esp-idf/components/hal/interrupt_controller_hal.c

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// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "hal/interrupt_controller_hal.h"
#include "soc/soc_caps.h"
#if __riscv
#include "riscv/instruction_decode.h"
static bool is_interrupt_number_reserved(int interrupt_number)
{
//TODO. Workaround to reserve interrupt number 0 for Wi-Fi.
if (interrupt_number == 1) {
return true;
}
extern int _vector_table;
extern int _interrupt_handler;
const intptr_t pc = (intptr_t)(&_vector_table + interrupt_number);
/* JAL instructions are relative to the PC there are executed from. */
const intptr_t destination = pc + riscv_decode_offset_from_jal_instruction(pc);
return destination != (intptr_t)&_interrupt_handler;
}
#endif
int_type_t interrupt_controller_hal_desc_type(int interrupt_number)
{
#ifndef SOC_CPU_HAS_FLEXIBLE_INTC
const int_desc_t *int_desc = interrupt_controller_hal_desc_table();
return (int_desc[interrupt_number].type);
#else
return (INTTP_NA);
#endif
}
int interrupt_controller_hal_desc_level(int interrupt_number)
{
#ifndef SOC_CPU_HAS_FLEXIBLE_INTC
const int_desc_t *int_desc = interrupt_controller_hal_desc_table();
return (int_desc[interrupt_number].level);
#else
return 1;
#endif
}
int_desc_flag_t interrupt_controller_hal_desc_flags(int interrupt_number, int cpu_number)
{
#ifndef SOC_CPU_HAS_FLEXIBLE_INTC
const int_desc_t *int_desc = interrupt_controller_hal_desc_table();
return (int_desc[interrupt_number].cpuflags[cpu_number]);
#else
#if __riscv
return is_interrupt_number_reserved(interrupt_number) ? INTDESC_RESVD : INTDESC_NORMAL;
#else
return INTDESC_NORMAL;
#endif
#endif
}