arch/arm/cpu/armv7/omap-common/spl.c

   1 /*
   2  * (C) Copyright 2010
   3  * Texas Instruments, <www.ti.com>
   4  *
   5  * Aneesh V <aneesh@ti.com>
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25 #include <common.h>
  26 #include <asm/u-boot.h>
  27 #include <asm/utils.h>
  28 #include <asm/arch/sys_proto.h>
  29 #include <nand.h>
  30 #include <mmc.h>
  31 #include <fat.h>
  32 #include <version.h>
  33 #include <asm/omap_common.h>
  34 #include <asm/arch/mmc_host_def.h>
  35 #include <i2c.h>
  36 #include <image.h>
  37
  38 DECLARE_GLOBAL_DATA_PTR;
  39
  40 struct spl_image_info spl_image;
  41
  42 /* Define global data structure pointer to it*/
  43 static gd_t gdata __attribute__ ((section(".data")));
  44 static bd_t bdata __attribute__ ((section(".data")));
  45
  46 inline void hang(void)
  47 {
  48         puts("### ERROR ### Please RESET the board ###\n");
  49         for (;;)
  50                 ;
  51 }
  52
  53 void board_init_f(ulong dummy)
  54 {
  55         /*
  56          * We call relocate_code() with relocation target same as the
  57          * CONFIG_SYS_SPL_TEXT_BASE. This will result in relocation getting
  58          * skipped. Instead, only .bss initialization will happen. That's
  59          * all we need
  60          */
  61         debug(">>board_init_f()\n");
  62         relocate_code(CONFIG_SPL_STACK, &gdata, CONFIG_SPL_TEXT_BASE);
  63 }
  64
  65 void spl_parse_image_header(const struct image_header *header)
  66 {
  67         u32 header_size = sizeof(struct image_header);
  68
  69         if (__be32_to_cpu(header->ih_magic) == IH_MAGIC) {
  70                 spl_image.size = __be32_to_cpu(header->ih_size) + header_size;
  71                 spl_image.entry_point = __be32_to_cpu(header->ih_load);
  72                 /* Load including the header */
  73                 spl_image.load_addr = spl_image.entry_point - header_size;
  74                 spl_image.os = header->ih_os;
  75                 spl_image.name = (const char *)&header->ih_name;
  76                 debug("spl: payload image: %s load addr: 0x%x size: %d\n",
  77                         spl_image.name, spl_image.load_addr, spl_image.size);
  78         } else {
  79                 /* Signature not found - assume u-boot.bin */
  80                 printf("mkimage signature not found - ih_magic = %x\n",
  81                         header->ih_magic);
  82                 puts("Assuming u-boot.bin ..\n");
  83                 /* Let's assume U-Boot will not be more than 200 KB */
  84                 spl_image.size = 200 * 1024;
  85                 spl_image.entry_point = CONFIG_SYS_TEXT_BASE;
  86                 spl_image.load_addr = CONFIG_SYS_TEXT_BASE;
  87                 spl_image.os = IH_OS_U_BOOT;
  88                 spl_image.name = "U-Boot";
  89         }
  90 }
  91
  92 static void jump_to_image_no_args(void)
  93 {
  94         typedef void (*image_entry_noargs_t)(void)__attribute__ ((noreturn));
  95         image_entry_noargs_t image_entry =
  96                         (image_entry_noargs_t) spl_image.entry_point;
  97
  98         debug("image entry point: 0x%X\n", spl_image.entry_point);
  99         image_entry();
 100 }
 101
 102 void jump_to_image_no_args(void) __attribute__ ((noreturn));
 103 void board_init_r(gd_t *id, ulong dummy)
 104 {
 105         u32 boot_device;
 106         debug(">>spl:board_init_r()\n");
 107
 108         timer_init();
 109         i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 110
 111         boot_device = omap_boot_device();
 112         debug("boot device - %d\n", boot_device);
 113         switch (boot_device) {
 114 #ifdef CONFIG_SPL_MMC_SUPPORT
 115         case BOOT_DEVICE_MMC1:
 116         case BOOT_DEVICE_MMC2:
 117                 spl_mmc_load_image();
 118                 break;
 119 #endif
 120 #ifdef CONFIG_SPL_NAND_SUPPORT
 121         case BOOT_DEVICE_NAND:
 122                 spl_nand_load_image();
 123                 break;
 124 #endif
 125         default:
 126                 printf("SPL: Un-supported Boot Device - %d!!!\n", boot_device);
 127                 hang();
 128                 break;
 129         }
 130
 131         switch (spl_image.os) {
 132         case IH_OS_U_BOOT:
 133                 debug("Jumping to U-Boot\n");
 134                 jump_to_image_no_args();
 135                 break;
 136         default:
 137                 puts("Unsupported OS image.. Jumping nevertheless..\n");
 138                 jump_to_image_no_args();
 139         }
 140 }
 141
 142 /* This requires UART clocks to be enabled */
 143 void preloader_console_init(void)
 144 {
 145         const char *u_boot_rev = U_BOOT_VERSION;
 146         char rev_string_buffer[50];
 147
 148         gd = &gdata;
 149         gd->bd = &bdata;
 150         gd->flags |= GD_FLG_RELOC;
 151         gd->baudrate = CONFIG_BAUDRATE;
 152
 153         serial_init();          /* serial communications setup */
 154
 155         /* Avoid a second "U-Boot" coming from this string */
 156         u_boot_rev = &u_boot_rev[7];
 157
 158         printf("\nU-Boot SPL %s (%s - %s)\n", u_boot_rev, U_BOOT_DATE,
 159                 U_BOOT_TIME);
 160         omap_rev_string(rev_string_buffer);
 161         printf("Texas Instruments %s\n", rev_string_buffer);
 162 }
 163
 164 void __omap_rev_string(char *str)
 165 {
 166         sprintf(str, "Revision detection unimplemented");
 167 }
 168
 169 void omap_rev_string(char *str)
 170         __attribute__((weak, alias("__omap_rev_string")));