Merge branch 'bugfix/fix_ram_app_mmu_issue' into 'master'

RAM APP: fixed cannot use external memory correctly issue

Closes IDF-7019 and IDF-7039

See merge request espressif/esp-idf!22682

components/bootloader_support/bootloader_flash/src/bootloader_flash.c

@@ -241,7 +241,7 @@ void bootloader_munmap(const void *mapping)
         mmu_init(0);
 #else
         cache_hal_disable(CACHE_TYPE_ALL);
-        mmu_hal_init();
+        mmu_hal_unmap_all();
 #endif
         mapped = false;
         current_read_mapping = UINT32_MAX;

components/bootloader_support/bootloader_flash/src/bootloader_flash_config_esp32h2.c

@@ -135,7 +135,7 @@ static void print_flash_info(const esp_image_header_t *bootloader_hdr)
         str = "16MHz";
         break;
     }
-    ESP_LOGI(TAG, "SPI Speed      : %s", str);
+    ESP_EARLY_LOGI(TAG, "SPI Speed      : %s", str);
 
     /* SPI mode could have been set to QIO during boot already,
        so test the SPI registers not the flash header */
@@ -153,7 +153,7 @@ static void print_flash_info(const esp_image_header_t *bootloader_hdr)
     } else {
         str = "SLOW READ";
     }
-    ESP_LOGI(TAG, "SPI Mode       : %s", str);
+    ESP_EARLY_LOGI(TAG, "SPI Mode       : %s", str);
 
     switch (bootloader_hdr->spi_size) {
     case ESP_IMAGE_FLASH_SIZE_1MB:
@@ -175,7 +175,7 @@ static void print_flash_info(const esp_image_header_t *bootloader_hdr)
         str = "2MB";
         break;
     }
-    ESP_LOGI(TAG, "SPI Flash Size : %s", str);
+    ESP_EARLY_LOGI(TAG, "SPI Flash Size : %s", str);
 }
 
 static void IRAM_ATTR bootloader_init_flash_configure(void)

components/bootloader_support/src/bootloader_utility.c

@@ -845,8 +845,8 @@ static void set_cache_and_start_app(
 #else
     cache_hal_disable(CACHE_TYPE_ALL);
 #endif
-
-    mmu_hal_init();
+    //reset MMU table first
+    mmu_hal_unmap_all();
 
     //-----------------------MAP DROM--------------------------
     uint32_t drom_load_addr_aligned = drom_load_addr & MMU_FLASH_MASK;

components/bootloader_support/src/esp32/bootloader_esp32.c

@@ -39,7 +39,7 @@
 
 static const char *TAG = "boot.esp32";
 
-#if !CONFIG_APP_BUILD_TYPE_RAM
+#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
 static void bootloader_reset_mmu(void)
 {
     /* completely reset MMU in case serial bootloader was running */
@@ -67,7 +67,7 @@ static void bootloader_reset_mmu(void)
     DPORT_REG_CLR_BIT(DPORT_APP_CACHE_CTRL1_REG, DPORT_APP_CACHE_MASK_DROM0);
 #endif
 }
-#endif //!CONFIG_APP_BUILD_TYPE_RAM
+#endif //#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
 
 static esp_err_t bootloader_check_rated_cpu_clock(void)
 {
@@ -208,7 +208,7 @@ esp_err_t bootloader_init(void)
     /* print 2nd bootloader banner */
     bootloader_print_banner();
 
-#if !CONFIG_APP_BUILD_TYPE_RAM
+#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
     // reset MMU
     bootloader_reset_mmu();
     // update flash ID
@@ -218,6 +218,7 @@ esp_err_t bootloader_init(void)
         ESP_LOGE(TAG, "failed when running XMC startup flow, reboot!");
         return ret;
     }
+#if !CONFIG_APP_BUILD_TYPE_RAM
     // read bootloader header
     if ((ret = bootloader_read_bootloader_header()) != ESP_OK) {
         return ret;
@@ -226,11 +227,12 @@ esp_err_t bootloader_init(void)
     if ((ret = bootloader_check_bootloader_validity()) != ESP_OK) {
         return ret;
     }
+#endif // #if !CONFIG_APP_BUILD_TYPE_RAM
     // initialize spi flash
     if ((ret = bootloader_init_spi_flash()) != ESP_OK) {
         return ret;
     }
-#endif // #if !CONFIG_APP_BUILD_TYPE_RAM
+#endif  //#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
 
