/* * SPDX-FileCopyrightText: 2020-2022 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" #define RV_INT_COUNT 32 static inline void assert_valid_rv_int_num(int rv_int_num) { assert(rv_int_num != 0 && rv_int_num < RV_INT_COUNT && "Invalid CPU interrupt number"); } /*************************** Software interrupt dispatcher ***************************/ typedef struct { intr_handler_t handler; void *arg; } intr_handler_item_t; static intr_handler_item_t s_intr_handlers[32]; void intr_handler_set(int int_no, intr_handler_t fn, void *arg) { assert_valid_rv_int_num(int_no); s_intr_handlers[int_no] = (intr_handler_item_t) { .handler = fn, .arg = arg }; } intr_handler_t intr_handler_get(int rv_int_num) { return s_intr_handlers[rv_int_num].handler; } void *intr_handler_get_arg(int rv_int_num) { return s_intr_handlers[rv_int_num].arg; } /* called from vectors.S */ void _global_interrupt_handler(intptr_t sp, int mcause) { intr_handler_item_t it = s_intr_handlers[mcause]; if (it.handler) { (*it.handler)(it.arg); } } /*************************** RISC-V interrupt enable/disable ***************************/ void intr_matrix_route(int intr_src, int intr_num) { assert(intr_num != 0); REG_WRITE(DR_REG_INTERRUPT_BASE + 4 * intr_src, intr_num); } uint32_t esprv_intc_get_interrupt_unmask(void) { return REG_READ(INTERRUPT_CORE0_CPU_INT_ENABLE_REG); } /*************************** ESP-RV Interrupt Controller ***************************/ enum intr_type esprv_intc_int_get_type(int intr_num) { uint32_t intr_type_reg = REG_READ(INTERRUPT_CORE0_CPU_INT_TYPE_REG); return (intr_type_reg & (1 << intr_num)) ? INTR_TYPE_EDGE : INTR_TYPE_LEVEL; } int esprv_intc_int_get_priority(int rv_int_num) { uint32_t intr_priority_reg = REG_READ(INTC_INT_PRIO_REG(rv_int_num)); return intr_priority_reg; } /*************************** 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" };