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)(u32 *); 129 image_entry_noargs_t image_entry = 130 (image_entry_noargs_t) spl_image->entry_point; 131 132 debug("image entry point: 0x%X\n", spl_image->entry_point); 133 /* Pass the saved boot_params from rom code */ 134 #if defined(CONFIG_VIRTIO) || defined(CONFIG_ZEBU) 135 image_entry = (image_entry_noargs_t)0x80100000; 136 #endif 137 u32 boot_params_ptr_addr = (u32)&boot_params_ptr; 138 image_entry((u32 *)boot_params_ptr_addr); 139 } 140 141 #ifdef CONFIG_SPL_RAM_DEVICE 142 static void spl_ram_load_image(void) 143 { 144 const struct image_header *header; 145 146 /* 147 * Get the header. It will point to an address defined by handoff 148 * which will tell where the image located inside the flash. For 149 * now, it will temporary fixed to address pointed by U-Boot. 150 */ 151 header = (struct image_header *) 152 (CONFIG_SYS_TEXT_BASE - sizeof(struct image_header)); 153 154 spl_parse_image_header(header); 155 } 156 #endif 157 158 void board_init_r(gd_t *dummy1, ulong dummy2) 159 { 160 u32 boot_device; 161 debug(">>spl:board_init_r()\n"); 162 163 #ifdef CONFIG_SYS_SPL_MALLOC_START 164 mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START, 165 CONFIG_SYS_SPL_MALLOC_SIZE); 166 #endif 167 168 #ifndef CONFIG_PPC 169 /* 170 * timer_init() does not exist on PPC systems. The timer is initialized 171 * and enabled (decrementer) in interrupt_init() here. 172 */ 173 timer_init(); 174 #endif 175 176 #ifdef CONFIG_SPL_BOARD_INIT 177 spl_board_init(); 178 #endif 179 180 boot_device = spl_boot_device(); 181 debug("boot device - %d\n", boot_device); 182 switch (boot_device) { 183 #ifdef CONFIG_SPL_RAM_DEVICE 184 case BOOT_DEVICE_RAM: 185 spl_ram_load_image(); 186 break; 187 #endif 188 #ifdef CONFIG_SPL_MMC_SUPPORT 189 case BOOT_DEVICE_MMC1: 190 case BOOT_DEVICE_MMC2: 191 case BOOT_DEVICE_MMC2_2: 192 spl_mmc_load_image(); 193 break; 194 #endif 195 #ifdef CONFIG_SPL_NAND_SUPPORT 196 case BOOT_DEVICE_NAND: 197 spl_nand_load_image(); 198 break; 199 #endif 200 #ifdef CONFIG_SPL_NOR_SUPPORT 201 case BOOT_DEVICE_NOR: 202 spl_nor_load_image(); 203 break; 204 #endif 205 #ifdef CONFIG_SPL_YMODEM_SUPPORT 206 case BOOT_DEVICE_UART: 207 spl_ymodem_load_image(); 208 break; 209 #endif 210 #ifdef CONFIG_SPL_SPI_SUPPORT 211 case BOOT_DEVICE_SPI: 212 spl_spi_load_image(); 213 break; 214 #endif 215 #ifdef CONFIG_SPL_ETH_SUPPORT 216 case BOOT_DEVICE_CPGMAC: 217 #ifdef CONFIG_SPL_ETH_DEVICE 218 spl_net_load_image(CONFIG_SPL_ETH_DEVICE); 219 #else 220 spl_net_load_image(NULL); 221 #endif 222 break; 223 #endif 224 #ifdef CONFIG_SPL_USBETH_SUPPORT 225 case BOOT_DEVICE_USBETH: 226 spl_net_load_image("usb_ether"); 227 break; 228 #endif 229 default: 230 debug("SPL: Un-supported Boot Device\n"); 231 hang(); 232 } 233 234 switch (spl_image.os) { 235 case IH_OS_U_BOOT: 236 debug("Jumping to U-Boot\n"); 237 break; 238 #ifdef CONFIG_SPL_OS_BOOT 239 case IH_OS_LINUX: 240 debug("Jumping to Linux\n"); 241 spl_board_prepare_for_linux(); 242 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR); 243 #endif 244 default: 245 debug("Unsupported OS image.. Jumping nevertheless..\n"); 246 } 247 jump_to_image_no_args(&spl_image); 248 } 249 250 /* 251 * This requires UART clocks to be enabled. In order for this to work the 252 * caller must ensure that the gd pointer is valid. 253 */ 254 void preloader_console_init(void) 255 { 256 gd->bd = &bdata; 257 gd->baudrate = CONFIG_BAUDRATE; 258 259 serial_init(); /* serial communications setup */ 260 261 gd->have_console = 1; 262 263 puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \ 264 U_BOOT_TIME ")\n"); 265 #ifdef CONFIG_SPL_DISPLAY_PRINT 266 spl_display_print(); 267 #endif 268 } 269