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  * $DragonFly: src/sys/boot/common/bootstrap.h,v 1.3 2003/11/10 06:08:31 dillon Exp $
  28  */
  29
  30 #include <sys/types.h>
  31 #include <sys/queue.h>
  32 #include <sys/linker_set.h>
  33
  34 /*
  35  * Generic device specifier; architecture-dependant
  36  * versions may be larger, but should be allowed to
  37  * overlap.
  38  */
  39 struct devdesc
  40 {
  41     struct devsw        *d_dev;
  42     int                 d_type;
  43 #define DEVT_NONE       0
  44 #define DEVT_DISK       1
  45 #define DEVT_NET        2
  46 #define DEVT_CD         3
  47 };
  48
  49 /* Commands and return values; nonzero return sets command_errmsg != NULL */
  50 typedef int     (bootblk_cmd_t)(int argc, char *argv[]);
  51 extern char     *command_errmsg;
  52 extern char     command_errbuf[];       /* XXX blah, length */
  53 #define CMD_OK          0
  54 #define CMD_ERROR       1
  55
  56 /* interp.c */
  57 void    interact(void);
  58 int     include(const char *filename);
  59
  60 /* interp_backslash.c */
  61 char    *backslash(char *str);
  62
  63 /* interp_parse.c */
  64 int     parse(int *argc, char ***argv, char *str);
  65
  66 /* interp_forth.c */
  67 void    bf_init(void);
  68 int     bf_run(char *line);
  69
  70 /* boot.c */
  71 int     autoboot(int timeout, char *prompt);
  72 void    autoboot_maybe(void);
  73 int     getrootmount(char *rootdev);
  74
  75 /* misc.c */
  76 char    *unargv(int argc, char *argv[]);
  77 void    hexdump(caddr_t region, size_t len);
  78 size_t  strlenout(vm_offset_t str);
  79 char    *strdupout(vm_offset_t str);
  80
  81 /* bcache.c */
  82 int     bcache_init(u_int nblks, size_t bsize);
  83 void    bcache_flush(void);
  84 int     bcache_strategy(void *devdata, int unit, int rw, daddr_t blk,
  85                         size_t size, char *buf, size_t *rsize);
  86
  87 /*
  88  * Disk block cache
  89  */
  90 struct bcache_devdata
  91 {
  92     int         (*dv_strategy)(void *devdata, int rw, daddr_t blk, size_t size, char *buf, size_t *rsize);
  93     void        *dv_devdata;
  94 };
  95
  96 /*
  97  * Modular console support.
  98  */
  99 struct console
 100 {
 101     const char  *c_name;
 102     const char  *c_desc;
 103     int         c_flags;
 104 #define C_PRESENTIN     (1<<0)
 105 #define C_PRESENTOUT    (1<<1)
 106 #define C_ACTIVEIN      (1<<2)
 107 #define C_ACTIVEOUT     (1<<3)
 108     void        (* c_probe)(struct console *cp);        /* set c_flags to match hardware */
 109     int         (* c_init)(int arg);                    /* reinit XXX may need more args */
 110     void        (* c_out)(int c);                       /* emit c */
 111     int         (* c_in)(void);                         /* wait for and return input */
 112     int         (* c_ready)(void);                      /* return nonzer if input waiting */
 113 };
 114 extern struct console   *consoles[];
 115 void            cons_probe(void);
 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 pnpinfo_stql pnp_devices;
 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(u_int8_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  * Preloaded file metadata header.
 165  *
 166  * Metadata are allocated on our heap, and copied into kernel space
 167  * before executing the kernel.
 168  */
 169 struct file_metadata
 170 {
 171     size_t                      md_size;
 172     u_int16_t                   md_type;
 173     struct file_metadata        *md_next;
 174     char                        md_data[1];     /* data are immediately appended */
 175 };
 176
 177 struct preloaded_file;
 178 struct mod_depend;
 179
 180 struct kernel_module
 181 {
 182     char                        *m_name;        /* module name */
 183     int                         m_version;      /* module version */
 184 /*    char                      *m_args;*/      /* arguments for the module */
 185     struct preloaded_file       *m_fp;
 186     struct kernel_module        *m_next;
 187 };
 188
 189 /*
 190  * Preloaded file information. Depending on type, file can contain
 191  * additional units called 'modules'.
 192  *
 193  * At least one file (the kernel) must be loaded in order to boot.
