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Compute flash memory bounds depending on the partition if available.

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Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
2024-12-30 21:27:46 +01:00
parent 5508c082e5
commit 1d89c14268
2 changed files with 57 additions and 30 deletions
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33
src/fs/flash.c
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@@ -23,7 +23,7 @@
#define XIP_BASE 0
#define FLASH_SECTOR_SIZE 4096
#ifdef ESP_PLATFORM
#define PICO_FLASH_SIZE_BYTES (1 * 1024 * 1024)
uint32_t PICO_FLASH_SIZE_BYTES = (1 * 1024 * 1024);
#else
#define PICO_FLASH_SIZE_BYTES (8 * 1024 * 1024)
#endif
@@ -42,27 +42,12 @@
* | |
* ------------------------------------------------------
*/
#ifdef ESP_PLATFORM
#define FLASH_TARGET_OFFSET 0
#else
#define FLASH_TARGET_OFFSET (PICO_FLASH_SIZE_BYTES >> 1) // DATA starts at the mid of flash
#endif
#define FLASH_DATA_HEADER_SIZE (sizeof(uintptr_t) + sizeof(uint32_t))
#define FLASH_PERMANENT_REGION (4 * FLASH_SECTOR_SIZE) // 4 sectors (16kb) of permanent memory
//To avoid possible future allocations, data region starts at the end of flash and goes upwards to the center region
#ifdef PICO_RP2350
// Table partition for RP2350 needs 8kb
const uintptr_t end_flash = (XIP_BASE + PICO_FLASH_SIZE_BYTES - 2 * FLASH_SECTOR_SIZE);
#else
const uintptr_t end_flash = (XIP_BASE + PICO_FLASH_SIZE_BYTES);
#endif
const uintptr_t end_rom_pool = end_flash - FLASH_DATA_HEADER_SIZE - 4; //This is a fixed value. DO NOT CHANGE
const uintptr_t start_rom_pool = end_rom_pool - FLASH_PERMANENT_REGION; //This is a fixed value. DO NOT CHANGE
const uintptr_t end_data_pool = start_rom_pool - FLASH_DATA_HEADER_SIZE; //This is a fixed value. DO NOT CHANGE
const uintptr_t start_data_pool = (XIP_BASE + FLASH_TARGET_OFFSET);
uintptr_t end_flash, end_rom_pool, start_rom_pool, end_data_pool, start_data_pool;
extern int flash_program_block(uintptr_t addr, const uint8_t *data, size_t len);
extern int flash_program_halfword(uintptr_t addr, uint16_t data);
@@ -73,9 +58,19 @@ extern uint8_t *flash_read(uintptr_t addr);
extern void low_flash_available();
uintptr_t last_base = end_data_pool;
uintptr_t last_base;
uint32_t num_files = 0;
void flash_set_bounds(uintptr_t start, uintptr_t end) {
end_flash = end;
end_rom_pool = end_flash - FLASH_DATA_HEADER_SIZE - 4;
start_rom_pool = end_rom_pool - FLASH_PERMANENT_REGION;
end_data_pool = start_rom_pool - FLASH_DATA_HEADER_SIZE;
start_data_pool = start;
last_base = end_data_pool;
}
uintptr_t allocate_free_addr(uint16_t size, bool persistent) {
if (size > FLASH_SECTOR_SIZE) {
return 0x0; //ERROR