340 lines
11 KiB
C
340 lines
11 KiB
C
/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _BOOTSTRAP_H_
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#define _BOOTSTRAP_H_
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/linker_set.h>
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/* Commands and return values; nonzero return sets command_errmsg != NULL */
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typedef int (bootblk_cmd_t)(int argc, char *argv[]);
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#define COMMAND_ERRBUFSZ (256)
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extern char *command_errmsg;
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extern char command_errbuf[COMMAND_ERRBUFSZ];
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#define CMD_OK 0
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#define CMD_WARN 1
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#define CMD_ERROR 2
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#define CMD_CRIT 3
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#define CMD_FATAL 4
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/* interp.c */
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void interact(void);
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void interp_emit_prompt(void);
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int interp_builtin_cmd(int argc, char *argv[]);
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/* Called by interp.c for interp_*.c embedded interpreters */
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int interp_include(const char *filename); /* Execute commands from filename */
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void interp_init(void); /* Initialize interpreater */
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int interp_run(const char *line); /* Run a single command */
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/* interp_backslash.c */
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char *backslash(const char *str);
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/* interp_parse.c */
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int parse(int *argc, char ***argv, const char *str);
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/* boot.c */
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int autoboot(int timeout, char *prompt);
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void autoboot_maybe(void);
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int getrootmount(char *rootdev);
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/* misc.c */
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char *unargv(int argc, char *argv[]);
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void hexdump(caddr_t region, size_t len);
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size_t strlenout(vm_offset_t str);
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char *strdupout(vm_offset_t str);
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void kern_bzero(vm_offset_t dest, size_t len);
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int kern_pread(int fd, vm_offset_t dest, size_t len, off_t off);
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void *alloc_pread(int fd, off_t off, size_t len);
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/* bcache.c */
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void bcache_init(size_t nblks, size_t bsize);
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void bcache_add_dev(int);
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void *bcache_allocate(void);
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void bcache_free(void *);
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int bcache_strategy(void *devdata, int rw, daddr_t blk, size_t size,
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char *buf, size_t *rsize);
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/*
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* Disk block cache
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*/
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struct bcache_devdata
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{
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int (*dv_strategy)(void *devdata, int rw, daddr_t blk,
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size_t size, char *buf, size_t *rsize);
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void *dv_devdata;
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void *dv_cache;
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};
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/*
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* Modular console support.
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*/
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struct console
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{
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const char *c_name;
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const char *c_desc;
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int c_flags;
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#define C_PRESENTIN (1<<0) /* console can provide input */
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#define C_PRESENTOUT (1<<1) /* console can provide output */
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#define C_ACTIVEIN (1<<2) /* user wants input from console */
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#define C_ACTIVEOUT (1<<3) /* user wants output to console */
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#define C_WIDEOUT (1<<4) /* c_out routine groks wide chars */
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void (* c_probe)(struct console *cp); /* set c_flags to match hardware */
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int (* c_init)(int arg); /* reinit XXX may need more args */
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void (* c_out)(int c); /* emit c */
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int (* c_in)(void); /* wait for and return input */
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int (* c_ready)(void); /* return nonzer if input waiting */
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};
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extern struct console *consoles[];
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void cons_probe(void);
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/*
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* Plug-and-play enumerator/configurator interface.
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*/
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struct pnphandler
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{
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const char *pp_name; /* handler/bus name */
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void (* pp_enumerate)(void); /* enumerate PnP devices, add to chain */
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};
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struct pnpident
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{
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char *id_ident; /* ASCII identifier, actual format varies with bus/handler */
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STAILQ_ENTRY(pnpident) id_link;
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};
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struct pnpinfo
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{
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char *pi_desc; /* ASCII description, optional */
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int pi_revision; /* optional revision (or -1) if not supported */
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char *pi_module; /* module/args nominated to handle device */
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int pi_argc; /* module arguments */
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char **pi_argv;
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struct pnphandler *pi_handler; /* handler which detected this device */
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STAILQ_HEAD(,pnpident) pi_ident; /* list of identifiers */
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STAILQ_ENTRY(pnpinfo) pi_link;
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};
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STAILQ_HEAD(pnpinfo_stql, pnpinfo);
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extern struct pnphandler *pnphandlers[]; /* provided by MD code */
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void pnp_addident(struct pnpinfo *pi, char *ident);
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struct pnpinfo *pnp_allocinfo(void);
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void pnp_freeinfo(struct pnpinfo *pi);
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void pnp_addinfo(struct pnpinfo *pi);
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char *pnp_eisaformat(u_int8_t *data);
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/*
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* < 0 - No ISA in system
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* == 0 - Maybe ISA, search for read data port
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* > 0 - ISA in system, value is read data port address
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*/
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extern int isapnp_readport;
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/*
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* Preloaded file metadata header.
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*
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* Metadata are allocated on our heap, and copied into kernel space
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* before executing the kernel.
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*/
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struct file_metadata
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{
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size_t md_size;
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u_int16_t md_type;
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struct file_metadata *md_next;
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char md_data[1]; /* data are immediately appended */
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};
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struct preloaded_file;
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struct mod_depend;
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struct kernel_module
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{
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char *m_name; /* module name */
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int m_version; /* module version */
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/* char *m_args;*/ /* arguments for the module */
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struct preloaded_file *m_fp;
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struct kernel_module *m_next;
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};
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/*
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* Preloaded file information. Depending on type, file can contain
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* additional units called 'modules'.
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*
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* At least one file (the kernel) must be loaded in order to boot.
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* The kernel is always loaded first.
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*
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* String fields (m_name, m_type) should be dynamically allocated.
