metadata.c revision 127826
1/*- 2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * from: FreeBSD: src/sys/boot/i386/libi386/bootinfo.c,v 1.29 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: head/sys/boot/sparc64/loader/metadata.c 127826 2004-04-04 05:24:13Z marcel $"); 31 32#include <stand.h> 33#include <sys/param.h> 34#include <sys/reboot.h> 35#include <sys/linker.h> 36 37#include <machine/metadata.h> 38 39#include "bootstrap.h" 40#include "libofw.h" 41 42extern struct tlb_entry *dtlb_store; 43extern struct tlb_entry *itlb_store; 44 45extern int dtlb_slot; 46extern int itlb_slot; 47 48/* 49 * Return a 'boothowto' value corresponding to the kernel arguments in 50 * (kargs) and any relevant environment variables. 51 */ 52static struct 53{ 54 const char *ev; 55 int mask; 56} howto_names[] = { 57 {"boot_askname", RB_ASKNAME}, 58 {"boot_cdrom", RB_CDROM}, 59 {"boot_userconfig", RB_CONFIG}, 60 {"boot_ddb", RB_KDB}, 61 {"boot_gdb", RB_GDB}, 62 {"boot_single", RB_SINGLE}, 63 {"boot_verbose", RB_VERBOSE}, 64 {"boot_multicons", RB_MULTIPLE}, 65 {"boot_serial", RB_SERIAL}, 66 {NULL, 0} 67}; 68 69int 70md_getboothowto(char *kargs) 71{ 72 char buf[32], buf2[32]; 73 phandle_t options; 74 char *cp; 75 int howto; 76 int active; 77 int i; 78 79 /* Parse kargs */ 80 howto = 0; 81 if (kargs != NULL) { 82 cp = kargs; 83 active = 0; 84 while (*cp != 0) { 85 if (!active && (*cp == '-')) { 86 active = 1; 87 } else if (active) 88 switch (*cp) { 89 case 'a': 90 howto |= RB_ASKNAME; 91 break; 92 case 'c': 93 howto |= RB_CONFIG; 94 break; 95 case 'C': 96 howto |= RB_CDROM; 97 break; 98 case 'd': 99 howto |= RB_KDB; 100 break; 101 case 'D': 102 howto |= RB_MULTIPLE; 103 break; 104 case 'm': 105 howto |= RB_MUTE; 106 break; 107 case 'g': 108 howto |= RB_GDB; 109 break; 110 case 'h': 111 howto |= RB_SERIAL; 112 break; 113 case 'r': 114 howto |= RB_DFLTROOT; 115 break; 116 case 's': 117 howto |= RB_SINGLE; 118 break; 119 case 'v': 120 howto |= RB_VERBOSE; 121 break; 122 default: 123 active = 0; 124 break; 125 } 126 cp++; 127 } 128 } 129 /* get equivalents from the environment */ 130 for (i = 0; howto_names[i].ev != NULL; i++) 131 if (getenv(howto_names[i].ev) != NULL) 132 howto |= howto_names[i].mask; 133 options = OF_finddevice("/options"); 134 OF_getprop(options, "input-device", buf, sizeof(buf)); 135 OF_getprop(options, "output-device", buf2, sizeof(buf2)); 136 if (strncmp(buf, "tty", sizeof("tty") - 1) == 0 && strncmp(buf2, "tty", 137 sizeof("tty") - 1) == 0) 138 howto |= RB_SERIAL; 139 else if (strcmp(buf, "keyboard") == 0 && strcmp(buf2, "screen") == 0) { 140 phandle_t chosen; 141 ihandle_t stdin, stdout; 142 143 chosen = OF_finddevice("/chosen"); 144 OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)); 145 OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)); 146 if (OF_instance_to_package(stdin) == OF_instance_to_package(stdout)) 147 howto |= RB_SERIAL; 148 } 149 return(howto); 150} 151 152/* 153 * Copy the environment into the load area starting at (addr). 154 * Each variable is formatted as <name>=<value>, with a single nul 155 * separating each variable, and a double nul terminating the environment. 156 */ 157vm_offset_t 158md_copyenv(vm_offset_t addr) 159{ 160 struct env_var *ep; 161 162 /* traverse the environment */ 163 for (ep = environ; ep != NULL; ep = ep->ev_next) { 164 archsw.arch_copyin(ep->ev_name, addr, strlen(ep->ev_name)); 165 addr += strlen(ep->ev_name); 166 archsw.arch_copyin("=", addr, 1); 167 addr++; 168 if (ep->ev_value != NULL) { 169 archsw.arch_copyin(ep->ev_value, addr, strlen(ep->ev_value)); 170 addr += strlen(ep->ev_value); 171 } 172 archsw.arch_copyin("", addr, 1); 173 addr++; 174 } 175 archsw.arch_copyin("", addr, 1); 176 addr++; 177 return(addr); 178} 179 180/* 181 * Copy module-related data into the load area, where it can be 182 * used as a directory for loaded modules. 183 * 184 * Module data is presented in a self-describing format. Each datum 185 * is preceded by a 32-bit identifier and a 32-bit size field. 