OVMS3-idf/components/xtensa/include/esp_debug_helpers.h

#pragma once

#ifdef __cplusplus
extern "C" {
#endif

#ifndef __ASSEMBLER__

#include "esp_err.h"

#define ESP_WATCHPOINT_LOAD 0x40000000
#define ESP_WATCHPOINT_STORE 0x80000000
#define ESP_WATCHPOINT_ACCESS 0xC0000000

/**
 * @brief If an OCD is connected over JTAG. set breakpoint 0 to the given function
 *        address. Do nothing otherwise.
 * @param fn  Pointer to the target breakpoint position
 */
void esp_set_breakpoint_if_jtag(void *fn);

/**
 * @brief Set a watchpoint to break/panic when a certain memory range is accessed.
 *
 * @param no Watchpoint number. On the ESP32, this can be 0 or 1.
 * @param adr Base address to watch
 * @param size Size of the region, starting at the base address, to watch. Must
 *             be one of 2^n, with n in [0..6].
 * @param flags One of ESP_WATCHPOINT_* flags
 *
 * @return ESP_ERR_INVALID_ARG on invalid arg, ESP_OK otherwise
 *
 * @warning The ESP32 watchpoint hardware watches a region of bytes by effectively
 *          masking away the lower n bits for a region with size 2^n. If adr does
 *          not have zero for these lower n bits, you may not be watching the
 *          region you intended.
 */
esp_err_t esp_set_watchpoint(int no, void *adr, int size, int flags);


/**
 * @brief Clear a watchpoint
 *
 * @param no Watchpoint to clear
 *
 */
void esp_clear_watchpoint(int no);

/**
 * @brief Checks stack pointer
 */
static inline bool esp_stack_ptr_is_sane(uint32_t sp)
{
	return !(sp < 0x3ffae010UL || sp > 0x3ffffff0UL || ((sp & 0xf) != 0));
}

#endif
#ifdef __cplusplus
}
#endif