     // check whether a WDT reset happend
     bootloader_check_wdt_reset();

components/bootloader_support/src/esp32c2/bootloader_esp32c2.c

@@ -38,7 +38,6 @@
 #include "esp_efuse.h"
 #include "hal/mmu_hal.h"
 #include "hal/cache_hal.h"
-#include "hal/mmu_ll.h"
 
 static const char *TAG = "boot.esp32c2";
 
@@ -110,15 +109,14 @@ esp_err_t bootloader_init(void)
     /* print 2nd bootloader banner */
     bootloader_print_banner();
 
-#if !CONFIG_APP_BUILD_TYPE_RAM
+#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
     //init cache hal
     cache_hal_init();
-    //reset mmu
+    //init mmu
     mmu_hal_init();
-    // config mmu page size
-    mmu_ll_set_page_size(0, SPI_FLASH_MMU_PAGE_SIZE);
     // update flash ID
     bootloader_flash_update_id();
+#if !CONFIG_APP_BUILD_TYPE_RAM
     // read bootloader header
     if ((ret = bootloader_read_bootloader_header()) != ESP_OK) {
         return ret;
@@ -127,11 +125,12 @@ esp_err_t bootloader_init(void)
     if ((ret = bootloader_check_bootloader_validity()) != ESP_OK) {
         return ret;
     }
+#endif // !CONFIG_APP_BUILD_TYPE_RAM
     // initialize spi flash
     if ((ret = bootloader_init_spi_flash()) != ESP_OK) {
         return ret;
     }
-#endif // !CONFIG_APP_BUILD_TYPE_RAM
+#endif  //#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
 
     // check whether a WDT reset happend
     bootloader_check_wdt_reset();

components/bootloader_support/src/esp32c3/bootloader_esp32c3.c

@@ -158,10 +158,10 @@ esp_err_t bootloader_init(void)
     /* print 2nd bootloader banner */
     bootloader_print_banner();
 
-#if !CONFIG_APP_BUILD_TYPE_RAM
+#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
     //init cache hal
     cache_hal_init();
-    //reset mmu
+    //init mmu
     mmu_hal_init();
     // update flash ID
     bootloader_flash_update_id();
@@ -170,6 +170,7 @@ esp_err_t bootloader_init(void)
         ESP_LOGE(TAG, "failed when running XMC startup flow, reboot!");
         return ret;
     }
+#if !CONFIG_APP_BUILD_TYPE_RAM
     // read bootloader header
     if ((ret = bootloader_read_bootloader_header()) != ESP_OK) {
         return ret;
@@ -178,11 +179,12 @@ esp_err_t bootloader_init(void)
     if ((ret = bootloader_check_bootloader_validity()) != ESP_OK) {
         return ret;
     }
+#endif  //#if !CONFIG_APP_BUILD_TYPE_RAM
     // initialize spi flash
     if ((ret = bootloader_init_spi_flash()) != ESP_OK) {
         return ret;
     }
-#endif // !CONFIG_APP_BUILD_TYPE_RAM
+#endif // !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
 
     // check whether a WDT reset happend
     bootloader_check_wdt_reset();

components/bootloader_support/src/esp32c6/bootloader_esp32c6.c

@@ -40,7 +40,6 @@
 #include "esp_private/bootloader_flash_internal.h"
 #include "esp_efuse.h"
 #include "hal/mmu_hal.h"
-#include "hal/mmu_ll.h"
 #include "hal/cache_hal.h"
 #include "hal/clk_tree_ll.h"
 #include "soc/lp_wdt_reg.h"
@@ -166,13 +165,11 @@ esp_err_t bootloader_init(void)
     /* print 2nd bootloader banner */
     bootloader_print_banner();
 
