Commit graph

7 commits

Author SHA1 Message Date
Angus Gratton
871ba41a09 bootloader: Remove unnecessary KEEP on data/bss sections, save static RAM 2017-07-19 18:31:59 +10:00
Angus Gratton
d1b66a08c1 bootloader: Add option to build with Link Time Optimisation enabled 2017-07-19 18:31:59 +10:00
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
Angus Gratton
0c8888d68f bootloader: Combine loading from flash & verifying to save boot time
Still needs updating to account for secure boot.
2017-07-19 18:25:17 +10:00
Angus Gratton
ec64fa3416 bootloader flash QIO mode: Restore DIO/DOUT mode if enabling quad fails
Previously, flash was degraded to single I/O mode.
2017-07-19 15:04:09 +10:00
Angus Gratton
0715d1f8c1 bootloader: When customising SPI flash pins in efuse, set WP pin in menuconfig
Allows custom configurations for QIO/QOUT mode.
2017-07-19 15:04:08 +10:00
Angus Gratton
d664e32394 build system: Use component.mk for all components, refactor bootloader build
For config-only components, component.mk should now contain "COMPONENT_CONFIG_ONLY := 1"

Also refactored some of the generation of linker paths, library list. This required cleaning up the way the bootloader
project works, it's now mostly independent from the parent.
2017-07-19 09:10:48 +10:00