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Diffstat (limited to 'common/spl/spl.c')
| -rw-r--r-- | common/spl/spl.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/common/spl/spl.c b/common/spl/spl.c new file mode 100644 index 0000000..c640f87 --- /dev/null +++ b/common/spl/spl.c @@ -0,0 +1,237 @@ +/* + * (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; + +#ifndef CONFIG_SYS_UBOOT_START +#define CONFIG_SYS_UBOOT_START CONFIG_SYS_TEXT_BASE +#endif +#ifndef CONFIG_SYS_MONITOR_LEN +#define CONFIG_SYS_MONITOR_LEN (200 * 1024) +#endif + +u32 *boot_params_ptr = NULL; +struct spl_image_info spl_image; + +/* Define board data structure */ +static bd_t bdata __attribute__ ((section(".data"))); + +inline void hang(void) +{ + puts("### ERROR ### Please RESET the board ###\n"); + for (;;) + ; +} + +/* + * 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 (image_get_magic(header) == IH_MAGIC) { + if (spl_image.flags & SPL_COPY_PAYLOAD_ONLY) { + /* + * On some system (e.g. powerpc), the load-address and + * entry-point is located at address 0. We can't load + * to 0-0x40. So skip header in this case. + */ + spl_image.load_addr = image_get_load(header); + spl_image.entry_point = image_get_ep(header); + spl_image.size = image_get_data_size(header); + } else { + spl_image.entry_point = image_get_load(header); + /* Load including the header */ + spl_image.load_addr = spl_image.entry_point - + header_size; + spl_image.size = image_get_data_size(header) + + header_size; + } + spl_image.os = image_get_os(header); + spl_image.name = image_get_name(header); + 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 */ + 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 = CONFIG_SYS_MONITOR_LEN; + spl_image.entry_point = CONFIG_SYS_UBOOT_START; + spl_image.load_addr = CONFIG_SYS_TEXT_BASE; + spl_image.os = IH_OS_U_BOOT; + spl_image.name = "U-Boot"; + } +} + +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); +} + +#ifdef CONFIG_SPL_RAM_DEVICE +static void spl_ram_load_image(void) +{ + const struct image_header *header; + + /* + * Get the header. It will point to an address defined by handoff + * which will tell where the image located inside the flash. For + * now, it will temporary fixed to address pointed by U-Boot. + */ + header = (struct image_header *) + (CONFIG_SYS_TEXT_BASE - sizeof(struct image_header)); + + spl_parse_image_header(header); +} +#endif + +void board_init_r(gd_t *dummy1, ulong dummy2) +{ + 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_RAM_DEVICE + case BOOT_DEVICE_RAM: + spl_ram_load_image(); + break; +#endif +#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_NOR_SUPPORT + case BOOT_DEVICE_NOR: + spl_nor_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: + spl_spi_load_image(); + break; +#endif + default: + debug("SPL: Un-supported Boot Device\n"); + hang(); + } + + switch (spl_image.os) { + case IH_OS_U_BOOT: + debug("Jumping to U-Boot\n"); + 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); +#endif + default: + debug("Unsupported OS image.. Jumping nevertheless..\n"); + } + jump_to_image_no_args(); +} + +/* + * This requires UART clocks to be enabled. In order for this to work the + * caller must ensure that the gd pointer is valid. + */ +void preloader_console_init(void) +{ + 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 +} |