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_UBOOT_START 39 #define CONFIG_SYS_UBOOT_START CONFIG_SYS_TEXT_BASE 40 #endif 41 #ifndef CONFIG_SYS_MONITOR_LEN 42 #define CONFIG_SYS_MONITOR_LEN (200 * 1024) 43 #endif 44 45 u32 *boot_params_ptr = NULL; 46 struct spl_image_info spl_image; 47 48 /* Define board data structure */ 49 static bd_t bdata __attribute__ ((section(".data"))); 50 51 inline void hang(void) 52 { 53 puts("### ERROR ### Please RESET the board ###\n"); 54 for (;;) 55 ; 56 } 57 58 /* 59 * Default function to determine if u-boot or the OS should 60 * be started. This implementation always returns 1. 61 * 62 * Please implement your own board specific funcion to do this. 63 * 64 * RETURN 65 * 0 to not start u-boot 66 * positive if u-boot should start 67 */ 68 #ifdef CONFIG_SPL_OS_BOOT 69 __weak int spl_start_uboot(void) 70 { 71 puts("SPL: Please implement spl_start_uboot() for your board\n"); 72 puts("SPL: Direct Linux boot not active!\n"); 73 return 1; 74 } 75 #endif 76 77 void spl_parse_image_header(const struct image_header *header) 78 { 79 u32 header_size = sizeof(struct image_header); 80 81 if (image_get_magic(header) == IH_MAGIC) { 82 if (spl_image.flags & SPL_COPY_PAYLOAD_ONLY) { 83 /* 84 * On some system (e.g. powerpc), the load-address and 85 * entry-point is located at address 0. We can't load 86 * to 0-0x40. So skip header in this case. 87 */ 88 spl_image.load_addr = image_get_load(header); 89 spl_image.entry_point = image_get_ep(header); 90 spl_image.size = image_get_data_size(header); 91 } else { 92 spl_image.entry_point = image_get_load(header); 93 /* Load including the header */ 94 spl_image.load_addr = spl_image.entry_point - 95 header_size; 96 spl_image.size = image_get_data_size(header) + 97 header_size; 98 } 99 spl_image.os = image_get_os(header); 100 spl_image.name = image_get_name(header); 101 debug("spl: payload image: %s load addr: 0x%x size: %d\n", 102 spl_image.name, spl_image.load_addr, spl_image.size); 103 } else { 104 /* Signature not found - assume u-boot.bin */ 105 debug("mkimage signature not found - ih_magic = %x\n", 106 header->ih_magic); 107 /* Let's assume U-Boot will not be more than 200 KB */ 108 spl_image.size = CONFIG_SYS_MONITOR_LEN; 109 spl_image.entry_point = CONFIG_SYS_UBOOT_START; 110 spl_image.load_addr = CONFIG_SYS_TEXT_BASE; 111 spl_image.os = IH_OS_U_BOOT; 112 spl_image.name = "U-Boot"; 113 } 114 } 115 116 static void __noreturn jump_to_image_no_args(void) 117 { 118 typedef void __noreturn (*image_entry_noargs_t)(u32 *); 119 image_entry_noargs_t image_entry = 120 (image_entry_noargs_t) spl_image.entry_point; 121 122 debug("image entry point: 0x%X\n", spl_image.entry_point); 123 /* Pass the saved boot_params from rom code */ 124 #if defined(CONFIG_VIRTIO) || defined(CONFIG_ZEBU) 125 image_entry = (image_entry_noargs_t)0x80100000; 126 #endif 127 u32 boot_params_ptr_addr = (u32)&boot_params_ptr; 128 image_entry((u32 *)boot_params_ptr_addr); 129 } 130 131 #ifdef CONFIG_SPL_RAM_DEVICE 132 static void spl_ram_load_image(void) 133 { 134 const struct image_header *header; 135 136 /* 137 * Get the header. It will point to an address defined by handoff 138 * which will tell where the image located inside the flash. For 139 * now, it will temporary fixed to address pointed by U-Boot. 140 */ 141 header = (struct image_header *) 142 (CONFIG_SYS_TEXT_BASE - sizeof(struct image_header)); 143 144 spl_parse_image_header(header); 145 } 146 #endif 147 148 void board_init_r(gd_t *dummy1, ulong dummy2) 149 { 150 u32 boot_device; 151 debug(">>spl:board_init_r()\n"); 152 153 #ifdef CONFIG_SYS_SPL_MALLOC_START 154 mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START, 155 CONFIG_SYS_SPL_MALLOC_SIZE); 156 #endif 157 158 timer_init(); 159 160 #ifdef CONFIG_SPL_BOARD_INIT 161 spl_board_init(); 162 #endif 163 164 boot_device = spl_boot_device(); 165 debug("boot device - %d\n", boot_device); 166 switch (boot_device) { 167 #ifdef CONFIG_SPL_RAM_DEVICE 168 case BOOT_DEVICE_RAM: 169 spl_ram_load_image(); 170 break; 171 #endif 172 #ifdef CONFIG_SPL_MMC_SUPPORT 173 case BOOT_DEVICE_MMC1: 174 case BOOT_DEVICE_MMC2: 175 case BOOT_DEVICE_MMC2_2: 176 spl_mmc_load_image(); 177 break; 178 #endif 179 #ifdef CONFIG_SPL_NAND_SUPPORT 180 case BOOT_DEVICE_NAND: 181 spl_nand_load_image(); 182 break; 183 #endif 184 #ifdef CONFIG_SPL_NOR_SUPPORT 185 case BOOT_DEVICE_NOR: 186 spl_nor_load_image(); 187 break; 188 #endif 189 #ifdef CONFIG_SPL_YMODEM_SUPPORT 190 case BOOT_DEVICE_UART: 191 spl_ymodem_load_image(); 192 break; 193 #endif 194 #ifdef CONFIG_SPL_SPI_SUPPORT 195 case BOOT_DEVICE_SPI: 196 spl_spi_load_image(); 197 break; 198 #endif 199 #ifdef CONFIG_SPL_ETH_SUPPORT 200 case BOOT_DEVICE_CPGMAC: 201 #ifdef CONFIG_SPL_ETH_DEVICE 202 spl_net_load_image(CONFIG_SPL_ETH_DEVICE); 203 #else 204 spl_net_load_image(NULL); 205 #endif 206 break; 207 #endif 208 default: 209 debug("SPL: Un-supported Boot Device\n"); 210 hang(); 211 } 212 213 switch (spl_image.os) { 214 case IH_OS_U_BOOT: 215 debug("Jumping to U-Boot\n"); 216 break; 217 #ifdef CONFIG_SPL_OS_BOOT 218 case IH_OS_LINUX: 219 debug("Jumping to Linux\n"); 220 spl_board_prepare_for_linux(); 221 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR); 222 #endif 223 default: 224 debug("Unsupported OS image.. Jumping nevertheless..\n"); 225 } 226 jump_to_image_no_args(); 227 } 228 229 /* 230 * This requires UART clocks to be enabled. In order for this to work the 231 * caller must ensure that the gd pointer is valid. 232 */ 233 void preloader_console_init(void) 234 { 235 gd->bd = &bdata; 236 gd->flags |= GD_FLG_RELOC; 237 gd->baudrate = CONFIG_BAUDRATE; 238 239 serial_init(); /* serial communications setup */ 240 241 gd->have_console = 1; 242 243 puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \ 244 U_BOOT_TIME ")\n"); 245 #ifdef CONFIG_SPL_DISPLAY_PRINT 246 spl_display_print(); 247 #endif 248 } 249