103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
// Copyright 2010-2016 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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// 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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#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 "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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#include "xt_instr_macros.h"
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#include "hal/cpu_hal.h"
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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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*
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*/
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static inline void *get_sp(void)
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{
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return cpu_hal_get_sp();
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}
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/**
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* @brief Stall CPU using RTC controller
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* @param cpu_id ID of the CPU to stall (0 = PRO, 1 = APP)
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*/
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void esp_cpu_stall(int cpu_id);
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/**
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* @brief Un-stall CPU using RTC controller
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* @param cpu_id ID of the CPU to un-stall (0 = PRO, 1 = APP)
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*/
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void esp_cpu_unstall(int cpu_id);
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/**
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* @brief Reset CPU using RTC controller
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* @param cpu_id ID of the CPU to reset (0 = PRO, 1 = APP)
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*/
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void esp_cpu_reset(int cpu_id);
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/**
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* @brief Returns true if a JTAG debugger is attached to CPU
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* OCD (on chip debug) port.
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*
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* @note If "Make exception and panic handlers JTAG/OCD aware"
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* is disabled, this function always returns false.
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*/
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bool esp_cpu_in_ocd_debug_mode(void);
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/**
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* @brief Convert the PC register value to its true address
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*
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* The address of the current instruction is not stored as an exact uint32_t
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* representation in PC register. This function will convert the value stored in
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* the PC register to a uint32_t address.
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*
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* @param pc_raw The PC as stored in register format.
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*
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* @return Address in uint32_t format
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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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typedef uint32_t esp_cpu_ccount_t;
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static inline esp_cpu_ccount_t esp_cpu_get_ccount(void)
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{
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uint32_t result;
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RSR(CCOUNT, result);
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return result;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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