sys/boot/common/bootstrap.h

   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: src/sys/boot/common/bootstrap.h,v 1.38 2003/05/01 03:56:29 peter Exp $
  27  */
  28
  29 #include <sys/types.h>
  30 #include <sys/queue.h>
  31 #include <sys/linker_set.h>
  32
  33 struct stat;
  34
  35 /*
  36  * Generic device specifier; architecture-dependant
  37  * versions may be larger, but should be allowed to
  38  * overlap.
  39  */
  40 struct devdesc
  41 {
  42     struct devsw        *d_dev;
  43     int                 d_type;
  44 #define DEVT_NONE       0
  45 #define DEVT_DISK       1
  46 #define DEVT_NET        2
  47 #define DEVT_CD         3
  48 };
  49
  50 /* Commands and return values; nonzero return sets command_errmsg != NULL */
  51 typedef int     (bootblk_cmd_t)(int argc, char *argv[]);
  52 #define COMMAND_ERRBUFSZ        (256)
  53 extern char     *command_errmsg;
  54 extern char     command_errbuf[COMMAND_ERRBUFSZ];
  55 extern int      CurrentCondition;
  56 #define CMD_OK          0
  57 #define CMD_ERROR       1
  58
  59 /* interp.c */
  60 void    interact(void);
  61 int     include(const char *filename);
  62
  63 /* interp_backslash.c */
  64 char    *backslash(char *str);
  65
  66 /* interp_parse.c */
  67 int     parse(int *argc, char ***argv, char *str);
  68
  69 /* interp_forth.c */
  70 void    bf_init(void);
  71 int     bf_run(char *line);
  72
  73 /* boot.c */
  74 int     autoboot(int timeout, char *prompt);
  75 void    autoboot_maybe(void);
  76 int     getrootmount(char *rootdev);
  77 int     rel_open(const char *path, char **abspathp, int flags);
  78 int     rel_stat(const char *path, struct stat *st);
  79 int     chdir(const char *path);
  80
  81 /* misc.c */
  82 char    *unargv(int argc, char *argv[]);
  83 void    hexdump(caddr_t region, size_t len);
  84 size_t  strlenout(vm_offset_t str);
  85 char    *strdupout(vm_offset_t str);
  86 void    kern_bzero(vm_offset_t dest, size_t len);
  87 int     kern_pread(int fd, vm_offset_t dest, size_t len, off_t off);
  88 void    *alloc_pread(int fd, off_t off, size_t len);
  89
  90 /* bcache.c */
  91 int     bcache_init(u_int nblks, size_t bsize);
  92 void    bcache_flush(void);
  93 int     bcache_strategy(void *devdata, int unit, int rw, daddr_t blk,
  94                         size_t size, char *buf, size_t *rsize);
  95
  96 void slowprint(char c);
  97
  98 /*
  99  * Disk block cache
 100  */
 101 struct bcache_devdata
 102 {
 103     int         (*dv_strategy)(void *devdata, int rw, daddr_t blk, size_t size, char *buf, size_t *rsize);
 104     void        *dv_devdata;
 105 };
 106
 107 /*
 108  * Modular console support.
 109  */
 110 struct console
 111 {
 112     const char  *c_name;
 113     const char  *c_desc;
 114     int         c_flags;
 115 #define C_PRESENTIN     (1<<0)
 116 #define C_PRESENTOUT    (1<<1)
 117 #define C_ACTIVEIN      (1<<2)
 118 #define C_ACTIVEOUT     (1<<3)
 119     void        (* c_probe)(struct console *cp);        /* set c_flags to match hardware */
 120     int         (* c_init)(int arg);                    /* reinit XXX may need more args */
 121     void        (* c_out)(int c);                       /* emit c */
 122     int         (* c_in)(void);                         /* wait for and return input */
 123     int         (* c_ready)(void);                      /* return nonzer if input waiting */
 124 };
 125 extern struct console   *consoles[];
 126 void            cons_probe(void);
 127
 128 /*
 129  * Plug-and-play enumerator/configurator interface.
