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esp32: Allow SPIRAM_MALLOC_RESERVE_INTERNAL to span multiple regions of memory

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- Allocate this pool after main_task is running, so it can use startup stack RAM
- Raise the maximum allowed value in KConfig to 256KB
- Based on forum discussions https://esp32.com/viewtopic.php?f=2&t=6550&sid=76cd27bda76c6d0e83d3fcc9ec30c650&start=10#p28253
This commit is contained in:
Angus Gratton
2018-07-31 15:17:07 +10:00
committed by Angus Gratton
parent 9d2f7c60d9
commit 304e9085eb
3 changed files with 34 additions and 13 deletions
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25
components/esp32/spiram.c
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@@ -19,6 +19,7 @@ we add more types of external RAM memory, this can be made into a more intellige
#include <stdint.h>
#include <string.h>
#include <sys/param.h>
#include "sdkconfig.h"
#include "esp_attr.h"
@@ -138,12 +139,26 @@ esp_err_t esp_spiram_add_to_heapalloc()
static uint8_t *dma_heap;
esp_err_t esp_spiram_reserve_dma_pool(size_t size) {
if (size==0) return ESP_OK; //no-op
ESP_EARLY_LOGI(TAG, "Reserving pool of %dK of internal memory for DMA/internal allocations", size/1024);
dma_heap=heap_caps_malloc(size, MALLOC_CAP_DMA|MALLOC_CAP_INTERNAL);
if (!dma_heap) return ESP_ERR_NO_MEM;
uint32_t caps[]={MALLOC_CAP_DMA|MALLOC_CAP_INTERNAL, 0, MALLOC_CAP_8BIT|MALLOC_CAP_32BIT};
return heap_caps_add_region_with_caps(caps, (intptr_t) dma_heap, (intptr_t) dma_heap+size-1);
/* 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[] = { MALLOC_CAP_DMA|MALLOC_CAP_INTERNAL, 0, 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()