soc: espressif: Remove ESP heap and use heap adapter

Remove ESP heap from the sources. System heap is default heap.
Use heap adapter layer to configure used heap.
Use MEM_POOL memory request config to Wi-Fi and Bluetooth drivers.
Update the Wi-Fi and BLE memory needs.

Signed-off-by: Marek Matej <[email protected]>

Author: Marek Matej

drivers/bluetooth/hci/Kconfig.esp32

@@ -2,16 +2,19 @@
 
 if BT_ESP32
 
+config HEAP_MEM_POOL_ADD_SIZE_ESP_BT
+	int
+	default 25600 if ESP_BT_HEAP_SYSTEM
+	default 0
+	help
+	  Make sure there is a minimal heap available for BT driver.
+
 choice ESP_BT_HEAP
 	prompt "Bluetooth adapter heap in use"
-	default ESP_BT_HEAP_RUNTIME
-
-	config ESP_BT_HEAP_RUNTIME
-		bool "Bluetooth adapter use ESP runtime heap"
-		depends on ESP_HEAP_RUNTIME
+	default ESP_BT_HEAP_SYSTEM
 
 	config ESP_BT_HEAP_SYSTEM
-		bool "Bluetooth adapter use system heap"
+		bool "Bluetooth adapter use the kernel mempool heap (k_malloc)"
 
 endchoice # ESP_BT_HEAP
 

drivers/wifi/esp32/Kconfig.esp32

@@ -20,12 +20,22 @@ menuconfig WIFI_ESP32
 
 if WIFI_ESP32
 
-config HEAP_MEM_POOL_ADD_SIZE_WIFI
+config HEAP_MEM_POOL_ADD_SIZE_ESP_WIFI
 	int
-	default 4096
+	default 40960 if ESP_WIFI_HEAP_SYSTEM
+	default 0
 	help
 	  Make sure there is a minimal heap available for Wi-Fi driver.
 
+choice ESP_WIFI_HEAP
+	prompt "Wi-Fi adapter heap memory"
+	default ESP_WIFI_HEAP_SYSTEM
+
+	config ESP_WIFI_HEAP_SYSTEM
+		bool "Wi-Fi adapter use kernel mempool heap (k_malloc)"
+
+endchoice # ESP_WIFI_HEAP
+
 config NET_TCP_WORKQ_STACK_SIZE
 	default 2048
 
@@ -333,23 +343,6 @@ config ESP32_WIFI_SLP_DEFAULT_WAIT_BROADCAST_DATA_TIME
 	  before entering the sleep process. If a broadcast packet is received with more data bits, the time
 	  will refreshed. unit: milliseconds.
 
-choice ESP_WIFI_HEAP
-	prompt "Wifi adapter heap in use"
-	default ESP_WIFI_HEAP_RUNTIME
-
-	config ESP_WIFI_HEAP_RUNTIME
-		bool "Wifi adapter use ESP runtime heap"
-		depends on ESP_HEAP_RUNTIME
-
-	config ESP_WIFI_HEAP_SPIRAM
-		bool "Wifi adapter use SPIRAM heap"
-		depends on ESP_SPIRAM
-
-	config ESP_WIFI_HEAP_SYSTEM
-		bool "Wifi adapter use system heap"
-
-endchoice # ESP_WIFI_HEAP
-
 config ESP32_WIFI_FTM_ENABLE
 	bool "WiFi FTM"
 	default n

soc/espressif/common/CMakeLists.txt

@@ -4,6 +4,5 @@
 zephyr_include_directories(include)
 
 if(NOT CONFIG_MCUBOOT AND NOT CONFIG_SOC_ESP32_APPCPU AND NOT CONFIG_SOC_ESP32S3_APPCPU)
-  zephyr_sources_ifdef(CONFIG_ESP_HEAP_RUNTIME esp_heap_runtime.c)
   zephyr_sources_ifdef(CONFIG_ESP_SPIRAM esp_psram.c)
 endif()

soc/espressif/common/Kconfig

@@ -24,14 +24,6 @@ config ESP_SIMPLE_BOOT
 	  Please note that this method brings the system up with all memories set-up, but
 	  all other features, such as secure boot OTA or slots management are not available.
 
