On 08/16/2013 12:16 AM, ying.zhang@freescale.com wrote:
From: Ying Zhang b40530@freescale.com
The code from the internal on-chip ROM. It loads the final uboot image into DDR, then jump to it to begin execution.
The SPL's size is sizeable, the maximum size must not exceed the size of L2 SRAM. It initializes the DDR through SPD code, and copys final uboot image to DDR. So there are two stage uboot images:
- spl_boot, 96KB size. The env variables are copied to L2 SRAM, so that
ddr spd code can get the interleaving mode setting in env. It loads final uboot image from offset 96KB.
- final uboot image, size is variable depends on the functions enabled.
Signed-off-by: Ying Zhang b40530@freescale.com
Change from v10:
- No change.
Change from v9:
- Mofidy drivers/mmc/fsl_esdhc_spl.c, fix checkpatch warnings.
Change from v8:
- No change.
Change from v7:
- No change.
Change from v6:
- Split to the patch "Support booting from SD Card with SPL" and the patch.
- "Enable P1022DS to boot from SD Card with SPL". this patch only support.
- booting from SD Card with SPL.
Change from v5:
- Add new symbol CONFIG_SPL_ENV_IMPORT for contain the functionality.
- env_import.
Change from v4:
- No change.
Change from v3:
- No change.
Change from v2:
- No change.
Change from v1:
- Split from "boot from SD card/SPI flash with SPL".
README | 4 + arch/powerpc/cpu/mpc85xx/u-boot-spl.lds | 5 + .../cpu/mpc8xxx/ddr/lc_common_dimm_params.c | 4 + doc/README.mpc85xx-sd-spi-boot | 81 ++++++++++++ drivers/mmc/Makefile | 3 + drivers/mmc/fsl_esdhc_spl.c | 130 ++++++++++++++++++++ drivers/mmc/mmc.c | 2 + include/fsl_esdhc.h | 1 + spl/Makefile | 3 + 9 files changed, 233 insertions(+), 0 deletions(-) create mode 100644 doc/README.mpc85xx-sd-spi-boot create mode 100644 drivers/mmc/fsl_esdhc_spl.c
Applied to u-boot-mpc85xx.git.
York