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 #include <sys/boot.h> 37 38 #include <machine/metadata.h> 39 40 #include "bootstrap.h" 41 #include "libofw.h" 42 43 extern struct tlb_entry *dtlb_store; 44 extern struct tlb_entry *itlb_store; 45 46 extern int dtlb_slot; 47 extern int itlb_slot; 48 49 static int md_bootserial(void); 50 51 int 52 md_getboothowto(char *kargs) 53 { 54 char *cp; 55 int howto; 56 int active; 57 int i; 58 59 /* Parse kargs */ 60 howto = 0; 61 if (kargs != NULL) { 62 cp = kargs; 63 active = 0; 64 while (*cp != 0) { 65 if (!active && (*cp == '-')) { 66 active = 1; 67 } else if (active) 68 switch (*cp) { 69 case 'a': 70 howto |= RB_ASKNAME; 71 break; 72 case 'C': 73 howto |= RB_CDROM; 74 break; 75 case 'd': 76 howto |= RB_KDB; 77 break; 78 case 'D': 79 howto |= RB_MULTIPLE; 80 break; 81 case 'm': 82 howto |= RB_MUTE; 83 break; 84 case 'g': 85 howto |= RB_GDB; 86 break; 87 case 'h': 88 howto |= RB_SERIAL; 89 break; 90 case 'p': 91 howto |= RB_PAUSE; 92 break; 93 case 'r': 94 howto |= RB_DFLTROOT; 95 break; 96 case 's': 97 howto |= RB_SINGLE; 98 break; 99 case 'v': 100 howto |= RB_VERBOSE; 101 break; 102 default: 103 active = 0; 104 break; 105 } 106 cp++; 107 } 108 } 109 /* get equivalents from the environment */ 110 for (i = 0; howto_names[i].ev != NULL; i++) 111 if (getenv(howto_names[i].ev) != NULL) 112 howto |= howto_names[i].mask; 113 if (md_bootserial() != -1) 114 howto |= RB_SERIAL; 115 return(howto); 116 } 117 118 static int 119 md_bootserial(void) 120 { 121 char buf[64]; 122 ihandle_t inst; 123 phandle_t input; 124 phandle_t node; 125 phandle_t output; 126 127 if ((node = OF_finddevice("/options")) == -1) 128 return(-1); 129 if (OF_getprop(node, "input-device", buf, sizeof(buf)) == -1) 130 return(-1); 131 input = OF_finddevice(buf); 132 if (OF_getprop(node, "output-device", buf, sizeof(buf)) == -1) 133 return(-1); 134 output = OF_finddevice(buf); 135 if (input == -1 || output == -1 || OF_getproplen(input, "keyboard") >= 0) { 136 if ((node = OF_finddevice("/chosen")) == -1) 137 return(-1); 138 if (OF_getprop(node, "stdin", &inst, sizeof(inst)) == -1) 139 return(-1); 140 if ((input = OF_instance_to_package(inst)) == -1) 141 return(-1); 142 if (OF_getprop(node, "stdout", &inst, sizeof(inst)) == -1) 143 return(-1); 144 if ((output = OF_instance_to_package(inst)) == -1) 145 return(-1); 146 } 147 if (input != output) 148 return(-1); 149 if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1) 150 return(-1); 151 if (strcmp(buf, "serial") != 0) 152 return(-1); 153 return(0); 154 } 155 156 /* 157 * Copy the environment into the load area starting at (addr). 158 * Each variable is formatted as <name>=<value>, with a single nul 159 * separating each variable, and a double nul terminating the environment. 160 */ 161 vm_offset_t 162 md_copyenv(vm_offset_t addr) 163 { 164 struct env_var *ep; 165 166 /* traverse the environment */ 167 for (ep = environ; ep != NULL; ep = ep->ev_next) { 168 archsw.arch_copyin(ep->ev_name, addr, strlen(ep->ev_name)); 169 addr += strlen(ep->ev_name); 170 archsw.arch_copyin("=", addr, 1); 171 addr++; 172 if (ep->ev_value != NULL) { 173 archsw.arch_copyin(ep->ev_value, addr, strlen(ep->ev_value)); 174 addr += strlen(ep->ev_value); 175 } 176 archsw.arch_copyin("", addr, 1); 177 addr++; 178 } 179 archsw.arch_copyin("", addr, 1); 180 addr++; 181 return(addr); 182 } 183 184 /* 185 * Copy module-related data into the load area, where it can be 186 * used as a directory for loaded modules. 187 * 188 * Module data is presented in a self-describing format. Each datum 189 * is preceded by a 32-bit identifier and a 32-bit size field. 