf ("\n");
-
-  User_Time = End_Time - Begin_Time;
-
-  if (User_Time < Too_Small_Time)
-  {
-    printf ("Measured time too small to obtain meaningful results\n");
-    printf ("Please increase number of runs\n");
-    printf ("\n");
-  }
-  else
-  {
-#ifdef TIME
-    Microseconds = (float) User_Time * Mic_secs_Per_Second 
-                        / (float) Number_Of_Runs;
-    Dhrystones_Per_Second = (float) Number_Of_Runs / (float) User_Time;
-#else
-    Microseconds = (float) User_Time * Mic_secs_Per_Second 
-                        / ((float) HZ * ((float) Number_Of_Runs));
-    Dhrystones_Per_Second = ((float) HZ * (float) Number_Of_Runs)
-                        / (float) User_Time;
-#endif
-    printf ("Microseconds for one run through Dhrystone: ");
-    printf ("%6.1f \n", Microseconds);
-    printf ("Dhrystones per Second:                      ");
-    printf ("%6.1f \n", Dhrystones_Per_Second);
-    printf ("\n");
-  }
-  
-}
-
-
-Proc_1 (Ptr_Val_Par)
-/******************/
-
-REG Rec_Pointer Ptr_Val_Par;
-    /* executed once */
-{
-  REG Rec_Pointer Next_Record = Ptr_Val_Par->Ptr_Comp;  
-                                        /* == Ptr_Glob_Next */
-  /* Local variable, initialized with Ptr_Val_Par->Ptr_Comp,    */
-  /* corresponds to "rename" in Ada, "with" in Pascal           */
-  
-  structassign (*Ptr_Val_Par->Ptr_Comp, *Ptr_Glob); 
-  Ptr_Val_Par->variant.var_1.Int_Comp = 5;
-  Next_Record->variant.var_1.Int_Comp 
-        = Ptr_Val_Par->variant.var_1.Int_Comp;
-  Next_Record->Ptr_Comp = Ptr_Val_Par->Ptr_Comp;
-  Proc_3 (&Next_Record->Ptr_Comp);
-    /* Ptr_Val_Par->Ptr_Comp->Ptr_Comp 
-                        == Ptr_Glob->Ptr_Comp */
-  if (Next_Record->Discr == Ident_1)
-    /* then, executed */
-  {
-    Next_Record->variant.var_1.Int_Comp = 6;
-    Proc_6 (Ptr_Val_Par->variant.var_1.Enum_Comp, 
-           &Next_Record->variant.var_1.Enum_Comp);
-    Next_Record->Ptr_Comp = Ptr_Glob->Ptr_Comp;
-    Proc_7 (Next_Record->variant.var_1.Int_Comp, 10, 
-           &Next_Record->variant.var_1.Int_Comp);
-  }
-  else /* not executed */
-    structassign (*Ptr_Val_Par, *Ptr_Val_Par->Ptr_Comp);
-} /* Proc_1 */
-
-
-Proc_2 (Int_Par_Ref)
-/******************/
-    /* executed once */
-    /* *Int_Par_Ref == 1, becomes 4 */
-
-One_Fifty   *Int_Par_Ref;
-{
-  One_Fifty  Int_Loc;  
-  Enumeration   Enum_Loc;
-
-  Int_Loc = *Int_Par_Ref + 10;
-  do /* executed once */
-    if (Ch_1_Glob == 'A')
-      /* then, executed */
-    {
-      Int_Loc -= 1;
-      *Int_Par_Ref = Int_Loc - Int_Glob;
-      Enum_Loc = Ident_1;
-    } /* if */
-  while (Enum_Loc != Ident_1); /* true */
-} /* Proc_2 */
-
-
-Proc_3 (Ptr_Ref_Par)
-/******************/
-    /* executed once */
-    /* Ptr_Ref_Par becomes Ptr_Glob */
-
-Rec_Pointer *Ptr_Ref_Par;
-
-{
-  if (Ptr_Glob != Null)
-    /* then, executed */
-    *Ptr_Ref_Par = Ptr_Glob->Ptr_Comp;
-  Proc_7 (10, Int_Glob, &Ptr_Glob->variant.var_1.Int_Comp);
-} /* Proc_3 */
-
-
-Proc_4 () /* without parameters */
-/*******/
-    /* executed once */
-{
-  Boolean Bool_Loc;
-
-  Bool_Loc = Ch_1_Glob == 'A';
-  Bool_Glob = Bool_Loc | Bool_Glob;
-  Ch_2_Glob = 'B';
-} /* Proc_4 */
-
-
-Proc_5 () /* without parameters */
-/*******/
-    /* executed once */
-{
-  Ch_1_Glob = 'A';
-  Bool_Glob = false;
-} /* Proc_5 */
-
-
-        /* Procedure for the assignment of structures,          */
-        /* if the C compiler doesn't support this feature       */
-#ifdef  NOSTRUCTASSIGN
-memcpy (d, s, l)
-register char   *d;
-register char   *s;
-register int    l;
-{
-        while (l--) *d++ = *s++;
-}
-#endif
-
-
diff --git a/software/dhrystone/dhry_2.c b/software/dhrystone/dhry_2.c
deleted file mode 100644
index 63a3d3e..0000000
--- a/software/dhrystone/dhry_2.c
+++ /dev/null
@@ -1,192 +0,0 @@
-/*
- ****************************************************************************
- *
- *                   "DHRYSTONE" Benchmark Program
- *                   -----------------------------
- *                                                                            
- *  Version:    C, Version 2.1
- *                                                                            
- *  File:       dhry_2.c (part 3 of 3)
- *
- *  Date:       May 25, 1988
- *
- *  Author:     Reinhold P. Weicker
- *
- ****************************************************************************
- */
-
-#include "dhry.h"
-
-#ifndef REG
-#define REG
-        /* REG becomes defined as empty */
-        /* i.e. no register variables   */
-#endif
-
-extern  int     Int_Glob;
-extern  char    Ch_1_Glob;
-
-
-Proc_6 (Enum_Val_Par, Enum_Ref_Par)
-/*********************************/
-    /* executed once */
-    /* Enum_Val_Par == Ident_3, Enum_Ref_Par becomes Ident_2 */
-
-Enumeration  Enum_Val_Par;
-Enumeration *Enum_Ref_Par;
-{
-  *Enum_Ref_Par = Enum_Val_Par;
-  if (! Func_3 (Enum_Val_Par))
-    /* then, not executed */
-    *Enum_Ref_Par = Ident_4;
-  switch (Enum_Val_Par)
-  {
-    case Ident_1: 
-      *Enum_Ref_Par = Ident_1;
-      break;
-    case Ident_2: 
-      if (Int_Glob > 100)
-        /* then */
-      *Enum_Ref_Par = Ident_1;
-      else *Enum_Ref_Par = Ident_4;
-      break;
-    case Ident_3: /* executed */
-      *Enum_Ref_Par = Ident_2;
-      break;
-    case Ident_4: break;
-    case Ident_5: 
-      *Enum_Ref_Par = Ident_3;
-      break;
-  } /* switch */
-} /* Proc_6 */
-
-
-Proc_7 (Int_1_Par_Val, Int_2_Par_Val, Int_Par_Ref)
-/**********************************************/
-    /* executed three times                                      */ 
-    /* first call:      Int_1_Par_Val == 2, Int_2_Par_Val == 3,  */
-    /*                  Int_Par_Ref becomes 7                    */
-    /* second call:     Int_1_Par_Val == 10, Int_2_Par_Val == 5, */
-    /*                  Int_Par_Ref becomes 17                   */
-    /* third call:      Int_1_Par_Val == 6, Int_2_Par_Val == 10, */
-    /*                  Int_Par_Ref becomes 18                   */
-One_Fifty       Int_1_Par_Val;
-One_Fifty       Int_2_Par_Val;
-One_Fifty      *Int_Par_Ref;
-{
-  One_Fifty Int_Loc;
-
-  Int_Loc = Int_1_Par_Val + 2;
-  *Int_Par_Ref = Int_2_Par_Val + Int_Loc;
-} /* Proc_7 */
-
-
-Proc_8 (Arr_1_Par_Ref, Arr_2_Par_Ref, Int_1_Par_Val, Int_2_Par_Val)
-/*********************************************************************/
-    /* executed once      */
-    /* Int_Par_Val_1 == 3 */
-    /* Int_Par_Val_2 == 7 */
-Arr_1_Dim       Arr_1_Par_Ref;
-Arr_2_Dim       Arr_2_Par_Ref;
-int             Int_1_Par_Val;
-int             Int_2_Par_Val;
-{
-  REG One_Fifty Int_Index;
-  REG One_Fifty Int_Loc;
-
-  Int_Loc = Int_1_Par_Val + 5;
-  Arr_1_Par_Ref [Int_Loc] = Int_2_Par_Val;
-  Arr_1_Par_Ref [Int_Loc+1] = Arr_1_Par_Ref [Int_Loc];
-  Arr_1_Par_Ref [Int_Loc+30] = Int_Loc;
-  for (Int_Index = Int_Loc; Int_Index <= Int_Loc+1; ++Int_Index)
-    Arr_2_Par_Ref [Int_Loc] [Int_Index] = Int_Loc;
-  Arr_2_Par_Ref [Int_Loc] [Int_Loc-1] += 1;
-  Arr_2_Par_Ref [Int_Loc+20] [Int_Loc] = Arr_1_Par_Ref [Int_Loc];
-  Int_Glob = 5;
-} /* Proc_8 */
-
-
-Enumeration Func_1 (Ch_1_Par_Val, Ch_2_Par_Val)
-/*************************************************/
-    /* executed three times                                         */
-    /* first call:      Ch_1_Par_Val == 'H', Ch_2_Par_Val == 'R'    */
-    /* second call:     Ch_1_Par_Val == 'A', Ch_2_Par_Val == 'C'    */
-    /* third call:      Ch_1_Par_Val == 'B', Ch_2_Par_Val == 'C'    */
-
-Capital_Letter   Ch_1_Par_Val;
-Capital_Letter   Ch_2_Par_Val;
-{
-  Capital_Letter        Ch_1_Loc;
-  Capital_Letter        Ch_2_Loc;
-
-  Ch_1_Loc = Ch_1_Par_Val;
-  Ch_2_Loc = Ch_1_Loc;
-  if (Ch_2_Loc != Ch_2_Par_Val)
-    /* then, executed */
-    return (Ident_1);
-  else  /* not executed */
-  {
-    Ch_1_Glob = Ch_1_Loc;
-    return (Ident_2);
-   }
-} /* Func_1 */
-
-
-Boolean Func_2 (Str_1_Par_Ref, Str_2_Par_Ref)
-/*************************************************/
-    /* executed once */
-    /* Str_1_Par_Ref == "DHRYSTONE PROGRAM, 1'ST STRING" */
-    /* Str_2_Par_Ref == "DHRYSTONE PROGRAM, 2'ND STRING" */
-
-Str_30  Str_1_Par_Ref;
-Str_30  Str_2_Par_Ref;
-{
-  REG One_Thirty        Int_Loc;
-      Capital_Letter    Ch_Loc;
-
-  Int_Loc = 2;
-  while (Int_Loc <= 2) /* loop body executed once */
-    if (Func_1 (Str_1_Par_Ref[Int_Loc],
-                Str_2_Par_Ref[Int_Loc+1]) == Ident_1)
-      /* then, executed */
-    {
-      Ch_Loc = 'A';
-      Int_Loc += 1;
-    } /* if, while */
-  if (Ch_Loc >= 'W' && Ch_Loc < 'Z')
-    /* then, not executed */
-    Int_Loc = 7;
-  if (Ch_Loc == 'R')
-    /* then, not executed */
-    return (true);
-  else /* executed */
-  {
-    if (strcmp (Str_1_Par_Ref, Str_2_Par_Ref) > 0)
-      /* then, not executed */
-    {
-      Int_Loc += 7;
-      Int_Glob = Int_Loc;
-      return (true);
-    }
-    else /* executed */
-      return (false);
-  } /* if Ch_Loc */
-} /* Func_2 */
-
-
-Boolean Func_3 (Enum_Par_Val)
-/***************************/
-    /* executed once        */
-    /* Enum_Par_Val == Ident_3 */
-Enumeration Enum_Par_Val;
-{
-  Enumeration Enum_Loc;
-
-  Enum_Loc = Enum_Par_Val;
-  if (Enum_Loc == Ident_3)
-    /* then, executed */
-    return (true);
-  else /* not executed */
-    return (false);
-} /* Func_3 */
-
diff --git a/software/dhrystone/dhry_printf.c b/software/dhrystone/dhry_printf.c
deleted file mode 100644
index 025d231..0000000
--- a/software/dhrystone/dhry_printf.c
+++ /dev/null
@@ -1,271 +0,0 @@
-/* The functions in this file are only meant to support Dhrystone on an
- * embedded RV32 system and are obviously incorrect in general. */