 130  */
 131 struct pnphandler
 132 {
 133     const char  *pp_name;               /* handler/bus name */
 134     void        (* pp_enumerate)(void); /* enumerate PnP devices, add to chain */
 135 };
 136
 137 struct pnpident
 138 {
 139     char                        *id_ident;      /* ASCII identifier, actual format varies with bus/handler */
 140     STAILQ_ENTRY(pnpident)      id_link;
 141 };
 142
 143 struct pnpinfo
 144 {
 145     char                        *pi_desc;       /* ASCII description, optional */
 146     int                         pi_revision;    /* optional revision (or -1) if not supported */
 147     char                        *pi_module;     /* module/args nominated to handle device */
 148     int                         pi_argc;        /* module arguments */
 149     char                        **pi_argv;
 150     struct pnphandler           *pi_handler;    /* handler which detected this device */
 151     STAILQ_HEAD(,pnpident)      pi_ident;       /* list of identifiers */
 152     STAILQ_ENTRY(pnpinfo)       pi_link;
 153 };
 154
 155 STAILQ_HEAD(pnpinfo_stql, pnpinfo);
 156
 157 extern struct pnpinfo_stql pnp_devices;
 158
 159 extern struct pnphandler        *pnphandlers[];         /* provided by MD code */
 160
 161 void                    pnp_addident(struct pnpinfo *pi, char *ident);
 162 struct pnpinfo          *pnp_allocinfo(void);
 163 void                    pnp_freeinfo(struct pnpinfo *pi);
 164 void                    pnp_addinfo(struct pnpinfo *pi);
 165 char                    *pnp_eisaformat(u_int8_t *data);
 166
 167 /*
 168  *  < 0 - No ISA in system
 169  * == 0 - Maybe ISA, search for read data port
 170  *  > 0 - ISA in system, value is read data port address
 171  */
 172 extern int                      isapnp_readport;
 173
 174 /*
 175  * Preloaded file metadata header.
 176  *
 177  * Metadata are allocated on our heap, and copied into kernel space
 178  * before executing the kernel.
 179  */
 180 struct file_metadata
 181 {
 182     size_t                      md_size;
 183     u_int16_t                   md_type;
 184     struct file_metadata        *md_next;
 185     char                        md_data[1];     /* data are immediately appended */
 186 };
 187
 188 struct preloaded_file;
 189 struct mod_depend;
 190
 191 struct kernel_module
 192 {
 193     char                        *m_name;        /* module name */
 194     int                         m_version;      /* module version */
 195 /*    char                      *m_args;*/      /* arguments for the module */
 196     struct preloaded_file       *m_fp;
 197     struct kernel_module        *m_next;
 198 };
 199
 200 /*
 201  * Preloaded file information. Depending on type, file can contain
 202  * additional units called 'modules'.
 203  *
 204  * At least one file (the kernel) must be loaded in order to boot.
 205  * The kernel is always loaded first.
 206  *
 207  * String fields (m_name, m_type) should be dynamically allocated.