-#if !CONFIG_APP_BUILD_TYPE_RAM
+#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
     //init cache hal
     cache_hal_init();
-    //reset mmu
+    //init mmu
     mmu_hal_init();
-    // config mmu page size
-    mmu_ll_set_page_size(0, SPI_FLASH_MMU_PAGE_SIZE);
     // update flash ID
     bootloader_flash_update_id();
     // Check and run XMC startup flow
@@ -180,6 +177,7 @@ esp_err_t bootloader_init(void)
         ESP_LOGE(TAG, "failed when running XMC startup flow, reboot!");
         return ret;
     }
+#if !CONFIG_APP_BUILD_TYPE_RAM
     // read bootloader header
     if ((ret = bootloader_read_bootloader_header()) != ESP_OK) {
         return ret;
@@ -188,11 +186,12 @@ esp_err_t bootloader_init(void)
     if ((ret = bootloader_check_bootloader_validity()) != ESP_OK) {
         return ret;
     }
+#endif // !CONFIG_APP_BUILD_TYPE_RAM
     // initialize spi flash
     if ((ret = bootloader_init_spi_flash()) != ESP_OK) {
         return ret;
     }
-#endif // !CONFIG_APP_BUILD_TYPE_RAM
+#endif // #if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
 
     // check whether a WDT reset happend
     bootloader_check_wdt_reset();

components/bootloader_support/src/esp32h2/bootloader_esp32h2.c

@@ -40,7 +40,6 @@
 #include "esp_private/bootloader_flash_internal.h"
 #include "esp_efuse.h"
 #include "hal/mmu_hal.h"
-#include "hal/mmu_ll.h"
 #include "hal/cache_hal.h"
 #include "soc/lp_wdt_reg.h"
 #include "hal/efuse_hal.h"
@@ -156,13 +155,11 @@ esp_err_t bootloader_init(void)
     /* print 2nd bootloader banner */
     bootloader_print_banner();
 
-#if !CONFIG_APP_BUILD_TYPE_RAM
+#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
     //init cache hal
     cache_hal_init();
-    //reset mmu
+    //init mmu
     mmu_hal_init();
-    // config mmu page size
-    mmu_ll_set_page_size(0, SPI_FLASH_MMU_PAGE_SIZE);
     // update flash ID
     bootloader_flash_update_id();
     // Check and run XMC startup flow
@@ -170,6 +167,7 @@ esp_err_t bootloader_init(void)
         ESP_LOGE(TAG, "failed when running XMC startup flow, reboot!");
         return ret;
     }
+#if !CONFIG_APP_BUILD_TYPE_RAM
     // read bootloader header
     if ((ret = bootloader_read_bootloader_header()) != ESP_OK) {
         return ret;
@@ -178,11 +176,12 @@ esp_err_t bootloader_init(void)
     if ((ret = bootloader_check_bootloader_validity()) != ESP_OK) {
         return ret;
     }
+#endif // !CONFIG_APP_BUILD_TYPE_RAM
     // initialize spi flash
     if ((ret = bootloader_init_spi_flash()) != ESP_OK) {
         return ret;
     }
-#endif // !CONFIG_APP_BUILD_TYPE_RAM
+#endif  //#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
 
     // check whether a WDT reset happend
     bootloader_check_wdt_reset();

components/bootloader_support/src/esp32h4/bootloader_esp32h4.c

@@ -117,10 +117,10 @@ esp_err_t bootloader_init(void)
     /* print 2nd bootloader banner */
     bootloader_print_banner();
 
-#if !CONFIG_APP_BUILD_TYPE_RAM
+#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
     //init cache hal
     cache_hal_init();   //TODO IDF-4649
-    //reset mmu
+    //init mmu
     mmu_hal_init();
     // update flash ID
     bootloader_flash_update_id();
@@ -129,6 +129,7 @@ esp_err_t bootloader_init(void)
         ESP_LOGE(TAG, "failed when running XMC startup flow, reboot!");
         return ret;
     }
+#if !CONFIG_APP_BUILD_TYPE_RAM
     // read bootloader header
     if ((ret = bootloader_read_bootloader_header()) != ESP_OK) {
         return ret;
@@ -137,11 +138,12 @@ esp_err_t bootloader_init(void)
     if ((ret = bootloader_check_bootloader_validity()) != ESP_OK) {
         return ret;
     }
+#endif // !CONFIG_APP_BUILD_TYPE_RAM
     // initialize spi flash
     if ((ret = bootloader_init_spi_flash()) != ESP_OK) {
         return ret;
     }
-#endif // !CONFIG_APP_BUILD_TYPE_RAM
+#endif // #if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
 
     // check whether a WDT reset happend
     bootloader_check_wdt_reset();

components/bootloader_support/src/esp32s2/bootloader_esp32s2.c

@@ -139,10 +139,10 @@ esp_err_t bootloader_init(void)
     /* print 2nd bootloader banner */
     bootloader_print_banner();
 
