usr/src/boot/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
  27 #ifndef _BOOTSTRAP_H_
  28 #define _BOOTSTRAP_H_
  29
  30 #include <sys/types.h>
  31 #include <sys/queue.h>
  32 #include <sys/linker_set.h>
  33
  34 /* Commands and return values; nonzero return sets command_errmsg != NULL */
  35 typedef int     (bootblk_cmd_t)(int argc, char *argv[]);
  36 #define COMMAND_ERRBUFSZ        (256)
  37 extern const char       *command_errmsg;
  38 extern char     command_errbuf[COMMAND_ERRBUFSZ];
  39 #define CMD_OK          0
  40 #define CMD_WARN        1
  41 #define CMD_ERROR       2
  42 #define CMD_CRIT        3
  43 #define CMD_FATAL       4
  44
  45 /* interp.c */
  46 void    interact(const char *rc);
  47 int     include(const char *filename);
  48
  49 /* interp_backslash.c */
  50 char    *backslash(char *str);
  51
  52 /* interp_parse.c */
  53 int     parse(int *argc, char ***argv, char *str);
  54
  55 /* interp_forth.c */
  56 void    bf_init(char *rc);
  57 int     bf_run(char *line);
  58
  59 /* boot.c */
  60 int     autoboot(int timeout, char *prompt);
  61 void    autoboot_maybe(void);
  62 int     getrootmount(char *rootdev);
  63
  64 /* misc.c */
  65 char    *unargv(int argc, char *argv[]);
  66 void    hexdump(caddr_t region, size_t len);
  67 size_t  strlenout(vm_offset_t str);
  68 char    *strdupout(vm_offset_t str);
  69 void    kern_bzero(vm_offset_t dest, size_t len);
  70 int     kern_pread(int fd, vm_offset_t dest, size_t len, off_t off);
  71 void    *alloc_pread(int fd, off_t off, size_t len);
  72
  73 /* bcache.c */
  74 void    bcache_init(size_t nblks, size_t bsize);
  75 void    bcache_add_dev(int);
  76 void    *bcache_allocate(void);
  77 void    bcache_free(void *);
  78 int     bcache_strategy(void *devdata, int rw, daddr_t blk,
  79     size_t size, char *buf, size_t *rsize);
  80
  81 /*
  82  * Disk block cache
  83  */
  84 struct bcache_devdata
  85 {
  86     int         (*dv_strategy)(void *devdata, int rw, daddr_t blk,
  87                     size_t size, char *buf, size_t *rsize);
  88     void        *dv_devdata;
  89     void        *dv_cache;
  90 };
  91
  92 /*
  93  * Modular console support.
  94  */
  95 struct console
  96 {
  97     const char  *c_name;
  98     const char  *c_desc;
  99     int         c_flags;
 100 #define C_PRESENTIN     (1<<0)      /* console can provide input */
 101 #define C_PRESENTOUT    (1<<1)      /* console can provide output */
 102 #define C_ACTIVEIN      (1<<2)      /* user wants input from console */
 103 #define C_ACTIVEOUT     (1<<3)      /* user wants output to console */
 104 #define C_WIDEOUT       (1<<4)      /* c_out routine groks wide chars */
 105 #define C_MODERAW       (1<<5)      /* raw mode */
 106     void        (*c_probe)(struct console *);   /* set c_flags to match hardware */
 107     int         (*c_init)(struct console *, int);       /* reinit XXX may need more args */
 108     void        (*c_out)(struct console *, int);        /* emit c */
 109     int         (*c_in)(struct console *);      /* wait for and return input */
 110     int         (*c_ready)(struct console *);   /* return nonzer if input waiting */
 111     void        *c_private;             /* private data */
 112 };
 113 extern struct console   *consoles[];
 114 void            cons_probe(void);
 115 void            cons_mode(int);
 116
 117 /*
 118  * Plug-and-play enumerator/configurator interface.
