esp-idf/components/riscv/interrupt.c

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/*
* SPDX-FileCopyrightText: 2020-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdint.h>
#include <stddef.h>
#include <assert.h>
#include "soc/soc.h"
#include "riscv/interrupt.h"
#include "soc/interrupt_reg.h"
#include "riscv/csr.h"
#include "esp_attr.h"
#include "riscv/rv_utils.h"
typedef struct {
intr_handler_t handler;
void *arg;
} intr_handler_item_t;
static intr_handler_item_t s_intr_handlers[SOC_CPU_CORES_NUM][RV_EXTERNAL_INT_COUNT];
static intr_handler_item_t* intr_get_item(int int_no)
{
assert_valid_rv_int_num(int_no);
const uint32_t id = rv_utils_get_core_id();
return &s_intr_handlers[id][int_no];
}
/*************************** Software interrupt dispatcher ***************************/
void intr_handler_set(int int_no, intr_handler_t fn, void *arg)
{
intr_handler_item_t* item = intr_get_item(int_no);
*item = (intr_handler_item_t) {
.handler = fn,
.arg = arg
};
}
intr_handler_t intr_handler_get(int rv_int_num)
{
const intr_handler_item_t* item = intr_get_item(rv_int_num);
return item->handler;
}
void *intr_handler_get_arg(int rv_int_num)
{
const intr_handler_item_t* item = intr_get_item(rv_int_num);
return item->arg;
}
/* called from vectors.S */
void _global_interrupt_handler(intptr_t sp, int mcause)
{
/* mcause contains the interrupt number that triggered the current interrupt, this number
* also take into account local/internal interrupt, however, this should not happen in practice,
* since we never map any peripheral to those. */
assert(mcause >= RV_EXTERNAL_INT_OFFSET && "Interrupt sources must not be mapped to local interrupts");
const intr_handler_item_t* item = intr_get_item(mcause - RV_EXTERNAL_INT_OFFSET);
if (item->handler) {
(*item->handler)(item->arg);
}
}
/*************************** Exception names. Used in .gdbinit file. ***************************/
const char *riscv_excp_names[16] __attribute__((used)) = {
"misaligned_fetch",
"fault_fetch",
"illegal_instruction",
"breakpoint",
"misaligned_load",
"fault_load",
"misaligned_store",
"fault_store",
"user_ecall",
"supervisor_ecall",
"hypervisor_ecall",
"machine_ecall",
"exec_page_fault",
"load_page_fault",
"reserved",
"store_page_fault"
};