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