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 /* 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 /* 71 * Weak default function for board specific cleanup/preparation before 72 * Linux boot. Some boards/platforms might not need it, so just provide 73 * an empty stub here. 74 */ 75 __weak void spl_board_prepare_for_linux(void) 76 { 77 /* Nothing to do! */ 78 } 79 80 void spl_parse_image_header(const struct image_header *header) 81 { 82 u32 header_size = sizeof(struct image_header); 83 84 if (image_get_magic(header) == IH_MAGIC) { 85 if (spl_image.flags & SPL_COPY_PAYLOAD_ONLY) { 86 /* 87 * On some system (e.g. powerpc), the load-address and 88 * entry-point is located at address 0. We can't load 89 * to 0-0x40. So skip header in this case. 90 */ 91 spl_image.load_addr = image_get_load(header); 92 spl_image.entry_point = image_get_ep(header); 93 spl_image.size = image_get_data_size(header); 94 } else { 95 spl_image.entry_point = image_get_load(header); 96 /* Load including the header */ 97 spl_image.load_addr = spl_image.entry_point - 98 header_size; 99 spl_image.size = image_get_data_size(header) + 100 header_size; 101 } 102 spl_image.os = image_get_os(header); 103 spl_image.name = image_get_name(header); 104 debug("spl: payload image: %s load addr: 0x%x size: %d\n", 105 spl_image.name, spl_image.load_addr, spl_image.size); 106 } else { 107 /* Signature not found - assume u-boot.bin */ 108 debug("mkimage signature not found - ih_magic = %x\n", 109 header->ih_magic); 110 /* Let's assume U-Boot will not be more than 200 KB */ 111 spl_image.size = CONFIG_SYS_MONITOR_LEN; 112 spl_image.entry_point = CONFIG_SYS_UBOOT_START; 113 spl_image.load_addr = CONFIG_SYS_TEXT_BASE; 114 spl_image.os = IH_OS_U_BOOT; 115 spl_image.name = "U-Boot"; 116 } 117 } 118 119 __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image) 120 { 121 typedef void __noreturn (*image_entry_noargs_t)(void); 122 123 image_entry_noargs_t image_entry = 124 (image_entry_noargs_t) spl_image->entry_point; 125 126 debug("image entry point: 0x%X\n", spl_image->entry_point); 127 image_entry(); 128 } 129 130 #ifdef CONFIG_SPL_RAM_DEVICE 131 static void spl_ram_load_image(void) 132 { 133 const struct image_header *header; 134 135 /* 136 * Get the header. It will point to an address defined by handoff 137 * which will tell where the image located inside the flash. For 138 * now, it will temporary fixed to address pointed by U-Boot. 139 */ 140 header = (struct image_header *) 141 (CONFIG_SYS_TEXT_BASE - sizeof(struct image_header)); 142 143 spl_parse_image_header(header); 144 } 145 #endif 146 147 void board_init_r(gd_t *dummy1, ulong dummy2) 148 { 149 u32 boot_device; 150 debug(">>spl:board_init_r()\n"); 151 152 #ifdef CONFIG_SYS_SPL_MALLOC_START 153 mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START, 154 CONFIG_SYS_SPL_MALLOC_SIZE); 155 #endif 156 157 #ifndef CONFIG_PPC 158 /* 159 * timer_init() does not exist on PPC systems. The timer is initialized 160 * and enabled (decrementer) in interrupt_init() here. 161 */ 162 timer_init(); 163 #endif 164 165 #ifdef CONFIG_SPL_BOARD_INIT 166 spl_board_init(); 167 #endif 168 169 boot_device = spl_boot_device(); 170 debug("boot device - %d\n", boot_device); 171 switch (boot_device) { 172 #ifdef CONFIG_SPL_RAM_DEVICE 173 case BOOT_DEVICE_RAM: 174 spl_ram_load_image(); 175 break; 176 #endif 177 #ifdef CONFIG_SPL_MMC_SUPPORT 178 case BOOT_DEVICE_MMC1: 179 case BOOT_DEVICE_MMC2: 180 case BOOT_DEVICE_MMC2_2: 181 spl_mmc_load_image(); 182 break; 183 #endif 184 #ifdef CONFIG_SPL_NAND_SUPPORT 185 case BOOT_DEVICE_NAND: 186 spl_nand_load_image(); 187 break; 188 #endif 189 #ifdef CONFIG_SPL_ONENAND_SUPPORT 190 case BOOT_DEVICE_ONENAND: 191 spl_onenand_load_image(); 192 break; 193 #endif 194 #ifdef CONFIG_SPL_NOR_SUPPORT 195 case BOOT_DEVICE_NOR: 196 spl_nor_load_image(); 197 break; 198 #endif 199 #ifdef CONFIG_SPL_YMODEM_SUPPORT 200 case BOOT_DEVICE_UART: 201 spl_ymodem_load_image(); 202 break; 203 #endif 204 #ifdef CONFIG_SPL_SPI_SUPPORT 205 case BOOT_DEVICE_SPI: 206 spl_spi_load_image(); 207 break; 208 #endif 209 #ifdef CONFIG_SPL_ETH_SUPPORT 210 case BOOT_DEVICE_CPGMAC: 211 #ifdef CONFIG_SPL_ETH_DEVICE 212 spl_net_load_image(CONFIG_SPL_ETH_DEVICE); 213 #else 214 spl_net_load_image(NULL); 215 #endif 216 break; 217 #endif 218 #ifdef CONFIG_SPL_USBETH_SUPPORT 219 case BOOT_DEVICE_USBETH: 220 spl_net_load_image("usb_ether"); 221 break; 222 #endif 223 default: 224 debug("SPL: Un-supported Boot Device\n"); 225 hang(); 226 } 227 228 switch (spl_image.os) { 229 case IH_OS_U_BOOT: 230 debug("Jumping to U-Boot\n"); 231 break; 232 #ifdef CONFIG_SPL_OS_BOOT 233 case IH_OS_LINUX: 234 debug("Jumping to Linux\n"); 235 spl_board_prepare_for_linux(); 236 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR); 237 #endif 238 default: 239 debug("Unsupported OS image.. Jumping nevertheless..\n"); 240 } 241 jump_to_image_no_args(&spl_image); 242 } 243 244 /* 245 * This requires UART clocks to be enabled. In order for this to work the 246 * caller must ensure that the gd pointer is valid. 247 */ 248 void preloader_console_init(void) 249 { 250 gd->bd = &bdata; 251 gd->baudrate = CONFIG_BAUDRATE; 252 253 serial_init(); /* serial communications setup */ 254 255 gd->have_console = 1; 256 257 puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \ 258 U_BOOT_TIME ")\n"); 259 #ifdef CONFIG_SPL_DISPLAY_PRINT 260 spl_display_print(); 261 #endif 262 } 263