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 #ifndef CONFIG_SYS_MONITOR_LEN 39 #define CONFIG_SYS_MONITOR_LEN (200 * 1024) 40 #endif 41 42 u32 *boot_params_ptr = NULL; 43 struct spl_image_info spl_image; 44 45 /* Define board data structure */ 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 /* 56 * Default function to determine if u-boot or the OS should 57 * be started. This implementation always returns 1. 58 * 59 * Please implement your own board specific funcion to do this. 60 * 61 * RETURN 62 * 0 to not start u-boot 63 * positive if u-boot should start 64 */ 65 #ifdef CONFIG_SPL_OS_BOOT 66 __weak int spl_start_uboot(void) 67 { 68 puts("SPL: Please implement spl_start_uboot() for your board\n"); 69 puts("SPL: Direct Linux boot not active!\n"); 70 return 1; 71 } 72 #endif 73 74 void spl_parse_image_header(const struct image_header *header) 75 { 76 u32 header_size = sizeof(struct image_header); 77 78 if (__be32_to_cpu(header->ih_magic) == IH_MAGIC) { 79 spl_image.size = __be32_to_cpu(header->ih_size) + header_size; 80 spl_image.entry_point = __be32_to_cpu(header->ih_load); 81 /* Load including the header */ 82 spl_image.load_addr = spl_image.entry_point - header_size; 83 spl_image.os = header->ih_os; 84 spl_image.name = (const char *)&header->ih_name; 85 debug("spl: payload image: %s load addr: 0x%x size: %d\n", 86 spl_image.name, spl_image.load_addr, spl_image.size); 87 } else { 88 /* Signature not found - assume u-boot.bin */ 89 puts("mkimage signature not found, assuming u-boot.bin ..\n"); 90 debug("mkimage signature not found - ih_magic = %x\n", 91 header->ih_magic); 92 /* Let's assume U-Boot will not be more than 200 KB */ 93 spl_image.size = CONFIG_SYS_MONITOR_LEN; 94 spl_image.entry_point = CONFIG_SYS_TEXT_BASE; 95 spl_image.load_addr = CONFIG_SYS_TEXT_BASE; 96 spl_image.os = IH_OS_U_BOOT; 97 spl_image.name = "U-Boot"; 98 } 99 } 100 101 static void __noreturn jump_to_image_no_args(void) 102 { 103 typedef void __noreturn (*image_entry_noargs_t)(u32 *); 104 image_entry_noargs_t image_entry = 105 (image_entry_noargs_t) spl_image.entry_point; 106 107 debug("image entry point: 0x%X\n", spl_image.entry_point); 108 /* Pass the saved boot_params from rom code */ 109 #if defined(CONFIG_VIRTIO) || defined(CONFIG_ZEBU) 110 image_entry = (image_entry_noargs_t)0x80100000; 111 #endif 112 u32 boot_params_ptr_addr = (u32)&boot_params_ptr; 113 image_entry((u32 *)boot_params_ptr_addr); 114 } 115 116 void board_init_r(gd_t *dummy1, ulong dummy2) 117 { 118 u32 boot_device; 119 debug(">>spl:board_init_r()\n"); 120 121 #ifdef CONFIG_SYS_SPL_MALLOC_START 122 mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START, 123 CONFIG_SYS_SPL_MALLOC_SIZE); 124 #endif 125 126 #ifdef CONFIG_SPL_BOARD_INIT 127 spl_board_init(); 128 #endif 129 130 boot_device = spl_boot_device(); 131 debug("boot device - %d\n", boot_device); 132 switch (boot_device) { 133 #ifdef CONFIG_SPL_MMC_SUPPORT 134 case BOOT_DEVICE_MMC1: 135 case BOOT_DEVICE_MMC2: 136 case BOOT_DEVICE_MMC2_2: 137 spl_mmc_load_image(); 138 break; 139 #endif 140 #ifdef CONFIG_SPL_NAND_SUPPORT 141 case BOOT_DEVICE_NAND: 142 spl_nand_load_image(); 143 break; 144 #endif 145 #ifdef CONFIG_SPL_YMODEM_SUPPORT 146 case BOOT_DEVICE_UART: 147 spl_ymodem_load_image(); 148 break; 149 #endif 150 #ifdef CONFIG_SPL_SPI_SUPPORT 151 case BOOT_DEVICE_SPI: 152 spi_boot(); 153 break; 154 #endif 155 default: 156 puts("SPL: Un-supported Boot Device\n"); 157 debug("Found: %d\n", boot_device); 158 hang(); 159 break; 160 } 161 162 switch (spl_image.os) { 163 case IH_OS_U_BOOT: 164 debug("Jumping to U-Boot\n"); 165 jump_to_image_no_args(); 166 break; 167 #ifdef CONFIG_SPL_OS_BOOT 168 case IH_OS_LINUX: 169 debug("Jumping to Linux\n"); 170 spl_board_prepare_for_linux(); 171 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR); 172 break; 173 #endif 174 default: 175 puts("Unsupported OS image.. Jumping nevertheless..\n"); 176 jump_to_image_no_args(); 177 } 178 } 179 180 /* 181 * This requires UART clocks to be enabled. In order for this to work the 182 * caller must ensure that the gd pointer is valid. 183 */ 184 void preloader_console_init(void) 185 { 186 gd->bd = &bdata; 187 gd->flags |= GD_FLG_RELOC; 188 gd->baudrate = CONFIG_BAUDRATE; 189 190 serial_init(); /* serial communications setup */ 191 192 gd->have_console = 1; 193 194 puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \ 195 U_BOOT_TIME ")\n"); 196 #ifdef CONFIG_SPL_DISPLAY_PRINT 197 spl_display_print(); 198 #endif 199 } 200