-
-#include <stdarg.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdint.h>
-#include <string.h>
-#include <unistd.h>
-
-#undef putchar
-int putchar(int ch)
-{
-  return write(1, &ch, 1) == 1 ? ch : -1;
-}
-
-static void sprintf_putch(int ch, void** data)
-{
-  char** pstr = (char**)data;
-  **pstr = ch;
-  (*pstr)++;
-}
-
-static unsigned long getuint(va_list *ap, int lflag)
-{
-  if (lflag)
-    return va_arg(*ap, unsigned long);
-  else
-    return va_arg(*ap, unsigned int);
-}
-
-static long getint(va_list *ap, int lflag)
-{
-  if (lflag)
-    return va_arg(*ap, long);
-  else
-    return va_arg(*ap, int);
-}
-
-static inline void printnum(void (*putch)(int, void**), void **putdat,
-                    unsigned long num, unsigned base, int width, int padc)
-{
-  unsigned digs[sizeof(num)*8];
-  int pos = 0;
-
-  while (1)
-  {
-    digs[pos++] = num % base;
-    if (num < base)
-      break;
-    num /= base;
-  }
-
-  while (width-- > pos)
-    putch(padc, putdat);
-
-  while (pos-- > 0)
-    putch(digs[pos] + (digs[pos] >= 10 ? 'a' - 10 : '0'), putdat);
-}
-
-static inline void print_double(void (*putch)(int, void**), void **putdat,
-                                double num, int width, int prec)
-{
-  union {
-    double d;
-    uint64_t u;
-  } u;
-  u.d = num;
-
-  if (u.u & (1ULL << 63)) {
-    putch('-', putdat);
-    u.u &= ~(1ULL << 63);
-  }
-
-  for (int i = 0; i < prec; i++)
-    u.d *= 10;
-
-  char buf[32], *pbuf = buf;
-  printnum(sprintf_putch, (void**)&pbuf, (unsigned long)u.d, 10, 0, 0);
-  if (prec > 0) {
-    for (int i = 0; i < prec; i++) {
-      pbuf[-i] = pbuf[-i-1];
-    }
-    pbuf[-prec] = '.';
-    pbuf++;
-  }
-
-  for (char* p = buf; p < pbuf; p++)
-    putch(*p, putdat);
-}
-
-static void vprintfmt(void (*putch)(int, void**), void **putdat, const char *fmt, va_list ap)
-{
-  register const char* p;
-  const char* last_fmt;
-  register int ch, err;
-  unsigned long num;
-  int base, lflag, width, precision, altflag;
-  char padc;
-
-  while (1) {
-    while ((ch = *(unsigned char *) fmt) != '%') {
-      if (ch == '\0')
-        return;
-      fmt++;
-      putch(ch, putdat);
-    }
-    fmt++;
-
-    // Process a %-escape sequence
-    last_fmt = fmt;
-    padc = ' ';
-    width = -1;
-    precision = -1;
-    lflag = 0;
-    altflag = 0;
-  reswitch:
-    switch (ch = *(unsigned char *) fmt++) {
-
-    // flag to pad on the right
-    case '-':
-      padc = '-';
-      goto reswitch;
-      
-    // flag to pad with 0's instead of spaces
-    case '0':
-      padc = '0';
-      goto reswitch;
-
-    // width field
-    case '1':
-    case '2':
-    case '3':
-    case '4':
-    case '5':
-    case '6':
-    case '7':
-    case '8':
-    case '9':
-      for (precision = 0; ; ++fmt) {
-        precision = precision * 10 + ch - '0';
-        ch = *fmt;
-        if (ch < '0' || ch > '9')
-          break;
-      }
-      goto process_precision;
-
-    case '*':
-      precision = va_arg(ap, int);
-      goto process_precision;
-
-    case '.':
-      if (width < 0)
-        width = 0;
-      goto reswitch;
-
-    case '#':
-      altflag = 1;
-      goto reswitch;
-
-    process_precision:
-      if (width < 0)
-        width = precision, precision = -1;
-      goto reswitch;
-
-    // long flag
-    case 'l':
-      if (lflag)
-        goto bad;
-      goto reswitch;
-
-    // character
-    case 'c':
-      putch(va_arg(ap, int), putdat);
-      break;
-
-    // double
-    case 'f':
-      print_double(putch, putdat, va_arg(ap, double), width, precision);
-      break;
-
-    // string
-    case 's':
-      if ((p = va_arg(ap, char *)) == NULL)
-        p = "(null)";
-      if (width > 0 && padc != '-')
-        for (width -= strnlen(p, precision); width > 0; width--)
-          putch(padc, putdat);
-      for (; (ch = *p) != '\0' && (precision < 0 || --precision >= 0); width--) {
-        putch(ch, putdat);
-        p++;
-      }
-      for (; width > 0; width--)
-        putch(' ', putdat);
-      break;
-
-    // (signed) decimal
-    case 'd':
-      num = getint(&ap, lflag);
-      if ((long) num < 0) {
-        putch('-', putdat);
-        num = -(long) num;
-      }
-      base = 10;
-      goto signed_number;
-
-    // unsigned decimal
-    case 'u':
-      base = 10;
-      goto unsigned_number;
-
-    // (unsigned) octal
-    case 'o':
-      // should do something with padding so it's always 3 octits
-      base = 8;
-      goto unsigned_number;
-
-    // pointer
-    case 'p':
-      lflag = 1;
-      putch('0', putdat);
-      putch('x', putdat);
-      /* fall through to 'x' */
-
-    // (unsigned) hexadecimal
-    case 'x':
-      base = 16;
-    unsigned_number:
-      num = getuint(&ap, lflag);
-    signed_number:
-      printnum(putch, putdat, num, base, width, padc);
-      break;
-
-    // escaped '%' character
-    case '%':
-      putch(ch, putdat);
-      break;
-      
-    // unrecognized escape sequence - just print it literally
-    default:
-    bad:
-      putch('%', putdat);
-      fmt = last_fmt;
-      break;
-    }
-  }
-}
-
-int __wrap_printf(const char* fmt, ...)
-{
-  va_list ap;
-  va_start(ap, fmt);
-
-  vprintfmt((void*)putchar, 0, fmt, ap);
-
-  va_end(ap);
-  return 0; // incorrect return value, but who cares, anyway?
-}
-
-int __wrap_sprintf(char* str, const char* fmt, ...)
-{
-  va_list ap;
-  char* str0 = str;
-  va_start(ap, fmt);
-
-  vprintfmt(sprintf_putch, (void**)&str, fmt, ap);
-  *str = 0;
-
-  va_end(ap);
-  return str - str0;
-}
diff --git a/software/dhrystone/dhry_stubs.c b/software/dhrystone/dhry_stubs.c
deleted file mode 100644
index 0616f86..0000000
--- a/software/dhrystone/dhry_stubs.c
+++ /dev/null
@@ -1,15 +0,0 @@
-#include "platform.h"
-
-/* The functions in this file are only meant to support Dhrystone on an
- * embedded RV32 system and are obviously incorrect in general. */
-
-long time(void)
-{
-  return get_timer_value() / get_timer_freq();
-}
-
-// set the number of dhrystone iterations
-void __wrap_scanf(const char* fmt, int* n)
-{
-  *n = 100000000;
-}
diff --git a/software/double_tap_dontboot/.unsupported-boards b/software/double_tap_dontboot/.unsupported-boards
deleted file mode 100644
index 4e93148..0000000
--- a/software/double_tap_dontboot/.unsupported-boards
+++ /dev/null
@@ -1,3 +0,0 @@
-coreplexip-e31-arty
-coreplexip-e51-arty
-
diff --git a/software/double_tap_dontboot/Makefile b/software/double_tap_dontboot/Makefile
deleted file mode 100644
index ae89c51..0000000
--- a/software/double_tap_dontboot/Makefile
+++ /dev/null
@@ -1,6 +0,0 @@
-TARGET = double_tap_dontboot
-C_SRCS += double_tap_dontboot.c
-CFLAGS += -O2 -fno-builtin-printf -DNO_INIT
-
-BSP_BASE = ../../bsp
-include $(BSP_BASE)/env/common.mk
diff --git a/software/double_tap_dontboot/double_tap_dontboot.c b/software/double_tap_dontboot/double_tap_dontboot.c
deleted file mode 100644
index 53c2c64..0000000
--- a/software/double_tap_dontboot/double_tap_dontboot.c
+++ /dev/null
@@ -1,153 +0,0 @@
-// See LICENSE for license details.
-
-// This is the 'bootloader' which ships on HiFive1 boards,
-// at SPI Flash location 0x20000000.
-// HiFive1 boards have code burned into their OTP which ends with
-// a jump to 0x20000000. The Freedom E SDK and the Arduino IDE
-// linker scripts cause user programs to be compiled and
-// flashed at 0x20400000. Therefore, this code ultimately jumps
-// to 0x20400000, while attempting to leave the machine state as close
-// to its reset state as possible.
-//
-// When compiled in the freedom-e-sdk environment, this code will
-// be compiled as a user program at 0x20400000, so will continuously jump to itself.
-// It is provided in the freedom-e-sdk mostly for reference purposes, so
-// users know what is running on their board. Replacing the bootloader
-// at 0x20000000 is not currently supported by the SDK.
-//
-// These are the instructions for the user of this program, from the
-// HiFive1 Getting Started Guide:
-// 
-// This program is designed to allow quick boot, but
-// also a "safe" reboot option if a "bad" program
-// is flashed into the HiFive1's SPI Flash. A "bad" program
-// is one which makes it impossible for the programmer
-// to communicate with the HiFive1. For example, a program which
-// disables FE310's active clock, or which puts the FE310 to sleep
-// with no way of waking it up. Bad programs can always be restarted using
-// the RESET button, and using the "safe" bootloader can be halted
-// before they perform any unsafe behavior.
-//
-// To activate "normal" boot mode, press the RESET button on
-// the HiFive1. After approximately 1s, the green LED will flash
-// for 1/2 second, then the user program will execute.
-//
-// To activate "safe" boot mode, press the RESET button. When
-// the green LED flashes, immediately press the RESET button again.
-// After 1 second, the red LED will blink. The user program will not
-// execute, and the programmer can connect. To exit "safe" boot mode,
-// press the RESET button a final time.
-
-#include <stdint.h>
-#include "platform.h"
-#include "encoding.h"
-
-#ifndef _SIFIVE_HIFIVE1_H
-#error "double_tap_dontboot is designed to run on HiFive1 and/or E300 Arty Dev Kit."
-#endif
-
-
-#define BACKUP15_MAGIC 0xD027B007
-
-#define FINAL_ADDRESS 0x20400000
-
-#define RED_LED 22
-#define GREEN_LED 19
-
-int main(void)
-{
-  uint64_t now;
-  uint64_t then;
-  
-  // Restore the default mtvec (which may have been set by initialization
-  // code, depending on the environment in which this C code is compiled).
