omap3: implement boot parameter saving

Implements the saving of boot params passed by OMAP3 ROM code.

Signed-off-by: Simon Schwarz <simonschwarzcor@gmail.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

arch/arm/cpu/armv7/omap-common/spl.c

@@ -194,8 +194,12 @@ static void mmc_load_image(void)
 		printf("spl: mmc init failed: err - %d\n", err);
 		hang();
 	}
-
+/* For OMAP3 there is no automatic boot mode detection */
+#ifdef CONFIG_OMAP34XX
+	boot_mode = CONFIG_SYS_MMC_SD_BOOTMODE;
+#else
 	boot_mode = omap_boot_mode();
+#endif
 	if (boot_mode == MMCSD_MODE_RAW) {
 		debug("boot mode - RAW\n");
 		mmc_load_image_raw(mmc);

arch/arm/cpu/armv7/omap3/lowlevel_init.S

@@ -37,8 +37,13 @@ _TEXT_BASE:
 
 .global save_boot_params
 save_boot_params:
-	#warning "Please implement save_boot_params for OMAP3"
-	bx lr
+#ifdef CONFIG_SPL_BUILD
+	ldr	r4, =omap3_boot_device
+	ldr	r5, [r0, #0x4]
+	and	r5, r5, #0xff
+	str	r5, [r4]
+#endif
+	bx	lr
 
 .global omap3_gp_romcode_call
 omap3_gp_romcode_call: