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 <spl.h> 27 #include <asm/u-boot.h> 28 #include <nand.h> 29 #include <fat.h> 30 #include <version.h> 31 #include <i2c.h> 32 #include <image.h> 33 #include <malloc.h> 34 #include <linux/compiler.h> 35 36 DECLARE_GLOBAL_DATA_PTR; 37 38 u32 *boot_params_ptr = NULL; 39 struct spl_image_info spl_image; 40 41 /* Define board data structure */ 42 static bd_t bdata __attribute__ ((section(".data"))); 43 44 inline void hang(void) 45 { 46 puts("### ERROR ### Please RESET the board ###\n"); 47 for (;;) 48 ; 49 } 50 51 /* 52 * Default function to determine if u-boot or the OS should 53 * be started. This implementation always returns 1. 54 * 55 * Please implement your own board specific funcion to do this. 56 * 57 * RETURN 58 * 0 to not start u-boot 59 * positive if u-boot should start 60 */ 61 #ifdef CONFIG_SPL_OS_BOOT 62 __weak int spl_start_uboot(void) 63 { 64 puts("SPL: Please implement spl_start_uboot() for your board\n"); 65 puts("SPL: Direct Linux boot not active!\n"); 66 return 1; 67 } 68 #endif 69 70 void spl_parse_image_header(const struct image_header *header) 71 { 72 u32 header_size = sizeof(struct image_header); 73 74 if (__be32_to_cpu(header->ih_magic) == IH_MAGIC) { 75 spl_image.size = __be32_to_cpu(header->ih_size) + header_size; 76 spl_image.entry_point = __be32_to_cpu(header->ih_load); 77 /* Load including the header */ 78 spl_image.load_addr = spl_image.entry_point - header_size; 79 spl_image.os = header->ih_os; 80 spl_image.name = (const char *)&header->ih_name; 81 debug("spl: payload image: %s load addr: 0x%x size: %d\n", 82 spl_image.name, spl_image.load_addr, spl_image.size); 83 } else { 84 /* Signature not found - assume u-boot.bin */ 85 puts("mkimage signature not found, assuming u-boot.bin ..\n"); 86 debug("mkimage signature not found - ih_magic = %x\n", 87 header->ih_magic); 88 /* Let's assume U-Boot will not be more than 200 KB */ 89 spl_image.size = 200 * 1024; 90 spl_image.entry_point = CONFIG_SYS_TEXT_BASE; 91 spl_image.load_addr = CONFIG_SYS_TEXT_BASE; 92 spl_image.os = IH_OS_U_BOOT; 93 spl_image.name = "U-Boot"; 94 } 95 } 96 97 static void __noreturn jump_to_image_no_args(void) 98 { 99 typedef void __noreturn (*image_entry_noargs_t)(u32 *); 100 image_entry_noargs_t image_entry = 101 (image_entry_noargs_t) spl_image.entry_point; 102 103 debug("image entry point: 0x%X\n", spl_image.entry_point); 104 /* Pass the saved boot_params from rom code */ 105 #if defined(CONFIG_VIRTIO) || defined(CONFIG_ZEBU) 106 image_entry = (image_entry_noargs_t)0x80100000; 107 #endif 108 u32 boot_params_ptr_addr = (u32)&boot_params_ptr; 109 image_entry((u32 *)boot_params_ptr_addr); 110 } 111 112 void board_init_r(gd_t *dummy1, ulong dummy2) 113 { 114 u32 boot_device; 115 debug(">>spl:board_init_r()\n"); 116 117 #ifdef CONFIG_SYS_SPL_MALLOC_START 118 mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START, 119 CONFIG_SYS_SPL_MALLOC_SIZE); 120 #endif 121 122 #ifdef CONFIG_SPL_BOARD_INIT 123 spl_board_init(); 124 #endif 125 126 boot_device = spl_boot_device(); 127 debug("boot device - %d\n", boot_device); 128 switch (boot_device) { 129 #ifdef CONFIG_SPL_MMC_SUPPORT 130 case BOOT_DEVICE_MMC1: 131 case BOOT_DEVICE_MMC2: 132 case BOOT_DEVICE_MMC2_2: 133 spl_mmc_load_image(); 134 break; 135 #endif 136 #ifdef CONFIG_SPL_NAND_SUPPORT 137 case BOOT_DEVICE_NAND: 138 spl_nand_load_image(); 139 break; 140 #endif 141 #ifdef CONFIG_SPL_YMODEM_SUPPORT 142 case BOOT_DEVICE_UART: 143 spl_ymodem_load_image(); 144 break; 145 #endif 146 #ifdef CONFIG_SPL_SPI_SUPPORT 147 case BOOT_DEVICE_SPI: 148 spi_boot(); 149 break; 150 #endif 151 default: 152 puts("SPL: Un-supported Boot Device\n"); 153 debug("Found: %d\n", boot_device); 154 hang(); 155 break; 156 } 157 158 switch (spl_image.os) { 159 case IH_OS_U_BOOT: 160 debug("Jumping to U-Boot\n"); 161 jump_to_image_no_args(); 162 break; 163 #ifdef CONFIG_SPL_OS_BOOT 164 case IH_OS_LINUX: 165 debug("Jumping to Linux\n"); 166 spl_board_prepare_for_linux(); 167 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR); 168 break; 169 #endif 170 default: 171 puts("Unsupported OS image.. Jumping nevertheless..\n"); 172 jump_to_image_no_args(); 173 } 174 } 175 176 /* 177 * This requires UART clocks to be enabled. In order for this to work the 178 * caller must ensure that the gd pointer is valid. 179 */ 180 void preloader_console_init(void) 181 { 182 gd->bd = &bdata; 183 gd->flags |= GD_FLG_RELOC; 184 gd->baudrate = CONFIG_BAUDRATE; 185 186 serial_init(); /* serial communications setup */ 187 188 gd->have_console = 1; 189 190 puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \ 191 U_BOOT_TIME ")\n"); 192 #ifdef CONFIG_SPL_DISPLAY_PRINT 193 spl_display_print(); 194 #endif 195 } 196