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 * $FreeBSD$ 27 */ 28 29 #ifndef _BOOTSTRAP_H_ 30 #define _BOOTSTRAP_H_ 31 32 #include <stand.h> 33 #include <sys/types.h> 34 #include <sys/queue.h> 35 #include <sys/linker_set.h> 36 #include <stdbool.h> 37 38 #include "readin.h" 39 40 /* Commands and return values; nonzero return sets command_errmsg != NULL */ 41 typedef int (bootblk_cmd_t)(int argc, char *argv[]); 42 #define COMMAND_ERRBUFSZ (256) 43 extern const char *command_errmsg; 44 extern char command_errbuf[COMMAND_ERRBUFSZ]; 45 #define CMD_OK 0 46 #define CMD_WARN 1 47 #define CMD_ERROR 2 48 #define CMD_CRIT 3 49 #define CMD_FATAL 4 50 51 /* interp.c */ 52 void interact(void); 53 void interp_emit_prompt(void); 54 int interp_builtin_cmd(int argc, char *argv[]); 55 bool interp_has_builtin_cmd(const char *cmd); 56 57 /* Called by interp.c for interp_*.c embedded interpreters */ 58 int interp_include(const char *); /* Execute commands from filename */ 59 void interp_init(void); /* Initialize interpreater */ 60 int interp_run(const char *); /* Run a single command */ 61 62 /* interp_backslash.c */ 63 char *backslash(const char *str); 64 65 /* interp_parse.c */ 66 int parse(int *argc, char ***argv, const char *str); 67 68 /* boot.c */ 69 void autoboot_maybe(void); 70 int getrootmount(char *rootdev); 71 72 /* misc.c */ 73 char *unargv(int argc, char *argv[]); 74 size_t strlenout(vm_offset_t str); 75 char *strdupout(vm_offset_t str); 76 void kern_bzero(vm_offset_t dest, size_t len); 77 int kern_pread(readin_handle_t fd, vm_offset_t dest, size_t len, off_t off); 78 void *alloc_pread(readin_handle_t fd, off_t off, size_t len); 79 80 /* bcache.c */ 81 void bcache_init(size_t nblks, size_t bsize); 82 void bcache_add_dev(int); 83 void *bcache_allocate(void); 84 void bcache_free(void *); 85 int bcache_strategy(void *devdata, int rw, daddr_t blk, size_t size, 86 char *buf, size_t *rsize); 87 88 /* 89 * Disk block cache 90 */ 91 struct bcache_devdata 92 { 93 int (*dv_strategy)(void *, int, daddr_t, size_t, char *, size_t *); 94 void *dv_devdata; 95 void *dv_cache; 96 }; 97 98 /* 99 * Modular console support. 100 */ 101 struct console 102 { 103 const char *c_name; 104 const char *c_desc; 105 int c_flags; 106 #define C_PRESENTIN (1<<0) /* console can provide input */ 107 #define C_PRESENTOUT (1<<1) /* console can provide output */ 108 #define C_ACTIVEIN (1<<2) /* user wants input from console */ 109 #define C_ACTIVEOUT (1<<3) /* user wants output to console */ 110 #define C_WIDEOUT (1<<4) /* c_out routine groks wide chars */ 111 112 /* set c_flags to match hardware */ 113 void (* c_probe)(struct console *cp); 114 /* reinit XXX may need more args */ 115 int (* c_init)(int arg); 116 /* emit c */ 117 void (* c_out)(int c); 118 /* wait for and return input */ 119 int (* c_in)(void); 120 /* return nonzero if input waiting */ 121 int (* c_ready)(void); 122 }; 123 extern struct console *consoles[]; 124 void cons_probe(void); 125 bool cons_update_mode(bool); 126 void autoload_font(bool); 127 128 extern int module_verbose; 129 enum { 130 MODULE_VERBOSE_SILENT, /* say nothing */ 131 MODULE_VERBOSE_SIZE, /* print name and size */ 132 MODULE_VERBOSE_TWIDDLE, /* show progress */ 133 MODULE_VERBOSE_FULL, /* all we have */ 134 }; 135 136 /* 137 * Plug-and-play enumerator/configurator interface. 138 */ 139 struct pnphandler 140 { 141 const char *pp_name; /* handler/bus name */ 142 void (*pp_enumerate)(void); /* enumerate PnP devices, add to chain */ 143 }; 144 145 struct pnpident 146 { 147 /* ASCII identifier, actual format varies with bus/handler */ 148 char *id_ident; 149 STAILQ_ENTRY(pnpident) id_link; 150 }; 151 152 struct pnpinfo 153 { 154 char *pi_desc; /* ASCII description, optional */ 155 int pi_revision; /* optional revision (or -1) if not supported */ 156 char *pi_module; /* module/args nominated to handle device */ 157 int pi_argc; /* module arguments */ 158 char **pi_argv; 159 struct pnphandler *pi_handler; /* handler which detected this device */ 160 STAILQ_HEAD(, pnpident) pi_ident; /* list of identifiers */ 161 STAILQ_ENTRY(pnpinfo) pi_link; 162 }; 163 164 STAILQ_HEAD(pnpinfo_stql, pnpinfo); 165 166 extern struct pnphandler *pnphandlers[]; /* provided by MD code */ 167 168 void pnp_addident(struct pnpinfo *pi, char *ident); 169 struct pnpinfo *pnp_allocinfo(void); 170 void pnp_freeinfo(struct pnpinfo *pi); 171 void pnp_addinfo(struct pnpinfo *pi); 172 char *pnp_eisaformat(uint8_t *data); 173 174 /* 175 * < 0 - No ISA in system 176 * == 0 - Maybe ISA, search for read data port 177 * > 0 - ISA in system, value is read data port address 178 */ 179 extern int isapnp_readport; 180 181 /* 182 * Version information 183 */ 184 extern char bootprog_info[]; 185 186 /* 187 * Interpreter information 188 */ 189 extern const char bootprog_interp[]; 190 #define INTERP_DEFINE(interpstr) \ 191 const char bootprog_interp[] = "$Interpreter:" interpstr 192 193 194 /* 195 * Preloaded file metadata header. 