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Bugfix: ota fails with secure boot on for image size greater than 3.2MB

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When an OTA image size is larger than 50 MMU pages (approx. 3.2 MB), secure_boot_generate fails while trying to map it into memory:
https://gitlab.espressif.cn:6688/idf/esp-idf/blob/master/components/bootloader_support/src/esp32/secure_boot.c#L72
Instead of trying to map the whole image, secure boot code should split the image into chunks and map them one by one, like it is done in esp_image_format.c:
https://gitlab.espressif.cn:6688/idf/esp-idf/blob/master/components/bootloader_support/src/esp_image_format.c#L372

Closes https://jira.espressif.com:8443/browse/IDF-709

Signed-off-by: Vikram Dattu <vikram.dattu@espressif.com>
This commit is contained in:
Vikram Dattu
2019-06-15 15:13:51 +05:30
committed by bot
parent bca4afb466
commit eb99b27f2e
3 changed files with 59 additions and 11 deletions
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15
components/bootloader_support/src/bootloader_flash.c
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@@ -25,6 +25,11 @@ static const char *TAG = "bootloader_mmap";
static spi_flash_mmap_handle_t map;
uint32_t bootloader_mmap_get_free_pages()
{
return spi_flash_mmap_get_free_pages(SPI_FLASH_MMAP_DATA);
}
const void *bootloader_mmap(uint32_t src_addr, uint32_t size)
{
if (map) {
@@ -91,12 +96,22 @@ static const char *TAG = "bootloader_flash";
*/
#define MMU_BLOCK0_VADDR 0x3f400000
#define MMU_BLOCK50_VADDR 0x3f720000
#define MMU_FREE_PAGES ((MMU_BLOCK50_VADDR - MMU_BLOCK0_VADDR) / FLASH_BLOCK_SIZE)
static bool mapped;
// Current bootloader mapping (ab)used for bootloader_read()
static uint32_t current_read_mapping = UINT32_MAX;
uint32_t bootloader_mmap_get_free_pages()
{
/**
* Allow mapping up to 50 of the 51 available MMU blocks (last one used for reads)
* Since, bootloader_mmap function below assumes it to be 0x320000 (50 pages), we can safely do this.
*/
return MMU_FREE_PAGES;
}
const void *bootloader_mmap(uint32_t src_addr, uint32_t size)
{
if (mapped) {