 194  * The kernel is always loaded first.
 195  *
 196  * String fields (m_name, m_type) should be dynamically allocated.
 197  */
 198 struct preloaded_file
 199 {
 200     char                        *f_name;        /* file name */
 201     char                        *f_type;        /* verbose file type, eg 'ELF kernel', 'pnptable', etc. */
 202     char                        *f_args;        /* arguments for the file */
 203     struct file_metadata        *f_metadata;    /* metadata that will be placed in the module directory */
 204     int                         f_loader;       /* index of the loader that read the file */
 205     vm_offset_t                 f_addr;         /* load address */
 206     size_t                      f_size;         /* file size */
 207     struct kernel_module        *f_modules;     /* list of modules if any */
 208     struct preloaded_file       *f_next;        /* next file */
 209 };
 210
 211 struct file_format
 212 {
 213     /* Load function must return EFTYPE if it can't handle the module supplied */
 214     int         (* l_load)(char *filename, u_int64_t dest, struct preloaded_file **result);
 215     /* Only a loader that will load a kernel (first module) should have an exec handler */
 216     int         (* l_exec)(struct preloaded_file *mp);
 217 };
 218
 219 extern struct file_format       *file_formats[];        /* supplied by consumer */
 220 extern struct preloaded_file    *preloaded_files;
 221
 222 int                     mod_load(char *name, struct mod_depend *verinfo, int argc, char *argv[]);
 223 int                     mod_loadkld(const char *name, int argc, char *argv[]);
 224
 225 struct preloaded_file *file_alloc(void);
 226 struct preloaded_file *file_findfile(char *name, char *type);
 227 struct file_metadata *file_findmetadata(struct preloaded_file *fp, int type);
 228 void file_discard(struct preloaded_file *fp);
 229 void file_addmetadata(struct preloaded_file *fp, int type, size_t size, void *p);
 230 int  file_addmodule(struct preloaded_file *fp, char *modname, int version,
 231         struct kernel_module **newmp);
 232
 233
 234 /* MI module loaders */
 235 #ifdef __elfN
 236 int     __elfN(loadfile)(char *filename, u_int64_t dest, struct preloaded_file **result);
 237 #endif
 238
 239 /*
 240  * Support for commands
 241  */
 242 struct bootblk_command
 243 {
 244     const char          *c_name;
 245     const char          *c_desc;
 246     bootblk_cmd_t       *c_fn;
 247 };
 248
 249 #define COMMAND_SET(tag, key, desc, func)                               \
 250     static bootblk_cmd_t func;                                          \
 251     static struct bootblk_command _cmd_ ## tag = { key, desc, func };   \
 252     DATA_SET(Xcommand_set, _cmd_ ## tag)
 253
 254 SET_DECLARE(Xcommand_set, struct bootblk_command);
 255
 256 /*
 257  * The intention of the architecture switch is to provide a convenient
 258  * encapsulation of the interface between the bootstrap MI and MD code.
 259  * MD code may selectively populate the switch at runtime based on the
 260  * actual configuration of the target system.
 261  */
 262 struct arch_switch
 263 {
 264     /* Automatically load modules as required by detected hardware */
 265     int         (*arch_autoload)(void);
 266     /* Locate the device for (name), return pointer to tail in (*path) */
 267     int         (*arch_getdev)(void **dev, const char *name, const char **path);
 268     /* Copy from local address space to module address space, similar to bcopy() */
 269     ssize_t     (*arch_copyin)(const void *src, vm_offset_t dest,
 270                                const size_t len);
 271     /* Copy to local address space from module address space, similar to bcopy() */
 272     ssize_t     (*arch_copyout)(const vm_offset_t src, void *dest,
 273                                 const size_t len);
 274     /* Read from file to module address space, same semantics as read() */
 275     ssize_t     (*arch_readin)(const int fd, vm_offset_t dest,
 276                                const size_t len);
 277     /* Perform ISA byte port I/O (only for systems with ISA) */
 278     int         (*arch_isainb)(int port);
 279     void        (*arch_isaoutb)(int port, int value);
 280 };
 281 extern struct arch_switch archsw;
 282
 283 /* This must be provided by the MD code, but should it be in the archsw? */
 284 void    delay(int delay);
 285
 286 void    dev_cleanup(void);
 287
 288 time_t  time(time_t *tloc);