Signed-off-by: Prabhakar Kushwaha prabhakar@freescale.com ---
Add support of 2 stage boot loader in cornet platforms using SPL framework. B4860QDS: NAND boot T1040RDB: NAND, SD, SPI boot T1042RDB_PI: NAND, SD, SPI boot
In current secenrio size of u-boot can become >=512KB. So This patch set will be helpful for those SoC which has less internal SRAM(512KB).
here, PBL initialise the internal SRAM and copy SPL(160KB) in SRAM. SPL further initialise DDR using SPD and environment variables and copy u-boot(768 KB) from flash to DDR. Finally SPL transer control to u-boot for futher booting.
SPL has following features: - Executes within 256K - No relocation required
Run time view of SPL framework :- Run time view of SPL framework during NAND boot :- ----------------------------------------------- Area | Address | ----------------------------------------------- Reserve | 0xFFFC0000 (32KB) | ----------------------------------------------- GD, BD | 0xFFFC8000 (4KB) | ----------------------------------------------- ENV | 0xFFFC9000 (6KB) | ----------------------------------------------- HEAP | 0xFFFCA800 (34KB) | ----------------------------------------------- STACK | 0xFFFD8000 (20KB) | ----------------------------------------------- U-boot SPL | 0xFFFD8000 (160KB) | -----------------------------------------------
Run time view of SPL framework during SD, SPI boot :- ----------------------------------------------- Area | Address | ----------------------------------------------- Reserve | 0xFFFC0000 (32KB) | ----------------------------------------------- GD, BD | 0xFFFC8000 (4KB) | ----------------------------------------------- HEAP | 0xFFFC9000 (40KB) | ----------------------------------------------- STACK | 0xFFFD8000 (20KB) | ----------------------------------------------- U-boot SPL | 0xFFFD8000 (160KB) | -----------------------------------------------
NAND Flash memory Map on T104xRDB ------------------------------------------ Start End Definition Size 0x000000 0x0FFFFF u-boot 1MB 0x180000 0x19FFFF u-boot env 128KB 0x200000 0x21FFFF FMAN Ucode 128KB
SD Card memory Map on T104xRDB ------------------------------------------ Block #blocks Definition Size 0x008 2048 u-boot 1MB 0x800 0024 u-boot env 8KB 0x820 0256 FMAN Ucode 128KB
SPI Flash memory Map on T104xRDB ------------------------------------------ Start End Definition Size 0x000000 0x0FFFFF u-boot 1MB 0x100000 0x101FFF u-boot env 8KB 0x110000 0x12FFFF FMAN Ucode 128KB --- This patch set contains:-
[PATCH 1/10] powerpc/mpc85xx: Move LAW_EN define outside of config
[PATCH 2/10] powerpc/mpc85xx: Avoid hardcoding in SPL linker script
[PATCH 3/10] powerpc:Add support of SPL non-relocation
[PATCH 4/10] powerpc/mpc85xx:Disable non DDR LAWs before init_law
[PATCH 5/10] common/env: Point default environment for GD
[PATCH 6/10] driver/ifc: define nand_spl_load_image() for SPL
[PATCH 7/10] driver/mtd/spi:Read 8KB data chunk during u-boot load in SPL
[PATCH 8/10] Makefile: Add support of RAMBOOT_SPLPBL
[PATCH 9/10] board/b4qds:Add support of 2 stage NAND boot-loader
[PATCH 10/10] board/t104xrdb: Add support of NAND, SD, SPI boot for T1040RDB