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("$FreeBSD$"); 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_dfltroot", RB_DFLTROOT}, 63 {"boot_gdb", RB_GDB}, 64 {"boot_multicons", RB_MULTIPLE}, 65 {"boot_mute", RB_MUTE}, 66 {"boot_pause", RB_PAUSE}, 67 {"boot_serial", RB_SERIAL}, 68 {"boot_single", RB_SINGLE}, 69 {"boot_verbose", RB_VERBOSE}, 70 {NULL, 0} 71}; 72 73int 74md_getboothowto(char *kargs) 75{ 76 char *cp; 77 int howto; 78 int active; 79 int i; 80 81 /* Parse kargs */ 82 howto = 0; 83 if (kargs != NULL) { 84 cp = kargs; 85 active = 0; 86 while (*cp != 0) { 87 if (!active && (*cp == '-')) { 88 active = 1; 89 } else if (active) 90 switch (*cp) { 91 case 'a': 92 howto |= RB_ASKNAME; 93 break; 94 case 'C': 95 howto |= RB_CDROM; 96 break; 97 case 'd': 98 howto |= RB_KDB; 99 break; 100 case 'D': 101 howto |= RB_MULTIPLE; 102 break; 103 case 'm': 104 howto |= RB_MUTE; 105 break; 106 case 'g': 107 howto |= RB_GDB; 108 break; 109 case 'h': 110 howto |= RB_SERIAL; 111 break; 112 case 'p': 113 howto |= RB_PAUSE; 114 break; 115 case 'r': 116 howto |= RB_DFLTROOT; 117 break; 118 case 's': 119 howto |= RB_SINGLE; 120 break; 121 case 'v': 122 howto |= RB_VERBOSE; 123 break; 124 default: 125 active = 0; 126 break; 127 } 128 cp++; 129 } 130 } 131 /* get equivalents from the environment */ 132 for (i = 0; howto_names[i].ev != NULL; i++) 133 if (getenv(howto_names[i].ev) != NULL) 134 howto |= howto_names[i].mask; 135 if (md_bootserial() != -1) 136 howto |= RB_SERIAL; 137 return(howto); 138} 139 140static int 141md_bootserial(void) 142{ 143 char buf[64]; 144 ihandle_t inst; 145 phandle_t input; 146 phandle_t node; 147 phandle_t output; 148 149 if ((node = OF_finddevice("/options")) == -1) 150 return(-1); 151 if (OF_getprop(node, "input-device", buf, sizeof(buf)) == -1) 152 return(-1); 153 input = OF_finddevice(buf); 154 if (OF_getprop(node, "output-device", buf, sizeof(buf)) == -1) 155 return(-1); 156 output = OF_finddevice(buf); 157 if (input == -1 || output == -1 || OF_getproplen(input, "keyboard") >= 0) { 158 if ((node = OF_finddevice("/chosen")) == -1) 159 return(-1); 160 if (OF_getprop(node, "stdin", &inst, sizeof(inst)) == -1) 161 return(-1); 162 if ((input = OF_instance_to_package(inst)) == -1) 163 return(-1); 164 if (OF_getprop(node, "stdout", &inst, sizeof(inst)) == -1) 165 return(-1); 166 if ((output = OF_instance_to_package(inst)) == -1) 167 return(-1); 168 } 169 if (input != output) 170 return(-1); 171 if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1) 172 return(-1); 173 if (strcmp(buf, "serial") != 0) 174 return(-1); 175 return(0); 176} 177 178/* 179 * Copy the environment into the load area starting at (addr). 180 * Each variable is formatted as <name>=<value>, with a single nul 181 * separating each variable, and a double nul terminating the environment. 182 */ 183vm_offset_t 184md_copyenv(vm_offset_t addr) 185{ 186 struct env_var *ep; 187 188 /* traverse the environment */ 189 for (ep = environ; ep != NULL; ep = ep->ev_next) { 190 archsw.arch_copyin(ep->ev_name, addr, strlen(ep->ev_name)); 191 addr += strlen(ep->ev_name); 192 archsw.arch_copyin("=", addr, 1); 193 addr++; 194 if (ep->ev_value != NULL) { 195 archsw.arch_copyin(ep->ev_value, addr, strlen(ep->ev_value)); 196 addr += strlen(ep->ev_value); 197 } 198 archsw.arch_copyin("", addr, 1); 199 addr++; 200 } 201 archsw.arch_copyin("", addr, 1); 202 addr++; 203 return(addr); 204} 205 206/* 207 * Copy module-related data into the load area, where it can be 208 * used as a directory for loaded modules. 209 * 210 * Module data is presented in a self-describing format. Each datum 211 * is preceded by a 32-bit identifier and a 32-bit size field. 212 * 213 * Currently, the following data are saved: 214 * 215 * MOD_NAME (variable) module name (string) 216 * MOD_TYPE (variable) module type (string) 217 * MOD_ARGS (variable) module parameters (string) 218 * MOD_ADDR sizeof(vm_offset_t) module load address 219 * MOD_SIZE sizeof(size_t) module size 220 * MOD_METADATA (variable) type-specific metadata 221 */ 222#define COPY32(v, a, c) { \ 223 u_int32_t x = (v); \ 224 if (c) \ 225 archsw.arch_copyin(&x, a, sizeof(x)); \ 226 a += sizeof(x); \ 227} 228 229#define MOD_STR(t, a, s, c) { \ 230 COPY32(t, a, c); \ 231 COPY32(strlen(s) + 1, a, c) \ 232 if (c) \ 233 archsw.arch_copyin(s, a, strlen(s) + 1);\ 234 a += roundup(strlen(s) + 1, sizeof(u_long));\ 235} 236 237#define MOD_NAME(a, s, c) MOD_STR(MODINFO_NAME, a, s, c) 238#define MOD_TYPE(a, s, c) MOD_STR(MODINFO_TYPE, a, s, c) 239#define MOD_ARGS(a, s, c) MOD_STR(MODINFO_ARGS, a, s, c) 240 241#define MOD_VAR(t, a, s, c) { \ 242 COPY32(t, a, c); \ 243 COPY32(sizeof(s), a, c); \ 244 if (c) \ 245 archsw.arch_copyin(&s, a, sizeof(s)); \ 246 a += roundup(sizeof(s), sizeof(u_long)); \ 247} 248 249#define MOD_ADDR(a, s, c) MOD_VAR(MODINFO_ADDR, a, s, c) 250#define MOD_SIZE(a, s, c) MOD_VAR(MODINFO_SIZE, a, s, c) 251 252#define MOD_METADATA(a, mm, c) { \ 253 COPY32(MODINFO_METADATA | mm->md_type, a, c);\ 254 COPY32(mm->md_size, a, c); \ 255 if (c) \ 256 archsw.arch_copyin(mm->md_data, a, mm->md_size);\ 257 a += roundup(mm->md_size, sizeof(u_long)); \ 258} 259 260#define MOD_END(a, c) { \ 261 COPY32(MODINFO_END, a, c); \ 262 COPY32(0, a, c); \ 263} 264 265vm_offset_t 266md_copymodules(vm_offset_t addr) 267{ 268 struct preloaded_file *fp; 269 struct file_metadata *md; 270 int c; 271 272 c = addr != 0; 273 /* start with the first module on the list, should be the kernel */ 274 for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) { 275 276 MOD_NAME(addr, fp->f_name, c); /* this field must come first */ 277 MOD_TYPE(addr, fp->f_type, c); 278 if (fp->f_args) 279 MOD_ARGS(addr, fp->f_args, c); 280 MOD_ADDR(addr, fp->f_addr, c); 281 MOD_SIZE(addr, fp->f_size, c); 282 for (md = fp->f_metadata; md != NULL; md = md->md_next) { 283 if (!(md->md_type & MODINFOMD_NOCOPY)) { 284 MOD_METADATA(addr, md, c); 285 } 286 } 287 } 288 MOD_END(addr, c); 289 return(addr); 290} 291 292/* 293 * Load the information expected by a sparc64 kernel. 294 * 295 * - The 'boothowto' argument is constructed 296 * - The 'bootdev' argument is constructed 297 * - The kernel environment is copied into kernel space. 298 * - Module metadata are formatted and placed in kernel space. 299 */ 300int 301md_load(char *args, vm_offset_t *modulep) 302{ 303 struct preloaded_file *kfp; 304 struct preloaded_file *xp; 305 struct file_metadata *md; 306 vm_offset_t kernend; 307 vm_offset_t addr; 308 vm_offset_t envp; 309 vm_offset_t size; 310 char *rootdevname; 311 int howto; 312 313 howto = md_getboothowto(args); 314 315 /* 316 * Allow the environment variable 'rootdev' to override the supplied device 317 * This should perhaps go to MI code and/or have $rootdev tested/set by 318 * MI code before launching the kernel. 319 */ 320 if ((rootdevname = getenv("rootdev")) == NULL) 321 rootdevname = getenv("currdev"); 322 getrootmount(rootdevname); 323 324 /* find the last module in the chain */ 325 addr = 0; 326 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) { 327 if (addr < (xp->f_addr + xp->f_size)) 328 addr = xp->f_addr + xp->f_size; 329 } 330 /* pad to a page boundary */ 331 addr = roundup(addr, PAGE_SIZE); 332 333 /* copy our environment */ 334 envp = addr; 335 addr = md_copyenv(addr); 336 337 /* pad to a page boundary */ 338 addr = roundup(addr, PAGE_SIZE); 339 340 kernend = 0; 341 kfp = file_findfile(NULL, "elf64 kernel"); 342 if (kfp == NULL) 343 kfp = file_findfile(NULL, "elf kernel"); 344 if (kfp == NULL) 345 panic("can't find kernel file"); 346 file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto); 347 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp); 348 file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend); 349 file_addmetadata(kfp, MODINFOMD_DTLB_SLOTS, sizeof dtlb_slot, &dtlb_slot); 350 file_addmetadata(kfp, MODINFOMD_ITLB_SLOTS, sizeof itlb_slot, &itlb_slot); 351 file_addmetadata(kfp, MODINFOMD_DTLB, 352 dtlb_slot * sizeof(*dtlb_store), dtlb_store); 353 file_addmetadata(kfp, MODINFOMD_ITLB, 354 itlb_slot * sizeof(*itlb_store), itlb_store); 355 356 *modulep = addr; 357 size = md_copymodules(0); 358 kernend = roundup(addr + size, PAGE_SIZE); 359 360 md = file_findmetadata(kfp, MODINFOMD_KERNEND); 361 bcopy(&kernend, md->md_data, sizeof kernend); 362 363 (void)md_copymodules(addr); 364 365 return(0); 366} 367