-  // By default, this would cause an infinite loop upon exception, which is
-  // also "safe" behavior and the debugger can connect.
-  
-  write_csr(mtvec, 0x0);
-  
-  // How did we get here? We only want to execute this code
-  // on resets (vs waking up from sleep).
-  if ((AON_REG(AON_PMUCAUSE) & AON_PMUCAUSE_WAKEUPCAUSE) ==
-      AON_WAKEUPCAUSE_RESET) {
-
-    if (AON_REG(AON_BACKUP15) == BACKUP15_MAGIC) {
-      // Reset was "double-tapped".
-
-      // Re-arm the reset double-tap
-      AON_REG(AON_BACKUP15) = 0;
-
-      // PWM Red LED
-
-      GPIO_REG(GPIO_IOF_EN)     |=   (1 << RED_LED);
-      GPIO_REG(GPIO_OUTPUT_XOR) &=  ~(1 << RED_LED);
-      GPIO_REG(GPIO_IOF_SEL)    |=   (1 << RED_LED);
-
-      GPIO_REG(GPIO_OUTPUT_VAL) &=  ~(1 << GREEN_LED);
-      GPIO_REG(GPIO_OUTPUT_XOR) &=  ~(1 << GREEN_LED);
-      GPIO_REG(GPIO_OUTPUT_EN)  &=  ~(1 << GREEN_LED);
-
-      PWM1_REG(PWM_CFG)   = 0;
-      PWM1_REG(PWM_COUNT) = 0;
-      PWM1_REG(PWM_CMP0)  = 0xFF;
-      PWM1_REG(PWM_CMP3)  = 0xFF;
-      PWM1_REG(PWM_CFG)   = PWM_CFG_ENALWAYS;
-
-      int pwm_val = 255;
-	
-      // Wait for debugger or another RESET press.
-      while(1){
-
-	// Make the PWM a fade. This is preferable to just a PWM blink
-	// because it makes it clear that the processor is actually
-	// running this code, not just the PWM hardware.
-
-	now = *((volatile uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME));
-	then = now + 32768/500;
-	while (*((volatile uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME)) < then) {
-	  asm volatile ("");
-	}
-	pwm_val = (pwm_val == 0) ? 255 : (pwm_val -1);
-	PWM1_REG(PWM_CMP3) = pwm_val << 4;
-      }
-           
-    } // If Magic
-      
-      // Turn on Green LED to indicate time-to-double-tap
-      // LEDs are Active-Low
-    GPIO_REG(GPIO_OUTPUT_VAL)     |=  (1 << GREEN_LED);
-    GPIO_REG(GPIO_OUTPUT_XOR)     |=  (1 << GREEN_LED);
-    GPIO_REG(GPIO_OUTPUT_EN)      |=  (1 << GREEN_LED);
-
-    // Re-arm the reset double-tap
-    uint32_t save = AON_REG(AON_BACKUP15);
-      
-    AON_REG(AON_BACKUP15) = BACKUP15_MAGIC;
-
-    // Wait 500 ms. If reset is tapped at this point,
-    // we will execute the "magic" loop above.
-    now = *((volatile uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME));
-    then = now + 32768/2;
-    while (*((volatile uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME)) < then) {
-      asm volatile ("");
-    }
-      
-    // Re-arm the reset double-tap
-    AON_REG(AON_BACKUP15) = save;
-   
-  }
-  
-  // Restore the GPIO Registers to their default
-  GPIO_REG(GPIO_OUTPUT_VAL)     = 0;
-  GPIO_REG(GPIO_OUTPUT_XOR)     = 0;
-  GPIO_REG(GPIO_OUTPUT_EN)      = 0;
-
-  // Jump to "user code" in SPI Flash.
-  void (*pgm_start)(void) = (void*) FINAL_ADDRESS;
-  pgm_start();
-
-  // This value is meaningless, but
-  // since this code should never be reached,
-  // make it non-zero.
-  return (1234567);
-}
diff --git a/software/global_interrupts/.unsupported-boards b/software/global_interrupts/.unsupported-boards
deleted file mode 100644
index 33cea3a..0000000
--- a/software/global_interrupts/.unsupported-boards
+++ /dev/null
@@ -1,2 +0,0 @@
-freedom-e300-arty
-freedom-e300-hifive1
diff --git a/software/global_interrupts/Makefile b/software/global_interrupts/Makefile
deleted file mode 100644
index 6a09f97..0000000
--- a/software/global_interrupts/Makefile
+++ /dev/null
@@ -1,9 +0,0 @@
-TARGET = global_interrupts
-CFLAGS += -O2 -fno-builtin-printf -DUSE_LOCAL_ISR
-
-BSP_BASE = ../../bsp
-
-C_SRCS += global_interrupts.c
-C_SRCS += $(BSP_BASE)/drivers/plic/plic_driver.c
-
-include $(BSP_BASE)/env/common.mk
diff --git a/software/global_interrupts/global_interrupts.c b/software/global_interrupts/global_interrupts.c
deleted file mode 100644
index 4d3a554..0000000
--- a/software/global_interrupts/global_interrupts.c
+++ /dev/null
@@ -1,250 +0,0 @@
-// See LICENSE for license details.
-
-#include <stdio.h>
-#include <stdlib.h>
-#include "platform.h"
-#include <string.h>
-#include "plic/plic_driver.h"
-#include "encoding.h"
-#include <unistd.h>
-
-#ifndef _SIFIVE_COREPLEXIP_ARTY_H
-#error 'global_interrupts' demo only supported for Coreplex IP Eval Kits
-#endif
-
-// Global Instance data for the PLIC
-// for use by the PLIC Driver.
-plic_instance_t g_plic;
-
-// Flag for state
-int g_switch1Wins;
-
-// Debounce counter (PWM can't go slow enough)
-int g_debounce;
-
-void debounce();
-
-// Structures for registering different interrupt handlers
-// for different parts of the application.
-typedef void (*interrupt_function_ptr_t) (void);
-
-// See bsp/env/<BOARD>/init.c for how this
-// interrupt vector is used.
-interrupt_function_ptr_t localISR[32]; 
-
-interrupt_function_ptr_t g_ext_interrupt_handlers[PLIC_NUM_INTERRUPTS];
-
-void set_timer() {
-  
-  volatile uint64_t * mtime       = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME);
-  volatile uint64_t * mtimecmp    = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIMECMP);
-  uint64_t now = *mtime;
-  uint64_t then = now + 10*RTC_FREQ;
-  *mtimecmp = then;
-
-}
-
-/*Entry Point for Machine Timer Interrupt Handler*/
-void mti_isr(){
- 
-  if (g_switch1Wins) {
-    printf("#### Giving Switch 1 Priority for 10 seconds ####\n");
-    // All other things being equal, lower IDs have
-    // higher priority. We have already set
-    // Switch 1 to priority 2
-    // in the setup, so by giving these equal priority Switch 1 will win.
-    PLIC_set_priority(&g_plic, INT_EXT_DEVICE_SW_2, 2);
-  } else {
-    printf("**** Giving Switch 2 Priority for 10 seconds ****\n");
-    // By setting Switch 2 a higher integer priority, it will win over switch 1.
-    PLIC_set_priority(&g_plic, INT_EXT_DEVICE_SW_2, 3);
-  }    
-  g_switch1Wins ^= 0x1;
-
-  set_timer();
-
-}
-
-/*Entry Point for PLIC Interrupt Handler*/
-void mei_isr(){
-  plic_source int_num  = PLIC_claim_interrupt(&g_plic);
-  if ((int_num >=1 ) && (int_num < PLIC_NUM_INTERRUPTS)) {
-    g_ext_interrupt_handlers[int_num]();
-  }
-  else {
-    exit(1 + (uintptr_t) int_num);
-  }
-  PLIC_complete_interrupt(&g_plic, int_num);
-}
-
-const char * instructions_msg = " \
-\n\
-                SIFIVE, INC.\n\
-E31/E51 Coreplex IP Eval Kit 'global_interrupts' demo.\n\
-\n\
-Switches  1 and 2 are enabled as External Global Interrupts \n\
-(they don't go through the PLIC). You an observe priorities.\n\
-Priorities invert every few seconds, which is driven by the \n\
-PWM0 global interrupt.                                      \n\
-\n";
-
-void print_instructions() {
-
-  write (STDOUT_FILENO, instructions_msg, strlen(instructions_msg));
-
-}
-
-void invalid_global_isr() {
-  printf("Unexpected global interrupt!\n");
-}
-
-void invalid_local_isr() {
-  printf ("Unexpected local interrupt!\n");
-}
-
-void switch_1_handler() {
-
-  printf("Switch 1 is on! Even if Switch 2 is on, Switch 1 must have higher priority right now.\n");
-  
-  // Set Green LED
-  GPIO_REG(GPIO_OUTPUT_VAL)  |=  (0x1 << GREEN_LED_OFFSET) ;
-  GPIO_REG(GPIO_OUTPUT_VAL)  &=  ~((0x1<< RED_LED_OFFSET));
-
-  debounce();
-  
-}
-
-void switch_2_handler() {
-  printf("Switch 2 is on! Even if Switch 1 is on, Switch 2 must have higher priority right now.\n");
-
-  // Set RED LED
-  GPIO_REG(GPIO_OUTPUT_VAL)  &=  ~(0x1 << GREEN_LED_OFFSET) ;
-  GPIO_REG(GPIO_OUTPUT_VAL)  |=   (0x1<< RED_LED_OFFSET);
-
-  debounce();
-}
-
-// We use PWM 0 as a 
-// timer interrupt for debouncing.
-
-void pwm_0_handler() {
-
-
-  if (g_debounce == 0) {
-    printf("    Done debouncing.\n");
-    
-    //Lower the threshold s.t. the switches can hit.
-    PLIC_set_threshold(&g_plic, 1);
-    
-    // Clear the PWM interrupt
-    PWM0_REG(PWM_CFG) = 0;
-    
-  } else {
-    // Keep waiting
-    g_debounce --;
-    // This clears out the interrupt and re-arms the timer.
-    PWM0_REG(PWM_CFG) = ((PWM_CFG_ONESHOT) | (PWM_CFG_ZEROCMP)| 0x7 | (PWM_CFG_STICKY));
-    
-  }
-
-}
-
-void debounce(int local_interrupt_num) {
-
-  printf("    Starting a debounce.\n");
-
-  g_debounce = 600;
-  
-  // This clears out the interrupt and re-arms the timer.
-  PWM0_REG(PWM_CFG) = ((PWM_CFG_ONESHOT) | (PWM_CFG_ZEROCMP)| 0x7 | (PWM_CFG_STICKY));
-  
-  // Set the threshold high enough that the
-  // switches won't cause the interrupt to fire,
-  // only the PWM or timer interrupts.
-  PLIC_set_threshold(&g_plic, 4);
-
-}
-
-int main(int argc, char **argv)
-{
-
-  for (int gisr = 0; gisr < PLIC_NUM_INTERRUPTS; gisr++){
-    g_ext_interrupt_handlers[PLIC_NUM_INTERRUPTS] = invalid_global_isr;
-  }
-  g_ext_interrupt_handlers[PWM0_INT_BASE + 0] = pwm_0_handler;
-  g_ext_interrupt_handlers[INT_EXT_DEVICE_SW_1] = switch_1_handler;
-  g_ext_interrupt_handlers[INT_EXT_DEVICE_SW_2] = switch_2_handler;
-  
-  for (int lisr = 0; lisr < 32; lisr++){
-    localISR[lisr] = invalid_local_isr;
-  }
-  
-  localISR[IRQ_M_TIMER] = mti_isr;
-  localISR[IRQ_M_EXT]   = mei_isr;
-
-  print_instructions();
-  
-  // Set up RGB LEDs for a visual.
