imi415
/
ibex_demo
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

More IRQ handlers.

This commit is contained in:
imi415 2020-06-02 21:34:58 +08:00
parent 15703025b0
commit 3552dd37a8
Signed by: imi415
GPG Key ID: 17F01E106F9F5E0A
4 changed files with 59 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Makefile
View File

@ -31,7 +31,7 @@ BIN = $(CP) -O binary
CFLAGS += -mabi=ilp32 -march=rv32imc -g $(INCLUDES)
ASFLAGS += -mabi=ilp32 -march=rv32imc -g
LDFLAGS += -nostartfiles -specs=nosys.specs -lc -lm -lnosys
LDFLAGS += -nostartfiles -specs=nosys.specs -specs=nano.specs -lc -lm -lnosys
LDFLAGS += -T$(LDSCRIPT) -Wl,-Map=$(BUILD_DIR)/$(TARGET).map -Wl,--print-memory-usage

22
src/ibex_it.c
View File

@ -2,14 +2,34 @@
#include <stdio.h>
#include "soc_peripherals.h"
#include "xilinx_timer.h"
void Generic_ExceptionCallback(void) {
printf("Generic exception handler!!\r\n");
for(;;) {
//
}
}
__attribute__((interrupt)) void Generic_TimerCallback(void) {
TIMER0->TCSR0 |= (1 << 0x08); // Clear interrupt;
SysTick++;
}
__attribute__((interrupt)) void Generic_TrapCallback(void) {
printf("Trap!!\r\n");
uint32_t mepc, mcause, mstatus;
__csrr("mepc", mepc);
__csrr("mcause", mcause);
__csrr("mstatus", mstatus);
printf("mepc: 0x%08x, mcause: 0x%08x, mstatus: 0x%08x\r\n", mepc, mcause, mstatus);
for(;;) {
}
}
__attribute__((interrupt)) void NMI_Handler(void) {
printf("NMI occurred!!\r\n");
for(;;) {
//
}
}

3
src/main.c
View File

@ -31,7 +31,8 @@ int main(int argc, char *argv[]) {
previous_tick = GetTick();
xilinx_gpio_toggle(&soc_gpio, 1);
printf("SysTick: %lu\r\n", GetTick());
printf("MCycle: %016llx\r\n", __read_mcycle());
uint64_t cycle = __read_mcycle();
printf("MCycle: %08lx%08lx\r\n", (uint32_t)(cycle >> 32), cycle & 0xFFFFFFFFU);
}
}
return 0;

44
startup.s
View File

@ -85,18 +85,44 @@ Default_IRQHandler:
Timer_IRQHandler:
jal x0, Generic_TimerCallback
Trap_Handler:
jal x0, Generic_TrapCallback
/* ISR vector table */
.section .isr_vectors, "ax"
.option norvc;
.org 0x00
.rept 7
jal x0, Default_IRQHandler
.endr
jal x0, Timer_IRQHandler
.rept 23
jal x0, Default_IRQHandler
.endr
.org 0x80
jal x0, Trap_Handler /* Trap IRQ (IRQ 0) */
jal x0, Default_IRQHandler /* IRQ 1 */
jal x0, Default_IRQHandler /* IRQ 2 */
jal x0, Default_IRQHandler /* IRQ 3 */
jal x0, Default_IRQHandler /* IRQ 4 */
jal x0, Default_IRQHandler /* IRQ 5 */
jal x0, Default_IRQHandler /* IRQ 6 */
jal x0, Timer_IRQHandler /* Timer IRQ (IRQ 7) */
jal x0, Default_IRQHandler /* IRQ 8 */
jal x0, Default_IRQHandler /* IRQ 9 */
jal x0, Default_IRQHandler /* IRQ 10 */
jal x0, Default_IRQHandler /* External IRQ (IRQ 11) */
jal x0, Default_IRQHandler /* IRQ 12 */
jal x0, Default_IRQHandler /* IRQ 13 */
jal x0, Default_IRQHandler /* IRQ 14 */
jal x0, Default_IRQHandler /* IRQ 15 */
jal x0, Default_IRQHandler /* Fast IRQ 0 (IRQ 16) */
jal x0, Default_IRQHandler /* Fast IRQ 1 (IRQ 17) */
jal x0, Default_IRQHandler /* Fast IRQ 2 (IRQ 18) */
jal x0, Default_IRQHandler /* Fast IRQ 3 (IRQ 19) */
jal x0, Default_IRQHandler /* Fast IRQ 4 (IRQ 20) */
jal x0, Default_IRQHandler /* Fast IRQ 5 (IRQ 21) */
jal x0, Default_IRQHandler /* Fast IRQ 6 (IRQ 22) */
jal x0, Default_IRQHandler /* Fast IRQ 7 (IRQ 23) */
jal x0, Default_IRQHandler /* Fast IRQ 8 (IRQ 24) */
jal x0, Default_IRQHandler /* Fast IRQ 9 (IRQ 25) */
jal x0, Default_IRQHandler /* Fast IRQ 10 (IRQ 26) */
jal x0, Default_IRQHandler /* Fast IRQ 11 (IRQ 27) */
jal x0, Default_IRQHandler /* Fast IRQ 12 (IRQ 28) */
jal x0, Default_IRQHandler /* Fast IRQ 13 (IRQ 29) */
jal x0, Default_IRQHandler /* Fast IRQ 14 (IRQ 30) */
jal x0, NMI_Handler /* Non-Maskable IRQ (IRQ 31) */
jal x0, Reset_Handler