metadata.c revision 149111
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 149111 2005-08-15 20:58:36Z marius $"); 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 48static int md_bootserial(void); 49 50/* 51 * Return a 'boothowto' value corresponding to the kernel arguments in 52 * (kargs) and any relevant environment variables. 53 */ 54static struct 55{ 56 const char *ev; 57 int mask; 58} howto_names[] = { 59 {"boot_askname", RB_ASKNAME}, 60 {"boot_cdrom", RB_CDROM}, 61 {"boot_ddb", RB_KDB}, 62 {"boot_gdb", RB_GDB}, 63 {"boot_single", RB_SINGLE}, 64 {"boot_verbose", RB_VERBOSE}, 65 {"boot_multicons", RB_MULTIPLE}, 66 {"boot_serial", RB_SERIAL}, 67 {NULL, 0} 68}; 69 70int 71md_getboothowto(char *kargs) 72{ 73 char *cp; 74 int howto; 75 int active; 76 int i; 77 78 /* Parse kargs */ 79 howto = 0; 80 if (kargs != NULL) { 81 cp = kargs; 82 active = 0; 83 while (*cp != 0) { 84 if (!active && (*cp == '-')) { 85 active = 1; 86 } else if (active) 87 switch (*cp) { 88 case 'a': 89 howto |= RB_ASKNAME; 90 break; 91 case 'C': 92 howto |= RB_CDROM; 93 break; 94 case 'd': 95 howto |= RB_KDB; 96 break; 97 case 'D': 98 howto |= RB_MULTIPLE; 99 break; 100 case 'm': 101 howto |= RB_MUTE; 102 break; 103 case 'g': 104 howto |= RB_GDB; 105 break; 106 case 'h': 107 howto |= RB_SERIAL; 108 break; 109 case 'r': 110 howto |= RB_DFLTROOT; 111 break; 112 case 's': 113 howto |= RB_SINGLE; 114 break; 115 case 'v': 116 howto |= RB_VERBOSE; 117 break; 118 default: 119 active = 0; 120 break; 121 } 122 cp++; 123 } 124 } 125 /* get equivalents from the environment */ 126 for (i = 0; howto_names[i].ev != NULL; i++) 127 if (getenv(howto_names[i].ev) != NULL) 128 howto |= howto_names[i].mask; 129 if (md_bootserial() != -1) 130 howto |= RB_SERIAL; 131 return(howto); 132} 133 134static int 135md_bootserial(void) 136{ 137 char buf[64]; 138 ihandle_t inst; 139 phandle_t input; 140 phandle_t node; 141 phandle_t output; 142 143 if ((node = OF_finddevice("/options")) == -1) 144 return(-1); 145 if (OF_getprop(node, "input-device", buf, sizeof(buf)) == -1) 146 return(-1); 147 input = OF_finddevice(buf); 148 if (OF_getprop(node, "output-device", buf, sizeof(buf)) == -1) 149 return(-1); 150 output = OF_finddevice(buf); 151 if (input == -1 || output == -1 || OF_getproplen(input, "keyboard") >= 0) { 152 if ((node = OF_finddevice("/chosen")) == -1) 153 return(-1); 154 if (OF_getprop(node, "stdin", &inst, sizeof(inst)) == -1) 155 return(-1); 156 if ((input = OF_instance_to_package(inst)) == -1) 157 return(-1); 158 if (OF_getprop(node, "stdout", &inst, sizeof(inst)) == -1) 159 return(-1); 160 if ((output = OF_instance_to_package(inst)) == -1) 161 return(-1); 162 } 163 if (input != output) 164 return(-1); 165 if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1) 166 return(-1); 167 if (strcmp(buf, "serial") != 0) 168 return(-1); 169 return(0); 170} 171 172/* 173 * Copy the environment into the load area starting at (addr). 174 * Each variable is formatted as <name>=<value>, with a single nul 175 * separating each variable, and a double nul terminating the environment. 176 */ 177vm_offset_t 178md_copyenv(vm_offset_t addr) 179{ 180 struct env_var *ep; 181 182 /* traverse the environment */ 183 for (ep = environ; ep != NULL; ep = ep->ev_next) { 184 archsw.arch_copyin(ep->ev_name, addr, strlen(ep->ev_name)); 185 addr += strlen(ep->ev_name); 186 archsw.arch_copyin("=", addr, 1); 187 addr++; 188 if (ep->ev_value != NULL) { 189 archsw.arch_copyin(ep->ev_value, addr, strlen(ep->ev_value)); 190 addr += strlen(ep->ev_value); 191 } 192 archsw.arch_copyin("", addr, 1); 193 addr++; 194 } 195 archsw.arch_copyin("", addr, 1); 196 addr++; 197 return(addr); 198} 199 200/* 201 * Copy module-related data into the load area, where it can be 202 * used as a directory for loaded modules. 203 * 204 * Module data is presented in a self-describing format. Each datum 205 * is preceded by a 32-bit identifier and a 32-bit size field. 