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