 119  */
 120 struct pnphandler
 121 {
 122     const char  *pp_name;               /* handler/bus name */
 123     void        (* pp_enumerate)(void); /* enumerate PnP devices, add to chain */
 124 };
 125
 126 struct pnpident
 127 {
 128     char                        *id_ident;      /* ASCII identifier, actual format varies with bus/handler */
 129     STAILQ_ENTRY(pnpident)      id_link;
 130 };
 131
 132 struct pnpinfo
 133 {
 134     char                        *pi_desc;       /* ASCII description, optional */
 135     int                         pi_revision;    /* optional revision (or -1) if not supported */
 136     char                        *pi_module;     /* module/args nominated to handle device */
 137     int                         pi_argc;        /* module arguments */
 138     char                        **pi_argv;
 139     struct pnphandler           *pi_handler;    /* handler which detected this device */
 140     STAILQ_HEAD(,pnpident)      pi_ident;       /* list of identifiers */
 141     STAILQ_ENTRY(pnpinfo)       pi_link;
 142 };
 143
 144 STAILQ_HEAD(pnpinfo_stql, pnpinfo);
 145
 146 extern struct pnphandler        *pnphandlers[];         /* provided by MD code */
 147
 148 void                    pnp_addident(struct pnpinfo *pi, char *ident);
 149 struct pnpinfo          *pnp_allocinfo(void);
 150 void                    pnp_freeinfo(struct pnpinfo *pi);
 151 void                    pnp_addinfo(struct pnpinfo *pi);
 152 char                    *pnp_eisaformat(u_int8_t *data);
 153
 154 /*
 155  *  < 0 - No ISA in system
 156  * == 0 - Maybe ISA, search for read data port
 157  *  > 0 - ISA in system, value is read data port address
 158  */
 159 extern int                      isapnp_readport;
 160
 161 /*
 162  * Preloaded file metadata header.
 163  *
 164  * Metadata are allocated on our heap, and copied into kernel space
 165  * before executing the kernel.
 166  */
 167 struct file_metadata
 168 {
 169     size_t                      md_size;
 170     u_int16_t                   md_type;
 171     struct file_metadata        *md_next;
 172     char                        md_data[1];     /* data are immediately appended */
 173 };
 174
 175 struct preloaded_file;
 176 struct mod_depend;
 177
 178 struct kernel_module
 179 {
 180     char                        *m_name;        /* module name */
 181     int                         m_version;      /* module version */
 182     char                        *m_args;        /* arguments for the module */
 183     struct preloaded_file       *m_fp;
 184     struct kernel_module        *m_next;
 185 };
 186
 187 /*
 188  * Preloaded file information. Depending on type, file can contain
 189  * additional units called 'modules'.
 190  *
 191  * At least one file (the kernel) must be loaded in order to boot.
 192  * The kernel is always loaded first.
 193  *
 194  * String fields (m_name, m_type) should be dynamically allocated.
