wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2002 |
Graeme Russ | 45fc1d8 | 2011-04-13 19:43:26 +1000 | [diff] [blame] | 3 | * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se> |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 4 | * |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 5 | * See file CREDITS for list of people who contributed to this |
| 6 | * project. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as |
| 10 | * published by the Free Software Foundation; either version 2 of |
| 11 | * the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 21 | * MA 02111-1307 USA |
| 22 | */ |
| 23 | |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 24 | /* |
Graeme Russ | 45fc1d8 | 2011-04-13 19:43:26 +1000 | [diff] [blame] | 25 | * Linux x86 zImage and bzImage loading |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 26 | * |
| 27 | * based on the procdure described in |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 28 | * linux/Documentation/i386/boot.txt |
| 29 | */ |
| 30 | |
| 31 | #include <common.h> |
| 32 | #include <asm/io.h> |
| 33 | #include <asm/ptrace.h> |
| 34 | #include <asm/zimage.h> |
| 35 | #include <asm/realmode.h> |
| 36 | #include <asm/byteorder.h> |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 37 | #include <asm/bootparam.h> |
| 38 | #include <asm/ic/sc520.h> |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 39 | |
| 40 | /* |
| 41 | * Memory lay-out: |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 42 | * |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 43 | * relative to setup_base (which is 0x90000 currently) |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 44 | * |
| 45 | * 0x0000-0x7FFF Real mode kernel |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 46 | * 0x8000-0x8FFF Stack and heap |
| 47 | * 0x9000-0x90FF Kernel command line |
| 48 | */ |
| 49 | #define DEFAULT_SETUP_BASE 0x90000 |
| 50 | #define COMMAND_LINE_OFFSET 0x9000 |
| 51 | #define HEAP_END_OFFSET 0x8e00 |
| 52 | |
| 53 | #define COMMAND_LINE_SIZE 2048 |
| 54 | |
| 55 | static void build_command_line(char *command_line, int auto_boot) |
| 56 | { |
| 57 | char *env_command_line; |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 58 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 59 | command_line[0] = '\0'; |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 60 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 61 | env_command_line = getenv("bootargs"); |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 62 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 63 | /* set console= argument if we use a serial console */ |
| 64 | if (NULL == strstr(env_command_line, "console=")) { |
| 65 | if (0==strcmp(getenv("stdout"), "serial")) { |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 66 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 67 | /* We seem to use serial console */ |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 68 | sprintf(command_line, "console=ttyS0,%s ", |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 69 | getenv("baudrate")); |
| 70 | } |
| 71 | } |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 72 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 73 | if (auto_boot) { |
| 74 | strcat(command_line, "auto "); |
| 75 | } |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 76 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 77 | if (NULL != env_command_line) { |
| 78 | strcat(command_line, env_command_line); |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 82 | printf("Kernel command line: \"%s\"\n", command_line); |
| 83 | } |
| 84 | |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 85 | void *load_zimage(char *image, unsigned long kernel_size, |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 86 | unsigned long initrd_addr, unsigned long initrd_size, |
| 87 | int auto_boot) |
| 88 | { |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 89 | void *setup_base; |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 90 | int setup_size; |
| 91 | int bootproto; |
| 92 | int big_image; |
| 93 | void *load_address; |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 94 | |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 95 | struct setup_header *hdr = (struct setup_header *)(image + SETUP_SECTS_OFF); |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 96 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 97 | setup_base = (void*)DEFAULT_SETUP_BASE; /* base address for real-mode segment */ |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 98 | |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 99 | if (KERNEL_MAGIC != hdr->boot_flag) { |
| 100 | printf("Error: Invalid Boot Flag (found 0x%04x, expected 0x%04x)\n", |
| 101 | hdr->boot_flag, KERNEL_MAGIC); |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 102 | return 0; |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 103 | } else { |
| 104 | printf("Valid Boot Flag\n"); |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 105 | } |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 106 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 107 | /* determine boot protocol version */ |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 108 | if (KERNEL_V2_MAGIC == hdr->header) { |
| 109 | printf("Magic signature found\n"); |
| 110 | |
| 111 | bootproto = hdr->version; |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 112 | } else { |
