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Merge branch 'fix/esp_flash_coredump_4.0' into 'release/v4.0'

Browse Source 
esp_flash: fix coredump issues (backport v4.0)

See merge request espressif/esp-idf!6136
This commit is contained in:
Ivan Grokhotkov 2019-09-26 21:26:53 +08:00
commit e5ff431b35
13 changed files with 243 additions and 99 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
components/esp32/cpu_start.c
View File

@ -43,7 +43,7 @@
#include "sdkconfig.h"
#include "esp_system.h"
#include "esp_spi_flash.h"
#include "esp_flash.h"
#include "esp_flash_internal.h"
#include "nvs_flash.h"
#include "esp_event.h"
#include "esp_spi_flash.h"

13
components/espcoredump/linker.lf
View File

@ -1,7 +1,16 @@
[mapping:espcoredump]
archive: libespcoredump.a
entries:
entries:
core_dump_uart (noflash_text)
core_dump_flash (noflash_text)
core_dump_common (noflash_text)
core_dump_port (noflash_text)
core_dump_port (noflash_text)
[mapping:spi_flash_override]
archive: libspi_flash.a
entries:
if ESP32_ENABLE_COREDUMP_TO_FLASH = y:
esp_flash_api (noflash_text)
esp_flash_spi_init (noflash_text)
else:
* (default)

26
components/espcoredump/src/core_dump_flash.c
View File

@ -15,6 +15,9 @@
#include "esp32/rom/crc.h"
#include "esp_partition.h"
#include "esp_core_dump_priv.h"
#include "esp_flash_internal.h"
#include "sdkconfig.h"
const static DRAM_ATTR char TAG[] __attribute__((unused)) = "esp_core_dump_flash";
@ -50,7 +53,7 @@ static inline core_dump_crc_t esp_core_dump_calc_flash_config_crc(void)
return crc32_le(0, (uint8_t const *)&s_core_flash_config.partition, sizeof(s_core_flash_config.partition));
}
void esp_core_dump_flash_init()
void esp_core_dump_flash_init(void)
{
const esp_partition_t *core_part;
@ -82,7 +85,11 @@ static uint32_t esp_core_dump_write_flash_padded(size_t off, uint8_t *data, uint
assert((off + data_len + (data_size % sizeof(uint32_t) ? sizeof(uint32_t) : 0)) <=
s_core_flash_config.partition.start + s_core_flash_config.partition.size);
#ifdef CONFIG_SPI_FLASH_USE_LEGACY_IMPL
err = spi_flash_write(off, data, data_len);
#else
err = esp_flash_write(esp_flash_default_chip, data, off, data_len);
#endif
if (err != ESP_OK) {
ESP_COREDUMP_LOGE("Failed to write data to flash (%d)!", err);
return 0;
@ -95,7 +102,11 @@ static uint32_t esp_core_dump_write_flash_padded(size_t off, uint8_t *data, uint
for (k = 0; k < len; k++) {
rom_data.data8[k] = *(data + data_len + k);
}
#ifdef CONFIG_SPI_FLASH_USE_LEGACY_IMPL
err = spi_flash_write(off + data_len, &rom_data, sizeof(uint32_t));
#else
err = esp_flash_write(esp_flash_default_chip, &rom_data, off + data_len, sizeof(uint32_t));
#endif
if (err != ESP_OK) {
ESP_COREDUMP_LOGE("Failed to finish write data to flash (%d)!", err);
return 0;
@ -127,7 +138,11 @@ static esp_err_t esp_core_dump_flash_write_prepare(void *priv, uint32_t *data_le
sec_num++;
}
assert(sec_num * SPI_FLASH_SEC_SIZE <= s_core_flash_config.partition.size);
#ifdef CONFIG_SPI_FLASH_USE_LEGACY_IMPL
err = spi_flash_erase_range(s_core_flash_config.partition.start + 0, sec_num * SPI_FLASH_SEC_SIZE);
#else
err = esp_flash_erase_region(esp_flash_default_chip, s_core_flash_config.partition.start + 0, sec_num * SPI_FLASH_SEC_SIZE);
#endif
if (err != ESP_OK) {
ESP_COREDUMP_LOGE("Failed to erase flash (%d)!", err);
return err;
@ -141,7 +156,11 @@ static esp_err_t esp_core_dump_flash_write_word(core_dump_write_flash_data_t *wr
uint32_t data32 = word;
assert(wr_data->off + sizeof(uint32_t) <= s_core_flash_config.partition.size);
#ifdef CONFIG_SPI_FLASH_USE_LEGACY_IMPL
err = spi_flash_write(s_core_flash_config.partition.start + wr_data->off, &data32, sizeof(uint32_t));
#else
err = esp_flash_write(esp_flash_default_chip, &data32, s_core_flash_config.partition.start + wr_data->off, sizeof(uint32_t));
#endif
if (err != ESP_OK) {
ESP_COREDUMP_LOGE("Failed to write to flash (%d)!", err);
return err;
@ -166,7 +185,11 @@ static esp_err_t esp_core_dump_flash_write_end(void *priv)
uint32_t data32[4];
} rom_data;
#ifdef CONFIG_SPI_FLASH_USE_LEGACY_IMPL
esp_err_t err = spi_flash_read(s_core_flash_config.partition.start + 0, &rom_data, sizeof(rom_data));
#else
esp_err_t err = esp_flash_read(esp_flash_default_chip, &rom_data, s_core_flash_config.partition.start + 0, sizeof(rom_data));
#endif
if (err != ESP_OK) {
ESP_COREDUMP_LOGE("Failed to read flash (%d)!", err);
return err;
@ -216,6 +239,7 @@ void esp_core_dump_to_flash(XtExcFrame *frame)
/* init non-OS flash access critical section */
spi_flash_guard_set(&g_flash_guard_no_os_ops);
esp_flash_app_disable_protect(true);
memset(&wr_cfg, 0, sizeof(wr_cfg));
wr_cfg.prepare = esp_core_dump_flash_write_prepare;

