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 u32 *boot_params_ptr = NULL; 39 struct spl_image_info spl_image; 40 41 /* Define global data structure pointer to it*/ 42 static gd_t gdata __attribute__ ((section(".data"))); 43 static bd_t bdata __attribute__ ((section(".data"))); 44 45 inline void hang(void) 46 { 47 puts("### ERROR ### Please RESET the board ###\n"); 48 for (;;) 49 ; 50 } 51 52 void board_init_f(ulong dummy) 53 { 54 /* 55 * We call relocate_code() with relocation target same as the 56 * CONFIG_SYS_SPL_TEXT_BASE. This will result in relocation getting 57 * skipped. Instead, only .bss initialization will happen. That's 58 * all we need 59 */ 60 debug(">>board_init_f()\n"); 61 relocate_code(CONFIG_SPL_STACK, &gdata, CONFIG_SPL_TEXT_BASE); 62 } 63 64 /* 65 * Default function to determine if u-boot or the OS should 66 * be started. This implementation always returns 1. 67 * 68 * Please implement your own board specific funcion to do this. 69 * 70 * RETURN 71 * 0 to not start u-boot 72 * positive if u-boot should start 73 */ 74 #ifdef CONFIG_SPL_OS_BOOT 75 __weak int spl_start_uboot(void) 76 { 77 puts("SPL: Please implement spl_start_uboot() for your board\n"); 78 puts("SPL: Direct Linux boot not active!\n"); 79 return 1; 80 } 81 #endif 82 83 void spl_parse_image_header(const struct image_header *header) 84 { 85 u32 header_size = sizeof(struct image_header); 86 87 if (__be32_to_cpu(header->ih_magic) == IH_MAGIC) { 88 spl_image.size = __be32_to_cpu(header->ih_size) + header_size; 89 spl_image.entry_point = __be32_to_cpu(header->ih_load); 90 /* Load including the header */ 91 spl_image.load_addr = spl_image.entry_point - header_size; 92 spl_image.os = header->ih_os; 93 spl_image.name = (const char *)&header->ih_name; 94 debug("spl: payload image: %s load addr: 0x%x size: %d\n", 95 spl_image.name, spl_image.load_addr, spl_image.size); 96 } else { 97 /* Signature not found - assume u-boot.bin */ 98 puts("mkimage signature not found, assuming u-boot.bin ..\n"); 99 debug("mkimage signature not found - ih_magic = %x\n", 100 header->ih_magic); 101 /* Let's assume U-Boot will not be more than 200 KB */ 102 spl_image.size = 200 * 1024; 103 spl_image.entry_point = CONFIG_SYS_TEXT_BASE; 104 spl_image.load_addr = CONFIG_SYS_TEXT_BASE; 105 spl_image.os = IH_OS_U_BOOT; 106 spl_image.name = "U-Boot"; 107 } 108 } 109 110 /* 111 * This function jumps to an image with argument. Normally an FDT or ATAGS 112 * image. 113 * arg: Pointer to paramter image in RAM 114 */ 115 #ifdef CONFIG_SPL_OS_BOOT 116 static void __noreturn jump_to_image_linux(void *arg) 117 { 118 debug("Entering kernel arg pointer: 0x%p\n", arg); 119 typedef void (*image_entry_arg_t)(int, int, void *) 120 __attribute__ ((noreturn)); 121 image_entry_arg_t image_entry = 122 (image_entry_arg_t) spl_image.entry_point; 123 cleanup_before_linux(); 124 image_entry(0, CONFIG_MACH_TYPE, arg); 125 } 126 #endif 127 128 static void __noreturn jump_to_image_no_args(void) 129 { 130 typedef void __noreturn (*image_entry_noargs_t)(u32 *); 131 image_entry_noargs_t image_entry = 132 (image_entry_noargs_t) spl_image.entry_point; 133 134 debug("image entry point: 0x%X\n", spl_image.entry_point); 135 /* Pass the saved boot_params from rom code */ 136 #if defined(CONFIG_VIRTIO) || defined(CONFIG_ZEBU) 137 image_entry = (image_entry_noargs_t)0x80100000; 138 #endif 139 u32 boot_params_ptr_addr = (u32)&boot_params_ptr; 140 image_entry((u32 *)boot_params_ptr_addr); 141 } 142 143 void board_init_r(gd_t *id, ulong dummy) 144 { 145 u32 boot_device; 146 debug(">>spl:board_init_r()\n"); 147 148 #ifdef CONFIG_SYS_SPL_MALLOC_START 149 mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START, 150 CONFIG_SYS_SPL_MALLOC_SIZE); 151 #endif 152 153 #ifdef CONFIG_SPL_BOARD_INIT 154 spl_board_init(); 155 #endif 156 157 boot_device = spl_boot_device(); 158 debug("boot device - %d\n", boot_device); 159 switch (boot_device) { 160 #ifdef CONFIG_SPL_MMC_SUPPORT 161 case BOOT_DEVICE_MMC1: 162 case BOOT_DEVICE_MMC2: 163 case BOOT_DEVICE_MMC2_2: 164 spl_mmc_load_image(); 165 break; 166 #endif 167 #ifdef CONFIG_SPL_NAND_SUPPORT 168 case BOOT_DEVICE_NAND: 169 spl_nand_load_image(); 170 break; 171 #endif 172 #ifdef CONFIG_SPL_YMODEM_SUPPORT 173 case BOOT_DEVICE_UART: 174 spl_ymodem_load_image(); 175 break; 176 #endif 177 #ifdef CONFIG_SPL_SPI_SUPPORT 178 case BOOT_DEVICE_SPI: 179 spi_boot(); 180 break; 181 #endif 182 default: 183 puts("SPL: Un-supported Boot Device\n"); 184 debug("Found: %d\n", boot_device); 185 hang(); 186 break; 187 } 188 189 switch (spl_image.os) { 190 case IH_OS_U_BOOT: 191 debug("Jumping to U-Boot\n"); 192 jump_to_image_no_args(); 193 break; 194 #ifdef CONFIG_SPL_OS_BOOT 195 case IH_OS_LINUX: 196 debug("Jumping to Linux\n"); 197 spl_board_prepare_for_linux(); 198 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR); 199 break; 200 #endif 201 default: 202 puts("Unsupported OS image.. Jumping nevertheless..\n"); 203 jump_to_image_no_args(); 204 } 205 } 206 207 /* This requires UART clocks to be enabled */ 208 void preloader_console_init(void) 209 { 210 gd = &gdata; 211 gd->bd = &bdata; 212 gd->flags |= GD_FLG_RELOC; 213 gd->baudrate = CONFIG_BAUDRATE; 214 215 serial_init(); /* serial communications setup */ 216 217 gd->have_console = 1; 218 219 puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \ 220 U_BOOT_TIME ")\n"); 221 #ifdef CONFIG_SPL_DISPLAY_PRINT 222 spl_display_print(); 223 #endif 224 } 225