 195  */
 196 struct preloaded_file
 197 {
 198     char                        *f_name;        /* file name */
 199     char                        *f_type;        /* verbose file type, eg 'ELF kernel', 'pnptable', etc. */
 200     char                        *f_args;        /* arguments for the file */
 201     struct file_metadata        *f_metadata;    /* metadata that will be placed in the module directory */
 202     int                         f_loader;       /* index of the loader that read the file */
 203     vm_offset_t                 f_addr;         /* load address */
 204     size_t                      f_size;         /* file size */
 205     struct kernel_module        *f_modules;     /* list of modules if any */
 206     struct preloaded_file       *f_next;        /* next file */
 207 };
 208
 209 struct file_format
 210 {
 211     /* Load function must return EFTYPE if it can't handle the module supplied */
 212     int         (* l_load)(char *filename, u_int64_t dest, struct preloaded_file **result);
 213     /* Only a loader that will load a kernel (first module) should have an exec handler */
 214     int         (* l_exec)(struct preloaded_file *mp);
 215 };
 216
 217 extern struct file_format       *file_formats[];        /* supplied by consumer */
 218 extern struct preloaded_file    *preloaded_files;
 219
 220 int                     mod_load(char *name, struct mod_depend *verinfo, int argc, char *argv[]);
 221 int                     mod_loadkld(const char *name, int argc, char *argv[]);
 222 void                    unload(void);
 223
 224 struct preloaded_file *file_alloc(void);
 225 struct preloaded_file *file_findfile(const char *name, const char *type);
 226 struct file_metadata *file_findmetadata(struct preloaded_file *fp, int type);
 227 struct preloaded_file *file_loadraw(const char *name, char *type, int argc,
 228         char **argv, int insert);
 229 void file_discard(struct preloaded_file *fp);
 230 void file_addmetadata(struct preloaded_file *fp, int type, size_t size, void *p);
 231 int  file_addmodule(struct preloaded_file *fp, char *modname, int version,
 232         struct kernel_module **newmp);
 233 void build_environment_module(void);
 234 vm_offset_t bi_copyenv(vm_offset_t);
 235
 236 /* MI module loaders */
 237 #ifdef __elfN
 238 /* Relocation types. */
 239 #define ELF_RELOC_REL   1
 240 #define ELF_RELOC_RELA  2
 241
 242 /* Relocation offset for some architectures */
 243 extern u_int64_t __elfN(relocation_offset);
 244
 245 struct elf_file;
 246 typedef Elf_Addr (symaddr_fn)(struct elf_file *ef, Elf_Size symidx);
 247
 248 int     elf64_loadfile(char *, uint64_t, struct preloaded_file **);
 249 int     elf32_loadfile(char *, uint64_t, struct preloaded_file **);
 250 int     elf64_obj_loadfile(char *, uint64_t, struct preloaded_file **);
 251 int     elf32_obj_loadfile(char *, uint64_t, struct preloaded_file **);
 252 int     __elfN(reloc)(struct elf_file *ef, symaddr_fn *symaddr,
 253             const void *reldata, int reltype, Elf_Addr relbase,
 254             Elf_Addr dataaddr, void *data, size_t len);
 255 int     elf64_loadfile_raw(char *, uint64_t, struct preloaded_file **, int);
 256 int     elf32_loadfile_raw(char *, uint64_t, struct preloaded_file **, int);
 257 int     elf64_load_modmetadata(struct preloaded_file *, uint64_t);
 258 int     elf32_load_modmetadata(struct preloaded_file *, uint64_t);
 259 #endif
 260
 261 /*
 262  * Support for commands
 263  */
 264 struct 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
 276 SET_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  */
 284 struct 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     vm_offset_t (*arch_loadaddr)(u_int type, void *data, vm_offset_t addr);
 308 #define LOAD_ELF        1       /* data points to the ELF header. */
 309 #define LOAD_RAW        2       /* data points to the module file name. */
 310 #define LOAD_KERN       3       /* data points to the kernel file name. */
 311 #define LOAD_MEM        4       /* data points to int for buffer size. */
 312     /*
 313      * Interface to release the load address.
 314      */
 315     void        (*arch_free_loadaddr)(uint64_t addr, uint64_t pages);
 316
 317     /*
 318      * Interface to inform MD code about a loaded (ELF) segment. This
 319      * can be used to flush caches and/or set up translations.
 320      */
 321 #ifdef __elfN
 322     void        (*arch_loadseg)(Elf_Ehdr *eh, Elf_Phdr *ph, uint64_t delta);
 323 #else
 324     void        (*arch_loadseg)(void *eh, void *ph, uint64_t delta);
 325 #endif
 326
 327     /* Probe ZFS pool(s), if needed. */
 328     void        (*arch_zfs_probe)(void);
 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 #ifndef CTASSERT                /* Allow lint to override */
 338 #define CTASSERT(x)             _CTASSERT(x, __LINE__)
 339 #define _CTASSERT(x, y)         __CTASSERT(x, y)
 340 #define __CTASSERT(x, y)        typedef char __assert ## y[(x) ? 1 : -1]
 341 #endif
 342
 343 #endif /* !_BOOTSTRAP_H_ */