190 * 191 * Currently, the following data are saved: 192 * 193 * MOD_NAME (variable) module name (string) 194 * MOD_TYPE (variable) module type (string) 195 * MOD_ARGS (variable) module parameters (string) 196 * MOD_ADDR sizeof(vm_offset_t) module load address 197 * MOD_SIZE sizeof(size_t) module size 198 * MOD_METADATA (variable) type-specific metadata 199 */ 200 #define COPY32(v, a, c) { \ 201 u_int32_t x = (v); \ 202 if (c) \ 203 archsw.arch_copyin(&x, a, sizeof(x)); \ 204 a += sizeof(x); \ 205 } 206 207 #define MOD_STR(t, a, s, c) { \ 208 COPY32(t, a, c); \ 209 COPY32(strlen(s) + 1, a, c) \ 210 if (c) \ 211 archsw.arch_copyin(s, a, strlen(s) + 1);\ 212 a += roundup(strlen(s) + 1, sizeof(u_long));\ 213 } 214 215 #define MOD_NAME(a, s, c) MOD_STR(MODINFO_NAME, a, s, c) 216 #define MOD_TYPE(a, s, c) MOD_STR(MODINFO_TYPE, a, s, c) 217 #define MOD_ARGS(a, s, c) MOD_STR(MODINFO_ARGS, a, s, c) 218 219 #define MOD_VAR(t, a, s, c) { \ 220 COPY32(t, a, c); \ 221 COPY32(sizeof(s), a, c); \ 222 if (c) \ 223 archsw.arch_copyin(&s, a, sizeof(s)); \ 224 a += roundup(sizeof(s), sizeof(u_long)); \ 225 } 226 227 #define MOD_ADDR(a, s, c) MOD_VAR(MODINFO_ADDR, a, s, c) 228 #define MOD_SIZE(a, s, c) MOD_VAR(MODINFO_SIZE, a, s, c) 229 230 #define MOD_METADATA(a, mm, c) { \ 231 COPY32(MODINFO_METADATA | mm->md_type, a, c);\ 232 COPY32(mm->md_size, a, c); \ 233 if (c) \ 234 archsw.arch_copyin(mm->md_data, a, mm->md_size);\ 235 a += roundup(mm->md_size, sizeof(u_long)); \ 236 } 237 238 #define MOD_END(a, c) { \ 239 COPY32(MODINFO_END, a, c); \ 240 COPY32(0, a, c); \ 241 } 242 243 vm_offset_t 244 md_copymodules(vm_offset_t addr) 245 { 246 struct preloaded_file *fp; 247 struct file_metadata *md; 248 int c; 249 250 c = addr != 0; 251 /* start with the first module on the list, should be the kernel */ 252 for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) { 253 254 MOD_NAME(addr, fp->f_name, c); /* this field must come first */ 255 MOD_TYPE(addr, fp->f_type, c); 256 if (fp->f_args) 257 MOD_ARGS(addr, fp->f_args, c); 258 MOD_ADDR(addr, fp->f_addr, c); 259 MOD_SIZE(addr, fp->f_size, c); 260 for (md = fp->f_metadata; md != NULL; md = md->md_next) { 261 if (!(md->md_type & MODINFOMD_NOCOPY)) { 262 MOD_METADATA(addr, md, c); 263 } 264 } 265 } 266 MOD_END(addr, c); 267 return(addr); 268 } 269 270 /* 271 * Load the information expected by a sparc64 kernel. 272 * 273 * - The 'boothowto' argument is constructed 274 * - The 'bootdev' argument is constructed 275 * - The kernel environment is copied into kernel space. 276 * - Module metadata are formatted and placed in kernel space. 277 */ 278 int 279 md_load(char *args, vm_offset_t *modulep, vm_offset_t *dtbp) 280 { 281 struct preloaded_file *kfp; 282 struct preloaded_file *xp; 283 struct file_metadata *md; 284 vm_offset_t kernend; 285 vm_offset_t addr; 286 vm_offset_t envp; 287 vm_offset_t size; 288 char *rootdevname; 289 int howto; 290 291 howto = md_getboothowto(args); 292 *dtbp = 0; 293 294 /* 295 * Allow the environment variable 'rootdev' to override the supplied device 296 * This should perhaps go to MI code and/or have $rootdev tested/set by 297 * MI code before launching the kernel. 298 */ 299 if ((rootdevname = getenv("rootdev")) == NULL) 300 rootdevname = getenv("currdev"); 301 getrootmount(rootdevname); 302 303 /* find the last module in the chain */ 304 addr = 0; 305 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) { 306 if (addr < (xp->f_addr + xp->f_size)) 307 addr = xp->f_addr + xp->f_size; 308 } 309 /* pad to a page boundary */ 310 addr = roundup(addr, PAGE_SIZE); 311 312 /* copy our environment */ 313 envp = addr; 314 addr = md_copyenv(addr); 315 316 /* pad to a page boundary */ 317 addr = roundup(addr, PAGE_SIZE); 318 319 kernend = 0; 320 kfp = file_findfile(NULL, "elf64 kernel"); 321 if (kfp == NULL) 322 kfp = file_findfile(NULL, "elf kernel"); 323 if (kfp == NULL) 324 panic("can't find kernel file"); 325 file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto); 326 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp); 327 file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend); 328 file_addmetadata(kfp, MODINFOMD_DTLB_SLOTS, sizeof dtlb_slot, &dtlb_slot); 329 file_addmetadata(kfp, MODINFOMD_ITLB_SLOTS, sizeof itlb_slot, &itlb_slot); 330 file_addmetadata(kfp, MODINFOMD_DTLB, 331 dtlb_slot * sizeof(*dtlb_store), dtlb_store); 332 file_addmetadata(kfp, MODINFOMD_ITLB, 333 itlb_slot * sizeof(*itlb_store), itlb_store); 334 335 *modulep = addr; 336 size = md_copymodules(0); 337 kernend = roundup(addr + size, PAGE_SIZE); 338 339 md = file_findmetadata(kfp, MODINFOMD_KERNEND); 340 bcopy(&kernend, md->md_data, sizeof kernend); 341 342 (void)md_copymodules(addr); 343 344 return(0); 345 } 346