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spl_mmc: add Falcon mode support for FAT variant 

If Falcon mode support is enabled (and the system isn't directed into
booting u-boot), it will instead try to load kernel from
CONFIG_SPL_FAT_LOAD_KERNEL_NAME file and kernel argument parameters from
CONFIG_SPL_FAT_LOAD_ARGS_NAME, both from the same partition as u-boot.

Signed-off-by: Peter Korsgaard <peter.korsgaard@barco.com>
utp
Peter Korsgaard 2013-05-13 08:36:27 +00:00 committed by Tom Rini
parent b6144dfce9
commit 7ad2cc7964
2 changed files with 29 additions and 0 deletions
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8
README
View File

@ -2938,6 +2938,14 @@ FIT uImage format:
CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME
Filename to read to load U-Boot when reading from FAT
CONFIG_SPL_FAT_LOAD_KERNEL_NAME
Filename to read to load kernel uImage when reading
from FAT (for Falcon mode)
CONFIG_SPL_FAT_LOAD_ARGS_NAME
Filename to read to load kernel argument parameters
when reading from FAT (for Falcon mode)
CONFIG_SPL_MPC83XX_WAIT_FOR_NAND
Set this for NAND SPL on PPC mpc83xx targets, so that
start.S waits for the rest of the SPL to load before

21
common/spl/spl_mmc.c
View File

@ -91,6 +91,24 @@ end:
return (err <= 0);
}
#ifdef CONFIG_SPL_OS_BOOT
static int mmc_load_image_fat_os(struct mmc *mmc)
{
int err;
err = file_fat_read(CONFIG_SPL_FAT_LOAD_ARGS_NAME,
(void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
if (err <= 0) {
printf("spl: error reading image %s, err - %d\n",
CONFIG_SPL_FAT_LOAD_ARGS_NAME, err);
return -1;
}
return mmc_load_image_fat(mmc, CONFIG_SPL_FAT_LOAD_KERNEL_NAME);
}
#endif
#endif
void spl_mmc_load_image(void)
@ -128,6 +146,9 @@ void spl_mmc_load_image(void)
hang();
}
#ifdef CONFIG_SPL_OS_BOOT
if (spl_start_uboot() || mmc_load_image_fat_os(mmc))
#endif
err = mmc_load_image_fat(mmc, CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME);
#endif
} else {