186 * 187 * Currently, the following data are saved: 188 * 189 * MOD_NAME (variable) module name (string) 190 * MOD_TYPE (variable) module type (string) 191 * MOD_ARGS (variable) module parameters (string) 192 * MOD_ADDR sizeof(vm_offset_t) module load address 193 * MOD_SIZE sizeof(size_t) module size 194 * MOD_METADATA (variable) type-specific metadata 195 */ 196#define COPY32(v, a, c) { \ 197 u_int32_t x = (v); \ 198 if (c) \ 199 archsw.arch_copyin(&x, a, sizeof(x)); \ 200 a += sizeof(x); \ 201} 202 203#define MOD_STR(t, a, s, c) { \ 204 COPY32(t, a, c); \ 205 COPY32(strlen(s) + 1, a, c) \ 206 if (c) \ 207 archsw.arch_copyin(s, a, strlen(s) + 1);\ 208 a += roundup(strlen(s) + 1, sizeof(u_long));\ 209} 210 211#define MOD_NAME(a, s, c) MOD_STR(MODINFO_NAME, a, s, c) 212#define MOD_TYPE(a, s, c) MOD_STR(MODINFO_TYPE, a, s, c) 213#define MOD_ARGS(a, s, c) MOD_STR(MODINFO_ARGS, a, s, c) 214 215#define MOD_VAR(t, a, s, c) { \ 216 COPY32(t, a, c); \ 217 COPY32(sizeof(s), a, c); \ 218 if (c) \ 219 archsw.arch_copyin(&s, a, sizeof(s)); \ 220 a += roundup(sizeof(s), sizeof(u_long)); \ 221} 222 223#define MOD_ADDR(a, s, c) MOD_VAR(MODINFO_ADDR, a, s, c) 224#define MOD_SIZE(a, s, c) MOD_VAR(MODINFO_SIZE, a, s, c) 225 226#define MOD_METADATA(a, mm, c) { \ 227 COPY32(MODINFO_METADATA | mm->md_type, a, c);\ 228 COPY32(mm->md_size, a, c); \ 229 if (c) \ 230 archsw.arch_copyin(mm->md_data, a, mm->md_size);\ 231 a += roundup(mm->md_size, sizeof(u_long)); \ 232} 233 234#define MOD_END(a, c) { \ 235 COPY32(MODINFO_END, a, c); \ 236 COPY32(0, a, c); \ 237} 238 239vm_offset_t 240md_copymodules(vm_offset_t addr) 241{ 242 struct preloaded_file *fp; 243 struct file_metadata *md; 244 int c; 245 246 c = addr != 0; 247 /* start with the first module on the list, should be the kernel */ 248 for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) { 249 250 MOD_NAME(addr, fp->f_name, c); /* this field must come first */ 251 MOD_TYPE(addr, fp->f_type, c); 252 if (fp->f_args) 253 MOD_ARGS(addr, fp->f_args, c); 254 MOD_ADDR(addr, fp->f_addr, c); 255 MOD_SIZE(addr, fp->f_size, c); 256 for (md = fp->f_metadata; md != NULL; md = md->md_next) { 257 if (!(md->md_type & MODINFOMD_NOCOPY)) { 258 MOD_METADATA(addr, md, c); 259 } 260 } 261 } 262 MOD_END(addr, c); 263 return(addr); 264} 265 266/* 267 * Load the information expected by a sparc64 kernel. 268 * 269 * - The 'boothowto' argument is constructed 270 * - The 'bootdev' argument is constructed 271 * - The kernel environment is copied into kernel space. 272 * - Module metadata are formatted and placed in kernel space. 273 */ 274int 275md_load(char *args, vm_offset_t *modulep) 276{ 277 struct preloaded_file *kfp; 278 struct preloaded_file *xp; 279 struct file_metadata *md; 280 vm_offset_t kernend; 281 vm_offset_t addr; 282 vm_offset_t envp; 283 vm_offset_t size; 284 char *rootdevname; 285 int howto; 286 287 howto = md_getboothowto(args); 288 289 /* 290 * Allow the environment variable 'rootdev' to override the supplied device 291 * This should perhaps go to MI code and/or have $rootdev tested/set by 292 * MI code before launching the kernel. 293 */ 294 if ((rootdevname = getenv("rootdev")) == NULL) 295 rootdevname = getenv("currdev"); 296 getrootmount(rootdevname); 297 298 /* find the last module in the chain */ 299 addr = 0; 300 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) { 301 if (addr < (xp->f_addr + xp->f_size)) 302 addr = xp->f_addr + xp->f_size; 303 } 304 /* pad to a page boundary */ 305 addr = roundup(addr, PAGE_SIZE); 306 307 /* copy our environment */ 308 envp = addr; 309 addr = md_copyenv(addr); 310 311 /* pad to a page boundary */ 312 addr = roundup(addr, PAGE_SIZE); 313 314 kernend = 0; 315 kfp = file_findfile(NULL, "elf64 kernel"); 316 if (kfp == NULL) 317 kfp = file_findfile(NULL, "elf kernel"); 318 if (kfp == NULL) 319 panic("can't find kernel file"); 320 file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto); 321 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp); 322 file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend); 323 file_addmetadata(kfp, MODINFOMD_DTLB_SLOTS, sizeof dtlb_slot, &dtlb_slot); 324 file_addmetadata(kfp, MODINFOMD_ITLB_SLOTS, sizeof itlb_slot, &itlb_slot); 325 file_addmetadata(kfp, MODINFOMD_DTLB, 326 dtlb_slot * sizeof(*dtlb_store), dtlb_store); 327 file_addmetadata(kfp, MODINFOMD_ITLB, 328 itlb_slot * sizeof(*itlb_store), itlb_store); 329 330 *modulep = addr; 331 size = md_copymodules(0); 332 kernend = roundup(addr + size, PAGE_SIZE); 333 334 md = file_findmetadata(kfp, MODINFOMD_KERNEND); 335 bcopy(&kernend, md->md_data, sizeof kernend); 336 337 (void)md_copymodules(addr); 338 339 return(0); 340} 341