196 * 197 * Metadata are allocated on our heap, and copied into kernel space 198 * before executing the kernel. 199 */ 200 struct file_metadata 201 { 202 size_t md_size; 203 uint16_t md_type; 204 vm_offset_t md_addr; /* Valid after copied to kernel space */ 205 struct file_metadata *md_next; 206 char md_data[1]; /* data are immediately appended */ 207 }; 208 209 struct preloaded_file; 210 struct mod_depend; 211 212 struct kernel_module 213 { 214 char *m_name; /* module name */ 215 int m_version; /* module version */ 216 /* char *m_args; */ /* arguments for the module */ 217 struct preloaded_file *m_fp; 218 struct kernel_module *m_next; 219 }; 220 221 /* 222 * Preloaded file information. Depending on type, file can contain 223 * additional units called 'modules'. 224 * 225 * At least one file (the kernel) must be loaded in order to boot. 226 * The kernel is always loaded first. 227 * 228 * String fields (m_name, m_type) should be dynamically allocated. 229 */ 230 struct preloaded_file 231 { 232 char *f_name; /* file name */ 233 char *f_type; /* verbose file type, eg 'ELF kernel', 'pnptable', etc. */ 234 char *f_args; /* arguments for the file */ 235 /* metadata that will be placed in the module directory */ 236 struct file_metadata *f_metadata; 237 int f_loader; /* index of the loader that read the file */ 238 vm_offset_t f_addr; /* load address */ 239 size_t f_size; /* file size */ 240 struct kernel_module *f_modules; /* list of modules if any */ 241 struct preloaded_file *f_next; /* next file */ 242 #ifdef __amd64__ 243 bool f_kernphys_relocatable; 244 #endif 245 #if defined(__i386__) 246 bool f_tg_kernel_support; 247 #endif 248 }; 249 250 struct file_format 251 { 252 /* 253 * Load function must return EFTYPE if it can't handle 254 * the module supplied 255 */ 256 int (*l_load)(char *, uint64_t, struct preloaded_file **); 257 /* 258 * Only a loader that will load a kernel (first module) 259 * should have an exec handler 260 */ 261 int (*l_exec)(struct preloaded_file *); 262 }; 263 264 extern struct file_format *file_formats[]; /* supplied by consumer */ 265 extern struct preloaded_file *preloaded_files; 266 267 int mod_load(char *name, struct mod_depend *verinfo, int argc, char *argv[]); 268 int mod_loadkld(const char *name, int argc, char *argv[]); 269 void unload(void); 270 271 struct preloaded_file *file_alloc(void); 272 struct preloaded_file *file_findfile(const char *name, const char *type); 273 struct file_metadata *file_findmetadata(struct preloaded_file *fp, int type); 274 struct preloaded_file *file_loadraw(const char *name, char *type, int insert); 275 void file_discard(struct preloaded_file *fp); 276 void file_addmetadata(struct preloaded_file *, int, size_t, void *); 277 int file_addmodule(struct preloaded_file *, char *, int, 278 struct kernel_module **); 279 void file_removemetadata(struct preloaded_file *fp); 280 int file_addbuf(const char *name, const char *type, size_t len, void *buf); 281 int tslog_init(void); 282 int tslog_publish(void); 283 284 vm_offset_t build_font_module(vm_offset_t); 285 286 /* MI module loaders */ 287 #ifdef __elfN 288 /* Relocation types. */ 289 #define ELF_RELOC_REL 1 290 #define ELF_RELOC_RELA 2 291 292 /* Relocation offset for some architectures */ 293 extern uint64_t __elfN(relocation_offset); 294 295 struct elf_file; 296 typedef Elf_Addr (symaddr_fn)(struct elf_file *ef, Elf_Size symidx); 297 298 int __elfN(loadfile)(char *, uint64_t, struct preloaded_file **); 299 int __elfN(obj_loadfile)(char *, uint64_t, struct preloaded_file **); 300 int __elfN(reloc)(struct elf_file *ef, symaddr_fn *symaddr, 301 const void *reldata, int reltype, Elf_Addr relbase, 302 Elf_Addr dataaddr, void *data, size_t len); 303 int __elfN(loadfile_raw)(char *, uint64_t, struct preloaded_file **, int); 304 int __elfN(load_modmetadata)(struct preloaded_file *, uint64_t); 305 #endif 306 307 /* 308 * Support for commands 309 */ 310 struct bootblk_command 311 { 312 const char *c_name; 313 const char *c_desc; 314 bootblk_cmd_t *c_fn; 315 }; 316 317 #define COMMAND_SET(tag, key, desc, func) \ 318 static bootblk_cmd_t func; \ 319 static struct bootblk_command _cmd_ ## tag = { key, desc, func }; \ 320 DATA_SET(Xcommand_set, _cmd_ ## tag) 321 322 SET_DECLARE(Xcommand_set, struct bootblk_command); 323 324 /* 325 * The intention of the architecture switch is to provide a convenient 326 * encapsulation of the interface between the bootstrap MI and MD code. 327 * MD code may selectively populate the switch at runtime based on the 328 * actual configuration of the target system. 329 */ 330 struct arch_switch 331 { 332 /* Automatically load modules as required by detected hardware */ 333 int (*arch_autoload)(void); 334 /* Locate the device for (name), return pointer to tail in (*path) */ 335 int (*arch_getdev)(void **dev, const char *name, const char **path); 336 /* 337 * Copy from local address space to module address space, 338 * similar to bcopy() 339 */ 340 ssize_t (*arch_copyin)(const void *, vm_offset_t, const size_t); 341 /* 342 * Copy to local address space from module address space, 343 * similar to bcopy() 344 */ 345 ssize_t (*arch_copyout)(const vm_offset_t, void *, const size_t); 346 /* Read from file to module address space, same semantics as read() */ 347 ssize_t (*arch_readin)(readin_handle_t, vm_offset_t, const size_t); 348 /* Perform ISA byte port I/O (only for systems with ISA) */ 349 int (*arch_isainb)(int port); 350 void (*arch_isaoutb)(int port, int value); 351 352 /* 353 * Interface to adjust the load address according to the "object" 354 * being loaded. 355 */ 356 uint64_t (*arch_loadaddr)(u_int type, void *data, uint64_t addr); 357 #define LOAD_ELF 1 /* data points to the ELF header. */ 358 #define LOAD_RAW 2 /* data points to the file name. */ 359 360 /* 361 * Interface to inform MD code about a loaded (ELF) segment. This 362 * can be used to flush caches and/or set up translations. 363 */ 364 #ifdef __elfN 365 void (*arch_loadseg)(Elf_Ehdr *eh, Elf_Phdr *ph, uint64_t delta); 366 #else 367 void (*arch_loadseg)(void *eh, void *ph, uint64_t delta); 368 #endif 369 370 /* Probe ZFS pool(s), if needed. */ 371 void (*arch_zfs_probe)(void); 372 373 /* Return the hypervisor name/type or NULL if not virtualized. */ 374 const char *(*arch_hypervisor)(void); 375 376 /* For kexec-type loaders, get ksegment structure */ 377 void (*arch_kexec_kseg_get)(int *nseg, void **kseg); 378 }; 379 extern struct arch_switch archsw; 380 381 /* This must be provided by the MD code, but should it be in the archsw? */ 382 void delay(int delay); 383 384 void dev_cleanup(void); 385 386 /* 387 * nvstore API. 388 */ 389 typedef int (nvstore_getter_cb_t)(void *, const char *, void **); 390 typedef int (nvstore_setter_cb_t)(void *, int, const char *, 391 const void *, size_t); 392 typedef int (nvstore_setter_str_cb_t)(void *, const char *, const char *, 393 const char *); 394 typedef int (nvstore_unset_cb_t)(void *, const char *); 395 typedef int (nvstore_print_cb_t)(void *, void *); 396 typedef int (nvstore_iterate_cb_t)(void *, int (*)(void *, void *)); 397 398 typedef struct nvs_callbacks { 399 nvstore_getter_cb_t *nvs_getter; 400 nvstore_setter_cb_t *nvs_setter; 401 nvstore_setter_str_cb_t *nvs_setter_str; 402 nvstore_unset_cb_t *nvs_unset; 403 nvstore_print_cb_t *nvs_print; 404 nvstore_iterate_cb_t *nvs_iterate; 405 } nvs_callbacks_t; 406 407 int nvstore_init(const char *, nvs_callbacks_t *, void *); 408 int nvstore_fini(const char *); 409 void *nvstore_get_store(const char *); 410 int nvstore_print(void *); 411 int nvstore_get_var(void *, const char *, void **); 412 int nvstore_set_var(void *, int, const char *, void *, size_t); 413 int nvstore_set_var_from_string(void *, const char *, const char *, 414 const char *); 415 int nvstore_unset_var(void *, const char *); 416 417 /* common code to set currdev variable. */ 418 extern int mount_currdev(struct env_var *, int, const void *); 419 420 #ifndef CTASSERT 421 #define CTASSERT(x) _Static_assert(x, "compile-time assertion failed") 422 #endif 423 424 #endif /* !_BOOTSTRAP_H_ */ 425