Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / doc / README.commands.spl

diff --git a/qemu/roms/u-boot/doc/README.commands.spl b/qemu/roms/u-boot/doc/README.commands.spl
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+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