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| author | Marek Vasut <marex@denx.de> | 2016-04-22 21:56:21 +0200 |
|---|---|---|
| committer | Andreas Bießmann <andreas@biessmann.org> | 2016-05-24 08:08:37 +0200 |
| commit | bb0c63a5f3b05770e8cb6171be57ca69995bd447 (patch) | |
| tree | b5cfe93f0e4932dfb757a9df66deecc8804227d8 /arch/arm/mach-at91/include/mach/sama5d2.h | |
| parent | 12328f25f257c347c79562ebc7f66c1a0f48bc2b (diff) | |
| download | talos-obmc-uboot-bb0c63a5f3b05770e8cb6171be57ca69995bd447.tar.gz talos-obmc-uboot-bb0c63a5f3b05770e8cb6171be57ca69995bd447.zip | |
ARM: sama5d2: Implement boot device autodetection
Implement support for saving ARM register R4 early during boot using
save_boot_params . Implement support for decoding the stored register
R4 value in spl_boot_device() to obtain boot device from which the
SoC booted. This way, the SPL will always load U-Boot from the same
device from which the SPL itself booted instead of using hard-coded
boot device.
This functionality is useful for example when booting sama5d2-xplained
from SD card, where by default the SPL would try loading the U-Boot
from eMMC and fail. This is because eMMC is on SDHCI0 (BOOT_DEVICE_MMC1),
while SD slot is on SDHCI1 (BOOT_DEVICE_MMC2) and the SPL was hard-wired
to always boot from BOOT_DEVICE_MMC1.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Andreas Bießmann <andreas.devel@googlemail.com>
Cc: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Andreas Bießmann <andreas@biessmann.org>
Diffstat (limited to 'arch/arm/mach-at91/include/mach/sama5d2.h')
| -rw-r--r-- | arch/arm/mach-at91/include/mach/sama5d2.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/include/mach/sama5d2.h b/arch/arm/mach-at91/include/mach/sama5d2.h index 25c85411e5..ee841da971 100644 --- a/arch/arm/mach-at91/include/mach/sama5d2.h +++ b/arch/arm/mach-at91/include/mach/sama5d2.h @@ -230,6 +230,18 @@ /* No PMECC Galois table in ROM */ #define NO_GALOIS_TABLE_IN_ROM +/* Boot modes stored by BootROM in r4 */ +#define ATMEL_SAMA5D2_BOOT_FROM_OFF 0 +#define ATMEL_SAMA5D2_BOOT_FROM_MASK 0xf +#define ATMEL_SAMA5D2_BOOT_FROM_SPI (0 << 0) +#define ATMEL_SAMA5D2_BOOT_FROM_MCI (1 << 0) +#define ATMEL_SAMA5D2_BOOT_FROM_SMC (2 << 0) +#define ATMEL_SAMA5D2_BOOT_FROM_TWI (3 << 0) +#define ATMEL_SAMA5D2_BOOT_FROM_QSPI (4 << 0) + +#define ATMEL_SAMA5D2_BOOT_DEV_ID_OFF 4 +#define ATMEL_SAMA5D2_BOOT_DEV_ID_MASK 0xf + #ifndef __ASSEMBLY__ unsigned int get_chip_id(void); unsigned int get_extension_chip_id(void); |
