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https://github.com/trezor/trezor-firmware.git
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51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
#include "translations.h"
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#include <assert.h>
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#include <stdbool.h>
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#include <string.h>
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#include "common.h"
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#include "flash.h"
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#include "model.h"
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#include "mpu.h"
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#ifdef KERNEL_MODE
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bool translations_write(const uint8_t* data, uint32_t offset, uint32_t len) {
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uint32_t size = translations_area_bytesize();
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if (offset > size || size - offset < len) {
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return false;
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}
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mpu_mode_t mpu_mode = mpu_reconfig(MPU_MODE_ASSETS);
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ensure(flash_unlock_write(), "translations_write unlock");
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// todo consider alignment
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ensure(flash_area_write_data_padded(&TRANSLATIONS_AREA, offset, data, len,
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0xFF, FLASH_ALIGN(len)),
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"translations_write write");
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ensure(flash_lock_write(), "translations_write lock");
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mpu_restore(mpu_mode);
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return true;
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}
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const uint8_t* translations_read(uint32_t* len, uint32_t offset) {
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// TODO: _Static_assert was not happy with TRANSLATIONS_AREA.num_subareas == 1
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// error: expression in static assertion is not constant
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assert(TRANSLATIONS_AREA.num_subareas == 1);
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*len = flash_area_get_size(&TRANSLATIONS_AREA) - offset;
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return flash_area_get_address(&TRANSLATIONS_AREA, offset, 0);
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}
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void translations_erase(void) {
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mpu_mode_t mpu_mode = mpu_reconfig(MPU_MODE_ASSETS);
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ensure(flash_area_erase(&TRANSLATIONS_AREA, NULL), "translations erase");
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mpu_restore(mpu_mode);
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}
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uint32_t translations_area_bytesize(void) {
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return flash_area_get_size(&TRANSLATIONS_AREA);
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}
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#endif // KERNEL_MODE
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