-  
-  GPIO_REG(GPIO_OUTPUT_EN)   |=  ((0x1<< RED_LED_OFFSET)| (0x1<< GREEN_LED_OFFSET));
-  GPIO_REG(GPIO_OUTPUT_VAL)  |=  (0x1 << GREEN_LED_OFFSET) ;
-  GPIO_REG(GPIO_OUTPUT_VAL)  &=  ~(0x1<< RED_LED_OFFSET);
-				   
-  /**************************************************************************
-   * Set up the PLIC
-   *
-   *************************************************************************/
-  PLIC_init(&g_plic,
-	    PLIC_CTRL_ADDR,
-	    PLIC_NUM_INTERRUPTS,
-	    PLIC_NUM_PRIORITIES);
-
-  /**************************************************************************
-   * Give Switch 1 and Switch 2 Equal priority of 2.
-   *
-   *************************************************************************/
-
-  PLIC_enable_interrupt (&g_plic, PWM0_INT_BASE + 0);
-  PLIC_enable_interrupt (&g_plic, INT_EXT_DEVICE_SW_1);
-  PLIC_enable_interrupt (&g_plic, INT_EXT_DEVICE_SW_2);
-
-  // PWM always beats the switches, because we use it
-  // as a debouncer, and we lower the threshold
-  // to do so.
-
-  PWM0_REG(PWM_CFG) = 0;
-
-  // Make sure people aren't blinded by LEDs connected here.
-  PWM0_REG(PWM_CMP0)  = 0xFE;
-  PWM0_REG(PWM_CMP1)  = 0xFF;
-  PWM0_REG(PWM_CMP2)  = 0xFF;
-  PWM0_REG(PWM_CMP3)  = 0xFF;
-  PLIC_set_priority(&g_plic, PWM0_INT_BASE + 0   , 5);
-
-  // Start the switches out at the same priority. Switch1
-  // would win.
-  PLIC_set_priority(&g_plic, INT_EXT_DEVICE_SW_1, 2);
-  PLIC_set_priority(&g_plic, INT_EXT_DEVICE_SW_2, 2);
-
-  // Set up machine timer interrupt. Every few seconds it
-  // will invert the switch priorities.
-  set_timer();
-
-  // Enable timer interrupts.
-  set_csr(mie, MIP_MTIP);
-
-  // Enable Global (PLIC) interrupts.
-  set_csr(mie, MIP_MEIP);
-
-  g_switch1Wins = 1;
-  
-  // Enable all interrupts
-  set_csr(mstatus, MSTATUS_MIE);
-  
-  while(1){
-    asm volatile ("wfi");
-  }
-  
-  return 0;
-
-}
diff --git a/software/i2c_demo/.gitignore b/software/i2c_demo/.gitignore
deleted file mode 100644
index 7a8011b..0000000
--- a/software/i2c_demo/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-i2c_demo
diff --git a/software/i2c_demo/Makefile b/software/i2c_demo/Makefile
deleted file mode 100644
index ef29ef2..0000000
--- a/software/i2c_demo/Makefile
+++ /dev/null
@@ -1,6 +0,0 @@
-TARGET = i2c_demo
-C_SRCS += i2c_demo.c
-CFLAGS += -O2 -fno-builtin-printf
-
-BSP_BASE = ../../bsp
-include $(BSP_BASE)/env/common.mk
diff --git a/software/i2c_demo/i2c_demo.c b/software/i2c_demo/i2c_demo.c
deleted file mode 100644
index 4011c09..0000000
--- a/software/i2c_demo/i2c_demo.c
+++ /dev/null
@@ -1,318 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include "platform.h"
-#include <string.h>
-#include <unistd.h>
-#include <math.h>
-#include "stdatomic.h"
-
-#define MPU6050_ADDR 0x68
-
-#define MPU6050_RA_ACCEL_XOUT_H     0x3B
-#define MPU6050_RA_ACCEL_XOUT_L     0x3C
-#define MPU6050_RA_ACCEL_YOUT_H     0x3D
-#define MPU6050_RA_ACCEL_YOUT_L     0x3E
-#define MPU6050_RA_ACCEL_ZOUT_H     0x3F
-#define MPU6050_RA_ACCEL_ZOUT_L     0x40
-#define MPU6050_RA_TEMP_OUT_H       0x41
-#define MPU6050_RA_TEMP_OUT_L       0x42
-#define MPU6050_RA_GYRO_XOUT_H      0x43
-#define MPU6050_RA_GYRO_XOUT_L      0x44
-#define MPU6050_RA_GYRO_YOUT_H      0x45
-#define MPU6050_RA_GYRO_YOUT_L      0x46
-#define MPU6050_RA_GYRO_ZOUT_H      0x47
-#define MPU6050_RA_GYRO_ZOUT_L      0x48
-#define MPU6050_RA_PWR_MGMT_1       0x6B
-#define MPU6050_RA_WHO_AM_I         0x75
-
-#define SDA PIN_8_OFFSET
-#define SCL PIN_9_OFFSET
-
-#define LONG 25 // Equals ~400KHz
-#define SHORT 5
-
-//busy wait for the specified time
-void wait_ms(uint64_t ms) {
-  static const uint64_t ms_tick = RTC_FREQ/1000;
-  volatile uint64_t * mtime  = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME);
-  uint64_t then = (ms_tick * ms) + *mtime;
-  while(*mtime<then);
-}
-
-inline void delay_number_of_nop(uint32_t count)
-{
-  for(volatile uint32_t j = 0; j < count; j++)
-  {
-    asm("nop");
-  }
-}
-
-_Bool i2c_busy(void)
-{
-  GPIO_REG(GPIO_INPUT_EN) |= ((0x1 << SCL) | (0x1 << SDA));
-  GPIO_REG(GPIO_OUTPUT_EN)  &= ~((0x1 << SCL) | (0x1 << SDA));
-  return (GPIO_REG(GPIO_INPUT_VAL) & ((0x1 << SCL) | (0x1 << SDA))) != ((0x1 << SCL) | (0x1 << SDA));
-}
-
-void i2c_start(void)
-{
-  GPIO_REG(GPIO_INPUT_EN)  &=  ~((0x1 << SDA) | (0x1 << SCL));
-
-  GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SDA);
-  GPIO_REG(GPIO_OUTPUT_EN)  |=  (0x1 << SDA);
-  delay_number_of_nop(SHORT);
-  GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SCL);
-  GPIO_REG(GPIO_OUTPUT_EN)  |=  (0x1 << SCL);
-}
-
-void i2c_repeated_start(void)
-{
-  delay_number_of_nop(SHORT);
-  GPIO_REG(GPIO_OUTPUT_VAL) |=  (0x1 << SCL);
-  GPIO_REG(GPIO_OUTPUT_EN)  |=  (0x1 << SCL);
-  delay_number_of_nop(SHORT);
-  i2c_start();
-}
-
-
-void i2c_stop(void)
-{
-  GPIO_REG(GPIO_INPUT_EN) |= (0x1 << SCL);
-  GPIO_REG(GPIO_OUTPUT_EN)  &= ~(0x1 << SCL);
-  delay_number_of_nop(SHORT);
-  GPIO_REG(GPIO_INPUT_EN) |= (0x1 << SDA);
-  GPIO_REG(GPIO_OUTPUT_EN)  &= ~(0x1 << SDA);
-}
-
-void i2c_init(void)
-{
-  //GPIO_REG(GPIO_IOF_EN) &= ((0x1 << SCL) | (0x1 << SDA));
-  GPIO_REG(GPIO_OUTPUT_EN) &= ~((0x1 << SCL) | (0x1 << SDA));
-  GPIO_REG(GPIO_PULLUP_EN) |= ((0x1 << SDA) | (0x1 << SCL));
-  GPIO_REG(GPIO_INPUT_EN)  |=  (0x1 << SDA) | (0x1 << SCL);
-}
-
-void i2c_send_bytes_rs(uint8_t* data, uint8_t size, _Bool rs, uint8_t* data_r, uint8_t size_r)
-{
-  uint8_t address_r = data[0] | 0x01;
-
-  for(uint8_t ii=0; ii<size; ii++)
-  {
-    GPIO_REG(GPIO_INPUT_EN)  &= ~(0x1 << SDA);
-    GPIO_REG(GPIO_OUTPUT_EN) |=  (0x1 << SDA);
-    for(uint8_t i=0; i<9; i++)
-    {
-      delay_number_of_nop(SHORT);
-
-      if(i != 8)
-      {
-        if(data[ii] & 0x80)
-          GPIO_REG(GPIO_OUTPUT_VAL) |=  (0x1 << SDA);
-        else
-          GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SDA);
-      }
-      else
-      {
-        GPIO_REG(GPIO_INPUT_EN)  |=  (0x1 << SDA);
-        GPIO_REG(GPIO_OUTPUT_EN) &= ~(0x1 << SDA);
-        if((GPIO_REG(GPIO_INPUT_VAL) & (0x1 << SDA)) != 0x0)
-        {
-            printf("NO ACK\n");
-        }
-
-        GPIO_REG(GPIO_INPUT_EN)  &= ~(0x1 << SDA);
-        GPIO_REG(GPIO_OUTPUT_EN) |=  (0x1 << SDA);
-        if(rs == 0)
-        {
-          GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SDA);
-        }
-        else
-        {
-          GPIO_REG(GPIO_OUTPUT_VAL) |= (0x1 << SDA);
-        }
-
-      }
-      delay_number_of_nop(LONG-SHORT);
-
-      GPIO_REG(GPIO_OUTPUT_VAL) |= (0x1 << SCL);
-
-      delay_number_of_nop(LONG);
-
-      GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SCL);
-
-      data[ii] <<= 1;
-    }
-  }
-
-  if(rs == 0)
-    return;
-
-  GPIO_REG(GPIO_OUTPUT_VAL) |= (0x1 << SCL);
-
-  delay_number_of_nop(SHORT);
-
-  GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SDA);
-
-  delay_number_of_nop(SHORT);
-
-  GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SCL);
-
-  for(uint8_t i=0; i<9; i++)
-  {
-    delay_number_of_nop(SHORT);
-    if(i != 8)
-    {
-      if(address_r & 0x80)
-        GPIO_REG(GPIO_OUTPUT_VAL) |=  (0x1 << SDA);
-      else
-        GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SDA);
-    }
-    else
-    {
-      GPIO_REG(GPIO_INPUT_EN)  |=  (0x1 << SDA);
-      GPIO_REG(GPIO_OUTPUT_EN) &= ~(0x1 << SDA);
-      if((GPIO_REG(GPIO_INPUT_VAL) & (0x1 << SDA)) != 0x0)
-      {
-          printf("NO ACK\n");
-      }
-    }
-    delay_number_of_nop(LONG-SHORT);
-
-    GPIO_REG(GPIO_OUTPUT_VAL) |= (0x1 << SCL);
-
-    delay_number_of_nop(LONG);
-
-    GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SCL);
-
-    address_r <<= 1;
-  }
-
-  // Receive Data
-  for(uint8_t ii=0; ii<size_r; ii++)
-  {
-    for(uint8_t i=0; i<9; i++)
-    {
-      GPIO_REG(GPIO_OUTPUT_VAL) |= (0x1 << SCL);
-
-      if(i!=8)
-        data_r[ii] <<= 1;
-
-      delay_number_of_nop(SHORT);
-
-      if(i!=8)
-      {
-        if((GPIO_REG(GPIO_INPUT_VAL) & (0x1 << SDA)) != 0x0)
-        {
-          data_r[ii] |= 0x1;
-        }
-      }
-      else if(ii == (size_r-1))
-      {
-        GPIO_REG(GPIO_INPUT_EN)  &= ~(0x1 << SDA);
-        GPIO_REG(GPIO_OUTPUT_EN) |=  (0x1 << SDA);
-        GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SDA);
-      } else {
-
-      }
-
-      delay_number_of_nop(LONG-SHORT);
-
-      GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SCL);
-
-      if((i==7) && (ii != (size_r-1))){
-          GPIO_REG(GPIO_INPUT_EN)  &= ~(0x1 << SDA);
-          GPIO_REG(GPIO_OUTPUT_EN) |=  (0x1 << SDA);
-          GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SDA);
-      }
-      delay_number_of_nop(LONG);
-
-    }
-
-    if(ii != (size_r-1)){
-          GPIO_REG(GPIO_INPUT_EN)  |=  (0x1 << SDA);
-          GPIO_REG(GPIO_OUTPUT_EN) &= ~(0x1 << SDA);
