1 /* 2 * (C) Copyright 2002 3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> 4 * Marius Groeger <mgroeger@sysgo.de> 5 * 6 * Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (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, MA 02111-1307 USA 21 * 22 */ 23 24 #include <common.h> 25 #include <command.h> 26 #include <image.h> 27 #include <u-boot/zlib.h> 28 #include <asm/byteorder.h> 29 30 DECLARE_GLOBAL_DATA_PTR; 31 32 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \ 33 defined (CONFIG_CMDLINE_TAG) || \ 34 defined (CONFIG_INITRD_TAG) || \ 35 defined (CONFIG_SERIAL_TAG) || \ 36 defined (CONFIG_REVISION_TAG) 37 static void setup_start_tag (bd_t *bd); 38 39 # ifdef CONFIG_SETUP_MEMORY_TAGS 40 static void setup_memory_tags (bd_t *bd); 41 # endif 42 static void setup_commandline_tag (bd_t *bd, char *commandline); 43 44 # ifdef CONFIG_INITRD_TAG 45 static void setup_initrd_tag (bd_t *bd, ulong initrd_start, 46 ulong initrd_end); 47 # endif 48 static void setup_end_tag (bd_t *bd); 49 50 static struct tag *params; 51 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */ 52 53 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) 54 { 55 bd_t *bd = gd->bd; 56 char *s; 57 int machid = bd->bi_arch_number; 58 void (*theKernel)(int zero, int arch, uint params); 59 60 #ifdef CONFIG_CMDLINE_TAG 61 char *commandline = getenv ("bootargs"); 62 #endif 63 64 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 65 return 1; 66 67 theKernel = (void (*)(int, int, uint))images->ep; 68 69 s = getenv ("machid"); 70 if (s) { 71 machid = simple_strtoul (s, NULL, 16); 72 printf ("Using machid 0x%x from environment\n", machid); 73 } 74 75 show_boot_progress (15); 76 77 debug ("## Transferring control to Linux (at address %08lx) ...\n", 78 (ulong) theKernel); 79 80 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \ 81 defined (CONFIG_CMDLINE_TAG) || \ 82 defined (CONFIG_INITRD_TAG) || \ 83 defined (CONFIG_SERIAL_TAG) || \ 84 defined (CONFIG_REVISION_TAG) 85 setup_start_tag (bd); 86 #ifdef CONFIG_SERIAL_TAG 87 setup_serial_tag (¶ms); 88 #endif 89 #ifdef CONFIG_REVISION_TAG 90 setup_revision_tag (¶ms); 91 #endif 92 #ifdef CONFIG_SETUP_MEMORY_TAGS 93 setup_memory_tags (bd); 94 #endif 95 #ifdef CONFIG_CMDLINE_TAG 96 setup_commandline_tag (bd, commandline); 97 #endif 98 #ifdef CONFIG_INITRD_TAG 99 if (images->rd_start && images->rd_end) 100 setup_initrd_tag (bd, images->rd_start, images->rd_end); 101 #endif 102 setup_end_tag (bd); 103 #endif 104 105 /* we assume that the kernel is in place */ 106 printf ("\nStarting kernel ...\n\n"); 107 108 #ifdef CONFIG_USB_DEVICE 109 { 110 extern void udc_disconnect (void); 111 udc_disconnect (); 112 } 113 #endif 114 115 cleanup_before_linux (); 116 117 theKernel (0, machid, bd->bi_boot_params); 118 /* does not return */ 119 120 return 1; 121 } 122 123 124 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \ 125 defined (CONFIG_CMDLINE_TAG) || \ 126 defined (CONFIG_INITRD_TAG) || \ 127 defined (CONFIG_SERIAL_TAG) || \ 128 defined (CONFIG_REVISION_TAG) 129 static void setup_start_tag (bd_t *bd) 130 { 131 params = (struct tag *) bd->bi_boot_params; 132 133 params->hdr.tag = ATAG_CORE; 134 params->hdr.size = tag_size (tag_core); 135 136 params->u.core.flags = 0; 137 params->u.core.pagesize = 0; 138 params->u.core.rootdev = 0; 139 140 params = tag_next (params); 141 } 142 143 144 #ifdef CONFIG_SETUP_MEMORY_TAGS 145 static void setup_memory_tags (bd_t *bd) 146 { 147 int i; 148 149 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { 150 params->hdr.tag = ATAG_MEM; 151 params->hdr.size = tag_size (tag_mem32); 152 153 params->u.mem.start = bd->bi_dram[i].start; 154 params->u.mem.size = bd->bi_dram[i].size; 155 156 params = tag_next (params); 157 } 158 } 159 #endif /* CONFIG_SETUP_MEMORY_TAGS */ 160 161 162 static void setup_commandline_tag (bd_t *bd, char *commandline) 163 { 164 char *p; 165 166 if (!commandline) 167 return; 168 169 /* eat leading white space */ 170 for (p = commandline; *p == ' '; p++); 171 172 /* skip non-existent command lines so the kernel will still 173 * use its default command line. 174 */ 175 if (*p == '\0') 176 return; 177 178 params->hdr.tag = ATAG_CMDLINE; 179 params->hdr.size = 180 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2; 181 182 strcpy (params->u.cmdline.cmdline, p); 183 184 params = tag_next (params); 185 } 186 187 188 #ifdef CONFIG_INITRD_TAG 189 static void setup_initrd_tag (bd_t *bd, ulong initrd_start, ulong initrd_end) 190 { 191 /* an ATAG_INITRD node tells the kernel where the compressed 192 * ramdisk can be found. ATAG_RDIMG is a better name, actually. 193 */ 194 params->hdr.tag = ATAG_INITRD2; 195 params->hdr.size = tag_size (tag_initrd); 196 197 params->u.initrd.start = initrd_start; 198 params->u.initrd.size = initrd_end - initrd_start; 199 200 params = tag_next (params); 201 } 202 #endif /* CONFIG_INITRD_TAG */ 203 204 #ifdef CONFIG_SERIAL_TAG 205 void setup_serial_tag (struct tag **tmp) 206 { 207 struct tag *params = *tmp; 208 struct tag_serialnr serialnr; 209 void get_board_serial(struct tag_serialnr *serialnr); 210 211 get_board_serial(&serialnr); 212 params->hdr.tag = ATAG_SERIAL; 213 params->hdr.size = tag_size (tag_serialnr); 214 params->u.serialnr.low = serialnr.low; 215 params->u.serialnr.high= serialnr.high; 216 params = tag_next (params); 217 *tmp = params; 218 } 219 #endif 220 221 #ifdef CONFIG_REVISION_TAG 222 void setup_revision_tag(struct tag **in_params) 223 { 224 u32 rev = 0; 225 u32 get_board_rev(void); 226 227 rev = get_board_rev(); 228 params->hdr.tag = ATAG_REVISION; 229 params->hdr.size = tag_size (tag_revision); 230 params->u.revision.rev = rev; 231 params = tag_next (params); 232 } 233 #endif /* CONFIG_REVISION_TAG */ 234 235 236 static void setup_end_tag (bd_t *bd) 237 { 238 params->hdr.tag = ATAG_NONE; 239 params->hdr.size = 0; 240 } 241 242 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */ 243