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HAL_ChibiOS: adjust dma reserve allocation 

use larger target and allow for smaller allocation
This commit is contained in:
Andrew Tridgell 2020-01-17 15:58:07 +11:00
parent 9554103418
commit 2b7bffa906
1 changed files with 10 additions and 4 deletions
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14
libraries/AP_HAL_ChibiOS/hwdef/common/malloc.c
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@ -59,7 +59,7 @@ static memory_heap_t heaps[NUM_MEMORY_REGIONS];
// size of memory reserved for dma-capable alloc
#ifndef DMA_RESERVE_SIZE
#define DMA_RESERVE_SIZE 4096
#define DMA_RESERVE_SIZE 6144
#endif
#if DMA_RESERVE_SIZE != 0
@ -81,9 +81,15 @@ void malloc_init(void)
create a DMA reserve heap, to ensure we keep some memory for DMA
safe memory allocations
*/
void *dma_reserve = malloc_dma(DMA_RESERVE_SIZE);
osalDbgAssert(dma_reserve != NULL, "DMA reserve");
chHeapObjectInit(&dma_reserve_heap, dma_reserve, DMA_RESERVE_SIZE);
uint32_t reserve_size = DMA_RESERVE_SIZE;
while (reserve_size > 0) {
void *dma_reserve = malloc_dma(reserve_size);
if (dma_reserve != NULL) {
chHeapObjectInit(&dma_reserve_heap, dma_reserve, reserve_size);
break;
}
reserve_size = (reserve_size * 7) / 8;
}
#endif
}