Dear Simon,
Am 25.08.2011 10:33, schrieb Simon Schwarz:
Adds a Readme for the savebp command
This patch should be merged with 'Add savebp command'
Signed-off-by: Simon Schwarz simonschwarzcor@gmail.com
V2 changes: ADDED in V2
V3 changes: nothing
doc/README.commands.savebp | 28 ++++++++++++++++++++++++++++ 1 files changed, 28 insertions(+), 0 deletions(-) create mode 100644 doc/README.commands.savebp
diff --git a/doc/README.commands.savebp b/doc/README.commands.savebp new file mode 100644 index 0000000..dc05ee0 --- /dev/null +++ b/doc/README.commands.savebp @@ -0,0 +1,28 @@ +The savebp (=save boot parameters) is used to save a boot parameter image to +non-volatile memory.
+To execute the command everything has to be in place as if bootm should be +used. +(kernel image, initrd-image, fdt-image etc.)
+Call is: +savebp [ftd|atags] [nand_offset] [kernel_addr] [initrd_addr] [fdt_addr]
+Only the first parameter [ftd|atags] is mandatory if the others are left blank +standard values are used.
+e.g: +savebp fdt 0x680000 0x82000000 0x80000100 - +savebo atags
+typical call on OMAP3: +nandecc hw +nand read 0x82000000 0x280000 0x400000 /* Read kernel image from NAND */
why read the kernel image here?
+tftpboot 0x80000100 devkit8000.dtb /* Read fdt */ +savebp fdt 0x680000 0x82000000 0x80000100 - /* Save the image */
+------------Behind the scene--------------- +Atm the implementation is that we have /common/cmd_savebp.c which implements +the command tself and the subcommand calls to bootm.
^itself
+Then the arch specific implementation of do_save_atags or do_savebp_fdt +in /arch/arm/lib is called.
(therefore a errormessage should/could be added to common/cmd_savebp.c, if ARCH != ARM)
regrads
Andreas Bießmann