From: Simon Schwarz simonschwarzcor@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 simonschwarzcor@gmail.com
--- V2 changes: nothing
V3 changes: nothing
V4 changes: ADD define description to commit message CHG renaming some defines - renaming SAVEBP SPL
V5 changes: nothing
V6 changes: nothing
V7 changes: nothing
V8 changes: FIX multiline comment style REBASE on u-boot
V9 changes: nothing
V10 changes: ADD unused __attribute__ to src and dst because they provoked a warning if SPL os boot was not active --- 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(); }