diff options
Diffstat (limited to 'common/spl/spl.c')
| -rw-r--r-- | common/spl/spl.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/common/spl/spl.c b/common/spl/spl.c new file mode 100644 index 0000000..1562f2a --- /dev/null +++ b/common/spl/spl.c @@ -0,0 +1,224 @@ +/* + * (C) Copyright 2010 + * Texas Instruments, <www.ti.com> + * + * Aneesh V <aneesh@ti.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ +#include <common.h> +#include <spl.h> +#include <asm/u-boot.h> +#include <nand.h> +#include <fat.h> +#include <version.h> +#include <i2c.h> +#include <image.h> +#include <malloc.h> +#include <linux/compiler.h> + +DECLARE_GLOBAL_DATA_PTR; + +u32 *boot_params_ptr = NULL; +struct spl_image_info spl_image; + +/* Define global data structure pointer to it*/ +static gd_t gdata __attribute__ ((section(".data"))); +static bd_t bdata __attribute__ ((section(".data"))); + +inline void hang(void) +{ + puts("### ERROR ### Please RESET the board ###\n"); + for (;;) + ; +} + +void board_init_f(ulong dummy) +{ + /* + * We call relocate_code() with relocation target same as the + * CONFIG_SYS_SPL_TEXT_BASE. This will result in relocation getting + * skipped. Instead, only .bss initialization will happen. That's + * all we need + */ + debug(">>board_init_f()\n"); + relocate_code(CONFIG_SPL_STACK, &gdata, CONFIG_SPL_TEXT_BASE); +} + +/* + * Default function to determine if u-boot or the OS should + * be started. This implementation always returns 1. + * + * Please implement your own board specific funcion to do this. + * + * RETURN + * 0 to not start u-boot + * positive if u-boot should start + */ +#ifdef CONFIG_SPL_OS_BOOT +__weak int spl_start_uboot(void) +{ + puts("SPL: Please implement spl_start_uboot() for your board\n"); + puts("SPL: Direct Linux boot not active!\n"); + return 1; +} +#endif + +void spl_parse_image_header(const struct image_header *header) +{ + u32 header_size = sizeof(struct image_header); + + if (__be32_to_cpu(header->ih_magic) == IH_MAGIC) { + spl_image.size = __be32_to_cpu(header->ih_size) + header_size; + spl_image.entry_point = __be32_to_cpu(header->ih_load); + /* Load including the header */ + spl_image.load_addr = spl_image.entry_point - header_size; + spl_image.os = header->ih_os; + spl_image.name = (const char *)&header->ih_name; + debug("spl: payload image: %s load addr: 0x%x size: %d\n", + spl_image.name, spl_image.load_addr, spl_image.size); + } else { + /* Signature not found - assume u-boot.bin */ + puts("mkimage signature not found, assuming u-boot.bin ..\n"); + debug("mkimage signature not found - ih_magic = %x\n", + header->ih_magic); + /* Let's assume U-Boot will not be more than 200 KB */ + spl_image.size = 200 * 1024; + spl_image.entry_point = CONFIG_SYS_TEXT_BASE; + spl_image.load_addr = CONFIG_SYS_TEXT_BASE; + spl_image.os = IH_OS_U_BOOT; + spl_image.name = "U-Boot"; + } +} + +/* + * This function jumps to an image with argument. Normally an FDT or ATAGS + * image. + * arg: Pointer to paramter image in RAM + */ +#ifdef CONFIG_SPL_OS_BOOT +static void __noreturn jump_to_image_linux(void *arg) +{ + debug("Entering kernel arg pointer: 0x%p\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(); + image_entry(0, CONFIG_MACH_TYPE, arg); +} +#endif + +static void __noreturn jump_to_image_no_args(void) +{ + typedef void __noreturn (*image_entry_noargs_t)(u32 *); + image_entry_noargs_t image_entry = + (image_entry_noargs_t) spl_image.entry_point; + + debug("image entry point: 0x%X\n", spl_image.entry_point); + /* Pass the saved boot_params from rom code */ +#if defined(CONFIG_VIRTIO) || defined(CONFIG_ZEBU) + image_entry = (image_entry_noargs_t)0x80100000; +#endif + u32 boot_params_ptr_addr = (u32)&boot_params_ptr; + image_entry((u32 *)boot_params_ptr_addr); +} + +void board_init_r(gd_t *id, ulong dummy) +{ + u32 boot_device; + debug(">>spl:board_init_r()\n"); + +#ifdef CONFIG_SYS_SPL_MALLOC_START + mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START, + CONFIG_SYS_SPL_MALLOC_SIZE); +#endif + +#ifdef CONFIG_SPL_BOARD_INIT + spl_board_init(); +#endif + + boot_device = spl_boot_device(); + debug("boot device - %d\n", boot_device); + switch (boot_device) { +#ifdef CONFIG_SPL_MMC_SUPPORT + case BOOT_DEVICE_MMC1: + case BOOT_DEVICE_MMC2: + case BOOT_DEVICE_MMC2_2: + spl_mmc_load_image(); + break; +#endif +#ifdef CONFIG_SPL_NAND_SUPPORT + case BOOT_DEVICE_NAND: + spl_nand_load_image(); + break; +#endif +#ifdef CONFIG_SPL_YMODEM_SUPPORT + case BOOT_DEVICE_UART: + spl_ymodem_load_image(); + break; +#endif +#ifdef CONFIG_SPL_SPI_SUPPORT + case BOOT_DEVICE_SPI: + spi_boot(); + break; +#endif + default: + puts("SPL: Un-supported Boot Device\n"); + debug("Found: %d\n", boot_device); + hang(); + break; + } + + switch (spl_image.os) { + case IH_OS_U_BOOT: + 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"); + spl_board_prepare_for_linux(); + 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(); + } +} + +/* This requires UART clocks to be enabled */ +void preloader_console_init(void) +{ + gd = &gdata; + gd->bd = &bdata; + gd->flags |= GD_FLG_RELOC; + gd->baudrate = CONFIG_BAUDRATE; + + serial_init(); /* serial communications setup */ + + gd->have_console = 1; + + puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \ + U_BOOT_TIME ")\n"); +#ifdef CONFIG_SPL_DISPLAY_PRINT + spl_display_print(); +#endif +} |