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root/bsp/boot/common/load.c/* [<][>][^][v][top][bottom][index][help] */DEFINITIONSThis source file includes following definitions.1 /*- 2 * Copyright (c) 2005-2009, Kohsuke Ohtani 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the author nor the names of any co-contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 /* 31 * load.c - Load OS modules 32 */ 33 34 #include <boot.h> 35 #include <load.h> 36 #include <sys/ar.h> 37 #include <sys/bootinfo.h> 38 39 /* forward declarations */ 40 static int load_module(struct ar_hdr *, struct module *); 41 static void setup_bootdisk(struct ar_hdr *); 42 43 paddr_t load_base; /* current load address */ 44 paddr_t load_start; /* start address for loading */ 45 int nr_img; /* number of module images */ 46 47 48 /* 49 * Load OS images - kernel, driver and boot tasks. 50 * 51 * It reads each module file image and copy it to the appropriate 52 * memory area. The image is built as generic an archive (.a) file. 53 * 54 * The image information is stored into the boot information area. 55 */ 56 void 57 load_os(void) 58 { 59 char *hdr; 60 struct bootinfo *bi = bootinfo; 61 struct module *m; 62 char *magic; 63 int i; 64 long len; 65 66 /* 67 * Initialize our data. 68 */ 69 load_base = 0; 70 load_start = 0; 71 nr_img = 0; 72 73 /* 74 * Sanity check of archive image. 75 */ 76 magic = (char *)kvtop(CONFIG_BOOTIMG_BASE); 77 if (strncmp(magic, ARMAG, 8)) 78 panic("Invalid OS image"); 79 80 /* 81 * Load kernel module. 82 */ 83 hdr = (char *)((paddr_t)magic + 8); 84 if (load_module((struct ar_hdr *)hdr, &bi->kernel)) 85 panic("Can not load kernel"); 86 87 /* 88 * Load driver module. 89 */ 90 len = atol((char *)&((struct ar_hdr *)hdr)->ar_size); 91 len += len % 2; /* even alignment */ 92 if (len == 0) 93 panic("Invalid driver image"); 94 hdr = (char *)((paddr_t)hdr + sizeof(struct ar_hdr) + len); 95 if (load_module((struct ar_hdr *)hdr, &bi->driver)) 96 panic("Can not load driver"); 97 98 /* 99 * Load boot tasks. 100 */ 101 i = 0; 102 m = (struct module *)&bi->tasks[0]; 103 while (1) { 104 /* Proceed to next archive header */ 105 len = atol((char *)&((struct ar_hdr *)hdr)->ar_size); 106 len += len % 2; /* even alignment */ 107 if (len == 0) 108 break; 109 hdr = (char *)((paddr_t)hdr + sizeof(struct ar_hdr) + len); 110 111 /* Check archive header */ 112 if (strncmp((char *)&((struct ar_hdr *)hdr)->ar_fmag, 113 ARFMAG, 2)) 114 break; 115 116 /* Load boot disk image */ 117 if (!strncmp((char *)&((struct ar_hdr *)hdr)->ar_name, 118 "bootdisk.a", 10)) { 119 setup_bootdisk((struct ar_hdr *)hdr); 120 continue; 121 } 122 123 /* Load task */ 124 if (load_module((struct ar_hdr *)hdr, m)) 125 break; 126 i++; 127 m++; 128 } 129 130 bi->nr_tasks = i; 131 132 if (bi->nr_tasks == 0) 133 panic("No boot task found!"); 134 135 /* 136 * Reserve single memory block for all boot modules. 137 * This includes kernel, driver, and boot tasks. 138 */ 139 i = bi->nr_rams; 140 bi->ram[i].base = load_start; 141 bi->ram[i].size = (size_t)(load_base - load_start); 142 bi->ram[i].type = MT_RESERVED; 143 bi->nr_rams++; 144 } 145 146 /* 147 * Load module. 148 * Return 0 on success, -1 on failure. 149 */ 150 static int 151 load_module(struct ar_hdr *hdr, struct module *m) 152 { 153 char *c; 154 155 if (strncmp((char *)&hdr->ar_fmag, ARFMAG, 2)) { 156 DPRINTF(("Invalid image %s\n", hdr->ar_name)); 157 return -1; 158 } 159 strlcpy(m->name, hdr->ar_name, sizeof(m->name)); 160 c = m->name; 161 while (*c != '/' && *c != ' ') 162 c++; 163 *c = '\0'; 164 165 DPRINTF(("loading: hdr=%lx module=%lx name=%s\n", 166 (paddr_t)hdr, (paddr_t)m, m->name)); 167 168 if (load_elf((char *)hdr + sizeof(struct ar_hdr), m)) 169 panic("Load error"); 170 171 return 0; 172 } 173 174 /* 175 * Setup boot disk 176 */ 177 static void 178 setup_bootdisk(struct ar_hdr *hdr) 179 { 180 struct bootinfo *bi = bootinfo; 181 paddr_t base; 182 size_t size; 183 184 /* 185 * Store image information. 186 */ 187 if (strncmp((char *)&hdr->ar_fmag, ARFMAG, 2)) { 188 DPRINTF(("Invalid bootdisk image\n")); 189 return; 190 } 191 size = (size_t)atol((char *)&hdr->ar_size); 192 size += size % 2; /* even alignment */ 193 if (size == 0) { 194 DPRINTF(("Size of bootdisk is zero\n")); 195 return; 196 } 197 base = (paddr_t)hdr + sizeof(struct ar_hdr); 198 bi->bootdisk.base = base; 199 bi->bootdisk.size = size; 200 201 #if !defined(CONFIG_ROMBOOT) 202 /* 203 * Reserve memory for boot disk if the image 204 * was copied to RAM. 205 */ 206 bi->ram[bi->nr_rams].base = base; 207 bi->ram[bi->nr_rams].size = size; 208 bi->ram[bi->nr_rams].type = MT_BOOTDISK; 209 bi->nr_rams++; 210 #endif 211 DPRINTF(("bootdisk base=%lx size=%lx\n", 212 bi->bootdisk.base, bi->bootdisk.size)); 213 } /* [<][>][^][v][top][bottom][index][help] */ | |||
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Copyright© 2005-2009 Kohsuke Ohtani |
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