Remove legacy examples

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

2 files changed, 0 insertions, 280 deletions

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;
-
-}