-          delay_number_of_nop(SHORT);
-    }
-  }
-}
-
-void write_byte(uint8_t address, uint8_t reg_addr, uint8_t val)
-{
-  uint8_t temp[3];
-  uint8_t data;
-  temp[0]=address<<1;
-  temp[1]=reg_addr;
-  temp[2]=val;
-  while(i2c_busy());
-  i2c_start();
-  i2c_send_bytes_rs(temp, sizeof(temp), 0, &data, 1);
-  i2c_stop();
-}
-
-uint8_t read_byte(uint8_t address, uint8_t reg_addr)
-{
-  uint8_t temp[2];
-  uint8_t data;
-  temp[0]=address<<1;
-  temp[1]=reg_addr;
-  while(i2c_busy());
-  i2c_start();
-  i2c_send_bytes_rs(temp, sizeof(temp), 1, &data, 1);
-  i2c_stop();
-  return data;
-}
-
-void read_bytes(uint8_t address, uint8_t reg_addr, uint8_t* data, uint8_t size)
-{
-  uint8_t temp[2];
-  temp[0]=address<<1;
-  temp[1]=reg_addr;
-  while(i2c_busy());
-  i2c_start();
-  i2c_send_bytes_rs(temp, sizeof(temp), 1, data, size);
-  i2c_stop();
-}
-
-int main(int argc, char **argv)
-{
-  uint8_t data;
-  uint8_t accel[6];
-
-  printf("BIT-BANG I2C DEMO with MPU-6050 IMU\n");
-
-  i2c_init();
-
-  printf("Power Management 1: 0x%02X\n", read_byte(MPU6050_ADDR, MPU6050_RA_PWR_MGMT_1));
-  write_byte(MPU6050_ADDR, MPU6050_RA_PWR_MGMT_1, 0x80);
-
-  wait_ms(10);
-
-  printf("Power Management 1: 0x%02X\n", read_byte(MPU6050_ADDR, MPU6050_RA_PWR_MGMT_1));
-  write_byte(MPU6050_ADDR, MPU6050_RA_PWR_MGMT_1, 0x00);
-
-  printf("CHIP_ID: 0x%02X\n", read_byte(MPU6050_ADDR, MPU6050_RA_WHO_AM_I));
-  printf("DONE\n");
-
-  while(1)
-  {
-    //for(uint8_t i=0; i<6; i++){
-    //  accel[i]=read_byte(MPU6050_ADDR, 0x3B+i);
-    //}
-    read_bytes(MPU6050_ADDR, 0x3B, accel, 6);
-    int16_t x_accel = (accel[0]<<8)+accel[1];
-    int16_t y_accel = (accel[2]<<8)+accel[3];
-    int16_t z_accel = (accel[4]<<8)+accel[5];
-
-    float z_g = z_accel;
-    z_g = z_g/16384.0;
-    int32_t z_g_int = z_g*100;
-    z_g_int = abs(z_g_int);
-    printf("Gravity in Z %d.%d\n", z_g_int/100, z_g_int%100);
-
-    //printf("X: %06d, Y: %06d, Z: %06d\n", x_accel, y_accel, z_accel);
-
-    wait_ms(100);
-  }
-
-  return 0;
-}
diff --git a/software/led_fade/.unsupported-boards b/software/led_fade/.unsupported-boards
deleted file mode 100644
index f9e9897..0000000
--- a/software/led_fade/.unsupported-boards
+++ /dev/null
@@ -1,4 +0,0 @@
-freedom-e300-arty
-coreplexip-e31-arty
-coreplexip-e51-arty
-freedom-e300-arty
diff --git a/software/led_fade/Makefile b/software/led_fade/Makefile
deleted file mode 100644
index bbdba66..0000000
--- a/software/led_fade/Makefile
+++ /dev/null
@@ -1,6 +0,0 @@
-TARGET = led_fade
-C_SRCS += led_fade.c
-CFLAGS += -O2 -fno-builtin-printf -DNO_INIT
-
-BSP_BASE = ../../bsp
-include $(BSP_BASE)/env/common.mk
diff --git a/software/led_fade/led_fade.c b/software/led_fade/led_fade.c
deleted file mode 100644
index 9b50eda..0000000
--- a/software/led_fade/led_fade.c
+++ /dev/null
@@ -1,167 +0,0 @@
-// See LICENSE for license details.
-
-// This is the program which ships on the HiFive1
-// board, executing out of SPI Flash at 0x20400000.
-
-#include <stdint.h>
-#include "platform.h"
-
-#ifndef _SIFIVE_HIFIVE1_H
-#error "'led_fade' is designed to run on HiFive1 and/or E300 Arty Dev Kit."
-#endif
-
-static const char led_msg[] = "\a\n\r\n\r\
-55555555555555555555555555555555555555555555555\n\r\
-5555555 Are the LEDs Changing? [y/n]  555555555\n\r\
-55555555555555555555555555555555555555555555555\n\r";
-
-static const char sifive_msg[] = "\n\r\
-\n\r\
-                SIFIVE, INC.\n\r\
-\n\r\
-         5555555555555555555555555\n\r\
-        5555                   5555\n\r\
-       5555                     5555\n\r\
-      5555                       5555\n\r\
-     5555       5555555555555555555555\n\r\
-    5555       555555555555555555555555\n\r\
-   5555                             5555\n\r\
-  5555                               5555\n\r\
- 5555                                 5555\n\r\
-5555555555555555555555555555          55555\n\r\
- 55555           555555555           55555\n\r\
-   55555           55555           55555\n\r\
-     55555           5           55555\n\r\
-       55555                   55555\n\r\
-         55555               55555\n\r\
-           55555           55555\n\r\
-             55555       55555\n\r\
-               55555   55555\n\r\
-                 555555555\n\r\
-                   55555\n\r\
-                     5\n\r\
-\n\r\
-               'led_fade' Demo \n\r\
-\n\r";
-
-static void _putc(char c) {
-  while ((int32_t) UART0_REG(UART_REG_TXFIFO) < 0);
-  UART0_REG(UART_REG_TXFIFO) = c;
-}
-
-int _getc(char * c){
-  int32_t val = (int32_t) UART0_REG(UART_REG_RXFIFO);
-  if (val > 0) {
-    *c =  val & 0xFF;
-    return 1;
-  }
-  return 0;
-}
-
-
-static void _puts(const char * s) {
-  while (*s != '\0'){
-    _putc(*s++);
-  }
-}
-
-
-int main (void){
-
-  // Make sure the HFROSC is on before the next line:
-  PRCI_REG(PRCI_HFROSCCFG) |= ROSC_EN(1);
-  // Run off 16 MHz Crystal for accuracy. Note that the
-  // first line is 
-  PRCI_REG(PRCI_PLLCFG) = (PLL_REFSEL(1) | PLL_BYPASS(1));
-  PRCI_REG(PRCI_PLLCFG) |= (PLL_SEL(1));
-  // Turn off HFROSC to save power
-  PRCI_REG(PRCI_HFROSCCFG) &= ~(ROSC_EN(1));
-  
-  // Configure UART to print
-  GPIO_REG(GPIO_OUTPUT_VAL) |= IOF0_UART0_MASK;
-  GPIO_REG(GPIO_OUTPUT_EN)  |= IOF0_UART0_MASK;
-  GPIO_REG(GPIO_IOF_SEL)    &= ~IOF0_UART0_MASK;
-  GPIO_REG(GPIO_IOF_EN)     |= IOF0_UART0_MASK;
-
-  // 115200 Baud Rate
-  UART0_REG(UART_REG_DIV) = 138;
-  UART0_REG(UART_REG_TXCTRL) = UART_TXEN;
-  UART0_REG(UART_REG_RXCTRL) = UART_RXEN;
-
-  // Wait a bit to avoid corruption on the UART.
-  // (In some cases, switching to the IOF can lead
-  // to output glitches, so need to let the UART
-  // reciever time out and resynchronize to the real 
-  // start of the stream.
-  volatile int i=0;
-  while(i < 10000){i++;}
-
-  _puts(sifive_msg);
-  //_puts("Config String:\n\r");
-  //_puts(*((const char **) 0x100C));
-  //_puts("\n\r");
-  _puts(led_msg);
-  
-  uint16_t r=0xFF;
-  uint16_t g=0;
-  uint16_t b=0;
-  char c = 0;
-  
-  // Set up RGB PWM
-  
-  PWM1_REG(PWM_CFG)   = 0;
-  // To balance the power consumption, make one left, one right, and one center aligned.
-  PWM1_REG(PWM_CFG)   = (PWM_CFG_ENALWAYS) | (PWM_CFG_CMP2CENTER);
-  PWM1_REG(PWM_COUNT) = 0;
-  
-  // Period is approximately 244 Hz
-  // the LEDs are intentionally left somewhat dim, 
-  // as the full brightness can be painful to look at.
-  PWM1_REG(PWM_CMP0)  = 0;
-
-  GPIO_REG(GPIO_IOF_SEL)    |= ( (1 << GREEN_LED_OFFSET) | (1 << BLUE_LED_OFFSET) | (1 << RED_LED_OFFSET));
-  GPIO_REG(GPIO_IOF_EN )    |= ( (1 << GREEN_LED_OFFSET) | (1 << BLUE_LED_OFFSET) | (1 << RED_LED_OFFSET));
-  GPIO_REG(GPIO_OUTPUT_XOR) &= ~( (1 << GREEN_LED_OFFSET) | (1 << BLUE_LED_OFFSET));
-  GPIO_REG(GPIO_OUTPUT_XOR) |= (1 << RED_LED_OFFSET);
-
-  while(1){
-    volatile uint64_t *  now = (volatile uint64_t*)(CLINT_CTRL_ADDR + CLINT_MTIME);
-    volatile uint64_t then = *now + 100;
-    while (*now < then) { }
-  
-    if(r > 0 && b == 0){
-      r--;
-      g++;
-    }
-    if(g > 0 && r == 0){
-      g--;
-      b++;
-    }
-    if(b > 0 && g == 0){
-      r++;
-      b--;
-    }
-    
-    uint32_t G = g;
-    uint32_t R = r;
-    uint32_t B = b;
-    
-    PWM1_REG(PWM_CMP1)  = G << 4;            // PWM is low on the left, GPIO is low on the left side, LED is ON on the left.
-    PWM1_REG(PWM_CMP2)  = (B << 1) << 4;     // PWM is high on the middle, GPIO is low in the middle, LED is ON in the middle.
-    PWM1_REG(PWM_CMP3)  = 0xFFFF - (R << 4); // PWM is low on the left, GPIO is low on the right, LED is on on the right.
-  
-    // Check for user input
-    if (c == 0){
-      if (_getc(&c) != 0){
-        _putc(c);
-        _puts("\n\r");
-        
-        if ((c == 'y') || (c == 'Y')){
-          _puts("PASS\n\r");
-        } else{
-          _puts("FAIL\n\r");
-        }
-      }
-    }
-  }
-}
diff --git a/software/local_interrupts/.unsupported-boards b/software/local_interrupts/.unsupported-boards
deleted file mode 100644
index 33cea3a..0000000
--- a/software/local_interrupts/.unsupported-boards
+++ /dev/null
@@ -1,2 +0,0 @@
-freedom-e300-arty
-freedom-e300-hifive1
diff --git a/software/local_interrupts/Makefile b/software/local_interrupts/Makefile
deleted file mode 100644
index 4605ee9..0000000
--- a/software/local_interrupts/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-TARGET = local_interrupts
-CFLAGS += -O2 -fno-builtin-printf -DUSE_LOCAL_ISR
-
-BSP_BASE = ../../bsp
-
-C_SRCS += local_interrupts.c
-
-include $(BSP_BASE)/env/common.mk
diff --git a/software/local_interrupts/local_interrupts.c b/software/local_interrupts/local_interrupts.c
deleted file mode 100644
index cc9bfe7..0000000
--- a/software/local_interrupts/local_interrupts.c
+++ /dev/null
@@ -1,216 +0,0 @@
-// See LICENSE for license details.
