Hi Simon,
On Tuesday 19 July 2011 02:46 PM, Simon Schwarz wrote:
> Hi Aneesh,
>
> I'am not really sure about the save_boot_params() feature you added.
>
> May you point me where I can find this in the OMAP reference docs?
What I have done for OMAP4 will not work for OMAP3. For OMAP3 you will
get only the boot-device(eMMC, MMC/SD, nand etc) and *not* the bootmode(raw
vs FAT).
To get boot device you can don one of the following approaches.
1. What x-loader does
git://git.omapzoom.org/repo/x-loader.git - master branch
cpu/omap3/start.S:
reset:
ldr r4, scratchpad /* r4 <- scratchpad reg address */
ldr r5, [r0, #0x4] /* r5 <- value of boot device */
str r5, [r4] /* store r5 in scratchpad reg */
See the usage in lib/board.c:
Here are the device numbers:
case 0x03:
strcpy(boot_dev_name, "ONENAND");
case 0x02:
strcpy(boot_dev_name, "NAND");
case 0x05:
strcpy(boot_dev_name, "EMMC");
case 0x06:
strcpy(boot_dev_name, "MMC/SD1");
This is internal ROM code information and not documented anywhere.
You may assume FAT mode for MMC/SD1 and raw mode for the rest.
2. Read the boot device from a hw register(SYS_BOOT)
See 'chapter 26 Initialization' and look at table 26-3
best regards,
Aneesh
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
