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 /* 78 * Weak default function for board specific cleanup/preparation before 79 * Linux boot. Some boards/platforms might not need it, so just provide 80 * an empty stub here. 81 */ 82 __weak void spl_board_prepare_for_linux(void) 83 { 84 /* Nothing to do! */ 85 } 86 87 void spl_parse_image_header(const struct image_header *header) 88 { 89 u32 header_size = sizeof(struct image_header); 90 91 if (image_get_magic(header) == IH_MAGIC) { 92 if (spl_image.flags & SPL_COPY_PAYLOAD_ONLY) { 93 /* 94 * On some system (e.g. powerpc), the load-address and 95 * entry-point is located at address 0. We can't load 96 * to 0-0x40. So skip header in this case. 97 */ 98 spl_image.load_addr = image_get_load(header); 99 spl_image.entry_point = image_get_ep(header); 100 spl_image.size = image_get_data_size(header); 101 } else { 102 spl_image.entry_point = image_get_load(header); 103 /* Load including the header */ 104 spl_image.load_addr = spl_image.entry_point - 105 header_size; 106 spl_image.size = image_get_data_size(header) + 107 header_size; 108 } 109 spl_image.os = image_get_os(header); 110 spl_image.name = image_get_name(header); 111 debug("spl: payload image: %s load addr: 0x%x size: %d\n", 112 spl_image.name, spl_image.load_addr, spl_image.size); 113 } else { 114 /* Signature not found - assume u-boot.bin */ 115 debug("mkimage signature not found - ih_magic = %x\n", 116 header->ih_magic); 117 /* Let's assume U-Boot will not be more than 200 KB */ 118 spl_image.size = CONFIG_SYS_MONITOR_LEN; 119 spl_image.entry_point = CONFIG_SYS_UBOOT_START; 120 spl_image.load_addr = CONFIG_SYS_TEXT_BASE; 121 spl_image.os = IH_OS_U_BOOT; 122 spl_image.name = "U-Boot"; 123 } 124 } 125 126 __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image) 127 { 128 typedef void __noreturn (*image_entry_noargs_t)(void); 129 130 image_entry_noargs_t image_entry = 131 (image_entry_noargs_t) spl_image->entry_point; 132 133 debug("image entry point: 0x%X\n", spl_image->entry_point); 134 image_entry(); 135 } 136 137 #ifdef CONFIG_SPL_RAM_DEVICE 138 static void spl_ram_load_image(void) 139 { 140 const struct image_header *header; 141 142 /* 143 * Get the header. It will point to an address defined by handoff 144 * which will tell where the image located inside the flash. For 145 * now, it will temporary fixed to address pointed by U-Boot. 146 */ 147 header = (struct image_header *) 148 (CONFIG_SYS_TEXT_BASE - sizeof(struct image_header)); 149 150 spl_parse_image_header(header); 151 } 152 #endif 153 154 void board_init_r(gd_t *dummy1, ulong dummy2) 155 { 156 u32 boot_device; 157 debug(">>spl:board_init_r()\n"); 158 159 #ifdef CONFIG_SYS_SPL_MALLOC_START 160 mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START, 161 CONFIG_SYS_SPL_MALLOC_SIZE); 162 #endif 163 164 #ifndef CONFIG_PPC 165 /* 166 * timer_init() does not exist on PPC systems. The timer is initialized 167 * and enabled (decrementer) in interrupt_init() here. 168 */ 169 timer_init(); 170 #endif 171 172 #ifdef CONFIG_SPL_BOARD_INIT 173 spl_board_init(); 174 #endif 175 176 boot_device = spl_boot_device(); 177 debug("boot device - %d\n", boot_device); 178 switch (boot_device) { 179 #ifdef CONFIG_SPL_RAM_DEVICE 180 case BOOT_DEVICE_RAM: 181 spl_ram_load_image(); 182 break; 183 #endif 184 #ifdef CONFIG_SPL_MMC_SUPPORT 185 case BOOT_DEVICE_MMC1: 186 case BOOT_DEVICE_MMC2: 187 case BOOT_DEVICE_MMC2_2: 188 spl_mmc_load_image(); 189 break; 190 #endif 191 #ifdef CONFIG_SPL_NAND_SUPPORT 192 case BOOT_DEVICE_NAND: 193 spl_nand_load_image(); 194 break; 195 #endif 196 #ifdef CONFIG_SPL_ONENAND_SUPPORT 197 case BOOT_DEVICE_ONENAND: 198 spl_onenand_load_image(); 199 break; 200 #endif 201 #ifdef CONFIG_SPL_NOR_SUPPORT 202 case BOOT_DEVICE_NOR: 203 spl_nor_load_image(); 204 break; 205 #endif 206 #ifdef CONFIG_SPL_YMODEM_SUPPORT 207 case BOOT_DEVICE_UART: 208 spl_ymodem_load_image(); 209 break; 210 #endif 211 #ifdef CONFIG_SPL_SPI_SUPPORT 212 case BOOT_DEVICE_SPI: 213 spl_spi_load_image(); 214 break; 215 #endif 216 #ifdef CONFIG_SPL_ETH_SUPPORT 217 case BOOT_DEVICE_CPGMAC: 218 #ifdef CONFIG_SPL_ETH_DEVICE 219 spl_net_load_image(CONFIG_SPL_ETH_DEVICE); 220 #else 221 spl_net_load_image(NULL); 222 #endif 223 break; 224 #endif 225 #ifdef CONFIG_SPL_USBETH_SUPPORT 226 case BOOT_DEVICE_USBETH: 227 spl_net_load_image("usb_ether"); 228 break; 229 #endif 230 default: 231 debug("SPL: Un-supported Boot Device\n"); 232 hang(); 233 } 234 235 switch (spl_image.os) { 236 case IH_OS_U_BOOT: 237 debug("Jumping to U-Boot\n"); 238 break; 239 #ifdef CONFIG_SPL_OS_BOOT 240 case IH_OS_LINUX: 241 debug("Jumping to Linux\n"); 242 spl_board_prepare_for_linux(); 243 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR); 244 #endif 245 default: 246 debug("Unsupported OS image.. Jumping nevertheless..\n"); 247 } 248 jump_to_image_no_args(&spl_image); 249 } 250 251 /* 252 * This requires UART clocks to be enabled. In order for this to work the 253 * caller must ensure that the gd pointer is valid. 254 */ 255 void preloader_console_init(void) 256 { 257 gd->bd = &bdata; 258 gd->baudrate = CONFIG_BAUDRATE; 259 260 serial_init(); /* serial communications setup */ 261 262 gd->have_console = 1; 263 264 puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \ 265 U_BOOT_TIME ")\n"); 266 #ifdef CONFIG_SPL_DISPLAY_PRINT 267 spl_display_print(); 268 #endif 269 } 270