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*/
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struct preloaded_file
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{
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char *f_name; /* file name */
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char *f_type; /* verbose file type, eg 'ELF kernel', 'pnptable', etc. */
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char *f_args; /* arguments for the file */
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struct file_metadata *f_metadata; /* metadata that will be placed in the module directory */
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int f_loader; /* index of the loader that read the file */
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vm_offset_t f_addr; /* load address */
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size_t f_size; /* file size */
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struct kernel_module *f_modules; /* list of modules if any */
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struct preloaded_file *f_next; /* next file */
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};
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struct file_format
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{
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/* Load function must return EFTYPE if it can't handle the module supplied */
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int (* l_load)(char *filename, u_int64_t dest, struct preloaded_file **result);
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/* Only a loader that will load a kernel (first module) should have an exec handler */
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int (* l_exec)(struct preloaded_file *mp);
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};
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extern struct file_format *file_formats[]; /* supplied by consumer */
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extern struct preloaded_file *preloaded_files;
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int mod_load(char *name, struct mod_depend *verinfo, int argc, char *argv[]);
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int mod_loadkld(const char *name, int argc, char *argv[]);
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void unload(void);
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struct preloaded_file *file_alloc(void);
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struct preloaded_file *file_findfile(const char *name, const char *type);
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struct file_metadata *file_findmetadata(struct preloaded_file *fp, int type);
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struct preloaded_file *file_loadraw(const char *name, char *type, int insert);
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void file_discard(struct preloaded_file *fp);
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void file_addmetadata(struct preloaded_file *fp, int type, size_t size, void *p);
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int file_addmodule(struct preloaded_file *fp, char *modname, int version,
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struct kernel_module **newmp);
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void file_removemetadata(struct preloaded_file *fp);
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/* MI module loaders */
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#ifdef __elfN
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/* Relocation types. */
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#define ELF_RELOC_REL 1
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#define ELF_RELOC_RELA 2
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/* Relocation offset for some architectures */
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extern u_int64_t __elfN(relocation_offset);
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struct elf_file;
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typedef Elf_Addr (symaddr_fn)(struct elf_file *ef, Elf_Size symidx);
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int __elfN(loadfile)(char *filename, u_int64_t dest, struct preloaded_file **result);
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int __elfN(obj_loadfile)(char *filename, u_int64_t dest,
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struct preloaded_file **result);
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int __elfN(reloc)(struct elf_file *ef, symaddr_fn *symaddr,
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const void *reldata, int reltype, Elf_Addr relbase,
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Elf_Addr dataaddr, void *data, size_t len);
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int __elfN(loadfile_raw)(char *filename, u_int64_t dest,
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struct preloaded_file **result, int multiboot);
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int __elfN(load_modmetadata)(struct preloaded_file *fp, u_int64_t dest);
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#endif
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/*
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* Support for commands
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*/
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struct bootblk_command
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{
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const char *c_name;
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const char *c_desc;
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bootblk_cmd_t *c_fn;
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};
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#define COMMAND_SET(tag, key, desc, func) \
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static bootblk_cmd_t func; \
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static struct bootblk_command _cmd_ ## tag = { key, desc, func }; \
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DATA_SET(Xcommand_set, _cmd_ ## tag)
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SET_DECLARE(Xcommand_set, struct bootblk_command);
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/*
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* The intention of the architecture switch is to provide a convenient
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* encapsulation of the interface between the bootstrap MI and MD code.
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* MD code may selectively populate the switch at runtime based on the
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* actual configuration of the target system.
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*/
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struct arch_switch
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{
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/* Automatically load modules as required by detected hardware */
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int (*arch_autoload)(void);
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/* Locate the device for (name), return pointer to tail in (*path) */
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int (*arch_getdev)(void **dev, const char *name, const char **path);
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/* Copy from local address space to module address space, similar to bcopy() */
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ssize_t (*arch_copyin)(const void *src, vm_offset_t dest,
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const size_t len);
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/* Copy to local address space from module address space, similar to bcopy() */
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ssize_t (*arch_copyout)(const vm_offset_t src, void *dest,
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const size_t len);
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/* Read from file to module address space, same semantics as read() */
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ssize_t (*arch_readin)(const int fd, vm_offset_t dest,
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const size_t len);
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/* Perform ISA byte port I/O (only for systems with ISA) */
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int (*arch_isainb)(int port);
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void (*arch_isaoutb)(int port, int value);
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/*
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* Interface to adjust the load address according to the "object"
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* being loaded.
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*/
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uint64_t (*arch_loadaddr)(u_int type, void *data, uint64_t addr);
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#define LOAD_ELF 1 /* data points to the ELF header. */
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#define LOAD_RAW 2 /* data points to the file name. */
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/*
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* Interface to inform MD code about a loaded (ELF) segment. This
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* can be used to flush caches and/or set up translations.
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*/
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#ifdef __elfN
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void (*arch_loadseg)(Elf_Ehdr *eh, Elf_Phdr *ph, uint64_t delta);
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#else
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void (*arch_loadseg)(void *eh, void *ph, uint64_t delta);
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#endif
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/* Probe ZFS pool(s), if needed. */
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void (*arch_zfs_probe)(void);
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/* For kexec-type loaders, get ksegment structure */
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void (*arch_kexec_kseg_get)(int *nseg, void **kseg);
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};
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extern struct arch_switch archsw;
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/* This must be provided by the MD code, but should it be in the archsw? */
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void delay(int delay);
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void dev_cleanup(void);
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time_t time(time_t *tloc);
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#ifndef CTASSERT /* Allow lint to override */
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#define CTASSERT(x) _CTASSERT(x, __LINE__)
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#define _CTASSERT(x, y) __CTASSERT(x, y)
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#define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1]
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#endif
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#endif /* !_BOOTSTRAP_H_ */
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