/* Abstraction layer for spi-ram. For now, it's no more than a stub for the spiram_psram functions, but if we add more types of external RAM memory, this can be made into a more intelligent dispatcher. */ // Copyright 2015-2017 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. #include #include #include #include "sdkconfig.h" #include "esp_attr.h" #include "esp_err.h" #include "esp_spiram.h" #include "spiram_psram.h" #include "esp_log.h" #include "freertos/FreeRTOS.h" #include "freertos/xtensa_api.h" #include "soc/soc.h" #include "esp_heap_caps_init.h" #include "soc/soc_memory_layout.h" #include "soc/dport_reg.h" #include "rom/cache.h" #if CONFIG_FREERTOS_UNICORE #define PSRAM_MODE PSRAM_VADDR_MODE_NORMAL #else #if CONFIG_MEMMAP_SPIRAM_CACHE_EVENODD #define PSRAM_MODE PSRAM_VADDR_MODE_EVENODD #else #define PSRAM_MODE PSRAM_VADDR_MODE_LOWHIGH #endif #endif #if CONFIG_SPIRAM_SUPPORT static const char* TAG = "spiram"; #if CONFIG_SPIRAM_SPEED_40M && CONFIG_ESPTOOLPY_FLASHFREQ_40M #define PSRAM_SPEED PSRAM_CACHE_F40M_S40M #elif CONFIG_SPIRAM_SPEED_40M && CONFIG_ESPTOOLPY_FLASHFREQ_80M #define PSRAM_SPEED PSRAM_CACHE_F80M_S40M #elif CONFIG_SPIRAM_SPEED_80M && CONFIG_ESPTOOLPY_FLASHFREQ_80M #define PSRAM_SPEED PSRAM_CACHE_F80M_S80M #else #error "FLASH speed can only be equal to or higher than SRAM speed while SRAM is enabled!" #endif static bool spiram_inited=false; /* Simple RAM test. Writes a word every 32 bytes. Takes about a second to complete for 4MiB. Returns true when RAM seems OK, false when test fails. WARNING: Do not run this before the 2nd cpu has been initialized (in a two-core system) or after the heap allocator has taken ownership of the memory. */ bool esp_spiram_test() { volatile int *spiram=(volatile int*)SOC_EXTRAM_DATA_LOW; size_t p; size_t s=CONFIG_SPIRAM_SIZE; int errct=0; int initial_err=-1; for (p=0; p<(s/sizeof(int)); p+=8) { spiram[p]=p^0xAAAAAAAA; } for (p=0; p<(s/sizeof(int)); p+=8) { if (spiram[p]!=(p^0xAAAAAAAA)) { errct++; if (errct==1) initial_err=p*4; } } if (errct) { ESP_EARLY_LOGE(TAG, "SPI SRAM memory test fail. %d/%d writes failed, first @ %X\n", errct, s/32, initial_err+SOC_EXTRAM_DATA_LOW); return false; } else { ESP_EARLY_LOGI(TAG, "SPI SRAM memory test OK"); return true; } } void IRAM_ATTR esp_spiram_init_cache() { //Enable external RAM in MMU cache_sram_mmu_set( 0, 0, SOC_EXTRAM_DATA_LOW, 0, 32, 128 ); //Flush and enable icache for APP CPU #if !CONFIG_FREERTOS_UNICORE DPORT_CLEAR_PERI_REG_MASK(DPORT_APP_CACHE_CTRL1_REG, DPORT_APP_CACHE_MASK_DRAM1); cache_sram_mmu_set( 1, 0, SOC_EXTRAM_DATA_LOW, 0, 32, 128 ); #endif } esp_spiram_volt_t esp_spiram_get_chip_volt() { if (!spiram_inited) { ESP_LOGE(TAG, "SPI RAM not initialized"); return ESP_SPIRAM_VOLT_INVALID; } psram_volt_t volt = psram_get_volt(); switch (volt) { case PSRAM_VOLT_1V8: return ESP_SPIRAM_VOLT_1V8; case PSRAM_VOLT_3V3: return ESP_SPIRAM_VOLT_3V3; default: return ESP_SPIRAM_VOLT_INVALID; } } esp_spiram_size_t esp_spiram_get_chip_size() { if (!spiram_inited) { ESP_LOGE(TAG, "SPI RAM not initialized"); return ESP_SPIRAM_SIZE_INVALID; } psram_size_t psram_size = psram_get_size(); switch (psram_size) { case PSRAM_SIZE_32MBITS: return ESP_SPIRAM_SIZE_32MBITS; case PSRAM_SIZE_64MBITS: return ESP_SPIRAM_SIZE_64MBITS; default: return ESP_SPIRAM_SIZE_INVALID; } } esp_err_t esp_spiram_init() { esp_err_t r; r = psram_enable(PSRAM_SPEED, PSRAM_MODE); if (r != ESP_OK) { #if CONFIG_SPIRAM_IGNORE_NOTFOUND ESP_EARLY_LOGE(TAG, "SPI RAM enabled but initialization failed. Bailing out."); #endif return r; } ESP_EARLY_LOGI(TAG, "SPI RAM mode: %s", PSRAM_SPEED == PSRAM_CACHE_F40M_S40M ? "flash 40m sram 40m" : \ PSRAM_SPEED == PSRAM_CACHE_F80M_S40M ? "flash 80m sram 40m" : \ PSRAM_SPEED == PSRAM_CACHE_F80M_S80M ? "flash 80m sram 80m" : "ERROR"); ESP_EARLY_LOGI(TAG, "PSRAM initialized, cache is in %s mode.", \ (PSRAM_MODE==PSRAM_VADDR_MODE_EVENODD)?"even/odd (2-core)": \ (PSRAM_MODE==PSRAM_VADDR_MODE_LOWHIGH)?"low/high (2-core)": \ (PSRAM_MODE==PSRAM_VADDR_MODE_NORMAL)?"normal (1-core)":"ERROR"); spiram_inited=true; return ESP_OK; } esp_err_t esp_spiram_add_to_heapalloc() { ESP_EARLY_LOGI(TAG, "Adding pool of %dK of external SPI memory to heap allocator", CONFIG_SPIRAM_SIZE/1024); //Add entire external RAM region to heap allocator. Heap allocator knows the capabilities of this type of memory, so there's //no need to explicitly specify them. return heap_caps_add_region((intptr_t)SOC_EXTRAM_DATA_LOW, (intptr_t)SOC_EXTRAM_DATA_LOW + CONFIG_SPIRAM_SIZE-1); } static uint8_t *dma_heap; esp_err_t esp_spiram_reserve_dma_pool(size_t size) { ESP_EARLY_LOGI(TAG, "Reserving pool of %dK of internal memory for DMA/internal allocations", size/1024); /* Pool may be allocated in multiple non-contiguous chunks, depending on available RAM */ while (size > 0) { size_t next_size = heap_caps_get_largest_free_block(MALLOC_CAP_DMA|MALLOC_CAP_INTERNAL); next_size = MIN(next_size, size); ESP_EARLY_LOGD(TAG, "Allocating block of size %d bytes", next_size); dma_heap = heap_caps_malloc(next_size, MALLOC_CAP_DMA|MALLOC_CAP_INTERNAL); if (!dma_heap || next_size == 0) { return ESP_ERR_NO_MEM; } uint32_t caps[] = { 0, MALLOC_CAP_DMA|MALLOC_CAP_INTERNAL, MALLOC_CAP_8BIT|MALLOC_CAP_32BIT }; esp_err_t e = heap_caps_add_region_with_caps(caps, (intptr_t) dma_heap, (intptr_t) dma_heap+next_size-1); if (e != ESP_OK) { return e; } size -= next_size; } return ESP_OK; } size_t esp_spiram_get_size() { return CONFIG_SPIRAM_SIZE; } /* Before flushing the cache, if psram is enabled as a memory-mapped thing, we need to write back the data in the cache to the psram first, otherwise it will get lost. For now, we just read 64/128K of random PSRAM memory to do this. */ void IRAM_ATTR esp_spiram_writeback_cache() { int x; volatile int i=0; volatile uint8_t *psram=(volatile uint8_t*)SOC_EXTRAM_DATA_LOW; int cache_was_disabled=0; if (!spiram_inited) return; //We need cache enabled for this to work. Re-enable it if needed; make sure we //disable it again on exit as well. if (DPORT_REG_GET_BIT(DPORT_PRO_CACHE_CTRL_REG, DPORT_PRO_CACHE_ENABLE)==0) { cache_was_disabled|=(1<<0); DPORT_SET_PERI_REG_BITS(DPORT_PRO_CACHE_CTRL_REG, 1, 1, DPORT_PRO_CACHE_ENABLE_S); } #ifndef CONFIG_FREERTOS_UNICORE if (DPORT_REG_GET_BIT(DPORT_APP_CACHE_CTRL_REG, DPORT_APP_CACHE_ENABLE)==0) { cache_was_disabled|=(1<<1); DPORT_SET_PERI_REG_BITS(DPORT_APP_CACHE_CTRL_REG, 1, 1, DPORT_APP_CACHE_ENABLE_S); } #endif #if CONFIG_FREERTOS_UNICORE for (x=0; x<1024*64; x+=32) { i+=psram[x]; } #else /* Note: this assumes the amount of external RAM is >2M. If it is 2M or less, what this code does is undefined. If we ever support external RAM chips of 2M or smaller, this may need adjusting. */ for (x=0; x<1024*64; x+=32) { i+=psram[x]; i+=psram[x+(1024*1024*2)+(1024*64)]; //address picked to also clear cache of app cpu in low/high mode } #endif if (cache_was_disabled&(1<<0)) { while (DPORT_GET_PERI_REG_BITS2(DPORT_PRO_DCACHE_DBUG0_REG, DPORT_PRO_CACHE_STATE, DPORT_PRO_CACHE_STATE_S) != 1) ; DPORT_SET_PERI_REG_BITS(DPORT_PRO_CACHE_CTRL_REG, 1, 0, DPORT_PRO_CACHE_ENABLE_S); } #ifndef CONFIG_FREERTOS_UNICORE if (cache_was_disabled&(1<<1)) { while (DPORT_GET_PERI_REG_BITS2(DPORT_APP_DCACHE_DBUG0_REG, DPORT_APP_CACHE_STATE, DPORT_APP_CACHE_STATE_S) != 1); DPORT_SET_PERI_REG_BITS(DPORT_APP_CACHE_CTRL_REG, 1, 0, DPORT_APP_CACHE_ENABLE_S); } #endif } #endif