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59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
/*
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* SPDX-FileCopyrightText: 2010-2021 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef _SOC_CPU_H
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#define _SOC_CPU_H
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#include <stdint.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include "esp_cpu.h"
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#if __XTENSA__
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#include "xt_instr_macros.h"
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// [refactor-todo] not actually needed in this header now,
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// but kept for compatibility
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#include "xtensa/corebits.h"
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#include "xtensa/config/core.h"
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#include "xtensa/config/specreg.h"
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** @brief Read current stack pointer address.
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* Superseded by esp_cpu_get_sp in esp_cpu.h.
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*/
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static inline __attribute__((deprecated)) void *get_sp(void)
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{
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return esp_cpu_get_sp();
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}
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static inline uint32_t esp_cpu_process_stack_pc(uint32_t pc)
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{
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if (pc & 0x80000000) {
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//Top two bits of a0 (return address) specify window increment. Overwrite to map to address space.
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pc = (pc & 0x3fffffff) | 0x40000000;
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}
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//Minus 3 to get PC of previous instruction (i.e. instruction executed before return address)
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return pc - 3;
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}
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/**
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* @brief Configure CPU to disable access to invalid memory regions
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*
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*/
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void esp_cpu_configure_region_protection(void);
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#ifdef __cplusplus
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}
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#endif
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#endif
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