On 08/16/2013 12:16 AM, ying.zhang@freescale.com wrote:
From: Ying Zhang b40530@freescale.com
Due to the nand SPL on some board(e.g. P1022DS)has a size limit, it can not be more than 4K. So, the SPL cannot initialize the DDR with the SPD code. This patch introduces TPL to enable a loader stub that is loaded by the code from the SPL. It initializes the DDR with the SPD or other operations.
The TPL's size is sizeable, the maximum size is decided by the memory's size that TPL runs. It initializes the DDR through SPD code, and copys final uboot image to DDR. So there are three stage uboot images:
- spl_boot, * tpl_boot, * final uboot image
This patch is on top of the patch: SPL: Makefile: Build a separate autoconf.mk for SPL
These two lines are removed when applying.
Signed-off-by: Ying Zhang b40530@freescale.com
Change from v10:
- No change.
Change from v9:
- Move the part revision to the other patch. for example:fsl_elbc_spl.c.
- Modify the Makefile.
- Modify doc/README.TPL, fix checkpatch warnings.
Change from v8:
- Modify the doc/README.TPL.
- Modify the Makefile.
- Modify the drivers/mtd/nand/fsl_elbc_spl.c.
- Modify the spl/Makefile.
Change from v7:
- Modify the doc/README.TPL
- Modify the spl/Makefile.
Change from v6:
- Modify the description of the patch.
- Add the separate the autoconf.mk for TPL.
- Delete the file tpl/Makefile and the directory tpl.
- Reuse the spl/Makefie in TPL.
Change from v5:
- Use ifdef to define "nand_load_image" to non-static for non-SPL.
Change from v4:
- No change.
Change from v3:
- No change.
Change from v2:
- No change.
Change from v1:
- Split from "powerpc/p1022ds: nand: introduce the TPL based on the SPL".
Makefile | 50 ++++++++++++++++++++++++++++++++++++++++++-------- README | 16 ++++++++++++++++ config.mk | 30 ++++++++++++++++++++++++++++-- doc/README.TPL | 45 +++++++++++++++++++++++++++++++++++++++++++++ spl/Makefile | 20 ++++++++++++++++---- 5 files changed, 147 insertions(+), 14 deletions(-) create mode 100644 doc/README.TPL
Applied to u-boot-mpc85xx.git after removing "NAND" from the subject.
York