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/* 37 * Generic device specifier; architecture-dependant 38 * versions may be larger, but should be allowed to 39 * overlap. 40 */ 41struct devdesc 42{ 43 struct devsw *d_dev; 44 int d_type; 45#define DEVT_NONE 0 46#define DEVT_DISK 1 47#define DEVT_NET 2 48#define DEVT_CD 3 49#define DEVT_ZFS 4 50 int d_unit; 51 void *d_opendata; 52}; 53 54/* Commands and return values; nonzero return sets command_errmsg != NULL */ 55typedef int (bootblk_cmd_t)(int argc, char *argv[]); 56extern char *command_errmsg; 57extern char command_errbuf[]; /* XXX blah, length */ 58#define CMD_OK 0 59#define CMD_ERROR 1 60 61/* interp.c */ 62void interact(void); 63int include(const char *filename); 64 65/* interp_backslash.c */ 66char *backslash(char *str); 67 68/* interp_parse.c */ 69int parse(int *argc, char ***argv, char *str); 70 71/* interp_forth.c */ 72void bf_init(void); 73int bf_run(char *line); 74 75/* boot.c */ 76int autoboot(int timeout, char *prompt); 77void autoboot_maybe(void); 78int getrootmount(char *rootdev); 79 80/* misc.c */ 81char *unargv(int argc, char *argv[]); 82void hexdump(caddr_t region, size_t len); 83size_t strlenout(vm_offset_t str); 84char *strdupout(vm_offset_t str); 85void kern_bzero(vm_offset_t dest, size_t len); 86int kern_pread(int fd, vm_offset_t dest, size_t len, off_t off); 87void *alloc_pread(int fd, off_t off, size_t len); 88 89/* bcache.c */ 90int bcache_init(u_int nblks, size_t bsize); 91void bcache_flush(void); 92int bcache_strategy(void *devdata, int unit, int rw, daddr_t blk, 93 size_t size, char *buf, size_t *rsize); 94 95/* 96 * Disk block cache 97 */ 98struct bcache_devdata 99{ 100 int (*dv_strategy)(void *devdata, int rw, daddr_t blk, size_t size, char *buf, size_t *rsize); 101 void *dv_devdata; 102}; 103 104/* 105 * Modular console support. 106 */ 107struct console 108{ 109 const char *c_name; 110 const char *c_desc; 111 int c_flags; 112#define C_PRESENTIN (1<<0) /* console can provide input */ 113#define C_PRESENTOUT (1<<1) /* console can provide output */ 114#define C_ACTIVEIN (1<<2) /* user wants input from console */ 115#define C_ACTIVEOUT (1<<3) /* user wants output to console */ 116 void (* c_probe)(struct console *cp); /* set c_flags to match hardware */ 117 int (* c_init)(int arg); /* reinit XXX may need more args */ 118 void (* c_out)(int c); /* emit c */ 119 int (* c_in)(void); /* wait for and return input */ 120 int (* c_ready)(void); /* return nonzer if input waiting */ 121}; 122extern struct console *consoles[]; 123void cons_probe(void); 124 125/* 126 * Plug-and-play enumerator/configurator interface. 127 */ 128struct pnphandler 129{ 130 const char *pp_name; /* handler/bus name */ 131 void (* pp_enumerate)(void); /* enumerate PnP devices, add to chain */ 132}; 133 134struct pnpident 135{ 136 char *id_ident; /* ASCII identifier, actual format varies with bus/handler */ 137 STAILQ_ENTRY(pnpident) id_link; 138}; 139 140struct pnpinfo 141{ 142 char *pi_desc; /* ASCII description, optional */ 143 int pi_revision; /* optional revision (or -1) if not supported */ 144 char *pi_module; /* module/args nominated to handle device */ 145 int pi_argc; /* module arguments */ 146 char **pi_argv; 147 struct pnphandler *pi_handler; /* handler which detected this device */ 148 STAILQ_HEAD(,pnpident) pi_ident; /* list of identifiers */ 149 STAILQ_ENTRY(pnpinfo) pi_link; 150}; 151 152STAILQ_HEAD(pnpinfo_stql, pnpinfo); 153 154extern struct pnpinfo_stql pnp_devices; 155 156extern struct pnphandler *pnphandlers[]; /* provided by MD code */ 157 158void pnp_addident(struct pnpinfo *pi, char *ident); 159struct pnpinfo *pnp_allocinfo(void); 160void pnp_freeinfo(struct pnpinfo *pi); 161void pnp_addinfo(struct pnpinfo *pi); 162char *pnp_eisaformat(u_int8_t *data); 163 164/* 165 * < 0 - No ISA in system 166 * == 0 - Maybe ISA, search for read data port 167 * > 0 - ISA in system, value is read data port address 168 */ 169extern int isapnp_readport; 170 171/* 172 * Preloaded file metadata header. 173 * 174 * Metadata are allocated on our heap, and copied into kernel space 175 * before executing the kernel. 176 */ 177struct file_metadata 178{ 179 size_t md_size; 180 u_int16_t md_type; 181 struct file_metadata *md_next; 182 char md_data[1]; /* data are immediately appended */ 183}; 184 185struct preloaded_file; 186struct mod_depend; 187 188struct kernel_module 189{ 190 char *m_name; /* module name */ 191 int m_version; /* module version */ 192/* char *m_args;*/ /* arguments for the module */ 193 struct preloaded_file *m_fp; 194 struct kernel_module *m_next; 195}; 196 197/* 198 * Preloaded file information. Depending on type, file can contain 199 * additional units called 'modules'. 200 * 201 * At least one file (the kernel) must be loaded in order to boot. 202 * The kernel is always loaded first. 203 * 204 * String fields (m_name, m_type) should be dynamically allocated. 