5
components/soc/include/hal/spi_flash_types.h
View File

@ -142,11 +142,6 @@ struct spi_flash_host_driver_t {
* modified, the cache needs to be flushed. Left NULL if not supported.
*/
esp_err_t (*flush_cache)(spi_flash_host_driver_t* driver, uint32_t addr, uint32_t size);
/**
* Check if the given region is protected (e.g. is the bootloader). Left
* NULL if current host doesn't need protection.
*/
bool (*region_protected)(spi_flash_host_driver_t* driver, uint32_t addr, uint32_t size);
};
#ifdef __cplusplus

13
components/spi_flash/CMakeLists.txt
View File

@ -4,21 +4,24 @@ if(BOOTLOADER_BUILD)
# need other parts of this component
set(srcs "spi_flash_rom_patch.c")
else()
set(srcs
set(srcs
"cache_utils.c"
"flash_mmap.c"
"flash_ops.c"
"partition.c"
"spi_flash_rom_patch.c"
)
# New implementation
list(APPEND srcs
"spi_flash_chip_drivers.c"
"spi_flash_chip_generic.c"
"spi_flash_chip_issi.c"
"spi_flash_os_func_app.c"
"spi_flash_os_func_noos.c"
"memspi_host_driver.c")
if(NOT CONFIG_SPI_FLASH_USE_LEGACY_IMPL)
list(APPEND srcs "esp_flash_api.c" "esp_flash_spi_init.c")
endif()
"memspi_host_driver.c"
"esp_flash_api.c"
"esp_flash_spi_init.c"
)
set(priv_requires bootloader_support app_update soc)
endif()