-config ESP_HEAP_RUNTIME
-	bool
-	default y
-	help
-	  Enabling this will allocate SRAM area starting from the last linked data at the symbolic `_end`,
-	  ending at the last memory location that can be safely accessed (depending on a boot mode).
-	  This is a memory pool used in runtime to create a new heap memory.
-
 config ESP32_TIMER_TASK_STACK_SIZE
 	int "Stack size of the high resolution ESP Timer"
 	default 4096

soc/espressif/common/esp_heap_runtime.c

@@ -74,6 +74,7 @@ static HDR_ATTR void (*_entry_point)(void) = &__start;
 esp_image_header_t WORD_ALIGNED_ATTR bootloader_image_hdr;
 extern uint32_t _image_irom_start, _image_irom_size, _image_irom_vaddr;
 extern uint32_t _image_drom_start, _image_drom_size, _image_drom_vaddr;
+extern uint32_t _libc_heap_size;
 
 #ifndef CONFIG_MCUBOOT
 static uint32_t _app_irom_start =
@@ -84,6 +85,7 @@ static uint32_t _app_drom_start =
 	(FIXED_PARTITION_OFFSET(slot0_partition) + (uint32_t)&_image_drom_start);
 static uint32_t _app_drom_size = (uint32_t)&_image_drom_size;
 
+static uint32_t libc_heap_size = (uint32_t)&_libc_heap_size;
 #endif
 
 static uint32_t _app_irom_vaddr = ((uint32_t)&_image_irom_vaddr);
@@ -260,7 +262,7 @@ void __start(void)
 			     ".option norelax\n"
 			     "la gp, __global_pointer$\n"
 			     ".option pop");
-#endif /* CONFIG_RISCV_GP */
+#endif
 
 #ifndef CONFIG_BOOTLOADER_MCUBOOT
 	/* Init fundamental components */
@@ -278,12 +280,14 @@ void __start(void)
 #ifndef CONFIG_SOC_SERIES_ESP32C2
 	/* Disable RNG entropy source as it was already used */
 	soc_random_disable();
-#endif /* CONFIG_SOC_SERIES_ESP32C2 */
+#endif
 #if defined(CONFIG_SOC_SERIES_ESP32S3) || defined(CONFIG_SOC_SERIES_ESP32C3)
 	/* Disable glitch detection as it can be falsely triggered by EMI interference */
 	ESP_EARLY_LOGI(TAG, "Disabling glitch detection");
 	ana_clock_glitch_reset_config(false);
-#endif /* CONFIG_SOC_SERIES_ESP32S2 */
-	ESP_EARLY_LOGI(TAG, "Jumping to the main image...");
+#endif
+#if !defined(CONFIG_MCUBOOT)
+	ESP_EARLY_LOGI(TAG, "libc heap size %d kB.", libc_heap_size / 1024);
+#endif
 	__esp_platform_start();
 }

soc/espressif/common/include/esp_heap_runtime.h

@@ -100,7 +100,9 @@ _rom_store_table = 0;
 PROVIDE(_memmap_vecbase_reset = 0x40000450);
 PROVIDE(_memmap_reset_vector = 0x40000400);
 
+/* Heap size calculations for PROCPU is also valid for AMP scenario */
 _heap_sentry = SRAM2_DRAM_END;
+_libc_heap_size = _heap_sentry - _end;
 
 SECTIONS
 {

soc/espressif/common/loader.c

@@ -72,7 +72,9 @@ _rom_store_table = 0;
 PROVIDE(_memmap_vecbase_reset = 0x40000450);
 PROVIDE(_memmap_reset_vector = 0x40000400);
 
+/* Heap size calculations for APPCPU */
 _heap_sentry = BOOTLOADER_DRAM_SEG_START + APPCPU_DRAM_SIZE;
+_libc_heap_size = _heap_sentry - _end;
 
 SECTIONS
 {

soc/espressif/esp32/default.ld

@@ -85,8 +85,9 @@ _rom_store_table = 0;
 
 _iram_dram_offset = IRAM_DRAM_OFFSET;
 
-/* Used as a pointer to the heap end */
+/* Heap size calculations */
 _heap_sentry = DRAM_RESERVED_START;
+_libc_heap_size = _heap_sentry - _end;
 
 SECTIONS
 {