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esp-idf/components/bootloader_support/include_priv
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Angus Gratton 17adb40ca8 bootloader: Calculate SHA256 hash of image on every boot 
Makes app image booting more reliable (256-bit rather than 8-bit verification.)

Some measurements, time to boot a 655KB app.bin file and run to app_main() execution.

(All for rev 1 silicon, ie no 340ms spurious WDT delay.)

80MHz QIO mode:
before = 300ms
after = 140ms

40MHz DIO mode:
before = 712ms
after = 577ms

40MHz DIO mode, secure boot enabled
before = 1380ms
after = 934ms

(Secure boot involves two ECC signature verifications (partition table, app) that take approx 300ms each with 80MHz CPU.)
2017-07-19 18:31:59 +10:00
..
bootloader_flash.h Flash encryption: Support enabling flash encryption in bootloader, app support 2016-12-01 23:49:12 -08:00
bootloader_random.h bootloader: Enable early boot RNG entropy source 2017-01-04 17:07:12 +11:00
bootloader_sha.h bootloader: Calculate SHA256 hash of image on every boot 2017-07-19 18:31:59 +10:00