37
components/spi_flash/esp_flash_api.c
View File

@ -22,6 +22,7 @@
#include "esp_log.h"
#include "sdkconfig.h"
#include "esp_heap_caps.h"
#include "esp_flash_internal.h"
static const char TAG[] = "spi_flash";
@ -42,7 +43,7 @@ static const char TAG[] = "spi_flash";
#define CHECK_WRITE_ADDRESS(CHIP, ADDR, SIZE)
#else /* FAILS or ABORTS */
#define CHECK_WRITE_ADDRESS(CHIP, ADDR, SIZE) do { \
if (CHIP && CHIP->host->region_protected && CHIP->host->region_protected(CHIP->host, ADDR, SIZE)) { \
if (CHIP && CHIP->os_func->region_protected && CHIP->os_func->region_protected(CHIP->os_func_data, ADDR, SIZE)) { \
UNSAFE_WRITE_ADDRESS; \
} \
} while(0)
@ -294,14 +295,15 @@ esp_err_t IRAM_ATTR esp_flash_erase_region(esp_flash_t *chip, uint32_t start, ui
return ESP_ERR_INVALID_ARG;
}
esp_err_t err = spiflash_start(chip);
if (err != ESP_OK) {
return err;
}
esp_err_t err = ESP_OK;
// Check for write protected regions overlapping the erase region
if (chip->chip_drv->get_protected_regions != NULL &&
chip->chip_drv->num_protectable_regions > 0) {
err = spiflash_start(chip);
if (err != ESP_OK) {
return err;
}
uint64_t protected = 0;
err = chip->chip_drv->get_protected_regions(chip, &protected);
if (err == ESP_OK && protected != 0) {
@ -313,10 +315,10 @@ esp_err_t IRAM_ATTR esp_flash_erase_region(esp_flash_t *chip, uint32_t start, ui
}
}
}
// Don't lock the SPI flash for the entire erase, as this may be very long
err = spiflash_end(chip, err);
}
// Don't lock the SPI flash for the entire erase, as this may be very long
err = spiflash_end(chip, err);
while (err == ESP_OK && len >= sector_size) {
err = spiflash_start(chip);
@ -615,13 +617,24 @@ esp_err_t IRAM_ATTR esp_flash_read_encrypted(esp_flash_t *chip, uint32_t address
return spi_flash_read_encrypted(address, out_buffer, length);
}
#ifndef CONFIG_SPI_FLASH_USE_LEGACY_IMPL
esp_err_t esp_flash_app_disable_protect(bool disable)
{
if (disable) {
return esp_flash_app_disable_os_functions(esp_flash_default_chip);
} else {
return esp_flash_app_init_os_functions(esp_flash_default_chip);
}
}
#endif
/*------------------------------------------------------------------------------
Adapter layer to original api before IDF v4.0
------------------------------------------------------------------------------*/
#ifndef CONFIG_SPI_FLASH_USE_LEGACY_IMPL
static esp_err_t spi_flash_translate_rc(esp_err_t err)
static IRAM_ATTR esp_err_t spi_flash_translate_rc(esp_err_t err)
{
switch (err) {
case ESP_OK:
@ -644,19 +657,19 @@ static esp_err_t spi_flash_translate_rc(esp_err_t err)
return ESP_OK;
}
esp_err_t spi_flash_erase_range(uint32_t start_addr, uint32_t size)
esp_err_t IRAM_ATTR spi_flash_erase_range(uint32_t start_addr, uint32_t size)
{
esp_err_t err = esp_flash_erase_region(NULL, start_addr, size);
return spi_flash_translate_rc(err);
}
esp_err_t spi_flash_write(size_t dst, const void *srcv, size_t size)
esp_err_t IRAM_ATTR spi_flash_write(size_t dst, const void *srcv, size_t size)
{
esp_err_t err = esp_flash_write(NULL, srcv, dst, size);
return spi_flash_translate_rc(err);
}
esp_err_t spi_flash_read(size_t src, void *dstv, size_t size)
esp_err_t IRAM_ATTR spi_flash_read(size_t src, void *dstv, size_t size)
{
esp_err_t err = esp_flash_read(NULL, dstv, src, size);
return spi_flash_translate_rc(err);

