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authorSRICHARAN R <r.sricharan@ti.com>2013-04-24 00:41:23 +0000
committerTom Rini <trini@ti.com>2013-05-10 08:25:56 -0400
commitfda06812a068f916f64d9d1b3d1730e8213195b3 (patch)
treeb6efdc49f508ec4ec805200b6fe621ed1ba8b8c7 /arch/arm/cpu
parentf92f2277a6cadfdc703a6700593cac3d8211bf53 (diff)
ARM: OMAP: Correct save_boot_params and replace with 'C' function
Currently save_boot_params saves the boot parameters passed from romcode. But this is not stored in a writable location consistently. So the current code would not work for a 'XIP' boot. Change this by saving the boot parameters in 'gd' which is always writable. Also add a 'C' function instead of an assembly code that is more readable. Signed-off-by: Sricharan R <r.sricharan@ti.com>
Diffstat (limited to 'arch/arm/cpu')
-rw-r--r--arch/arm/cpu/armv7/omap-common/hwinit-common.c50
1 files changed, 44 insertions, 6 deletions
diff --git a/arch/arm/cpu/armv7/omap-common/hwinit-common.c b/arch/arm/cpu/armv7/omap-common/hwinit-common.c
index 70d16a8160..c7107847c4 100644
--- a/arch/arm/cpu/armv7/omap-common/hwinit-common.c
+++ b/arch/arm/cpu/armv7/omap-common/hwinit-common.c
@@ -101,11 +101,6 @@ void omap_rev_string(void)
}
#ifdef CONFIG_SPL_BUILD
-static void init_boot_params(void)
-{
- boot_params_ptr = (u32 *) &boot_params;
-}
-
void spl_display_print(void)
{
omap_rev_string();
@@ -116,6 +111,42 @@ void __weak srcomp_enable(void)
{
}
+static void save_omap_boot_params(void)
+{
+ u32 rom_params = *((u32 *)OMAP_SRAM_SCRATCH_BOOT_PARAMS);
+ u8 boot_device;
+ u32 dev_desc, dev_data;
+
+ if ((rom_params < NON_SECURE_SRAM_START) ||
+ (rom_params > NON_SECURE_SRAM_END))
+ return;
+
+ /*
+ * rom_params can be type casted to omap_boot_parameters and
+ * used. But it not correct to assume that romcode structure
+ * encoding would be same as u-boot. So use the defined offsets.
+ */
+ gd->arch.omap_boot_params.omap_bootdevice = boot_device =
+ *((u8 *)(rom_params + BOOT_DEVICE_OFFSET));
+
+ gd->arch.omap_boot_params.ch_flags =
+ *((u8 *)(rom_params + CH_FLAGS_OFFSET));
+
+ if ((boot_device >= MMC_BOOT_DEVICES_START) &&
+ (boot_device <= MMC_BOOT_DEVICES_END)) {
+ if ((omap_hw_init_context() ==
+ OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL)) {
+ gd->arch.omap_boot_params.omap_bootmode =
+ *((u8 *)(rom_params + BOOT_MODE_OFFSET));
+ } else {
+ dev_desc = *((u32 *)(rom_params + DEV_DESC_PTR_OFFSET));
+ dev_data = *((u32 *)(dev_desc + DEV_DATA_PTR_OFFSET));
+ gd->arch.omap_boot_params.omap_bootmode =
+ *((u32 *)(dev_data + BOOT_MODE_OFFSET));
+ }
+ }
+}
+
/*
* Routine: s_init
* Description: Does early system init of watchdog, muxing, andclocks
@@ -132,6 +163,14 @@ void __weak srcomp_enable(void)
*/
void s_init(void)
{
+ /*
+ * Save the boot parameters passed from romcode.
+ * We cannot delay the saving further than this,
+ * to prevent overwrites.
+ */
+#ifdef CONFIG_SPL_BUILD
+ save_omap_boot_params();
+#endif
init_omap_revision();
hw_data_init();
@@ -156,7 +195,6 @@ void s_init(void)
/* For regular u-boot sdram_init() is called from dram_init() */
sdram_init();
- init_boot_params();
#endif
}