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https://github.com/espressif/esp-idf.git
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baa28b54a2
esp_light_sleep_start() will stall the other CPU via esp_ipc_isr_stall_other_cpu(). After stalling the other CPU, will call esp_clk_... API which themselves take locks. If the other stalled CPU is holding those locks, this will result in a deadlock. This commit adds a workaround calling esp_clk_private_lock() to take the lock before stalling the other CPU.
122 lines
4.1 KiB
C
122 lines
4.1 KiB
C
/*
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* SPDX-FileCopyrightText: 2015-2022 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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#pragma once
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#include "sdkconfig.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef CONFIG_ESP_IPC_ISR_ENABLE
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/**
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* @brief IPC ISR Callback
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*
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* A callback of this type should be provided as an argument when calling esp_ipc_isr_asm_call() or
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* esp_ipc_isr_asm_call_blocking().
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*/
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typedef void (*esp_ipc_isr_func_t)(void* arg);
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/**
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* @brief Execute an assembly callback on the other CPU
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*
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* Execute a given callback on the other CPU in the context of a High Priority Interrupt.
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*
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* - This function will busy-wait in a critical section until the other CPU has started execution of the callback
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* - The callback must be written in assembly, is invoked using a CALLX0 instruction, and has a2, a3, a4 as scratch
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* registers. See docs for more details
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*
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* @note This function is not available in single-core mode.
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*
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* @param[in] func Pointer to a function of type void func(void* arg) to be executed
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* @param[in] arg Arbitrary argument of type void* to be passed into the function
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*/
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void esp_ipc_isr_asm_call(esp_ipc_isr_func_t func, void* arg);
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/**
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* @brief Execute an assembly callback on the other CPU and busy-wait until it completes
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*
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* This function is identical to esp_ipc_isr_asm_call() except that this function will busy-wait until the execution of
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* the callback completes.
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*
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* @note This function is not available in single-core mode.
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*
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* @param[in] func Pointer to a function of type void func(void* arg) to be executed
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* @param[in] arg Arbitrary argument of type void* to be passed into the function
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*/
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void esp_ipc_isr_asm_call_blocking(esp_ipc_isr_func_t func, void* arg);
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/**
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* @brief Stall the other CPU
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*
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* This function will stall the other CPU. The other CPU is stalled by busy-waiting in the context of a High Priority
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* Interrupt. The other CPU will not be resumed until esp_ipc_isr_release_other_cpu() is called.
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*
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* - This function is internally implemented using IPC ISR
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* - This function is used for DPORT workaround.
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* - If the stall feature is paused using esp_ipc_isr_stall_pause(), this function will have no effect
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*
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* @note This function is not available in single-core mode.
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* @note It is the caller's responsibility to avoid deadlocking on spinlocks
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*/
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void esp_ipc_isr_stall_other_cpu(void);
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/**
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* @brief Release the other CPU
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*
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* This function will release the other CPU that was previously stalled from calling esp_ipc_isr_stall_other_cpu()
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*
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* - This function is used for DPORT workaround.
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* - If the stall feature is paused using esp_ipc_isr_stall_pause(), this function will have no effect
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*
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* @note This function is not available in single-core mode.
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*/
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void esp_ipc_isr_release_other_cpu(void);
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/**
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* @brief Puase the CPU stall feature
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*
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* This function will pause the CPU stall feature. Once paused, calls to esp_ipc_isr_stall_other_cpu() and
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* esp_ipc_isr_release_other_cpu() will have no effect. If a IPC ISR call is already in progress, this function will
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* busy-wait until the call completes before pausing the CPU stall feature.
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*/
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void esp_ipc_isr_stall_pause(void);
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/**
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* @brief Abort a CPU stall
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*
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* This function will abort any stalling routine of the other CPU due to a pervious call to
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* esp_ipc_isr_stall_other_cpu(). This function aborts the stall in a non-recoverable manner, thus should only be called
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* in case of a panic().
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*
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* - This function is used in panic handling code
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*/
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void esp_ipc_isr_stall_abort(void);
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/**
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* @brief Resume the CPU stall feature
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*
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* This function will resume the CPU stall feature that was previously paused by calling esp_ipc_isr_stall_pause(). Once
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* resumed, calls to esp_ipc_isr_stall_other_cpu() and esp_ipc_isr_release_other_cpu() will have effect again.
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*/
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void esp_ipc_isr_stall_resume(void);
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#else // CONFIG_ESP_IPC_ISR_ENABLE
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#define esp_ipc_isr_stall_other_cpu()
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#define esp_ipc_isr_release_other_cpu()
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#define esp_ipc_isr_stall_pause()
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#define esp_ipc_isr_stall_abort()
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#define esp_ipc_isr_stall_resume()
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#endif // CONFIG_ESP_IPC_ISR_ENABLE
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#ifdef __cplusplus
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}
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#endif
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