-
-#include <stdio.h>
-#include <stdlib.h>
-#include "platform.h"
-#include <string.h>
-#include "encoding.h"
-#include <unistd.h>
-
-#ifndef _SIFIVE_COREPLEXIP_ARTY_H
-#error 'local_interrupts' demo only supported for Coreplex IP Eval Kits
-#endif
-
-// Global Variable used to show
-// software interrupts.
-volatile uint32_t g_debouncing;
-
-void debounce();
-
-// Structures for registering different interrupt handlers
-// for different parts of the application.
-typedef void (*interrupt_function_ptr_t) (void);
-
-// This function enables some of the local interrupts sources
-// used in this demo -- just those for the buttons and
-// Switch 3.
-
-void enable_local_interrupts(){
-
-  // lowest priority
-  set_csr(mie, MIP_MLIP(LOCAL_INT_SW_3 ));
-  set_csr(mie, MIP_MLIP(LOCAL_INT_BTN_0));
-  set_csr(mie, MIP_MLIP(LOCAL_INT_BTN_1));
-  set_csr(mie, MIP_MLIP(LOCAL_INT_BTN_2));
-  set_csr(mie, MIP_MLIP(LOCAL_INT_BTN_3));
-  // highest priority
-  
-}
-
-void disable_local_interrupts() {
-
-  // lowest priority
-  clear_csr(mie, MIP_MLIP(LOCAL_INT_SW_3 ));
-  clear_csr(mie, MIP_MLIP(LOCAL_INT_BTN_0));
-  clear_csr(mie, MIP_MLIP(LOCAL_INT_BTN_1));
-  clear_csr(mie, MIP_MLIP(LOCAL_INT_BTN_2));
-  clear_csr(mie, MIP_MLIP(LOCAL_INT_BTN_3));
-  // highest priority
-
-}
-
-/*Entry Point for Machine Software Interrupt Handler*/
-void msi_isr() {
-
-  const char msi_msg[] = "    Debouncing: (this message due to Software Interrupt))\n\n";
-  write (STDOUT_FILENO, msi_msg, strlen(msi_msg));  
-
-  //clear the  SW interrupt
-  CLINT_REG(CLINT_MSIP) = 0;
-
-}
-
-/*Entry Point for Machine Timer Interrupt Handler*/
-void mti_isr(){
-
-  // Disable the timer interrupt. The Debounce logic sets it.
-  clear_csr(mie, MIP_MTIP);
-
-  // Enable all the local interrupts
-  enable_local_interrupts();
-}
-
-
-const char * instructions_msg = " \
-\n\
-                         SiFive, Inc\n\
- E31/E51 Coreplex IP Eval Kit 'local_interrupts' demo.\n\
-\n\
-The Buttons 0-3 and Switch 3 are enabled as local\n\
-interrupts sources. A .5 s 'debounce' timer is used \n\
-between these interrupts. Software interrupts are\n\
-used to print a message while debouncing.\n\
-Note the priority of the interrupts sources.\n\
-\n";
-
-void print_instructions() {
-
-  write (STDERR_FILENO, instructions_msg, strlen(instructions_msg));
-
-}
-
-void button_0_isr(void) {
-
-  // Toggle Red LED
-  const char button_0_msg[] = "Button 0 was pressed. Toggle Red.\n";
-  write (STDOUT_FILENO, button_0_msg, strlen(button_0_msg));  
-  GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << RED_LED_OFFSET);
-  debounce();  
-};
-
-void button_1_isr(void) {
-
-  // Toggle Green LED
-  const char button_1_msg[] = "Button 1 was pressed. Toggle Green.\n";
-  write (STDOUT_FILENO, button_1_msg, strlen(button_1_msg));  
-  GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << GREEN_LED_OFFSET);
-  debounce();
-};
-
-
-void button_2_isr(void) {
-
-  // Toggle Blue LED
-  const char button_2_msg[] = "Button 2 was pressed. Toggle Blue.\n";
-  write (STDOUT_FILENO, button_2_msg, strlen(button_2_msg));  
-  GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << BLUE_LED_OFFSET);
-  debounce();
-  
-};
-
-void button_3_isr(void) {
-  const char button_3_msg[] = "Button 3 was pressed! (No LEDs change).\n";
-  write (STDOUT_FILENO, button_3_msg, strlen(button_3_msg));
-  debounce();
-}
-
-void switch_3_isr(void) {
-  const char sw_3_msg[] = "Switch 3 is on! But buttons have higher priority.\n";
-  write (STDOUT_FILENO, sw_3_msg, strlen(sw_3_msg));
-  debounce();
-}
-
-void debounce(int local_interrupt_num) {
-
-  // Disable the most recent interrupt.
-  // Don't enable it again until the timer goes off,
-  // in .5 second.
-  
-  // Set the machine timer to go off in .5 seconds.
-  // If the timer was already set to go off, this "cancels"
-  // the current one.
-  
-  volatile uint64_t * mtime       = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME);
-  volatile uint64_t * mtimecmp    = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIMECMP);
-  uint64_t now = *mtime;
-  uint64_t then = now + .5*RTC_FREQ;
-  *mtimecmp = then;
-
-  disable_local_interrupts();
-  g_debouncing = 1;
-
-  // Enable the Machine-Timer bit in MIE
-  set_csr(mie, MIP_MTIP);
-  
-}
-
-// See bsp/env/<BOARD>/init.c for how this
-// interrupt vector is used.
-
-interrupt_function_ptr_t localISR[32]; 
-
-int main(int argc, char **argv)
-{
-  
-  // Configure LEDs as outputs.
-  GPIO_REG(GPIO_INPUT_EN)    &= ~((0x1<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET) | (0x1 << BLUE_LED_OFFSET)) ;
-  GPIO_REG(GPIO_OUTPUT_EN)   |=  ((0x1<< RED_LED_OFFSET)| (0x1<< GREEN_LED_OFFSET) | (0x1 << BLUE_LED_OFFSET)) ;
-  GPIO_REG(GPIO_OUTPUT_VAL)  |=   (0x1 << BLUE_LED_OFFSET) ;
-  GPIO_REG(GPIO_OUTPUT_VAL)  &=  ~((0x1<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET)) ;
-
-  // The Buttons and Switches which are used as local interrupt sources
-  // do not go through the GPIO peripheral, so they do not need to
-  // be configured as inputs.
-  
-  // Disable the timer & local interrupts until setup is done (they're
-  // not reset by default)
-  
-  // Disable all interrupts. MIE is not reset.
-  write_csr(mie, 0);
-
-  for (int isr = 0; isr < 32; isr++){
-    localISR[isr] = 0;
-  }
-  
-  localISR[IRQ_M_SOFT]  = msi_isr;
-  localISR[IRQ_M_TIMER] = mti_isr;
-  localISR[IRQ_M_LOCAL + LOCAL_INT_SW_3]  = switch_3_isr;
-  localISR[IRQ_M_LOCAL + LOCAL_INT_BTN_0] = button_0_isr;
-  localISR[IRQ_M_LOCAL + LOCAL_INT_BTN_1] = button_1_isr;
-  localISR[IRQ_M_LOCAL + LOCAL_INT_BTN_2] = button_2_isr;
-  localISR[IRQ_M_LOCAL + LOCAL_INT_BTN_3] = button_3_isr;
-
-  print_instructions();
-  
-  enable_local_interrupts();
-
-  g_debouncing = 0;
-
-  // Enable SW interrupts as well in this demo.
-  set_csr(mie, MIP_MSIP);
-  
-  // Enable all global interrupts
-  set_csr(mstatus, MSTATUS_MIE);
-
-  volatile int foo = 1;
-  while(foo){
-    if (g_debouncing){
-      //Trigger a SW interrupt
-      CLINT_REG(CLINT_MSIP) = 1;
-      g_debouncing = 0;
-    }
-  }
-
-  return 0;
-
-}
diff --git a/software/performance_counters/Makefile b/software/performance_counters/Makefile
deleted file mode 100644
index eb3e8f1..0000000
--- a/software/performance_counters/Makefile
+++ /dev/null
@@ -1,6 +0,0 @@
-TARGET = performance_counters
-C_SRCS += performance_counters.c
-CFLAGS += -O2 -fno-builtin-printf
-
-BSP_BASE = ../../bsp
-include $(BSP_BASE)/env/common.mk
diff --git a/software/performance_counters/performance_counters.c b/software/performance_counters/performance_counters.c
deleted file mode 100644
index 8094128..0000000
--- a/software/performance_counters/performance_counters.c
+++ /dev/null
@@ -1,133 +0,0 @@
-// See LICENSE for license details.
-
-// This demo shows how to use basic
-// RISC-V profiling counters, mcycle
-// (counts the number of processor cycles)
-// and minstret (counts the number of retired instructions). 
-// Note that both are writable as well.
-
-#include <stdio.h>
-
-// The CSR encodings are in this header.
-#include "encoding.h"
-
-// The mcycle counter is 64-bit counter, but since
-// Freedom E platforms use RV32, we must access it as
-// 2 32-bit registers. At 256MHz, the lower bits will
-// roll over approx. every 5 seconds, so we check for
-// rollover with this routine as suggested by the
-// RISC-V Priviledged Architecture Specification.
-
-#if __riscv_xlen == 64
-#define rdmcycle(x)  {					\
-    uint64_t hi;					\
-    __asm__ __volatile__ ("1:\n\t"			\
-			  "csrr %0, mcycle\n\t"		\
-			  : "=r" (hi)) ;		\
-    *(x) = hi;		 				\
-  }
-#else
-#define rdmcycle(x)  {				       \
-    uint32_t lo, hi, hi2;			       \
-    __asm__ __volatile__ ("1:\n\t"		       \
-			  "csrr %0, mcycleh\n\t"       \
-			  "csrr %1, mcycle\n\t"	       \
-			  "csrr %2, mcycleh\n\t"       \
-			  "bne  %0, %2, 1b\n\t"			\
-			  : "=r" (hi), "=r" (lo), "=r" (hi2)) ;	\
-    *(x) = lo | ((uint64_t) hi << 32); 				\
-  }
-#endif
-
-
-// The minstret counter is 64-bit counter, but
-// Freedom E platforms use RV32, we must access it as
-// 2 32-bit registers, same as for mcycle.
-
-#if __riscv_xlen == 64
-#define rdminstret(x)  {				\
-    uint64_t hi;					\
-    __asm__ __volatile__ ("1:\n\t"			\
-			  "csrr %0, minstret\n\t"	\
-			  : "=r" (hi)) ;		\
-    *(x) = hi;						\
-  }
-#else
-#define rdminstret(x)  {			       \
-    uint32_t lo, hi, hi2;			       \
-    __asm__ __volatile__ ("1:\n\t"		       \
-			  "csrr %0, minstreth\n\t"       \
-			  "csrr %1, minstret\n\t"	       \
-			  "csrr %2, minstreth\n\t"       \
-			  "bne  %0, %2, 1b\n\t"			\
-			  : "=r" (hi), "=r" (lo), "=r" (hi2)) ;	\
-    *(x) = lo | ((uint64_t) hi << 32); 				\
-  }
-#endif
-
-// Simple program to measure the performance of.