-#if !CONFIG_APP_BUILD_TYPE_RAM
+#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
     // init cache hal
     cache_hal_init();
-    // reset mmu
+    //init mmu
     mmu_hal_init();
     // Workaround: normal ROM bootloader exits with DROM0 cache unmasked, but 2nd bootloader exits with it masked.
     REG_CLR_BIT(EXTMEM_PRO_ICACHE_CTRL1_REG, EXTMEM_PRO_ICACHE_MASK_DROM0);
@@ -153,6 +153,7 @@ esp_err_t bootloader_init(void)
         ESP_LOGE(TAG, "failed when running XMC startup flow, reboot!");
         return ret;
     }
+#if !CONFIG_APP_BUILD_TYPE_RAM
     // read bootloader header
     if ((ret = bootloader_read_bootloader_header()) != ESP_OK) {
         return ret;
@@ -161,11 +162,12 @@ esp_err_t bootloader_init(void)
     if ((ret = bootloader_check_bootloader_validity()) != ESP_OK) {
         return ret;
     }
+#endif // !CONFIG_APP_BUILD_TYPE_RAM
     // initialize spi flash
     if ((ret = bootloader_init_spi_flash()) != ESP_OK) {
         return ret;
     }
-#endif // !CONFIG_APP_BUILD_TYPE_RAM
+#endif // #if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
 
     // check whether a WDT reset happend
     bootloader_check_wdt_reset();

components/bootloader_support/src/esp32s3/bootloader_esp32s3.c

@@ -177,10 +177,10 @@ esp_err_t bootloader_init(void)
     /* print 2nd bootloader banner */
     bootloader_print_banner();
 
-#if !CONFIG_APP_BUILD_TYPE_RAM
+#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
     //init cache hal
     cache_hal_init();
-    //reset mmu
+    //init mmu
     mmu_hal_init();
     // update flash ID
     bootloader_flash_update_id();
@@ -189,6 +189,7 @@ esp_err_t bootloader_init(void)
         ESP_LOGE(TAG, "failed when running XMC startup flow, reboot!");
         return ret;
     }
+#if !CONFIG_APP_BUILD_TYPE_RAM
     // read bootloader header
     if ((ret = bootloader_read_bootloader_header()) != ESP_OK) {
         return ret;
@@ -197,11 +198,12 @@ esp_err_t bootloader_init(void)
     if ((ret = bootloader_check_bootloader_validity()) != ESP_OK) {
         return ret;
     }
+#endif // !CONFIG_APP_BUILD_TYPE_RAM
     // initialize spi flash
     if ((ret = bootloader_init_spi_flash()) != ESP_OK) {
         return ret;
     }
-#endif // !CONFIG_APP_BUILD_TYPE_RAM
+#endif // #if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
 
     // check whether a WDT reset happend
     bootloader_check_wdt_reset();

components/esp_rom/esp32c2/Kconfig.soc_caps.in

@@ -58,3 +58,7 @@ config ESP_ROM_HAS_NEWLIB_NANO_FORMAT
 config ESP_ROM_NEEDS_SET_CACHE_MMU_SIZE
     bool
     default y
+
+config ESP_ROM_RAM_APP_NEEDS_MMU_INIT
+    bool
+    default y

components/esp_rom/esp32c2/esp_rom_caps.h

@@ -20,3 +20,4 @@
 #define ESP_ROM_HAS_SPI_FLASH               (1) // ROM has the implementation of SPI Flash driver
 #define ESP_ROM_HAS_NEWLIB_NANO_FORMAT      (1) // ROM has the newlib nano version of formatting functions
 #define ESP_ROM_NEEDS_SET_CACHE_MMU_SIZE    (1) // ROM needs to set cache MMU size according to instruction and rodata for flash mmap
+#define ESP_ROM_RAM_APP_NEEDS_MMU_INIT      (1) // ROM doesn't init cache MMU when it's a RAM APP, needs MMU hal to init

components/esp_rom/esp32c3/Kconfig.soc_caps.in

@@ -62,3 +62,7 @@ config ESP_ROM_HAS_NEWLIB_NANO_FORMAT
 config ESP_ROM_NEEDS_SET_CACHE_MMU_SIZE
     bool
     default y
+
+config ESP_ROM_RAM_APP_NEEDS_MMU_INIT
+    bool
+    default y

