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powerpc: mpc85xx: Support booting from SD Card with SPL

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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>
Acked-by: York Sun <yorksun@freescale.com>
This commit is contained in:
Ying Zhang
2013-08-16 15:16:11 +08:00
committed by York Sun
parent 0151d99d74
commit bb0dc1084f
9 changed files with 233 additions and 0 deletions
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@@ -3090,6 +3090,10 @@ FIT uImage format:
Support for NAND boot using simple NAND drivers that
expose the cmd_ctrl() interface.
CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT
Set for the SPL on PPC mpc8xxx targets, support for
arch/powerpc/cpu/mpc8xxx/ddr/libddr.o in SPL binary.
CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT,
CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE,
CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS,