This adds Linux booting to the SPL
Related CONFIGs: CONFIG_SPL_OS_BOOT Activates/Deactivates the OS booting feature CONFIG_SPL_OS_BOOT_KEY defines the IO-pin number u-boot switch - if pressed u-boot is booted CONFIG_SYS_SPL_MACHID Machine ID of the used board 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 normaly RAM-begin + 0x100
Signed-off-by: Simon Schwarz simonschwarzcor@gmail.com --- arch/arm/cpu/armv7/omap-common/spl.c | 48 ++++++++++++++++++++++++++++++++- include/configs/devkit8000.h | 7 +++- 2 files changed, 51 insertions(+), 4 deletions(-)
diff --git a/arch/arm/cpu/armv7/omap-common/spl.c b/arch/arm/cpu/armv7/omap-common/spl.c index c76fea6..9c22c7a 100644 --- a/arch/arm/cpu/armv7/omap-common/spl.c +++ b/arch/arm/cpu/armv7/omap-common/spl.c @@ -35,6 +35,7 @@ #include <asm/arch/mmc_host_def.h> #include <i2c.h> #include <image.h> +#include <asm/omap_gpio.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -63,6 +64,25 @@ void board_init_f(ulong dummy) relocate_code(CONFIG_SPL_STACK, &gdata, CONFIG_SPL_TEXT_BASE); }
+#ifdef CONFIG_SPL_OS_BOOT +/* Return the value of the U-boot key + * + * RETURN + * 0 if not pressed + * positiv if pressed + */ +int spl_uboot_key(void) +{ + int val = 0; + if (!omap_request_gpio(CONFIG_SPL_OS_BOOT_KEY)) { + omap_set_gpio_direction(CONFIG_SPL_OS_BOOT_KEY, 1); + val = omap_get_gpio_datain(CONFIG_SPL_OS_BOOT_KEY); + omap_free_gpio(CONFIG_SPL_OS_BOOT_KEY); + } + return !val; +} +#endif /* CONFIG_SPL_OS_BOOT */ + void spl_parse_image_header(const struct image_header *header) { u32 header_size = sizeof(struct image_header); @@ -90,7 +110,25 @@ void spl_parse_image_header(const struct image_header *header) } }
-static void jump_to_image_no_args(void) +#ifdef CONFIG_SPL_OS_BOOT +/* This function jumps to an image with argument. Normally an FDT or ATAGS + * image. + * arg: Pointer to paramter image in RAM + */ +void jump_to_image_linux(void *arg) +{ + debug("Entering kernel arg pointer: 0x%X\n", arg); + typedef void (*image_entry_arg_t)(int, int, void *) + __attribute__ ((noreturn)); + image_entry_arg_t image_entry = + (image_entry_arg_t) spl_image.entry_point; + /* cleanup_before_linux(); */ /*write SPL function for that*/ + image_entry(0, CONFIG_SYS_SPL_MACHID, arg); +} +void jump_to_image_linux(void *) __attribute__ ((noreturn)); +#endif + +void jump_to_image_no_args(void) { typedef void (*image_entry_noargs_t)(void)__attribute__ ((noreturn)); image_entry_noargs_t image_entry = @@ -99,8 +137,8 @@ static void jump_to_image_no_args(void) debug("image entry point: 0x%X\n", spl_image.entry_point); image_entry(); } - void jump_to_image_no_args(void) __attribute__ ((noreturn)); + void board_init_r(gd_t *id, ulong dummy) { u32 boot_device; @@ -134,6 +172,12 @@ void board_init_r(gd_t *id, ulong dummy) debug("Jumping to U-Boot\n"); jump_to_image_no_args(); break; +#ifdef CONFIG_SPL_OS_BOOT + case IH_OS_LINUX: + debug("Jumping to Linux\n"); + jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR); + break; +#endif default: puts("Unsupported OS image.. Jumping nevertheless..\n"); jump_to_image_no_args(); diff --git a/include/configs/devkit8000.h b/include/configs/devkit8000.h index 4d0573c..3897ab4 100644 --- a/include/configs/devkit8000.h +++ b/include/configs/devkit8000.h @@ -38,7 +38,7 @@ #define CONFIG_OMAP3430 1 /* which is in a 3430 */ #define CONFIG_OMAP3_DEVKIT8000 1 /* working with DevKit8000 */
-#define CONFIG_SYS_TEXT_BASE 0x80008000 +#define CONFIG_SYS_TEXT_BASE 0x80100000
#define CONFIG_SDRC /* The chip has SDRC controller */
@@ -328,7 +328,7 @@ #define CONFIG_SPL_MAX_SIZE 0xB400 /* 45 K */ #define CONFIG_SPL_STACK LOW_LEVEL_SRAM_STACK
-#define CONFIG_SPL_BSS_START_ADDR 0x80000000 /*CONFIG_SYS_SDRAM_BASE*/ +#define CONFIG_SPL_BSS_START_ADDR 0x80000500 /* leave space for bootargs*/ #define CONFIG_SPL_BSS_MAX_SIZE 0x80000
/* NAND boot config */ @@ -358,6 +358,9 @@ #define CONFIG_CMD_SAVEBP_WRITE_SIZE 0x400 /* 1024 byte */ #define CONFIG_CMD_SAVEBP_NAND_OFS (CONFIG_SYS_NAND_SPL_KERNEL_OFFS+\ 0x400000) +#define CONFIG_SPL_OS_BOOT +#define CONFIG_SPL_OS_BOOT_KEY 26 +#define CONFIG_SYS_SPL_MACHID MACH_TYPE_DEVKIT8000 #define CONFIG_SYS_NAND_SPL_KERNEL_OFFS 0x280000 #define CONFIG_SYS_SPL_ARGS_ADDR (PHYS_SDRAM_1 + 0x100) #endif /* __CONFIG_H */