-
-int factorial(int i){
-
-  int result = 1;
-  for (int ii = 1; ii <= i; ii++) {
-    result = result * i;
-  }
-
-  return result;
-  
-}
-
-
-int main()
-{
-
-  uint64_t before_cycle;
-  uint64_t before_instret;
-  
-  uint64_t after_cycle;
-  uint64_t after_instret;
-    
-  printf("\n\nDemo 1: Using Counter Differences.\n");
-  
-  for (int ii = 0; ii < 3; ii++){
-    rdmcycle(&before_cycle);
-    rdminstret(&before_instret);
-
-    volatile int result = factorial (100);
-    
-    rdmcycle(&after_cycle);
-    rdminstret(&after_instret);
-    
-    printf("Loop %d: Retired %d instructions in %d cycles\n",
-	   ii,
-	   (uint32_t)(after_instret - before_instret), 
-	   (uint32_t)(after_cycle - before_cycle));
-  }
-
-  printf("\n\nDemo 2: Clearing Counters, Using Values Directly.\n");
-
-  for (int ii = 0; ii < 3; ii++){
-
-    write_csr(mcycle,  0);
-    write_csr(minstret, 0);
-#if __riscv_xlen == 32
-    write_csr(mcycleh, 0);
-    write_csr(minstreth, 0);
-#endif
-    
-    volatile int result = factorial (100);
-    
-    rdmcycle(&after_cycle);
-    rdminstret(&after_instret);
-    
-    printf("Loop %d: Retired %d instructions in %d cycles\n",
-	   ii,
-	   (uint32_t)(after_instret),
-	   (uint32_t)(after_cycle));
-
-  }
-
-  return 0;
-
-}
diff --git a/software/smp/Makefile b/software/smp/Makefile
deleted file mode 100644
index 4131ffc..0000000
--- a/software/smp/Makefile
+++ /dev/null
@@ -1,6 +0,0 @@
-TARGET = smp
-C_SRCS += smp.c
-CFLAGS += -O2 -fno-builtin-printf -DENABLE_SMP
-
-BSP_BASE = ../../bsp
-include $(BSP_BASE)/env/common.mk
diff --git a/software/smp/atomic.h b/software/smp/atomic.h
deleted file mode 100644
index 074c6a2..0000000
--- a/software/smp/atomic.h
+++ /dev/null
@@ -1,29 +0,0 @@
-#ifndef SIFIVE_ATOMIC_H
-#define SIFIVE_ATOMIC_H
-
-#define ATOMIC_INIT(x)		\
-	{			\
-		.counter = (x),	\
-	}
-
-typedef struct {
-  int counter;
-} atomic_t;
-
-static inline int atomic_xchg(atomic_t *v, int n)
-{
-  register int c;
-
-  __asm__ __volatile__ (
-    "amoswap.w.aqrl %0, %2, %1"
-    : "=r" (c), "+A" (v->counter)
-    : "r" (n));
-  return c;
-}
-
-static inline void mb(void)
-{
-  __asm__ __volatile__ ("fence");
-}
-
-#endif
diff --git a/software/smp/smp.c b/software/smp/smp.c
deleted file mode 100644
index 36c9db9..0000000
--- a/software/smp/smp.c
+++ /dev/null
@@ -1,40 +0,0 @@
-#include <stdio.h>
-#include <unistd.h>
-#include "atomic.h"
-void write_hex(int, unsigned long);
-
-atomic_t tty_lock = ATOMIC_INIT(0);
-
-void get_lock(atomic_t *lock)
-{
-  while (atomic_xchg(lock, 1) == 1);
-  mb();
-}
-
-void put_lock(atomic_t *lock)
-{
-  mb();
-  atomic_xchg(lock, 0);
-}
-
-int secondary_main(int hartid)
-{
-  volatile int counter;
-
-  while (1) {
-    get_lock(&tty_lock);
-    write(1, "hello world from hart ", 22);
-    char s[] = {'0', '\n', '\0'};
-    s[0] += hartid;
-    write(1, s, 2);
-    put_lock(&tty_lock);
-
-    for (counter = 0; counter < 10000 + 100*hartid; ++counter)
-        mb();
-  }
-}
-
-int main()
-{
-  return secondary_main(0);
-}
diff --git a/software/vectored_interrupts/Makefile b/software/vectored_interrupts/Makefile
deleted file mode 100644
index 4365038..0000000
--- a/software/vectored_interrupts/Makefile
+++ /dev/null
@@ -1,10 +0,0 @@
-TARGET = vectored_interrupts
-CFLAGS += -O2 -fno-builtin-printf -DVECT_IRQ
-
-BSP_BASE = ../../bsp
-
-ASM_SRCS += $(ENV_DIR)/ventry.S
-C_SRCS += vectored_interrupts.c
-C_SRCS += $(BSP_BASE)/drivers/plic/plic_driver.c
-
-include $(BSP_BASE)/env/common.mk
diff --git a/software/vectored_interrupts/vectored_interrupts.c b/software/vectored_interrupts/vectored_interrupts.c
deleted file mode 100644
index cb6a864..0000000
--- a/software/vectored_interrupts/vectored_interrupts.c
+++ /dev/null
@@ -1,270 +0,0 @@
-// See LICENSE for license details.
-
-#include <stdio.h>
-#include <stdlib.h>
-#include "platform.h"
-#include <string.h>
-#include "plic/plic_driver.h"
-#include "encoding.h"
-#include <unistd.h>
-
-#ifndef _SIFIVE_COREPLEXIP_ARTY_H
-#error 'global_interrupts' demo only supported for Coreplex IP Eval Kits
-#endif
-
-// Global Instance data for the PLIC
-// for use by the PLIC Driver.
-plic_instance_t g_plic;
-
-// Structures for registering different interrupt handlers
-// for different parts of the application.
-typedef void (*interrupt_function_ptr_t) (void);
-//array of function pointers which contains the PLIC
-//interrupt handlers
-interrupt_function_ptr_t g_ext_interrupt_handlers[PLIC_NUM_INTERRUPTS];
-
-//ecall countdown
-uint32_t ecall_countdown;
-//ecall macro used to store argument in a0
-#define ECALL(arg) ({			\
-	register uintptr_t a0 asm ("a0") = (uintptr_t)(arg);	\
-	asm volatile ("ecall"					\
-		      : "+r" (a0)				\
-		      : 	\
-		      : "memory");				\
-	a0;							\
-})
-
-
-const char * instructions_msg = " \
-\n\
-                SIFIVE, INC.\n\
-E31/E51 Coreplex IP Eval Kit 'vectored_interrupts' demo.  \n\
-\n\
-This demo demonstrates Vectored Interrupts capabilities of\n\
-the E31/E51 Coreplex. The vector table is defined in      \n\
-bsp/env/ventry.S                                          \n\
-Button 0 is a global external interrupt routed to the PLIC.\n\
-Button 1 is a local interrupt.\n\
-Every 10 seconds, an ECALL is made. \n\
-\n";
-
-void print_instructions() {
-
-  write (STDOUT_FILENO, instructions_msg, strlen(instructions_msg));
-
-}
-
-void set_timer() {
-  static uint64_t then = 0;
-  
-  volatile uint64_t * mtime       = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME);
-  volatile uint64_t * mtimecmp    = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIMECMP);
-  if(then != 0)  {
-    //next timer irq is 1 second from previous
-    then += 1*RTC_FREQ;
-  } else{ //first time setting the timer
-    uint64_t now = *mtime;
-    then = now + 1*RTC_FREQ;
-  }
-  *mtimecmp = then;
-
-  set_csr(mie, MIP_MTIP);
-}
-
-/*Entry Point for Machine Timer Interrupt Handler*/
-/*called from bsp/env/ventry.s          */
-void handle_m_time_interrupt(){
-  static uint32_t onoff=1;
-
-  clear_csr(mie, MIP_MTIP);
-
-  //increment ecall_countdown
-  ecall_countdown++;
-
-  // Set Green LED
-  if(onoff)	{
-	  GPIO_REG(GPIO_OUTPUT_VAL)  |=  (0x1 << GREEN_LED_OFFSET) ;
-	  onoff=0;
-  }else	{
-	  GPIO_REG(GPIO_OUTPUT_VAL)  &=  ~((0x1 << GREEN_LED_OFFSET)) ;
-	  onoff=1;
-  }
-
-  set_timer();
-  //re-enable button1 irq
-  set_csr(mie, MIP_MLIP(LOCAL_INT_BTN_1));
-
-}
-
-/*Synchronous Trap Handler*/
-/*called from bsp/env/ventry.s          */
-void handle_sync_trap(uint32_t arg0) {
-  uint32_t exception_code = read_csr(mcause);
-
-  //check for machine mode ecall
-  if(exception_code == CAUSE_MACHINE_ECALL)  {
-    //reset ecall_countdown
-    ecall_countdown = 0;
-
-    //ecall argument is stored in a0 prior to
-    //ECALL instruction.
-    printf("ecall from M-mode: %d\n",arg0);
-    
-    //on exceptions, mepc points to the instruction
-    //which triggered the exception, in order to
-    //return to the next instruction, increment
-    //mepc
-    unsigned long epc = read_csr(mepc);
-    epc += 4; //return to next instruction
-    write_csr(mepc, epc);
-    
-  } else{  
-    printf("vUnhandled Trap:\n");
-    _exit(1 + read_csr(mcause));
-  }
-}
-
-/*Entry Point for PLIC Interrupt Handler*/
-/*called from bsp/env/ventry.s          */
-void handle_m_external_interrupt(){
-  printf("In PLIC handler\n");
-  plic_source int_num  = PLIC_claim_interrupt(&g_plic);
-  if ((int_num >=1 ) && (int_num < PLIC_NUM_INTERRUPTS)) {
-    g_ext_interrupt_handlers[int_num]();
-  }
-  else {
-    exit(1 + (uintptr_t) int_num);
-  }
-  PLIC_complete_interrupt(&g_plic, int_num);
-}
-
-//default empty PLIC handler
-void invalid_global_isr() {
-  printf("Unexpected global interrupt!\n");
-}
-
-/* b0 global interrupt isr                */
-/*called from handle_m_external_interrupt */
-void button_0_handler() {
-  static uint32_t onoff=1;
-  // Set Green LED
-
-  printf("In Button 0 handler\n");
-
-  if(onoff)	{
-	  GPIO_REG(GPIO_OUTPUT_VAL)  |=  (0x1 << BLUE_LED_OFFSET) ;
-	  onoff=0;
-  }else	{
-	  GPIO_REG(GPIO_OUTPUT_VAL)  &=  ~((0x1 << BLUE_LED_OFFSET)) ;
-	  onoff=1;
-  }
-
-  //clear irq - interrupt pending register is write 1 to clear
-  GPIO_REG(GPIO_FALL_IP) |= (1<<BUTTON_0_OFFSET);
-}
-
-/*b1 local vectored irq handler         */
-/*called from bsp/env/ventry.s          */
-void handle_local_interrupt5() {
-  static uint32_t onoff=1;
-  // Set Green LED
-
-  printf("In Button 1 handler\n");
-
-  if(onoff)	{
-	  GPIO_REG(GPIO_OUTPUT_VAL)  |=  (0x1 << RED_LED_OFFSET) ;
-	  onoff=0;
-  }else	{
-	  GPIO_REG(GPIO_OUTPUT_VAL)  &=  ~((0x1 << RED_LED_OFFSET)) ;
-	  onoff=1;
-  }
-
-  //debounce by turning off until next timer tick
-  clear_csr(mie, MIP_MLIP(LOCAL_INT_BTN_1));
-}
-
-/*configures Button0 as a global gpio irq*/
-void b0_irq_init()  {
-
-    //dissable hw io function
-    GPIO_REG(GPIO_IOF_EN )    &=  ~(1 << BUTTON_0_OFFSET);
-
-    //set to input
-    GPIO_REG(GPIO_INPUT_EN)   |= (1<<BUTTON_0_OFFSET);
-    GPIO_REG(GPIO_PULLUP_EN)  |= (1<<BUTTON_0_OFFSET);
-
-    //set to interrupt on falling edge
-    GPIO_REG(GPIO_FALL_IE)    |= (1<<BUTTON_0_OFFSET);
-
-    PLIC_init(&g_plic,
-  	    PLIC_CTRL_ADDR,
-  	    PLIC_NUM_INTERRUPTS,
-  	    PLIC_NUM_PRIORITIES);
-
-    PLIC_enable_interrupt (&g_plic, INT_DEVICE_BUTTON_0);
-    PLIC_set_priority(&g_plic, INT_DEVICE_BUTTON_0, 2);
-    g_ext_interrupt_handlers[INT_DEVICE_BUTTON_0] = button_0_handler;
-}
-
-/*configures Button1 as a local interrupt*/
-void b1_irq_init()  {
-
-    //enable the interrupt
-    set_csr(mie, MIP_MLIP(LOCAL_INT_BTN_1));
-
-}
-
-/*turn down the brightness, and configure GPIO */
-void led_init() {
-  // Make sure people aren't blinded by LEDs connected here.
