801e789e01
Add support for module metadata. The old way of dependancy handling will be supported for a while. Reviewed by: peter
317 lines
10 KiB
C
317 lines
10 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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#include <sys/types.h>
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#include <sys/queue.h>
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/* XXX debugging */
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extern struct console vidconsole;
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#define MARK(s, c) {vidconsole.c_out(s); vidconsole.c_out(c); while (!vidconsole.c_ready()) ; vidconsole.c_in();}
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/*
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* Generic device specifier; architecture-dependant
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* versions may be larger, but should be allowed to
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* overlap.
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*/
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struct devdesc
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{
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struct devsw *d_dev;
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int d_type;
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#define DEVT_NONE 0
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#define DEVT_DISK 1
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#define DEVT_NET 2
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};
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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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extern char *command_errmsg;
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extern char command_errbuf[]; /* XXX blah, length */
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#define CMD_OK 0
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#define CMD_ERROR 1
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/* interp.c */
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extern void interact(void);
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extern int include(char *filename);
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/* interp_parse.c */
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extern int parse(int *argc, char ***argv, char *str);
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/* interp_forth.c */
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extern void bf_init(void);
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extern int bf_run(char *line);
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/* boot.c */
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extern int autoboot(int delay, char *prompt);
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extern void autoboot_maybe(void);
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extern int getrootmount(char *rootdev);
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/* misc.c */
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extern char *unargv(int argc, char *argv[]);
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extern void hexdump(caddr_t region, size_t len);
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extern size_t strlenout(vm_offset_t str);
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extern char *strdupout(vm_offset_t str);
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/* bcache.c */
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extern int bcache_init(int nblks, size_t bsize);
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extern void bcache_flush();
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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, size_t size, void *buf, size_t *rsize);
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void *dv_devdata;
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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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char *c_name;
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char *c_desc;
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int c_flags;
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#define C_PRESENTIN (1<<0)
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#define C_PRESENTOUT (1<<1)
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#define C_ACTIVEIN (1<<2)
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#define C_ACTIVEOUT (1<<3)
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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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extern 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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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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extern struct pnphandler *pnphandlers[]; /* provided by MD code */
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extern void pnp_addident(struct pnpinfo *pi, char *ident);
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extern struct pnpinfo *pnp_allocinfo(void);
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extern void pnp_freeinfo(struct pnpinfo *pi);
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extern void pnp_addinfo(struct pnpinfo *pi);
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extern 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[0]; /* data are immediately appended */
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};
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struct preloaded_file;
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struct kernel_module
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{
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char *m_name; /* module name */
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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, vm_offset_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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extern int mod_load(char *name, int argc, char *argv[]);
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extern int mod_loadobj(char *type, char *name);
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struct preloaded_file *file_alloc(void);
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struct preloaded_file *file_findfile(char *name, char *type);
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struct file_metadata *file_findmetadata(struct preloaded_file *fp, int type);
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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,
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struct kernel_module **newmp);
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/* MI module loaders */
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extern int aout_loadfile(char *filename, vm_offset_t dest, struct preloaded_file **result);
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extern vm_offset_t aout_findsym(char *name, struct preloaded_file *fp);
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extern int elf_loadfile(char *filename, vm_offset_t dest, struct preloaded_file **result);
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#ifndef NEW_LINKER_SET
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#include <sys/linker_set.h>
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/* XXX just for conversion's sake, until we move to the new linker set code */
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#define SET_FOREACH(pvar, set) \
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for ((char*) pvar = set.ls_items; \
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(char*) pvar < (char*) &set.ls_items[set.ls_length]; \
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pvar++)
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#else /* NEW_LINKER_SET */
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/*
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* Private macros, not to be used outside this header file.
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*/
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#define __MAKE_SET(set, sym) \
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static void *__CONCAT(__setentry,__LINE__) \
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__attribute__((__section__("set_" #set),__unused__)) = &sym
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#define __SET_BEGIN(set) \
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({ extern void *__CONCAT(__start_set_,set); \
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&__CONCAT(__start_set_,set); })
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#define __SET_END(set) \
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({ extern void *__CONCAT(__stop_set_,set); \
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&__CONCAT(__stop_set_,set); })
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/*
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* Public macros.
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*/
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/* Add an entry to a set. */
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#define DATA_SET(set, sym) __MAKE_SET(set, sym)
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/*
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* Iterate over all the elements of a set.
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*
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* Sets always contain addresses of things, and "pvar" points to words
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* containing those addresses. Thus is must be declared as "type **pvar",
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* and the address of each set item is obtained inside the loop by "*pvar".
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*/
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#define SET_FOREACH(pvar, set) \
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for (pvar = (__typeof__(pvar))__SET_BEGIN(set); \
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pvar < (__typeof__(pvar))__SET_END(set); pvar++)
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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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extern struct linker_set Xcommand_set;
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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)();
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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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int (*arch_copyin)(void *src, vm_offset_t dest, size_t len);
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/* Copy to local address space from module address space, similar to bcopy() */
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int (*arch_copyout)(vm_offset_t src, void *dest, size_t len);
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/* Read from file to module address space, same semantics as read() */
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int (*arch_readin)(int fd, vm_offset_t dest, 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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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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extern void delay(int delay);
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