diff options
Diffstat (limited to 'bsp/env/coreplexip-e31-arty/init.c')
-rw-r--r-- | bsp/env/coreplexip-e31-arty/init.c | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/bsp/env/coreplexip-e31-arty/init.c b/bsp/env/coreplexip-e31-arty/init.c deleted file mode 100644 index 1f8b679..0000000 --- a/bsp/env/coreplexip-e31-arty/init.c +++ /dev/null @@ -1,122 +0,0 @@ -//See LICENSE for license details. -#include <stdint.h> -#include <stdio.h> -#include <unistd.h> - -#include "platform.h" -#include "encoding.h" - -#define CPU_FREQ 65000000 -#define XSTR(x) #x -#define STR(x) XSTR(x) - -#ifndef VECT_IRQ - #define TRAP_ENTRY trap_entry -#else - #define TRAP_ENTRY vtrap_entry -#endif - -extern int main(int argc, char** argv); -extern void TRAP_ENTRY(); - -unsigned long get_cpu_freq() -{ - return CPU_FREQ; -} - -unsigned long get_timer_freq() -{ - return get_cpu_freq(); -} - -uint64_t get_timer_value() -{ -#if __riscv_xlen == 32 - while (1) { - uint32_t hi = read_csr(mcycleh); - uint32_t lo = read_csr(mcycle); - if (hi == read_csr(mcycleh)) - return ((uint64_t)hi << 32) | lo; - } -#else - return read_csr(mcycle); -#endif -} - -static void uart_init(size_t baud_rate) -{ - UART0_REG(UART_REG_DIV) = (get_cpu_freq() / 2) / baud_rate - 1; - UART0_REG(UART_REG_TXCTRL) |= UART_TXEN; -} - - -#ifdef USE_PLIC -extern void handle_m_ext_interrupt(); -#endif - -#ifdef USE_M_TIME -extern void handle_m_time_interrupt(); -#endif - -#ifdef USE_LOCAL_ISR -typedef void (*my_interrupt_function_ptr_t) (void); -extern my_interrupt_function_ptr_t localISR[]; -#endif - -#ifndef VECT_IRQ -uintptr_t handle_trap(uintptr_t mcause, uintptr_t epc) __attribute__((noinline)); -uintptr_t handle_trap(uintptr_t mcause, uintptr_t epc) -{ - if (0){ -#ifdef USE_PLIC - // External Machine-Level interrupt from PLIC - } else if ((mcause & MCAUSE_INT) && ((mcause & MCAUSE_CAUSE) == IRQ_M_EXT)) { - handle_m_ext_interrupt(); -#endif -#ifdef USE_M_TIME - // External Machine-Level interrupt from PLIC - } else if ((mcause & MCAUSE_INT) && ((mcause & MCAUSE_CAUSE) == IRQ_M_TIMER)){ - handle_m_time_interrupt(); -#endif -#ifdef USE_LOCAL_ISR - } else if (mcause & MCAUSE_INT) { - localISR[mcause & MCAUSE_CAUSE] (); -#endif - } - else { - write(1, "Unhandled Trap:\n", 16); - _exit(1 + mcause); - } - return epc; -} -#endif - -#ifdef USE_CLIC -void trap_entry(void) __attribute__((interrupt("SiFive-CLIC-preemptible"), aligned(64))); -void trap_entry(void) -{ - unsigned long mcause = read_csr(mcause); - unsigned long mepc = read_csr(mepc); - handle_trap(mcause, mepc); -} -#endif - -void _init() -{ - #ifndef NO_INIT - uart_init(115200); - - puts("core freq at " STR(CPU_FREQ) " Hz\n"); - -#ifdef USE_CLIC - write_csr(mtvec, ((unsigned long)&trap_entry | MTVEC_CLIC)); -#else - write_csr(mtvec, ((unsigned long)&TRAP_ENTRY | MTVEC_VECTORED)); -#endif - - #endif -} - -void _fini() -{ -} |