| 113 | /* Very old kernel */ |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 114 | printf("Magic signature not found\n"); |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 115 | bootproto = 0x0100; |
| 116 | } |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 117 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 118 | /* determine size of setup */ |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 119 | if (0 == hdr->setup_sects) { |
| 120 | printf("Setup Sectors = 0 (defaulting to 4)\n"); |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 121 | setup_size = 5 * 512; |
| 122 | } else { |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 123 | setup_size = (hdr->setup_sects + 1) * 512; |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 124 | } |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 125 | |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 126 | printf("Setup Size = 0x%8.8lx\n", (ulong)setup_size); |
| 127 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 128 | if (setup_size > SETUP_MAX_SIZE) { |
| 129 | printf("Error: Setup is too large (%d bytes)\n", setup_size); |
| 130 | } |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 131 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 132 | /* Determine image type */ |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 133 | big_image = (bootproto >= 0x0200) && (hdr->loadflags & BIG_KERNEL_FLAG); |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 134 | |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 135 | /* Determine load address */ |
| 136 | load_address = (void*)(big_image ? BZIMAGE_LOAD_ADDR : ZIMAGE_LOAD_ADDR); |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 137 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 138 | /* load setup */ |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 139 | printf("Moving Real-Mode Code to 0x%8.8lx (%d bytes)\n", (ulong)setup_base, setup_size); |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 140 | memmove(setup_base, image, setup_size); |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 141 | |
| 142 | printf("Using boot protocol version %x.%02x\n", |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 143 | (bootproto & 0xff00) >> 8, bootproto & 0xff); |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 144 | |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 145 | if (bootproto == 0x0100) { |
| 146 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 147 | *(u16*)(setup_base + CMD_LINE_MAGIC_OFF) = COMMAND_LINE_MAGIC; |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 148 | *(u16*)(setup_base + CMD_LINE_OFFSET_OFF) = COMMAND_LINE_OFFSET; |
| 149 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 150 | /* A very old kernel MUST have its real-mode code |
| 151 | * loaded at 0x90000 */ |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 152 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 153 | if ((u32)setup_base != 0x90000) { |
| 154 | /* Copy the real-mode kernel */ |
| 155 | memmove((void*)0x90000, setup_base, setup_size); |
| 156 | /* Copy the command line */ |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 157 | memmove((void*)0x99000, setup_base+COMMAND_LINE_OFFSET, |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 158 | COMMAND_LINE_SIZE); |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 159 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 160 | setup_base = (void*)0x90000; /* Relocated */ |
| 161 | } |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 162 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 163 | /* It is recommended to clear memory up to the 32K mark */ |
| 164 | memset((void*)0x90000 + setup_size, 0, SETUP_MAX_SIZE-setup_size); |
| 165 | } |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 166 | |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 167 | /* We are now setting up the real-mode version of the header */ |
| 168 | hdr = (struct setup_header *)(setup_base + SETUP_SECTS_OFF); |
| 169 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 170 | if (bootproto >= 0x0200) { |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 171 | hdr->type_of_loader = 8; |
| 172 | |
| 173 | if (hdr->setup_sects >= 15) |
| 174 | printf("Linux kernel version %s\n", (char *) |
| 175 | (setup_base + (hdr->kernel_version + 0x200))); |
| 176 | else |
| 177 | printf("Setup Sectors < 15 - Cannot print kernel version.\n"); |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 178 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 179 | if (initrd_addr) { |
| 180 | printf("Initial RAM disk at linear address 0x%08lx, size %ld bytes\n", |
| 181 | initrd_addr, initrd_size); |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 182 | |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 183 | hdr->ramdisk_image = initrd_addr; |
| 184 | hdr->ramdisk_size = initrd_size; |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 185 | } |
| 186 | } |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 187 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 188 | if (bootproto >= 0x0201) { |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 189 | hdr->heap_end_ptr = HEAP_END_OFFSET; |