components/esp_rom/esp32c3/esp_rom_caps.h

@@ -21,3 +21,4 @@
 #define ESP_ROM_HAS_ETS_PRINTF_BUG          (1) // ROM has ets_printf bug when disable the ROM log either by eFuse or RTC storage register
 #define ESP_ROM_HAS_NEWLIB_NANO_FORMAT      (1) // ROM has the newlib nano version of formatting functions
 #define ESP_ROM_NEEDS_SET_CACHE_MMU_SIZE    (1) // ROM needs to set cache MMU size according to instruction and rodata for flash mmap
+#define ESP_ROM_RAM_APP_NEEDS_MMU_INIT      (1) // ROM doesn't init cache MMU when it's a RAM APP, needs MMU hal to init

components/esp_rom/esp32c6/Kconfig.soc_caps.in

@@ -74,3 +74,7 @@ config ESP_ROM_WDT_INIT_PATCH
 config ESP_ROM_NEEDS_SET_CACHE_MMU_SIZE
     bool
     default y
+
+config ESP_ROM_RAM_APP_NEEDS_MMU_INIT
+    bool
+    default y

components/esp_rom/esp32c6/esp_rom_caps.h

@@ -24,3 +24,4 @@
 #define ESP_ROM_REV0_HAS_NO_ECDSA_INTERFACE (1) // ECO 0 does not have ets_ecdsa_verify symbol, future revision will have it
 #define ESP_ROM_WDT_INIT_PATCH              (1) // ROM version does not configure the clock
 #define ESP_ROM_NEEDS_SET_CACHE_MMU_SIZE    (1) // ROM needs to set cache MMU size according to instruction and rodata for flash mmap
+#define ESP_ROM_RAM_APP_NEEDS_MMU_INIT      (1) // ROM doesn't init cache MMU when it's a RAM APP, needs MMU hal to init

components/esp_rom/esp32h2/Kconfig.soc_caps.in

@@ -62,3 +62,7 @@ config ESP_ROM_WDT_INIT_PATCH
 config ESP_ROM_NEEDS_SET_CACHE_MMU_SIZE
     bool
     default y
+
+config ESP_ROM_RAM_APP_NEEDS_MMU_INIT
+    bool
+    default y

components/esp_rom/esp32h2/esp_rom_caps.h

@@ -21,3 +21,4 @@
 #define ESP_ROM_HAS_NEWLIB_NANO_FORMAT      (1) // ROM has the newlib nano versions of formatting functions
 #define ESP_ROM_WDT_INIT_PATCH              (1) // ROM version does not configure the clock
 #define ESP_ROM_NEEDS_SET_CACHE_MMU_SIZE    (1) // ROM needs to set cache MMU size according to instruction and rodata for flash mmap
+#define ESP_ROM_RAM_APP_NEEDS_MMU_INIT      (1) // ROM doesn't init cache MMU when it's a RAM APP, needs MMU hal to init

components/esp_rom/esp32h4/Kconfig.soc_caps.in

@@ -54,3 +54,7 @@ config ESP_ROM_HAS_NEWLIB_NANO_FORMAT
 config ESP_ROM_NEEDS_SET_CACHE_MMU_SIZE
     bool
     default y
+
+config ESP_ROM_RAM_APP_NEEDS_MMU_INIT
+    bool
+    default y

components/esp_rom/esp32h4/esp_rom_caps.h

@@ -19,3 +19,4 @@
 #define ESP_ROM_HAS_ETS_PRINTF_BUG          (1) // ROM has ets_printf bug when disable the ROM log either by eFuse or RTC storage register
 #define ESP_ROM_HAS_NEWLIB_NANO_FORMAT      (1) // ROM has the newlib nano version of formatting functions
 #define ESP_ROM_NEEDS_SET_CACHE_MMU_SIZE    (1) // ROM needs to set cache MMU size according to instruction and rodata for flash mmap
+#define ESP_ROM_RAM_APP_NEEDS_MMU_INIT      (1) // ROM doesn't init cache MMU when it's a RAM APP, needs MMU hal to init

