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| author | Simon Schwarz <simonschwarzcor@googlemail.com> | 2012-03-15 04:01:34 +0000 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2012-03-27 22:05:28 +0200 |
| commit | 1648a37505e84fc4e5268b026c3f1db862107e00 (patch) | |
| tree | cb3db353a2a2c354e66c2ebf2f8c99596a375f74 /doc | |
| parent | 19db9be4aa39e9112356c09c511f1c4726b64c74 (diff) | |
| download | u-boot-imx-1648a37505e84fc4e5268b026c3f1db862107e00.zip u-boot-imx-1648a37505e84fc4e5268b026c3f1db862107e00.tar.gz u-boot-imx-1648a37505e84fc4e5268b026c3f1db862107e00.tar.bz2 | |
Add cmd_spl command
This adds a spl command to the u-boot.
Related config:
CONFIG_CMD_SPL
activate/deactivate the command
CONFIG_CMD_SPL_NAND_OFS
Offset in NAND to use
Signed-off-by: Simon Schwarz <simonschwarzcor@gmail.com>
Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Tom Rini <tom.rini@gmail.com>
CC: Wolfgang Denk <wd@denx.de>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/README.commands.spl | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/doc/README.commands.spl b/doc/README.commands.spl new file mode 100644 index 0000000..ac33273 --- /dev/null +++ b/doc/README.commands.spl @@ -0,0 +1,31 @@ +The spl command is used to export a boot parameter image to RAM. Later +it may implement more functions connected to the SPL. + +SUBCOMMAND EXPORT +To execute the command everything has to be in place as if bootm should be +used. (kernel image, initrd-image, fdt-image etc.) + +export has two subcommands: + atags: exports the ATAGS + fdt: exports the FDT + +Call is: +spl export <ftd|atags> [kernel_addr] [initrd_addr] [fdt_addr if fdt] + + +TYPICAL CALL + +on OMAP3: +nandecc hw +nand read 0x82000000 0x280000 0x400000 /* Read kernel image from NAND*/ +spl export atags /* export ATAGS */ +nand erase 0x680000 0x20000 /* erase - one page */ +nand write 0x80000100 0x680000 0x20000 /* write the image - one page */ + +call with FDT: +nandecc hw +nand read 0x82000000 0x280000 0x400000 /* Read kernel image from NAND*/ +tftpboot 0x80000100 devkit8000.dtb /* Read fdt */ +spl export fdt 0x82000000 - 0x80000100 /* export FDT */ +nand erase 0x680000 0x20000 /* erase - one page */ +nand write <adress shown by spl export> 0x680000 0x20000 |