38
components/spi_flash/esp_flash_spi_init.c
View File

@ -22,8 +22,9 @@
#include "esp_heap_caps.h"
#include "hal/spi_types.h"
#include "driver/spi_common.h"
#include "esp_flash_internal.h"
static const char TAG[] = "spi_flash";
__attribute__((unused)) static const char TAG[] = "spi_flash";
#ifdef CONFIG_ESPTOOLPY_FLASHFREQ_80M
#define DEFAULT_FLASH_SPEED ESP_FLASH_80MHZ
@ -49,6 +50,18 @@ static const char TAG[] = "spi_flash";
#define DEFAULT_FLASH_MODE SPI_FLASH_FASTRD
#endif
#define ESP_FLASH_HOST_CONFIG_DEFAULT() (memspi_host_config_t){ \
.host_id = SPI_HOST,\
.speed = DEFAULT_FLASH_SPEED, \
.cs_num = 0, \
.iomux = false, \
.input_delay_ns = 0,\
}
esp_flash_t *esp_flash_default_chip = NULL;
static IRAM_ATTR void cs_initialize(esp_flash_t *chip, const esp_flash_spi_device_config_t *config, bool use_iomux)
{
//Not using spicommon_cs_initialize since we don't want to put the whole
@ -151,29 +164,22 @@ esp_err_t spi_bus_remove_flash_device(esp_flash_t *chip)
return ESP_OK;
}
#define ESP_FLASH_HOST_CONFIG_DEFAULT() (memspi_host_config_t){ \
.host_id = SPI_HOST,\
.speed = DEFAULT_FLASH_SPEED, \
.cs_num = 0, \
.iomux = false, \
.input_delay_ns = 0,\
}
static DRAM_ATTR spi_flash_host_driver_t esp_flash_default_host_drv = ESP_FLASH_DEFAULT_HOST_DRIVER();
static DRAM_ATTR memspi_host_data_t default_driver_data;
/* The default (ie initial boot) no-OS ROM esp_flash_os_functions_t */
extern const esp_flash_os_functions_t esp_flash_noos_functions;
#ifndef CONFIG_SPI_FLASH_USE_LEGACY_IMPL
static DRAM_ATTR memspi_host_data_t default_driver_data;
static DRAM_ATTR spi_flash_host_driver_t esp_flash_default_host_drv = ESP_FLASH_DEFAULT_HOST_DRIVER();
static DRAM_ATTR esp_flash_t default_chip = {
.read_mode = DEFAULT_FLASH_MODE,
.host = &esp_flash_default_host_drv,
.os_func = &esp_flash_noos_functions,
};
esp_flash_t *esp_flash_default_chip = NULL;
esp_err_t esp_flash_init_default_chip()
{
memspi_host_config_t cfg = ESP_FLASH_HOST_CONFIG_DEFAULT();
@ -202,5 +208,7 @@ esp_err_t esp_flash_init_default_chip()
esp_err_t esp_flash_app_init()
{
return esp_flash_init_os_functions(&default_chip, 0);
return esp_flash_app_init_os_functions(&default_chip);
}
#endif

30
components/spi_flash/include/esp_flash.h
View File

@ -45,6 +45,9 @@ typedef struct {
/** Called after completing any flash operation. */
esp_err_t (*end)(void *arg);
/** Called before any erase/write operations to check whether the region is limited by the OS */
esp_err_t (*region_protected)(void* arg, size_t start_addr, size_t size);
/** Delay for at least 'ms' milliseconds. Called in between 'start' and 'end'. */
esp_err_t (*delay_ms)(void *arg, unsigned ms);
} esp_flash_os_functions_t;
@ -282,33 +285,6 @@ esp_err_t esp_flash_read_encrypted(esp_flash_t *chip, uint32_t address, void *ou
*/
extern esp_flash_t *esp_flash_default_chip;
/** @brief Initialise the default SPI flash chip
*
* Called by OS startup code. You do not need to call this in your own applications.
*/
esp_err_t esp_flash_init_default_chip();
/**
* Enable OS-level SPI flash protections in IDF
*
* Called by OS startup code. You do not need to call this in your own applications.
*
* @return ESP_OK if success, otherwise failed. See return value of ``esp_flash_init_os_functions``.
*/
esp_err_t esp_flash_app_init();
/**
* Enable OS-level SPI flash for a specific chip.
*
* @param chip The chip to init os functions.
* @param host_id Which SPI host to use, 1 for SPI1, 2 for SPI2 (HSPI), 3 for SPI3 (VSPI)
*
* @return
* - ESP_OK if success
* - ESP_ERR_INVALID_ARG if host_id is invalid
*/
esp_err_t esp_flash_init_os_functions(esp_flash_t *chip, int host_id);
#ifdef __cplusplus
}