206 * 207 * Currently, the following data are saved: 208 * 209 * MOD_NAME (variable) module name (string) 210 * MOD_TYPE (variable) module type (string) 211 * MOD_ARGS (variable) module parameters (string) 212 * MOD_ADDR sizeof(vm_offset_t) module load address 213 * MOD_SIZE sizeof(size_t) module size 214 * MOD_METADATA (variable) type-specific metadata 215 */ 216#define COPY32(v, a, c) { \ 217 u_int32_t x = (v); \ 218 if (c) \ 219 archsw.arch_copyin(&x, a, sizeof(x)); \ 220 a += sizeof(x); \ 221} 222 223#define MOD_STR(t, a, s, c) { \ 224 COPY32(t, a, c); \ 225 COPY32(strlen(s) + 1, a, c) \ 226 if (c) \ 227 archsw.arch_copyin(s, a, strlen(s) + 1);\ 228 a += roundup(strlen(s) + 1, sizeof(u_long));\ 229} 230 231#define MOD_NAME(a, s, c) MOD_STR(MODINFO_NAME, a, s, c) 232#define MOD_TYPE(a, s, c) MOD_STR(MODINFO_TYPE, a, s, c) 233#define MOD_ARGS(a, s, c) MOD_STR(MODINFO_ARGS, a, s, c) 234 235#define MOD_VAR(t, a, s, c) { \ 236 COPY32(t, a, c); \ 237 COPY32(sizeof(s), a, c); \ 238 if (c) \ 239 archsw.arch_copyin(&s, a, sizeof(s)); \ 240 a += roundup(sizeof(s), sizeof(u_long)); \ 241} 242 243#define MOD_ADDR(a, s, c) MOD_VAR(MODINFO_ADDR, a, s, c) 244#define MOD_SIZE(a, s, c) MOD_VAR(MODINFO_SIZE, a, s, c) 245 246#define MOD_METADATA(a, mm, c) { \ 247 COPY32(MODINFO_METADATA | mm->md_type, a, c);\ 248 COPY32(mm->md_size, a, c); \ 249 if (c) \ 250 archsw.arch_copyin(mm->md_data, a, mm->md_size);\ 251 a += roundup(mm->md_size, sizeof(u_long)); \ 252} 253 254#define MOD_END(a, c) { \ 255 COPY32(MODINFO_END, a, c); \ 256 COPY32(0, a, c); \ 257} 258 259vm_offset_t 260md_copymodules(vm_offset_t addr) 261{ 262 struct preloaded_file *fp; 263 struct file_metadata *md; 264 int c; 265 266 c = addr != 0; 267 /* start with the first module on the list, should be the kernel */ 268 for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) { 269 270 MOD_NAME(addr, fp->f_name, c); /* this field must come first */ 271 MOD_TYPE(addr, fp->f_type, c); 272 if (fp->f_args) 273 MOD_ARGS(addr, fp->f_args, c); 274 MOD_ADDR(addr, fp->f_addr, c); 275 MOD_SIZE(addr, fp->f_size, c); 276 for (md = fp->f_metadata; md != NULL; md = md->md_next) { 277 if (!(md->md_type & MODINFOMD_NOCOPY)) { 278 MOD_METADATA(addr, md, c); 279 } 280 } 281 } 282 MOD_END(addr, c); 283 return(addr); 284} 285 286/* 287 * Load the information expected by a sparc64 kernel. 288 * 289 * - The 'boothowto' argument is constructed 290 * - The 'bootdev' argument is constructed 291 * - The kernel environment is copied into kernel space. 292 * - Module metadata are formatted and placed in kernel space. 293 */ 294int 295md_load(char *args, vm_offset_t *modulep) 296{ 297 struct preloaded_file *kfp; 298 struct preloaded_file *xp; 299 struct file_metadata *md; 300 vm_offset_t kernend; 301 vm_offset_t addr; 302 vm_offset_t envp; 303 vm_offset_t size; 304 char *rootdevname; 305 int howto; 306 307 howto = md_getboothowto(args); 308 309 /* 310 * Allow the environment variable 'rootdev' to override the supplied device 311 * This should perhaps go to MI code and/or have $rootdev tested/set by 312 * MI code before launching the kernel. 313 */ 314 if ((rootdevname = getenv("rootdev")) == NULL) 315 rootdevname = getenv("currdev"); 316 getrootmount(rootdevname); 317 318 /* find the last module in the chain */ 319 addr = 0; 320 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) { 321 if (addr < (xp->f_addr + xp->f_size)) 322 addr = xp->f_addr + xp->f_size; 323 } 324 /* pad to a page boundary */ 325 addr = roundup(addr, PAGE_SIZE); 326 327 /* copy our environment */ 328 envp = addr; 329 addr = md_copyenv(addr); 330 331 /* pad to a page boundary */ 332 addr = roundup(addr, PAGE_SIZE); 333 334 kernend = 0; 335 kfp = file_findfile(NULL, "elf64 kernel"); 336 if (kfp == NULL) 337 kfp = file_findfile(NULL, "elf kernel"); 338 if (kfp == NULL) 339 panic("can't find kernel file"); 340 file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto); 341 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp); 342 file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend); 343 file_addmetadata(kfp, MODINFOMD_DTLB_SLOTS, sizeof dtlb_slot, &dtlb_slot); 344 file_addmetadata(kfp, MODINFOMD_ITLB_SLOTS, sizeof itlb_slot, &itlb_slot); 345 file_addmetadata(kfp, MODINFOMD_DTLB, 346 dtlb_slot * sizeof(*dtlb_store), dtlb_store); 347 file_addmetadata(kfp, MODINFOMD_ITLB, 348 itlb_slot * sizeof(*itlb_store), itlb_store); 349 350 *modulep = addr; 351 size = md_copymodules(0); 352 kernend = roundup(addr + size, PAGE_SIZE); 353 354 md = file_findmetadata(kfp, MODINFOMD_KERNEND); 355 bcopy(&kernend, md->md_data, sizeof kernend); 356 357 (void)md_copymodules(addr); 358 359 return(0); 360} 361