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esp32: cpu_start: read binary image header via cache

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When flash encryption is enabled, reading via cache also decrypts the
data, whereas spi_flash_read does not.

Closes https://github.com/espressif/esp-idf/issues/3907
This commit is contained in:
Ivan Grokhotkov 2019-08-15 16:20:37 +02:00
parent ad100e497a
commit fae124a2c1
1 changed files with 7 additions and 4 deletions
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11
components/esp32/cpu_start.c
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@ -444,10 +444,13 @@ void start_cpu0_default(void)
#endif
bootloader_flash_update_id();
#if !CONFIG_SPIRAM_BOOT_INIT // If psram is uninitialized, we need to improve some flash configuration.
esp_image_header_t fhdr;
const esp_partition_t *partition = esp_ota_get_running_partition();
spi_flash_read(partition->address, &fhdr, sizeof(esp_image_header_t));
#if !CONFIG_SPIRAM_BOOT_INIT
// Read the application binary image header. This will also decrypt the header if the image is encrypted.
esp_image_header_t fhdr = {0};
// This assumes that DROM is the first segment in the application binary, i.e. that we can read
// the binary header through cache by accessing SOC_DROM_LOW address.
memcpy(&fhdr, (void*) SOC_DROM_LOW, sizeof(fhdr));
// If psram is uninitialized, we need to improve some flash configuration.
bootloader_flash_clock_config(&fhdr);
bootloader_flash_gpio_config(&fhdr);
bootloader_flash_dummy_config(&fhdr);