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112 lines
2.7 KiB
C
112 lines
2.7 KiB
C
// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <stdint.h>
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#include <stddef.h>
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#include <assert.h>
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#include "riscv/interrupt.h"
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#include "soc/interrupt_reg.h"
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#include "riscv/csr.h"
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#include "esp_attr.h"
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#define RV_INT_COUNT 32
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static inline void assert_valid_rv_int_num(int rv_int_num)
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{
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assert(rv_int_num != 0 && rv_int_num < RV_INT_COUNT && "Invalid CPU interrupt number");
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}
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/*************************** Software interrupt dispatcher ***************************/
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typedef struct {
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intr_handler_t handler;
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void *arg;
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} intr_handler_item_t;
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static intr_handler_item_t s_intr_handlers[32];
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void intr_handler_set(int int_no, intr_handler_t fn, void *arg)
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{
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assert_valid_rv_int_num(int_no);
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s_intr_handlers[int_no] = (intr_handler_item_t) {
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.handler = fn,
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.arg = arg
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};
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}
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intr_handler_t intr_handler_get(int rv_int_num)
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{
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return s_intr_handlers[rv_int_num].handler;
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}
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void *intr_handler_get_arg(int rv_int_num)
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{
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return s_intr_handlers[rv_int_num].arg;
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}
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/* called from vectors.S */
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void _global_interrupt_handler(intptr_t sp, int mcause)
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{
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intr_handler_item_t it = s_intr_handlers[mcause];
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if (it.handler) {
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(*it.handler)(it.arg);
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}
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}
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/*************************** RISC-V interrupt enable/disable ***************************/
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void intr_matrix_route(int intr_src, int intr_num)
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{
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assert(intr_num != 0);
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REG_WRITE(DR_REG_INTERRUPT_BASE + 4 * intr_src, intr_num);
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}
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void riscv_global_interrupts_enable(void)
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{
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RV_SET_CSR(mstatus, MSTATUS_MIE);
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}
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void riscv_global_interrupts_disable(void)
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{
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RV_CLEAR_CSR(mstatus, MSTATUS_MIE);
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}
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uint32_t esprv_intc_get_interrupt_unmask(void)
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{
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return REG_READ(INTERRUPT_CORE0_CPU_INT_ENABLE_REG);
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}
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/*************************** Exception names. Used in .gdbinit file. ***************************/
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const char *riscv_excp_names[16] __attribute__((used)) = {
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"misaligned_fetch",
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"fault_fetch",
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"illegal_instruction",
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"breakpoint",
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"misaligned_load",
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"fault_load",
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"misaligned_store",
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"fault_store",
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"user_ecall",
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"supervisor_ecall",
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"hypervisor_ecall",
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"machine_ecall",
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"exec_page_fault",
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"load_page_fault",
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"reserved",
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"store_page_fault"
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};
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