| 190 | hdr->loadflags |= HEAP_FLAG; |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 191 | } |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 192 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 193 | if (bootproto >= 0x0202) { |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 194 | hdr->cmd_line_ptr = (u32)setup_base + COMMAND_LINE_OFFSET; |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 195 | } else if (bootproto >= 0x0200) { |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 196 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 197 | *(u16*)(setup_base + CMD_LINE_MAGIC_OFF) = COMMAND_LINE_MAGIC; |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 198 | *(u16*)(setup_base + CMD_LINE_OFFSET_OFF) = COMMAND_LINE_OFFSET; |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 199 | |
| 200 | hdr->setup_move_size = 0x9100; |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 201 | } |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 202 | |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 203 | if (bootproto >= 0x0204) |
| 204 | kernel_size = hdr->syssize * 16; |
| 205 | else |
| 206 | kernel_size -= setup_size; |
| 207 | |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 208 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 209 | if (big_image) { |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 210 | if ((kernel_size) > BZIMAGE_MAX_SIZE) { |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 211 | printf("Error: bzImage kernel too big! (size: %ld, max: %d)\n", |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 212 | kernel_size, BZIMAGE_MAX_SIZE); |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 213 | return 0; |
| 214 | } |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 215 | |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 216 | } else if ((kernel_size) > ZIMAGE_MAX_SIZE) { |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 217 | printf("Error: zImage kernel too big! (size: %ld, max: %d)\n", |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 218 | kernel_size, ZIMAGE_MAX_SIZE); |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 219 | return 0; |
| 220 | } |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 221 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 222 | /* build command line at COMMAND_LINE_OFFSET */ |
| 223 | build_command_line(setup_base + COMMAND_LINE_OFFSET, auto_boot); |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 224 | |
| 225 | printf("Loading %czImage at address 0x%08x (%ld bytes)\n", big_image ? 'b' : ' ', |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 226 | (u32)load_address, kernel_size); |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 227 | |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 228 | |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 229 | memmove(load_address, image + setup_size, kernel_size); |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 230 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 231 | /* ready for booting */ |
| 232 | return setup_base; |
| 233 | } |
| 234 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 235 | void boot_zimage(void *setup_base) |
| 236 | { |
| 237 | struct pt_regs regs; |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 238 | |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 239 | memset(®s, 0, sizeof(struct pt_regs)); |
| 240 | regs.xds = (u32)setup_base >> 4; |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 241 | regs.xes = regs.xds; |
| 242 | regs.xss = regs.xds; |
wdenk | abda5ca | 2003-05-31 18:35:21 +0000 | [diff] [blame] | 243 | regs.esp = 0x9000; |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 244 | regs.eflags = 0; |
| 245 | enter_realmode(((u32)setup_base+SETUP_START_OFFSET)>>4, 0, ®s, ®s); |
| 246 | } |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 247 | |
Wolfgang Denk | 6262d021 | 2010-06-28 22:00:46 +0200 | [diff] [blame] | 248 | int do_zboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 249 | { |
| 250 | void *base_ptr; |
Graeme Russ | 3134be2 | 2010-10-07 20:03:19 +1100 | [diff] [blame] | 251 | void *bzImage_addr = NULL; |
| 252 | char *s; |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 253 | ulong bzImage_size = 0; |
| 254 | |
| 255 | disable_interrupts(); |
| 256 | |
| 257 | /* Setup board for maximum PC/AT Compatibility */ |
| 258 | setup_pcat_compatibility(); |
| 259 | |
Graeme Russ | 3134be2 | 2010-10-07 20:03:19 +1100 | [diff] [blame] | 260 | if (argc >= 2) |
| 261 | /* argv[1] holds the address of the bzImage */ |
| 262 | s = argv[1]; |
| 263 | else |
| 264 | s = getenv("fileaddr"); |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 265 | |
Graeme Russ | 3134be2 | 2010-10-07 20:03:19 +1100 | [diff] [blame] | 266 | if (s) |
| 267 | bzImage_addr = (void *)simple_strtoul(s, NULL, 16); |
| 268 | |
| 269 | if (argc >= 3) |
| 270 | /* argv[2] holds the size of the bzImage */ |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 271 | bzImage_size = simple_strtoul(argv[2], NULL, 16); |
| 272 | |
| 273 | /* Lets look for*/ |
| 274 | base_ptr = load_zimage (bzImage_addr, bzImage_size, 0, 0, 0); |
| 275 | |
| 276 | if (NULL == base_ptr) { |
| 277 | printf ("## Kernel loading failed ...\n"); |
| 278 | } else { |
| 279 | printf ("## Transferring control to Linux (at address %08x) ...\n", |
| 280 | (u32)base_ptr); |
| 281 | |
| 282 | /* we assume that the kernel is in place */ |
| 283 | printf("\nStarting kernel ...\n\n"); |
| 284 | |
| 285 | boot_zimage(base_ptr); |
| 286 | /* does not return */ |
| 287 | } |
| 288 | |
| 289 | return -1; |
| 290 | } |
| 291 | |
| 292 | U_BOOT_CMD( |
Graeme Russ | 3134be2 | 2010-10-07 20:03:19 +1100 | [diff] [blame] | 293 | zboot, 2, 0, do_zboot, |
Graeme Russ | 1bab104 | 2010-04-24 00:05:49 +1000 | [diff] [blame] | 294 | "Boot bzImage", |
| 295 | "" |
| 296 | ); |