components/esp_rom/esp32s3/Kconfig.soc_caps.in

@@ -66,3 +66,7 @@ config ESP_ROM_HAS_NEWLIB_NANO_FORMAT
 config ESP_ROM_NEEDS_SET_CACHE_MMU_SIZE
     bool
     default y
+
+config ESP_ROM_RAM_APP_NEEDS_MMU_INIT
+    bool
+    default y

components/esp_rom/esp32s3/esp_rom_caps.h

@@ -22,3 +22,4 @@
 #define ESP_ROM_HAS_ETS_PRINTF_BUG          (1) // ROM has ets_printf bug when disable the ROM log either by eFuse or RTC storage register
 #define ESP_ROM_HAS_NEWLIB_NANO_FORMAT      (1) // ROM has the newlib nano version of formatting functions
 #define ESP_ROM_NEEDS_SET_CACHE_MMU_SIZE    (1) // ROM needs to set cache MMU size according to instruction and rodata for flash mmap
+#define ESP_ROM_RAM_APP_NEEDS_MMU_INIT      (1) // ROM doesn't init cache MMU when it's a RAM APP, needs MMU hal to init

components/esp_rom/include/esp32c2/rom/cache.h

@@ -269,6 +269,15 @@ void Cache_Occupy_ICache_MEMORY(cache_array_t icache_low);
   */
 void Cache_Get_Mode(struct cache_mode * mode);
 
+/**
+  * @brief Init Cache for ROM boot, including resetting the Icache, initializing Owner, MMU, setting ICache mode, Enabling ICache, unmasking bus.
+  *
+  * @param None
+  *
+  * @return None
+  */
+void ROM_Boot_Cache_Init(void);
+
 /**
   * @brief Init mmu owner register to make i/d cache use half mmu entries.
   *

components/esp_rom/include/esp32c3/rom/cache.h

@@ -269,6 +269,15 @@ void Cache_Occupy_ICache_MEMORY(cache_array_t icache_low);
   */
 void Cache_Get_Mode(struct cache_mode * mode);
 
+/**
+  * @brief Init Cache for ROM boot, including resetting the Icache, initializing Owner, MMU, setting ICache mode, Enabling ICache, unmasking bus.
+  *
+  * @param None
+  *
+  * @return None
+  */
+void ROM_Boot_Cache_Init(void);
+
 /**
   * @brief Init mmu owner register to make i/d cache use half mmu entries.
   *

components/esp_rom/include/esp32c6/rom/cache.h

@@ -165,6 +165,15 @@ extern const cache_op_cb_t* rom_cache_op_cb;
   */
 void Cache_MMU_Init(void);
 
+/**
+  * @brief Init Cache for ROM boot, including resetting the Icache, initializing MMU, Enabling ICache, unmasking bus.
+  *
+  * @param None
+  *
+  * @return None
+  */
+void ROM_Boot_Cache_Init(void);
+
 /**
   * @brief Set ICache mmu mapping.
   *        Please do not call this function in your SDK application.

components/esp_rom/include/esp32h2/rom/cache.h

@@ -169,6 +169,15 @@ extern const cache_op_cb_t* rom_cache_op_cb;
   */
 void Cache_MMU_Init(void);
 
+/**
+  * @brief Init Cache for ROM boot, including resetting the Icache, initializing MMU, Enabling ICache, unmasking bus.
+  *
+  * @param None
+  *
+  * @return None
+  */
+void ROM_Boot_Cache_Init(void);
+
 /**
   * @brief Set ICache mmu mapping.
   *        Please do not call this function in your SDK application.

components/esp_rom/include/esp32h4/rom/cache.h

@@ -269,6 +269,15 @@ void Cache_Occupy_ICache_MEMORY(cache_array_t icache_low);
   */
 void Cache_Get_Mode(struct cache_mode * mode);
 
+/**
+  * @brief Init Cache for ROM boot, including resetting the Icache, initializing Owner, MMU, setting ICache mode, Enabling ICache, unmasking bus.
+  *
+  * @param None
+  *
+  * @return None
+  */
+void ROM_Boot_Cache_Init(void);
+
 /**
   * @brief Init mmu owner register to make i/d cache use half mmu entries.
   *

components/esp_rom/include/esp32s3/rom/cache.h

@@ -391,6 +391,15 @@ uint32_t Cache_Address_Through_DCache(uint32_t addr);
   *
   * @return None
   */
+void ROM_Boot_Cache_Init(void);
+
+/**
+  * @brief Init mmu owner register to make i/d cache use half mmu entries.
+  *
+  * @param None
+  *
+  * @return None
+  */
 void Cache_Owner_Init(void);
 
