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 #include <malloc.h>
  38
  39 DECLARE_GLOBAL_DATA_PTR;
  40
  41 u32* boot_params_ptr = NULL;
  42 struct spl_image_info spl_image;
  43
  44 /* Define global data structure pointer to it*/
  45 static gd_t gdata __attribute__ ((section(".data")));
  46 static bd_t bdata __attribute__ ((section(".data")));
  47
  48 inline void hang(void)
  49 {
  50         puts("### ERROR ### Please RESET the board ###\n");
  51         for (;;)
  52                 ;
  53 }
  54
  55 void board_init_f(ulong dummy)
  56 {
  57         /*
  58          * We call relocate_code() with relocation target same as the
  59          * CONFIG_SYS_SPL_TEXT_BASE. This will result in relocation getting
  60          * skipped. Instead, only .bss initialization will happen. That's
  61          * all we need
  62          */
  63         debug(">>board_init_f()\n");
  64         relocate_code(CONFIG_SPL_STACK, &gdata, CONFIG_SPL_TEXT_BASE);
  65 }
  66
  67 void spl_parse_image_header(const struct image_header *header)
  68 {
  69         u32 header_size = sizeof(struct image_header);
  70
  71         if (__be32_to_cpu(header->ih_magic) == IH_MAGIC) {
  72                 spl_image.size = __be32_to_cpu(header->ih_size) + header_size;
  73                 spl_image.entry_point = __be32_to_cpu(header->ih_load);
  74                 /* Load including the header */
  75                 spl_image.load_addr = spl_image.entry_point - header_size;
  76                 spl_image.os = header->ih_os;
  77                 spl_image.name = (const char *)&header->ih_name;
  78                 debug("spl: payload image: %s load addr: 0x%x size: %d\n",
  79                         spl_image.name, spl_image.load_addr, spl_image.size);
  80         } else {
  81                 /* Signature not found - assume u-boot.bin */
  82                 printf("mkimage signature not found - ih_magic = %x\n",
  83                         header->ih_magic);
  84                 puts("Assuming u-boot.bin ..\n");
  85                 /* Let's assume U-Boot will not be more than 200 KB */
  86                 spl_image.size = 200 * 1024;
  87                 spl_image.entry_point = CONFIG_SYS_TEXT_BASE;
  88                 spl_image.load_addr = CONFIG_SYS_TEXT_BASE;
  89                 spl_image.os = IH_OS_U_BOOT;
  90                 spl_image.name = "U-Boot";
  91         }
  92 }
  93
  94 static void jump_to_image_no_args(void)
  95 {
  96         typedef void (*image_entry_noargs_t)(u32 *)__attribute__ ((noreturn));
  97         image_entry_noargs_t image_entry =
  98                         (image_entry_noargs_t) spl_image.entry_point;
  99
 100         debug("image entry point: 0x%X\n", spl_image.entry_point);
 101         /* Pass the saved boot_params from rom code */
 102 #if defined(CONFIG_VIRTIO) || defined(CONFIG_ZEBU)
 103         image_entry = 0x80100000;
 104 #endif
 105         image_entry((u32 *)&boot_params_ptr);
 106 }
 107
 108 void jump_to_image_no_args(void) __attribute__ ((noreturn));
 109 void board_init_r(gd_t *id, ulong dummy)
 110 {
 111         u32 boot_device;
 112         debug(">>spl:board_init_r()\n");
 113
 114         mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
 115                         CONFIG_SYS_SPL_MALLOC_SIZE);
 116
 117         timer_init();
 118         i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 119
 120         boot_device = omap_boot_device();
 121         debug("boot device - %d\n", boot_device);
 122         switch (boot_device) {
 123 #ifdef CONFIG_SPL_MMC_SUPPORT
 124         case BOOT_DEVICE_MMC1:
 125         case BOOT_DEVICE_MMC2:
 126                 spl_mmc_load_image();
 127                 break;
 128 #endif
 129 #ifdef CONFIG_SPL_NAND_SUPPORT
 130         case BOOT_DEVICE_NAND:
 131                 spl_nand_load_image();
 132                 break;
 133 #endif
 134         default:
 135                 printf("SPL: Un-supported Boot Device - %d!!!\n", boot_device);
 136                 hang();
 137                 break;
 138         }
 139
 140         switch (spl_image.os) {
 141         case IH_OS_U_BOOT:
 142                 debug("Jumping to U-Boot\n");
 143                 jump_to_image_no_args();
 144                 break;
 145         default:
 146                 puts("Unsupported OS image.. Jumping nevertheless..\n");
 147                 jump_to_image_no_args();
 148         }
 149 }
 150
 151 /* This requires UART clocks to be enabled */
 152 void preloader_console_init(void)
 153 {
 154         const char *u_boot_rev = U_BOOT_VERSION;
 155         char rev_string_buffer[50];
 156
 157         gd = &gdata;
 158         gd->bd = &bdata;
 159         gd->flags |= GD_FLG_RELOC;
 160         gd->baudrate = CONFIG_BAUDRATE;
 161
 162         serial_init();          /* serial communications setup */
 163
 164         gd->have_console = 1;
 165
 166         /* Avoid a second "U-Boot" coming from this string */
 167         u_boot_rev = &u_boot_rev[7];
 168
 169         printf("\nU-Boot SPL %s (%s - %s)\n", u_boot_rev, U_BOOT_DATE,
 170                 U_BOOT_TIME);
 171         omap_rev_string(rev_string_buffer);
 172         printf("Texas Instruments %s\n", rev_string_buffer);
 173 }
 174
 175 void __omap_rev_string(char *str)
 176 {
 177         sprintf(str, "Revision detection unimplemented");
 178 }
 179
 180 void omap_rev_string(char *str)
 181         __attribute__((weak, alias("__omap_rev_string")));