-  PWM0_REG(PWM_CMP0)  = 0xFE;
-  PWM0_REG(PWM_CMP1)  = 0xFF;
-  PWM0_REG(PWM_CMP2)  = 0xFF;
-  PWM0_REG(PWM_CMP3)  = 0xFF;
-  // Set up RGB LEDs for a visual.
-  GPIO_REG(GPIO_OUTPUT_EN)   |=  ((0x1<< RED_LED_OFFSET)| (0x1<< GREEN_LED_OFFSET)| (0x1<< BLUE_LED_OFFSET));
-  GPIO_REG(GPIO_OUTPUT_VAL)  &=  ~((0x1<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET) | (0x1<< BLUE_LED_OFFSET));
-
-}
-
-int main(int argc, char **argv)
-{
-  uint32_t ecall_count = 0;
-
-  //setup default global interrupt handler
-  for (int gisr = 0; gisr < PLIC_NUM_INTERRUPTS; gisr++){
-    g_ext_interrupt_handlers[PLIC_NUM_INTERRUPTS] = invalid_global_isr;
-  }
-  
-  print_instructions();
-  
-  led_init();
-  b0_irq_init();
-  b1_irq_init();
-
-  //initialize ecall_countdown
-  ecall_countdown = 0;
-
-  // Set up machine timer interrupt.
-  set_timer();
-
-  // Enable Global (PLIC) interrupts.
-  set_csr(mie, MIP_MEIP);
-  
-  // Enable all interrupts
-  set_csr(mstatus, MSTATUS_MIE);
-
-
-  while(1){    
-    asm volatile ("wfi");
-    //check if ecall_countdown is 10
-    if(ecall_countdown == 10) {
-      ECALL(ecall_count++);
-    }
-    //otherwise wfi
-  }
-  
-  return 0;
-
-}
diff --git a/software/watchdog/.gitignore b/software/watchdog/.gitignore
deleted file mode 100644
index 35566c7..0000000
--- a/software/watchdog/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-demo_gpio
diff --git a/software/watchdog/.unsupported-boards b/software/watchdog/.unsupported-boards
deleted file mode 100644
index 1e65df5..0000000
--- a/software/watchdog/.unsupported-boards
+++ /dev/null
@@ -1 +0,0 @@
-coreplexip-e51-arty
diff --git a/software/watchdog/Makefile b/software/watchdog/Makefile
deleted file mode 100644
index f614a4e..0000000
--- a/software/watchdog/Makefile
+++ /dev/null
@@ -1,9 +0,0 @@
-TARGET = watchdog
-CFLAGS += -O2 -fno-builtin-printf -DUSE_PLIC -DUSE_M_TIME
-
-BSP_BASE = ../../bsp
-
-C_SRCS += watchdog.c
-C_SRCS += $(BSP_BASE)/drivers/plic/plic_driver.c
-
-include $(BSP_BASE)/env/common.mk
diff --git a/software/watchdog/watchdog.c b/software/watchdog/watchdog.c
deleted file mode 100644
index 672ed68..0000000
--- a/software/watchdog/watchdog.c
+++ /dev/null
@@ -1,221 +0,0 @@
-// See LICENSE for license details.
-
-#include <stdio.h>
-#include <stdlib.h>
-#include "platform.h"
-#include <string.h>
-#include "plic/plic_driver.h"
-#include "encoding.h"
-#include <unistd.h>
-#include "stdatomic.h"
-
-void reset_demo (void);
-
-// Structures for registering different interrupt handlers
-// for different parts of the application.
-typedef void (*function_ptr_t) (void);
-void no_interrupt_handler (void) {};
-function_ptr_t g_ext_interrupt_handlers[PLIC_NUM_INTERRUPTS];
-
-
-// Instance data for the PLIC.
-plic_instance_t g_plic;
-
-
-/**
-* use mtime to wait for a specified number of ticks.
-* async determins if this is a busy wait, or if
-* an irq is scheduled
-*/
-void mtime_wait( uint64_t ticks, uint32_t async)
-{
-
-    volatile uint64_t * mtime  = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME);
-    uint64_t now = *mtime;
-    
-    //if async, schedule irq
-    if(async) {
-      volatile uint64_t * mtimecmp = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIMECMP);
-      uint64_t then = now + ticks; 
-      *mtimecmp = then;
-      set_csr(mie, MIP_MTIP);
-
-    } else  {
-      //else busy wait
-      uint64_t then = now + ticks;
-      while(*mtime<then) {}
-
-    }
-
-}
-
-/*Entry Point for PLIC Interrupt Handler*/
-void handle_m_ext_interrupt(){
-  plic_source int_num  = PLIC_claim_interrupt(&g_plic);
-  if ((int_num >=1 ) && (int_num < PLIC_NUM_INTERRUPTS)) {
-    g_ext_interrupt_handlers[int_num]();
-  }
-  else {
-    exit(1 + (uintptr_t) int_num);
-  }
-  PLIC_complete_interrupt(&g_plic, int_num);
-}
-
-//global countdown timer
-static uint32_t countdown = 10;
-/*Entry Point for Machine Timer Interrupt Handler*/
-void handle_m_time_interrupt(){
-
-  //cleare the timer irq
-  clear_csr(mie, MIP_MTIP);
-
-  //schedule next timer irq for 1 second
-  mtime_wait(1*RTC_FREQ, 1);
-
-  //flash a led
-  GPIO_REG(GPIO_OUTPUT_VAL) ^=	(0x1 << BLUE_LED_OFFSET);
-  
-  //print the count
-  printf("watchdog reset in %d\n", countdown--);
-}
-
-
-const char * instructions_msg = " \
-\n\
-                SIFIVE, INC.\n\
-\n\
-         5555555555555555555555555\n\
-        5555                   5555\n\
-       5555                     5555\n\
-      5555                       5555\n\
-     5555       5555555555555555555555\n\
-    5555       555555555555555555555555\n\
-   5555                             5555\n\
-  5555                               5555\n\
- 5555                                 5555\n\
-5555555555555555555555555555          55555\n\
- 55555           555555555           55555\n\
-   55555           55555           55555\n\
-     55555           5           55555\n\
-       55555                   55555\n\
-         55555               55555\n\
-           55555           55555\n\
-             55555       55555\n\
-               55555   55555\n\
-                 555555555\n\
-                   55555\n\
-                     5\n\
-\n\
-This application demonstrates the functionality of\n\
-the watchdog timer present in the HiFive1 AON peripheral.\n\
-\n\
-The Watchdog timer will expire in 10 seconds resulting in\n\
-a software reset.\n\
-\n\
-Press a key to prevent a reset\n\
-";
-
-void print_instructions() {
-
-  write (STDOUT_FILENO, instructions_msg, strlen(instructions_msg));
-
-}
-
-
-/**
-* Flash the red led for a second, then set up
-* blue for blinking during mtime irq
-*/
-void led_init() {
-
-
-  // Set up the GPIOs such that the LED GPIO
-  // can be used as both Inputs and Outputs.
-  GPIO_REG(GPIO_INPUT_EN)    &= ~((0x1<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET) | (0x1 << BLUE_LED_OFFSET)) ;
-  GPIO_REG(GPIO_OUTPUT_EN)   |=  ((0x1<< RED_LED_OFFSET)| (0x1<< GREEN_LED_OFFSET)| (0x1<< BLUE_LED_OFFSET));
-  GPIO_REG(GPIO_OUTPUT_VAL)  |=  ((0x1<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET) | (0x1<< BLUE_LED_OFFSET));
-
-  //flash red led to indicate reset
-  GPIO_REG(GPIO_OUTPUT_VAL)  &=   ~(0x1 << RED_LED_OFFSET) ;
-  mtime_wait(1*RTC_FREQ,0);
-  GPIO_REG(GPIO_OUTPUT_VAL)  |=   (0x1 << RED_LED_OFFSET) ;
-}
-
-/**
-* initialize the watchdog to reset in
-* 5 seconds
-**/
-void watchdog_init()  {
-
-
-//reset in 10 seconds
-AON_REG(AON_WDOGKEY) = AON_WDOGKEY_VALUE;
-AON_REG(AON_WDOGCMP) = 11;
-//wdogconfig: : wdogrsten | enablealways | reset to 0 | max scale
-AON_REG(AON_WDOGKEY) = AON_WDOGKEY_VALUE;
-AON_REG(AON_WDOGCFG) |= (AON_WDOGCFG_RSTEN | AON_WDOGCFG_ENALWAYS |\
-                        AON_WDOGCFG_ZEROCMP | AON_WDOGCFG_SCALE) ;
-
-}
-
-void reset_demo ()  {
-
-  // Disable the machine & timer interrupts until setup is done.
-  clear_csr(mie, MIP_MEIP);
-  clear_csr(mie, MIP_MTIP);
-
-  //enable uart input
-  UART0_REG(UART_REG_RXCTRL) = UART_RXEN;
-
-  /**************************************************************************
-   * Set up the PLIC
-   *************************************************************************/
-  PLIC_init(&g_plic,
-	    PLIC_CTRL_ADDR,
-	    PLIC_NUM_INTERRUPTS,
-	    PLIC_NUM_PRIORITIES);
-
-  for (int ii = 0; ii < PLIC_NUM_INTERRUPTS; ii ++){
-    g_ext_interrupt_handlers[ii] = no_interrupt_handler;
-  }
-
-
-  led_init();
-  print_instructions();
-  watchdog_init();
-  
-  // Enable the Machine-External bit in MIE
-  set_csr(mie, MIP_MEIP);
-  // Enable interrupts in general.
-  set_csr(mstatus, MSTATUS_MIE);
-}
-
-int main(int argc, char **argv)
-{
-
-  reset_demo();
-  //schedule a 1 second timer 
-  mtime_wait(1*RTC_FREQ,1);
-
- 
-  while (1){
-    char c;
-    if(((int32_t) UART0_REG(UART_REG_RXFIFO)) > 0){
-        //flash green led to indicate Kick
-        GPIO_REG(GPIO_OUTPUT_VAL)  &=   ~(0x1 << GREEN_LED_OFFSET) ;  
-
-        printf("Feeding Watchdog.\nHiFive1 will reset in 10 seconds.\n");
-        countdown = 10;
-        AON_REG(AON_WDOGKEY) = AON_WDOGKEY_VALUE;
-        AON_REG(AON_WDOGFEED) = AON_WDOGFEED_VALUE;
-
-        //busy wait a bit so the user sees the led blink
-        mtime_wait(5000, 0);
-        //turn off led
-        GPIO_REG(GPIO_OUTPUT_VAL)  |=   (0x1 << GREEN_LED_OFFSET) ;
-    }
-  }
-
-  return 0;
-
-}