From: Simon Schwarz <simonschwarz...@googlemail.com>
This implements booting of Linux from NAND in SPL
Related config parameters:
CONFIG_SYS_NAND_SPL_KERNEL_OFFS
Offset in NAND of direct boot kernel image to use in SPL
CONFIG_SYS_SPL_ARGS_ADDR
Address where the kernel boot arguments are expected - this is
normally RAM-start + 0x100 (on ARM)
Signed-off-by: Simon Schwarz <simonschwarz...@gmail.com>
CC: Tom Rini <tom.r...@gmail.com>
CC: Stefano Babic <sba...@denx.de>
CC: Wolfgang Denk <w...@denx.de>
---
arch/arm/cpu/armv7/omap-common/spl_nand.c | 66 ++++++++++++++++++++++-------
1 files changed, 50 insertions(+), 16 deletions(-)
diff --git a/arch/arm/cpu/armv7/omap-common/spl_nand.c
b/arch/arm/cpu/armv7/omap-common/spl_nand.c
index 38d06b1..2a66214 100644
--- a/arch/arm/cpu/armv7/omap-common/spl_nand.c
+++ b/arch/arm/cpu/armv7/omap-common/spl_nand.c
@@ -24,6 +24,7 @@
#include <asm/u-boot.h>
#include <asm/utils.h>
#include <asm/arch/sys_proto.h>
+#include <asm/io.h>
#include <nand.h>
#include <version.h>
#include <asm/omap_common.h>
@@ -32,6 +33,9 @@
void spl_nand_load_image(void)
{
struct image_header *header;
+ int *src __attribute__((unused));
+ int *dst __attribute__((unused));
+
switch (omap_boot_mode()) {
case NAND_MODE_HW_ECC:
debug("spl: nand - using hw ecc\n");
@@ -45,26 +49,56 @@ void spl_nand_load_image(void)
/*use CONFIG_SYS_TEXT_BASE as temporary storage area */
header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
+#ifdef CONFIG_SPL_OS_BOOT
+ if (!spl_uboot_key()) {
+ /*
+ * load parameter image
+ * load to temp position since nand_spl_load_image reads
+ * a whole block which is typically larger than
+ * CONFIG_CMD_SAVEBP_WRITE_SIZE therefore may overwrite
+ * following sections like BSS
+ */
+ nand_spl_load_image(CONFIG_CMD_SPL_NAND_OFS,
+ CONFIG_CMD_SPL_WRITE_SIZE,
+ (void *)CONFIG_SYS_TEXT_BASE);
+ /* copy to destintion */
+ for (dst = (int *)CONFIG_SYS_SPL_ARGS_ADDR,
+ src = (int *)CONFIG_SYS_TEXT_BASE;
+ src < (int *)(CONFIG_SYS_TEXT_BASE +
+ CONFIG_CMD_SPL_WRITE_SIZE);
+ src++, dst++) {
+ writel(readl(src), dst);
+ }
+ /* load linux */
+ nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
+ CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
+ spl_parse_image_header(header);
+ nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
+ spl_image.size, (void *)spl_image.load_addr);
+ } else
+#endif
+ {
#ifdef CONFIG_NAND_ENV_DST
- nand_spl_load_image(CONFIG_ENV_OFFSET,
- CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
- spl_parse_image_header(header);
- nand_spl_load_image(CONFIG_ENV_OFFSET, spl_image.size,
- (void *)image_load_addr);
+ nand_spl_load_image(CONFIG_ENV_OFFSET,
+ CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
+ spl_parse_image_header(header);
+ nand_spl_load_image(CONFIG_ENV_OFFSET, spl_image.size,
+ (void *)spl_image.load_addr);
#ifdef CONFIG_ENV_OFFSET_REDUND
- nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND,
- CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
- spl_parse_image_header(header);
- nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND, spl_image.size,
- (void *)image_load_addr);
+ nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND,
+ CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
+ spl_parse_image_header(header);
+ nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND, spl_image.size,
+ (void *)spl_image.load_addr);
#endif
#endif
- /* Load u-boot */
- nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
- CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
- spl_parse_image_header(header);
- nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
- spl_image.size, (void *)spl_image.load_addr);
+ /* Load u-boot */
+ nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
+ CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
+ spl_parse_image_header(header);
+ nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
+ spl_image.size, (void *)spl_image.load_addr);
+ }
nand_deselect();
}
--
1.7.5.4
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
