diff options
| author | Paul Kocialkowski <contact@paulk.fr> | 2015-07-15 16:02:23 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2015-07-27 15:02:06 -0400 |
| commit | ed19bdaea3d70331de3cd93d0b21970fead97d39 (patch) | |
| tree | 35c4a7ac106a63ff240ebcadb898733402eeb472 /arch/arm/include/asm/omap_common.h | |
| parent | 2cb81b6bcd446952e83ef65279d01c3933ba0baa (diff) | |
omap-common: SYS_BOOT-based fallback boot device selection for peripheral boot
OMAP devices might boot from peripheral devices, such as UART or USB.
When that happens, the U-Boot SPL tries to boot the next stage (complete U-Boot)
from that peripheral device, but in most cases, this is not a valid boot device.
This introduces a fallback option that reads the SYS_BOOT pins, that are used by
the bootrom to determine which device to boot from. It is intended for the
SYS_BOOT value to be interpreted in the memory-preferred scheme, so that the
U-Boot SPL can load the next stage from a valid location.
Practically, this options allows loading the U-Boot SPL through USB and have it
load the next stage according to the memory device selected by SYS_BOOT instead
of stalling.
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Diffstat (limited to 'arch/arm/include/asm/omap_common.h')
| -rw-r--r-- | arch/arm/include/asm/omap_common.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/include/asm/omap_common.h b/arch/arm/include/asm/omap_common.h index 084ea68acc..056affc3fa 100644 --- a/arch/arm/include/asm/omap_common.h +++ b/arch/arm/include/asm/omap_common.h @@ -697,4 +697,8 @@ static inline u8 is_dra72x(void) #define CH_FLAGS_CHFLASH (1 << 2) #define CH_FLAGS_CHMMCSD (1 << 3) +#ifndef __ASSEMBLY__ +u32 omap_sys_boot_device(void); +#endif + #endif /* _OMAP_COMMON_H_ */ |