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| author | Shelley Chen <shchen@google.com> | 2020-09-25 09:30:44 -0700 |
|---|---|---|
| committer | Shelley Chen <shchen@google.com> | 2020-10-02 23:11:04 +0000 |
| commit | 6c2568f4f58b9a1b209c9af36d7f980fde784f08 (patch) | |
| tree | 99a24554ce5180ff36151940620f13da306d3d99 /src/drivers | |
| parent | ba9f82ed73400abca7ce08c5adcaaf943d200c38 (diff) | |
| download | coreboot-6c2568f4f58b9a1b209c9af36d7f980fde784f08.tar.xz | |
drivers/spi: Add BOOT_DEVICE_SPI_FLASH_NO_EARLY_WRITES config
Added new config BOOT_DEVICE_SPI_FLASH_NO_EARLY_WRITES to accomodate
older x86 platforms that don't allow writing to SPI flash when early
stages are running XIP from flash. If
BOOT_DEVICE_SPI_FLASH_NO_EARLY_WRITES is not selected,
BOOT_DEVICE_SPI_FLASH_RW_NOMMAP_EARLY will get auto-selected if
BOOT_DEVICE_SPI_FLASH_RW_NOMMAP=y. This allows for current platforms
that write to flash in the earlier stages, assuming that they have
that capability.
BUG=b:150502246
BRANCH=None
TEST=diff the coreboot.rom files resulting from running
./util/abuild/abuild -p none -t GOOGLE_NAMI -x -a --timeless
with and without this change to make sure that there was no
difference. Also did this for GOOGLE_CANDY board, which is
baytrail based (and has BOOT_DEVICE_SPI_FLASH_NO_EARLY_WRITES
enabled).
Change-Id: I3aef8be702f55873233610b8e20d0662aa951ca7
Signed-off-by: Shelley Chen <shchen@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45740
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/spi/Kconfig | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/drivers/spi/Kconfig b/src/drivers/spi/Kconfig index 42068f4fce..dbde3b2ad6 100644 --- a/src/drivers/spi/Kconfig +++ b/src/drivers/spi/Kconfig @@ -42,8 +42,20 @@ config BOOT_DEVICE_SPI_FLASH_RW_NOMMAP Provide common implementation of the RW boot device that doesn't provide mmap() operations. +config BOOT_DEVICE_SPI_FLASH_NO_EARLY_WRITES + bool + default n + depends on BOOT_DEVICE_SPI_FLASH_RW_NOMMAP + help + For platforms who do not allow writes to SPI flash in early + stages like romstage. Not selecting this config will result + in the auto-selection of + BOOT_DEVICE_SPI_FLASH_RW_NOMMAP_EARLY if + BOOT_DEVICE_SPI_FLASH_RW_NOMMAP is selected by the platform. + config BOOT_DEVICE_SPI_FLASH_RW_NOMMAP_EARLY bool + default y if BOOT_DEVICE_SPI_FLASH_RW_NOMMAP && !BOOT_DEVICE_SPI_FLASH_NO_EARLY_WRITES default n depends on BOOT_DEVICE_SPI_FLASH_RW_NOMMAP help |