freebsd-dev/sys/boot/common/bootstrap.h

289 lines
9.1 KiB
C
Raw Normal View History

/*-
* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
1999-08-28 01:08:13 +00:00
* $FreeBSD$
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/linker_set.h>
/*
* Generic device specifier; architecture-dependant
* versions may be larger, but should be allowed to
* overlap.
*/
struct devdesc
{
struct devsw *d_dev;
int d_type;
#define DEVT_NONE 0
#define DEVT_DISK 1
#define DEVT_NET 2
2001-11-05 18:51:47 +00:00
#define DEVT_CD 3
};
/* Commands and return values; nonzero return sets command_errmsg != NULL */
typedef int (bootblk_cmd_t)(int argc, char *argv[]);
extern char *command_errmsg;
extern char command_errbuf[]; /* XXX blah, length */
#define CMD_OK 0
#define CMD_ERROR 1
/* interp.c */
void interact(void);
int include(const char *filename);
/* interp_backslash.c */
char *backslash(char *str);
/* interp_parse.c */
int parse(int *argc, char ***argv, char *str);
/* interp_forth.c */
void bf_init(void);
int bf_run(char *line);
/* boot.c */
int autoboot(int timeout, char *prompt);
void autoboot_maybe(void);
int getrootmount(char *rootdev);
/* misc.c */
char *unargv(int argc, char *argv[]);
void hexdump(caddr_t region, size_t len);
size_t strlenout(vm_offset_t str);
char *strdupout(vm_offset_t str);
/* bcache.c */
int bcache_init(u_int nblks, size_t bsize);
void bcache_flush(void);
int bcache_strategy(void *devdata, int unit, int rw, daddr_t blk,
size_t size, char *buf, size_t *rsize);
/*
* Disk block cache
*/
struct bcache_devdata
{
int (*dv_strategy)(void *devdata, int rw, daddr_t blk, size_t size, char *buf, size_t *rsize);
void *dv_devdata;
};
/*
* Modular console support.
*/
struct console
{
const char *c_name;
const char *c_desc;
int c_flags;
#define C_PRESENTIN (1<<0)
#define C_PRESENTOUT (1<<1)
#define C_ACTIVEIN (1<<2)
#define C_ACTIVEOUT (1<<3)
void (* c_probe)(struct console *cp); /* set c_flags to match hardware */
int (* c_init)(int arg); /* reinit XXX may need more args */
void (* c_out)(int c); /* emit c */
int (* c_in)(void); /* wait for and return input */
int (* c_ready)(void); /* return nonzer if input waiting */
};
extern struct console *consoles[];
void cons_probe(void);
/*
* Plug-and-play enumerator/configurator interface.
*/
struct pnphandler
{
const char *pp_name; /* handler/bus name */
void (* pp_enumerate)(void); /* enumerate PnP devices, add to chain */
};
struct pnpident
{
char *id_ident; /* ASCII identifier, actual format varies with bus/handler */
STAILQ_ENTRY(pnpident) id_link;
};
struct pnpinfo
{
char *pi_desc; /* ASCII description, optional */
int pi_revision; /* optional revision (or -1) if not supported */
char *pi_module; /* module/args nominated to handle device */
int pi_argc; /* module arguments */
char **pi_argv;
struct pnphandler *pi_handler; /* handler which detected this device */
STAILQ_HEAD(,pnpident) pi_ident; /* list of identifiers */
STAILQ_ENTRY(pnpinfo) pi_link;
};
STAILQ_HEAD(pnpinfo_stql, pnpinfo);
extern struct pnpinfo_stql pnp_devices;
extern struct pnphandler *pnphandlers[]; /* provided by MD code */
void pnp_addident(struct pnpinfo *pi, char *ident);
struct pnpinfo *pnp_allocinfo(void);
void pnp_freeinfo(struct pnpinfo *pi);
void pnp_addinfo(struct pnpinfo *pi);
char *pnp_eisaformat(u_int8_t *data);
/*
* < 0 - No ISA in system
* == 0 - Maybe ISA, search for read data port
* > 0 - ISA in system, value is read data port address
*/
extern int isapnp_readport;
/*
* Preloaded file metadata header.
*
* Metadata are allocated on our heap, and copied into kernel space
* before executing the kernel.
*/
struct file_metadata
{
size_t md_size;
u_int16_t md_type;
struct file_metadata *md_next;
char md_data[1]; /* data are immediately appended */
};
struct preloaded_file;
struct mod_depend;
struct kernel_module
{
char *m_name; /* module name */
int m_version; /* module version */
/* char *m_args;*/ /* arguments for the module */
struct preloaded_file *m_fp;
struct kernel_module *m_next;
};
/*
* Preloaded file information. Depending on type, file can contain
* additional units called 'modules'.
*
* At least one file (the kernel) must be loaded in order to boot.
* The kernel is always loaded first.