 208  */
 209 struct preloaded_file
 210 {
 211     char                        *f_name;        /* file name */
 212     char                        *f_type;        /* verbose file type, eg 'ELF kernel', 'pnptable', etc. */
 213     char                        *f_args;        /* arguments for the file */
 214     struct file_metadata        *f_metadata;    /* metadata that will be placed in the module directory */
 215     int                         f_loader;       /* index of the loader that read the file */
 216     vm_offset_t                 f_addr;         /* load address */
 217     size_t                      f_size;         /* file size */
 218     struct kernel_module        *f_modules;     /* list of modules if any */
 219     struct preloaded_file       *f_next;        /* next file */
 220 };
 221
 222 struct file_format
 223 {
 224     /* Load function must return EFTYPE if it can't handle the module supplied */
 225     int         (* l_load)(char *filename, u_int64_t dest, struct preloaded_file **result);
 226     /* Only a loader that will load a kernel (first module) should have an exec handler */
 227     int         (* l_exec)(struct preloaded_file *mp);
 228 };
 229
 230 extern struct file_format       *file_formats[];        /* supplied by consumer */
 231 extern struct preloaded_file    *preloaded_files;
 232
 233 int                     mod_load(char *name, struct mod_depend *verinfo, int argc, char *argv[]);
 234 int                     mod_loadkld(const char *name, int argc, char *argv[]);
 235
 236 struct preloaded_file *file_alloc(void);
 237 struct preloaded_file *file_findfile(char *name, char *type);
 238 struct file_metadata *file_findmetadata(struct preloaded_file *fp, int type);
 239 void file_discard(struct preloaded_file *fp);
 240 void file_addmetadata(struct preloaded_file *fp, int type, size_t size, void *p);
 241 int  file_addmodule(struct preloaded_file *fp, char *modname, int version,
 242         struct kernel_module **newmp);
 243
 244
 245 /* MI module loaders */
 246 #ifdef __elfN
 247 /* Relocation types. */
 248 #define ELF_RELOC_REL   1
 249 #define ELF_RELOC_RELA  2
 250
 251 /* Relocation offset for some architectures */
 252 extern u_int64_t __elfN(relocation_offset);
 253
 254 struct elf_file;
 255 typedef Elf_Addr (symaddr_fn)(struct elf_file *ef, Elf_Size symidx);
 256
 257 int     __elfN(loadfile)(char *filename, u_int64_t dest, struct preloaded_file **result);
 258 int     __elfN(obj_loadfile)(char *filename, u_int64_t dest,
 259             struct preloaded_file **result);
 260 int     __elfN(reloc)(struct elf_file *ef, symaddr_fn *symaddr,
 261             const void *reldata, int reltype, Elf_Addr relbase,
 262             Elf_Addr dataaddr, void *data, size_t len);
 263 #endif
 264
 265 /*
 266  * Support for commands
 267  */
 268 struct bootblk_command
 269 {
 270     const char          *c_name;
 271     const char          *c_desc;
 272     bootblk_cmd_t       *c_fn;
 273     int                 c_cond;
 274 };
 275
 276 #define COMMAND_SET(tag, key, desc, func)                               \
 277     static bootblk_cmd_t func;                                          \
 278     static struct bootblk_command _cmd_ ## tag = { key, desc, func, 0 };\
 279     DATA_SET(Xcommand_set, _cmd_ ## tag)
 280
 281 #define COMMAND_SET_COND(tag, key, desc, func)                          \
 282     static bootblk_cmd_t func;                                          \
 283     static struct bootblk_command _cmd_ ## tag = { key, desc, func, 1 };\
 284     DATA_SET(Xcommand_set, _cmd_ ## tag)
 285
 286 SET_DECLARE(Xcommand_set, struct bootblk_command);
 287
 288 /*
 289  * The intention of the architecture switch is to provide a convenient
 290  * encapsulation of the interface between the bootstrap MI and MD code.
 291  * MD code may selectively populate the switch at runtime based on the
 292  * actual configuration of the target system.
 293  */
 294 struct arch_switch
 295 {
 296     /* Automatically load modules as required by detected hardware */
 297     int         (*arch_autoload)(void);
 298     /* Locate the device for (name), return pointer to tail in (*path) */
 299     int         (*arch_getdev)(void **dev, const char *name, const char **path);
 300     /* Copy from local address space to module address space, similar to bcopy() */
 301     ssize_t     (*arch_copyin)(const void *src, vm_offset_t dest,
 302                                const size_t len);
 303     /* Copy to local address space from module address space, similar to bcopy() */
 304     ssize_t     (*arch_copyout)(const vm_offset_t src, void *dest,
 305                                 const size_t len);
 306     /* Read from file to module address space, same semantics as read() */
 307     ssize_t     (*arch_readin)(const int fd, vm_offset_t dest,
 308                                const size_t len);
 309     /* Perform ISA byte port I/O (only for systems with ISA) */
 310     int         (*arch_isainb)(int port);
 311     void        (*arch_isaoutb)(int port, int value);
 312 };
 313 extern struct arch_switch archsw;
 314
 315 /* This must be provided by the MD code, but should it be in the archsw? */
 316 void    delay(int delay);
 317
 318 void    dev_cleanup(void);
 319
 320 time_t  time(time_t *tloc);