100
components/spi_flash/include/esp_flash_internal.h Normal file
View File

@ -0,0 +1,100 @@
// Copyright 2015-2019 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.
#pragma once
#include "esp_err.h"
#include <stdint.h>
#include <stdbool.h>
#include "sdkconfig.h"
#include "esp_flash.h"
/** Internal API, don't use in the applications */
#ifdef __cplusplus
extern "C" {
#endif
/** @brief Initialise the default SPI flash chip
*
* Called by OS startup code. You do not need to call this in your own applications.
*/
#ifdef CONFIG_SPI_FLASH_USE_LEGACY_IMPL
#define esp_flash_init_default_chip(...) ({ESP_OK;})
#else
esp_err_t esp_flash_init_default_chip(void);
#endif
/**
* Enable OS-level SPI flash protections in IDF
*
* Called by OS startup code. You do not need to call this in your own applications.
*
* @return ESP_OK if success, otherwise failed. See return value of ``esp_flash_init_os_functions``.
*/
#ifdef CONFIG_SPI_FLASH_USE_LEGACY_IMPL
#define esp_flash_app_init(...) ({ESP_OK;})
#else
esp_err_t esp_flash_app_init(void);
#endif
/**
* Disable OS-level SPI flash protections in IDF
*
* Called by the IDF internal code (e.g. coredump). You do not need to call this in your own applications.
*
* @return always ESP_OK.
*/
#ifdef CONFIG_SPI_FLASH_USE_LEGACY_IMPL
#define esp_flash_app_disable_protect(...) ({ESP_OK;})
#else
esp_err_t esp_flash_app_disable_protect(bool disable);
#endif
/**
* Initialize OS-level functions for a specific chip.
*
* @param chip The chip to init os functions.
* @param host_id Which SPI host to use, 1 for SPI1, 2 for SPI2 (HSPI), 3 for SPI3 (VSPI)
*
* @return
* - ESP_OK if success
* - ESP_ERR_INVALID_ARG if host_id is invalid
*/
esp_err_t esp_flash_init_os_functions(esp_flash_t *chip, int host_id);
/**
* Initialize OS-level functions for the main flash chip.
*
* @param chip The chip to init os functions. Only pointer to the default chip is supported now.
*
* @return always ESP_OK
*/
esp_err_t esp_flash_app_init_os_functions(esp_flash_t* chip);
/**
* Disable OS-level functions for the main flash chip during special phases (e.g. coredump)
*
* @param chip The chip to init os functions. Only "esp_flash_default_chip" is supported now.
*
* @return always ESP_OK
*/
esp_err_t esp_flash_app_disable_os_functions(esp_flash_t* chip);
#ifdef __cplusplus
}
#endif

12
components/spi_flash/include/memspi_host_driver.h
View File

@ -35,7 +35,6 @@
.configure_host_read_mode = spi_flash_hal_configure_host_read_mode, \
.poll_cmd_done = spi_flash_hal_poll_cmd_done, \
.flush_cache = memspi_host_flush_cache, \
.region_protected = memspi_region_protected, \
}
/// configuration for the memspi host
@ -100,14 +99,3 @@ esp_err_t memspi_host_read_status_hs(spi_flash_host_driver_t *driver, uint8_t *o
* @return always ESP_OK.
*/
esp_err_t memspi_host_flush_cache(spi_flash_host_driver_t* driver, uint32_t addr, uint32_t size);
/**
* Check if the given region is protected.
*
* @param driver The driver context.
* @param addr Start address of the region.
* @param size Size of the region to check.
*
* @return true if protected, otherwise false.
*/
bool memspi_region_protected(spi_flash_host_driver_t* driver, uint32_t addr, uint32_t size);

12
components/spi_flash/memspi_host_driver.c
View File

@ -34,7 +34,6 @@ esp_err_t memspi_host_init_pointers(spi_flash_host_driver_t *host, memspi_host_d
//some functions are not required if not SPI1
if (data->spi != &SPI1) {
host->flush_cache = NULL;
host->region_protected = NULL;
}
return ESP_OK;
}
@ -87,15 +86,4 @@ esp_err_t memspi_host_flush_cache(spi_flash_host_driver_t* driver, uint32_t addr
spi_flash_check_and_flush_cache(addr, size);
}
return ESP_OK;
}
bool memspi_region_protected(spi_flash_host_driver_t* driver, uint32_t addr, uint32_t size)
{
if (((memspi_host_data_t*)(driver->driver_data))->spi != &SPI1) {
return false;
}
if (!esp_partition_main_flash_region_safe(addr, size)) {
return true;
}
return false;
}