 /**

components/esp_system/port/cpu_start.c

@@ -316,8 +316,15 @@ void IRAM_ATTR call_start_cpu0(void)
     // When the APP is loaded into ram for execution, some hardware initialization behaviors
     // in the bootloader are still necessary
 #if CONFIG_APP_BUILD_TYPE_RAM
-    bootloader_init();
+#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
+#if SOC_SPI_MEM_SUPPORT_CONFIG_GPIO_BY_EFUSE
+    esp_rom_spiflash_attach(esp_rom_efuse_get_flash_gpio_info(), false);
+#else
+    esp_rom_spiflash_attach(0, false);
 #endif
+#endif  //#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
+    bootloader_init();
+#endif  //#if CONFIG_APP_BUILD_TYPE_RAM
 
 #ifndef CONFIG_BOOTLOADER_WDT_ENABLE
     // from panic handler we can be reset by RWDT or TG0WDT
@@ -593,12 +600,6 @@ void IRAM_ATTR call_start_cpu0(void)
     fhdr.spi_speed = ESP_IMAGE_SPI_SPEED_DIV_2;
     fhdr.spi_size = ESP_IMAGE_FLASH_SIZE_4MB;
 
-    extern void esp_rom_spiflash_attach(uint32_t, bool);
-#if SOC_SPI_MEM_SUPPORT_CONFIG_GPIO_BY_EFUSE
-    esp_rom_spiflash_attach(esp_rom_efuse_get_flash_gpio_info(), false);
-#else
-    esp_rom_spiflash_attach(0, false);
-#endif
     bootloader_flash_unlock();
 #else
     // This assumes that DROM is the first segment in the application binary, i.e. that we can read

components/hal/include/hal/mmu_hal.h

@@ -14,10 +14,15 @@ extern "C" {
 #endif
 
 /**
- * Unmap all the MMU table. After this all external memory vaddr are not available
+ * MMU Hal layer initialisation
  */
 void mmu_hal_init(void);
 
+/**
+ * Unmap all the MMU table. After this all external memory vaddr are not available
+ */
+void mmu_hal_unmap_all(void);
+
 /**
  * Helper functions to convert the MMU page numbers into bytes. e.g.:
  * - When MMU page size is 16KB, page_num = 2 will be converted into 32KB

components/hal/mmu_hal.c

@@ -12,8 +12,18 @@
 #include "hal/assert.h"
 #include "hal/mmu_hal.h"
 #include "hal/mmu_ll.h"
+#include "rom/cache.h"
 
 void mmu_hal_init(void)
+{
+#if CONFIG_ESP_ROM_RAM_APP_NEEDS_MMU_INIT
+    ROM_Boot_Cache_Init();
+#endif
+    mmu_ll_set_page_size(0, CONFIG_MMU_PAGE_SIZE);
+    mmu_hal_unmap_all();
+}
+
+void mmu_hal_unmap_all(void)
 {
     mmu_ll_unmap_all(0);
 #if !CONFIG_FREERTOS_UNICORE

tools/test_apps/system/ram_loadable_app/conftest.py

@@ -1,22 +0,0 @@
-# SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
-# SPDX-License-Identifier: Apache-2.0
-
-# pylint: disable=W0621  # redefined-outer-name
-
-import pytest
-from _pytest.fixtures import FixtureRequest
-from _pytest.monkeypatch import MonkeyPatch
-from test_ram_loadable_app_util.loadable_app_serial import LoadableAppSerial
-
-
-@pytest.fixture(scope='module')
-def monkeypatch_module(request: FixtureRequest) -> MonkeyPatch:
-    mp = MonkeyPatch()
-    request.addfinalizer(mp.undo)
-    return mp
-
-
-@pytest.fixture(scope='module', autouse=True)
-def replace_dut_class(monkeypatch_module: MonkeyPatch) -> None:
-    monkeypatch_module.setattr('pytest_embedded_idf.serial.IdfSerial', LoadableAppSerial)
-    monkeypatch_module.setattr('pytest_embedded_idf.IdfSerial', LoadableAppSerial)

tools/test_apps/system/ram_loadable_app/main/CMakeLists.txt

@@ -1,2 +1,2 @@
-idf_component_register(SRCS "ram_loadable_app_example_main.c"
+idf_component_register(SRCS "ram_loadable_app_test.c"
                     INCLUDE_DIRS "")

tools/test_apps/system/ram_loadable_app/main/ram_loadable_app_example_main.c → tools/test_apps/system/ram_loadable_app/main/ram_loadable_app_test.c

