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| author | Sricharan <r.sricharan@ti.com> | 2011-11-15 09:50:03 -0500 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2011-11-15 22:25:50 +0100 |
| commit | 78f455c055ddf55a1a2dd6ae5e2d060ed2e5bd0e (patch) | |
| tree | c124c8e56d72e9e46f70516fa9dd3dabdac22d9a /arch/arm/cpu/armv7/omap-common/lowlevel_init.S | |
| parent | bb772a594493092adfb18a56889e0bce855eed99 (diff) | |
| download | u-boot-imx-78f455c055ddf55a1a2dd6ae5e2d060ed2e5bd0e.zip u-boot-imx-78f455c055ddf55a1a2dd6ae5e2d060ed2e5bd0e.tar.gz u-boot-imx-78f455c055ddf55a1a2dd6ae5e2d060ed2e5bd0e.tar.bz2 | |
omap4/5: Add support for booting with CH.
Configuration header(CH) is 512 byte header attached to an OMAP
boot image that will help ROM code to initialize clocks, SDRAM
etc and copy U-Boot directly into SDRAM. CH can help us in
by-passing SPL and directly boot U-boot, hence it's an alternative
for SPL. However, we intend to support both CH and SPL for OMAP4/5.
Initialization done through CH is limited and is not equivalent
to that done by SPL. So U-Boot has to distinguish between the
two cases and handle them accordingly. This patch takes care
of doing this.
Signed-off-by: sricharan <r.sricharan@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Diffstat (limited to 'arch/arm/cpu/armv7/omap-common/lowlevel_init.S')
| -rw-r--r-- | arch/arm/cpu/armv7/omap-common/lowlevel_init.S | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/arch/arm/cpu/armv7/omap-common/lowlevel_init.S b/arch/arm/cpu/armv7/omap-common/lowlevel_init.S index 6873298..35f38ac 100644 --- a/arch/arm/cpu/armv7/omap-common/lowlevel_init.S +++ b/arch/arm/cpu/armv7/omap-common/lowlevel_init.S @@ -27,7 +27,7 @@ */ #include <asm/arch/omap.h> -#ifdef CONFIG_SPL_BUILD + .global save_boot_params save_boot_params: /* @@ -43,21 +43,40 @@ save_boot_params: cmp r2, r0 blt 1f + /* + * store the boot params passed from rom code or saved + * and passed by SPL + */ + cmp r0, #0 + beq 1f + ldr r1, =boot_params + str r0, [r1] +#ifdef CONFIG_SPL_BUILD /* Store the boot device in omap_boot_device */ - ldr r2, [r0, #BOOT_DEVICE_OFFSET] @ r1 <- value of boot device + ldrb r2, [r0, #BOOT_DEVICE_OFFSET] @ r1 <- value of boot device and r2, #BOOT_DEVICE_MASK - ldr r3, =omap_bootdevice - str r2, [r3] @ omap_boot_device <- r1 + ldr r3, =boot_params + strb r2, [r3, #BOOT_DEVICE_OFFSET] @ omap_boot_device <- r1 + /* boot mode is passed only for devices that can raw/fat mode */ + cmp r2, #2 + blt 2f + cmp r2, #7 + bgt 2f /* Store the boot mode (raw/FAT) in omap_boot_mode */ ldr r2, [r0, #DEV_DESC_PTR_OFFSET] @ get the device descriptor ptr ldr r2, [r2, #DEV_DATA_PTR_OFFSET] @ get the pDeviceData ptr ldr r2, [r2, #BOOT_MODE_OFFSET] @ get the boot mode ldr r3, =omap_bootmode str r2, [r3] +#endif +2: + ldrb r2, [r0, #CH_FLAGS_OFFSET] + ldr r3, =boot_params + strb r2, [r3, #CH_FLAGS_OFFSET] 1: bx lr -#endif + .globl lowlevel_init lowlevel_init: |