205 */ 206struct preloaded_file 207{ 208 char *f_name; /* file name */ 209 char *f_type; /* verbose file type, eg 'ELF kernel', 'pnptable', etc. */ 210 char *f_args; /* arguments for the file */ 211 struct file_metadata *f_metadata; /* metadata that will be placed in the module directory */ 212 int f_loader; /* index of the loader that read the file */ 213 vm_offset_t f_addr; /* load address */ 214 size_t f_size; /* file size */ 215 struct kernel_module *f_modules; /* list of modules if any */ 216 struct preloaded_file *f_next; /* next file */ 217}; 218 219struct file_format 220{ 221 /* Load function must return EFTYPE if it can't handle the module supplied */ 222 int (* l_load)(char *filename, u_int64_t dest, struct preloaded_file **result); 223 /* Only a loader that will load a kernel (first module) should have an exec handler */ 224 int (* l_exec)(struct preloaded_file *mp); 225}; 226 227extern struct file_format *file_formats[]; /* supplied by consumer */ 228extern struct preloaded_file *preloaded_files; 229 230int mod_load(char *name, struct mod_depend *verinfo, int argc, char *argv[]); 231int mod_loadkld(const char *name, int argc, char *argv[]); 232 233struct preloaded_file *file_alloc(void); 234struct preloaded_file *file_findfile(char *name, char *type); 235struct file_metadata *file_findmetadata(struct preloaded_file *fp, int type); 236void file_discard(struct preloaded_file *fp); 237void file_addmetadata(struct preloaded_file *fp, int type, size_t size, void *p); 238int file_addmodule(struct preloaded_file *fp, char *modname, int version, 239 struct kernel_module **newmp); 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 */ 248extern u_int64_t __elfN(relocation_offset); 249 250struct elf_file; 251typedef Elf_Addr (symaddr_fn)(struct elf_file *ef, Elf_Size symidx); 252 253int __elfN(loadfile)(char *filename, u_int64_t dest, struct preloaded_file **result); 254int __elfN(obj_loadfile)(char *filename, u_int64_t dest, 255 struct preloaded_file **result); 256int __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#endif 260 261/* 262 * Support for commands 263 */ 264struct bootblk_command 265{ 266 const char *c_name; 267 const char *c_desc; 268 bootblk_cmd_t *c_fn; 269}; 270 271#define COMMAND_SET(tag, key, desc, func) \ 272 static bootblk_cmd_t func; \ 273 static struct bootblk_command _cmd_ ## tag = { key, desc, func }; \ 274 DATA_SET(Xcommand_set, _cmd_ ## tag) 275 276SET_DECLARE(Xcommand_set, struct bootblk_command); 277 278/* 279 * The intention of the architecture switch is to provide a convenient 280 * encapsulation of the interface between the bootstrap MI and MD code. 281 * MD code may selectively populate the switch at runtime based on the 282 * actual configuration of the target system. 283 */ 284struct arch_switch 285{ 286 /* Automatically load modules as required by detected hardware */ 287 int (*arch_autoload)(void); 288 /* Locate the device for (name), return pointer to tail in (*path) */ 289 int (*arch_getdev)(void **dev, const char *name, const char **path); 290 /* Copy from local address space to module address space, similar to bcopy() */ 291 ssize_t (*arch_copyin)(const void *src, vm_offset_t dest, 292 const size_t len); 293 /* Copy to local address space from module address space, similar to bcopy() */ 294 ssize_t (*arch_copyout)(const vm_offset_t src, void *dest, 295 const size_t len); 296 /* Read from file to module address space, same semantics as read() */ 297 ssize_t (*arch_readin)(const int fd, vm_offset_t dest, 298 const size_t len); 299 /* Perform ISA byte port I/O (only for systems with ISA) */ 300 int (*arch_isainb)(int port); 301 void (*arch_isaoutb)(int port, int value); 302 303 /* 304 * Interface to adjust the load address according to the "object" 305 * being loaded. 306 */ 307 uint64_t (*arch_loadaddr)(u_int type, void *data, uint64_t addr); 308#define LOAD_ELF 1 /* data points to the ELF header. */ 309#define LOAD_RAW 2 /* data points to the file name. */ 310 311 /* 312 * Interface to inform MD code about a loaded (ELF) segment. This 313 * can be used to flush caches and/or set up translations. 314 */ 315#ifdef __elfN 316 void (*arch_loadseg)(Elf_Ehdr *eh, Elf_Phdr *ph, uint64_t delta); 317#else 318 void (*arch_loadseg)(void *eh, void *ph, uint64_t delta); 319#endif 320 321 /* Probe ZFS pool(s), if needed. */ 322 void (*arch_zfs_probe)(void); 323}; 324extern struct arch_switch archsw; 325 326/* This must be provided by the MD code, but should it be in the archsw? */ 327void delay(int delay); 328 329void dev_cleanup(void); 330 331time_t time(time_t *tloc); 332 333#ifndef CTASSERT /* Allow lint to override */ 334#define CTASSERT(x) _CTASSERT(x, __LINE__) 335#define _CTASSERT(x, y) __CTASSERT(x, y) 336#define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1] 337#endif 338 339#endif /* !_BOOTSTRAP_H_ */ 340