37
components/spi_flash/spi_flash_os_func_app.c
View File

@ -17,6 +17,8 @@
#include "esp_attr.h"
#include "esp_spi_flash.h" //for ``g_flash_guard_default_ops``
#include "esp_flash.h"
#include "esp_flash_partitions.h"
/*
* OS functions providing delay service and arbitration among chips, and with the cache.
@ -29,6 +31,11 @@ typedef struct {
int host_id;
} app_func_arg_t;
typedef struct {
int host_id;
bool no_protect; //to decide whether to check protected region (for the main chip) or not.
} spi1_app_func_arg_t;
// in the future we will have arbitration among devices, including flash on the same flash bus
static IRAM_ATTR esp_err_t spi_bus_acquire(int host_id)
{
@ -45,7 +52,7 @@ static IRAM_ATTR esp_err_t spi1_start(void *arg)
{
g_flash_guard_default_ops.start();
spi_bus_acquire(((app_func_arg_t *)arg)->host_id);
spi_bus_acquire(((spi1_app_func_arg_t *)arg)->host_id);
return ESP_OK;
}
@ -53,7 +60,7 @@ static IRAM_ATTR esp_err_t spi1_end(void *arg)
{
g_flash_guard_default_ops.end();
spi_bus_release(((app_func_arg_t *)arg)->host_id);
spi_bus_release(((spi1_app_func_arg_t *)arg)->host_id);
return ESP_OK;
}
@ -76,8 +83,24 @@ static IRAM_ATTR esp_err_t delay_ms(void *arg, unsigned ms)
return ESP_OK;
}
static DRAM_ATTR app_func_arg_t spi1_arg = {
static IRAM_ATTR esp_err_t main_flash_region_protected(void* arg, size_t start_addr, size_t size)
{
if (((spi1_app_func_arg_t*)arg)->no_protect || esp_partition_main_flash_region_safe(start_addr, size)) {
//ESP_OK = 0, also means protected==0
return ESP_OK;
} else {
return ESP_ERR_NOT_SUPPORTED;
}
}
static DRAM_ATTR spi1_app_func_arg_t spi1_arg = {
.host_id = 0, //for SPI1,
.no_protect = true,
};
static DRAM_ATTR spi1_app_func_arg_t main_flash_arg = {
.host_id = 0, //for SPI1,
.no_protect = false,
};
static app_func_arg_t spi2_arg = {
@ -93,6 +116,7 @@ const DRAM_ATTR esp_flash_os_functions_t esp_flash_spi1_default_os_functions = {
.start = spi1_start,
.end = spi1_end,
.delay_ms = delay_ms,
.region_protected = main_flash_region_protected,
};
const esp_flash_os_functions_t esp_flash_spi23_default_os_functions = {
@ -117,4 +141,11 @@ esp_err_t esp_flash_init_os_functions(esp_flash_t *chip, int host_id)
return ESP_OK;
}
esp_err_t esp_flash_app_init_os_functions(esp_flash_t* chip)
{
chip->os_func = &esp_flash_spi1_default_os_functions;
chip->os_func_data = &main_flash_arg;
return ESP_OK;
}

17
components/spi_flash/spi_flash_os_func_noos.c
View File

@ -20,13 +20,15 @@
#include "esp_attr.h"
static esp_err_t start(void *arg)
static IRAM_ATTR esp_err_t start(void *arg)
{
Cache_Read_Disable(0);
Cache_Read_Disable(1);
return ESP_OK;
}
static esp_err_t end(void *arg)
static IRAM_ATTR esp_err_t end(void *arg)
{
Cache_Flush(0);
Cache_Flush(1);
@ -35,14 +37,21 @@ static esp_err_t end(void *arg)
return ESP_OK;
}
static esp_err_t delay_ms(void *arg, unsigned ms)
static IRAM_ATTR esp_err_t delay_ms(void *arg, unsigned ms)
{
ets_delay_us(1000 * ms);
return ESP_OK;
}
const esp_flash_os_functions_t esp_flash_noos_functions = {
const DRAM_ATTR esp_flash_os_functions_t esp_flash_noos_functions = {
.start = start,
.end = end,
.delay_ms = delay_ms,
.region_protected = NULL,
};
esp_err_t IRAM_ATTR esp_flash_app_disable_os_functions(esp_flash_t* chip)
{
chip->os_func = &esp_flash_noos_functions;
return ESP_OK;
}