@@ -10,6 +10,32 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "esp_chip_info.h"
+#include "hal/mmu_hal.h"
+#include "soc/soc.h"
+
+#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
+
+#define TEST_SIZE     CONFIG_MMU_PAGE_SIZE
+#define TEST_PADDR    0x10000
+#define TEST_VADDR    SOC_DROM_LOW
+
+static void s_test_ext_vaddr(void)
+{
+    uint32_t actual_mapped_len = 0;
+    mmu_hal_map_region(0, MMU_TARGET_FLASH0, TEST_VADDR, TEST_PADDR, TEST_SIZE, &actual_mapped_len);
+    printf("actual_mapped_len is 0x%"PRIx32" bytes\n", actual_mapped_len);
+
+    /**
+     * we should work here, without any other Cache/MMU configs
+     * If you found here we need some Cache/MMU configs, you should fix it in the driver
+     */
+    for (int i = 0; i < TEST_SIZE; i = i+4) {
+        volatile uint32_t my_var = *(uint32_t *)(TEST_VADDR + i);
+        //we actually don't care the value, but we need to make sure above line won't lead to Cache/MMU error
+        assert(my_var || my_var == 0);
+    }
+}
+#endif //#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
 
 void app_main(void)
 {
@@ -24,12 +50,14 @@ void app_main(void)
            chip_info.cores,
            (chip_info.features & CHIP_FEATURE_BT) ? "/BT" : "",
            (chip_info.features & CHIP_FEATURE_BLE) ? "/BLE" : "");
-
     printf("silicon revision %d, ", chip_info.revision);
-
     printf("Minimum free heap size: %"PRIu32" bytes\n", esp_get_minimum_free_heap_size());
-
     printf("App is running in RAM !\n");
+
+#if !CONFIG_APP_BUILD_TYPE_PURE_RAM_APP
+    s_test_ext_vaddr();
+#endif
+
     uint32_t uptime = 0;
     while (1) {
         printf("Time since boot: %"PRIu32" seconds...\n", uptime++);

tools/test_apps/system/ram_loadable_app/test_ram_loadable_app_util/loadable_app_serial.py

@@ -1,54 +0,0 @@
-# SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
-# SPDX-License-Identifier: Unlicense OR CC0-1.0
-import logging
-from typing import Any, Optional
-
-import esptool
-from pytest_embedded_idf.app import IdfApp
-from pytest_embedded_serial_esp.serial import EspSerial, EsptoolArgs
-
-
-class LoadableAppSerial(EspSerial):
-    def __init__(
-        self,
-        app: IdfApp,
-        target: Optional[str] = None,
-        **kwargs: Any,
-    ) -> None:
-        self.app = app
-        self.app.bin_file = self.app._get_bin_file()
-
-        if not hasattr(self.app, 'target'):
-            raise ValueError(f'Idf app not parsable. Please check if it\'s valid: {self.app.binary_path}')
-
-        if target and self.app.target and self.app.target != target:
-            raise ValueError(f'Targets do not match. App target: {self.app.target}, Cmd target: {target}.')
-
-        super().__init__(
-            target=target or app.target,
-            **kwargs,
-        )
-
-    def _start(self) -> None:
-        self.load_ram()
-
-    @EspSerial.use_esptool(hard_reset_after=False, no_stub=True)
-    def load_ram(self) -> None:
-        if not self.app.bin_file:
-            logging.error('No image file detected. Skipping load ram...')
-            return
-
-        f_bin_file = open(self.app.bin_file, 'rb')
-
-        default_kwargs = {
-            'filename': f_bin_file,
-            'chip': self.esp.CHIP_NAME.lower().replace('-', ''),
-        }
-
-        load_ram_args = EsptoolArgs(**default_kwargs)
-
-        try:
-            self.esp.change_baud(460800)
-            esptool.load_ram(self.esp, load_ram_args)
-        finally:
-            f_bin_file.close()