*
* String fields (m_name, m_type) should be dynamically allocated.
*/
struct preloaded_file
{
char *f_name; /* file name */
char *f_type; /* verbose file type, eg 'ELF kernel', 'pnptable', etc. */
char *f_args; /* arguments for the file */
struct file_metadata *f_metadata; /* metadata that will be placed in the module directory */
int f_loader; /* index of the loader that read the file */
vm_offset_t f_addr; /* load address */
size_t f_size; /* file size */
struct kernel_module *f_modules; /* list of modules if any */
struct preloaded_file *f_next; /* next file */
};
struct file_format
{
/* Load function must return EFTYPE if it can't handle the module supplied */
int (* l_load)(char *filename, vm_offset_t dest, struct preloaded_file **result);
/* Only a loader that will load a kernel (first module) should have an exec handler */
int (* l_exec)(struct preloaded_file *mp);
};
extern struct file_format *file_formats[]; /* supplied by consumer */
extern struct preloaded_file *preloaded_files;
int mod_load(char *name, struct mod_depend *verinfo, int argc, char *argv[]);
int mod_loadkld(const char *name, int argc, char *argv[]);
struct preloaded_file *file_alloc(void);
struct preloaded_file *file_findfile(char *name, char *type);
struct file_metadata *file_findmetadata(struct preloaded_file *fp, int type);
void file_discard(struct preloaded_file *fp);
void file_addmetadata(struct preloaded_file *fp, int type, size_t size, void *p);
int file_addmodule(struct preloaded_file *fp, char *modname, int version,
struct kernel_module **newmp);
/* MI module loaders */
int aout_loadfile(char *filename, vm_offset_t dest, struct preloaded_file **result);
vm_offset_t aout_findsym(char *name, struct preloaded_file *fp);
int elf_loadfile(char *filename, vm_offset_t dest, struct preloaded_file **result);
/*
* Support for commands
*/
struct bootblk_command
{
const char *c_name;
const char *c_desc;
bootblk_cmd_t *c_fn;
};
#define COMMAND_SET(tag, key, desc, func) \
static bootblk_cmd_t func; \
static struct bootblk_command _cmd_ ## tag = { key, desc, func }; \
DATA_SET(Xcommand_set, _cmd_ ## tag)
SET_DECLARE(Xcommand_set, struct bootblk_command);
/*
* The intention of the architecture switch is to provide a convenient
* encapsulation of the interface between the bootstrap MI and MD code.
* MD code may selectively populate the switch at runtime based on the
* actual configuration of the target system.
*/
struct arch_switch
{
/* Automatically load modules as required by detected hardware */
int (*arch_autoload)(void);
/* Locate the device for (name), return pointer to tail in (*path) */
int (*arch_getdev)(void **dev, const char *name, const char **path);
/* Copy from local address space to module address space, similar to bcopy() */
ssize_t (*arch_copyin)(const void *src, vm_offset_t dest,
const size_t len);
Bootstrap updates. - Move some startup code from MD to MI sections - Add a 'copyout' and some copyout-related functions. These will be obsoleted when BTX is available for the 386 and the kernel load area becomes directly addressable. - Add the ability load an arbitrary file as a module, associating and arbitrary type string with it. This can be used eg. for loading splash-screen images etc. - Add KLD module dependancy infrastructure. We know how to look for dependancies inside KLD modules, how to resolve these dependancies and what to do if things go wrong. Only works for a.out at the moment, due to lack of an MI ELF loader. Attach KLD module information to loaded modules as metadata, but don't pass it to the kernel (it can find it itself). - Load a.out KLD modules on a page boundary. Only pad the a.out BSS for the kernel, as it may want to throw symbols away. (We might want to do this for KLD modules too.) - Allow commands to be hidden from the '?' display, to avoid cluttering it with things like 'echo'. Add 'echo'. - Bring the 'prompt' command into line with the parser syntax. - Fix the verbose 'ls'; it was using an uninitialised stack variable. - Add a '-v' flag to 'lsmod' to have it display module metadata as well (not terribly useful for the average user) - Support a 'module searchpath' for required modules. - The bootstrap file on i386 is now called 'loader' to permit the /boot directory to use that name. - Discard the old i386 pread() function, as it's replaced by arch_readin()
1998-09-03 02:10:09 +00:00
/* Copy to local address space from module address space, similar to bcopy() */
ssize_t (*arch_copyout)(const vm_offset_t src, void *dest,
const size_t len);
/* Read from file to module address space, same semantics as read() */
ssize_t (*arch_readin)(const int fd, vm_offset_t dest,
const size_t len);
/* Perform ISA byte port I/O (only for systems with ISA) */
int (*arch_isainb)(int port);
void (*arch_isaoutb)(int port, int value);
};
extern struct arch_switch archsw;
/* This must be provided by the MD code, but should it be in the archsw? */
void delay(int delay);
void dev_cleanup(void);
time_t time(time_t *tloc);