c2f9d95de5
'three-stage' bootstrap. There are a number of caveats with the code in its current state: - The i386 bootstrap only supports booting from a floppy. - The kernel and kld do not yet know how to deal with the extended information and module summary passed in. - PnP-based autodetection and demand loading of modules is not implemented. - i386 ELF kernel loading is not ready yet. - The i386 bootstrap is loaded via an ugly blockmap. On the alpha, both net- and disk-booting (SRM console machines only) is supported. No blockmaps are used by this code. Obtained from: Parts from the NetBSD/i386 standalone bootstrap.
227 lines
6.8 KiB
C
227 lines
6.8 KiB
C
/*-
|
|
* 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.
|
|
*
|
|
* $Id$
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
|
|
/* XXX debugging */
|
|
extern struct console vidconsole;
|
|
#define MARK(s, c) {vidconsole.c_out(s); vidconsole.c_out(c); while (!vidconsole.c_ready()) ; vidconsole.c_in();}
|
|
|
|
/*
|
|
* 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
|
|
};
|
|
|
|
/* 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 */
|
|
extern void interact(void);
|
|
extern void source(char *filename);
|
|
|
|
/* boot.c */
|
|
extern int autoboot(int delay, char *prompt);
|
|
|
|
/* misc.c */
|
|
extern char *unargv(int argc, char *argv[]);
|
|
|
|
/*
|
|
* Modular console support.
|
|
*/
|
|
struct console
|
|
{
|
|
char *c_name;
|
|
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[];
|
|
extern void cons_probe(void);
|
|
|
|
/*
|
|
* Module loader.
|
|
*/
|
|
#define MF_FORMATMASK 0xf
|
|
#define MF_AOUT 0
|
|
#define MF_ELF 1
|
|
|
|
/*
|
|
* Module metadata header.
|
|
*
|
|
* Metadata are allocated on our heap, and copied into kernel space
|
|
* before executing the kernel.
|
|
*/
|
|
struct module_metadata
|
|
{
|
|
size_t md_size;
|
|
u_int16_t md_type;
|
|
struct module_metadata *md_next;
|
|
char md_data[0]; /* data are immediately appended */
|
|
};
|
|
|
|
/*
|
|
* Loaded module information.
|
|
*
|
|
* At least one module (the kernel) must be loaded in order to boot.
|
|
* The kernel is always loaded first.
|
|
*/
|
|
struct loaded_module
|
|
{
|
|
char *m_name; /* module name */
|
|
char *m_type; /* module type, eg 'kernel', 'pnptable', etc. */
|
|
char *m_args; /* arguments for the module */
|
|
void *m_metadata; /* metadata that will be placed in the module directory */
|
|
int m_flags; /* 0xffff reserved for arch-specific use */
|
|
vm_offset_t m_addr; /* load address */
|
|
size_t m_size; /* module size */
|
|
struct loaded_module *m_next; /* next module */
|
|
};
|
|
|
|
struct module_format
|
|
{
|
|
int l_format;
|
|
/* Load function must return EFTYPE if it can't handle the module supplied */
|
|
int (* l_load)(char *filename, vm_offset_t dest, struct loaded_module **result);
|
|
int (* l_exec)(struct loaded_module *amp);
|
|
};
|
|
extern struct module_format *module_formats[]; /* supplied by consumer */
|
|
extern struct loaded_module *loaded_modules;
|
|
extern int mod_load(char *name, int argc, char *argv[]);
|
|
extern struct loaded_module *mod_findmodule(char *name, char *type);
|
|
|
|
/* XXX these belong in <machine/bootinfo.h> */
|
|
#define MODINFO_NAME 0x0000
|
|
#define MODINFO_TYPE 0x0001
|
|
#define MODINFO_ADDR 0x0002
|
|
#define MODINFO_SIZE 0x0003
|
|
#define MODINFO_METADATA 0x8000
|
|
|
|
|
|
#if defined(__ELF__)
|
|
|
|
/*
|
|
* Alpha GAS needs an align before the section change. It seems to assume
|
|
* that after the .previous, it is aligned, so the following .align 3 is
|
|
* ignored. Since the previous instructions often contain strings, this is
|
|
* a problem.
|
|
*/
|
|
|
|
#ifdef __alpha__
|
|
#define MAKE_SET(set, sym) \
|
|
__asm(".align 3"); \
|
|
__asm(".section .set." #set ",\"aw\""); \
|
|
__asm(".quad " #sym); \
|
|
__asm(".previous")
|
|
#else
|
|
#define MAKE_SET(set, sym) \
|
|
__asm(".section .set." #set ",\"aw\""); \
|
|
__asm(".long " #sym); \
|
|
__asm(".previous")
|
|
#endif
|
|
#define TEXT_SET(set, sym) MAKE_SET(set, sym)
|
|
#define DATA_SET(set, sym) MAKE_SET(set, sym)
|
|
#define BSS_SET(set, sym) MAKE_SET(set, sym)
|
|
#define ABS_SET(set, sym) MAKE_SET(set, sym)
|
|
|
|
#else
|
|
|
|
/*
|
|
* Linker set support, directly from <sys/kernel.h>
|
|
*
|
|
* NB: the constants defined below must match those defined in
|
|
* ld/ld.h. Since their calculation requires arithmetic, we
|
|
* can't name them symbolically (e.g., 23 is N_SETT | N_EXT).
|
|
*/
|
|
#define MAKE_SET(set, sym, type) \
|
|
static void const * const __set_##set##_sym_##sym = &sym; \
|
|
__asm(".stabs \"_" #set "\", " #type ", 0, 0, _" #sym)
|
|
#define TEXT_SET(set, sym) MAKE_SET(set, sym, 23)
|
|
#define DATA_SET(set, sym) MAKE_SET(set, sym, 25)
|
|
#define BSS_SET(set, sym) MAKE_SET(set, sym, 27)
|
|
#define ABS_SET(set, sym) MAKE_SET(set, sym, 21)
|
|
|
|
#endif
|
|
|
|
struct linker_set {
|
|
int ls_length;
|
|
const void *ls_items[1]; /* really ls_length of them, trailing NULL */
|
|
};
|
|
|
|
/*
|
|
* 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);
|
|
|
|
extern struct linker_set Xcommand_set;
|
|
|
|
/*
|
|
* functions called down from the generic code
|
|
*/
|
|
struct arch_switch
|
|
{
|
|
/* Automatically load modules as required by detected hardware */
|
|
int (* arch_autoload)();
|
|
/* Boot the loaded kernel (first loaded module) */
|
|
int (* arch_boot)(void);
|
|
/* Locate the device for (name), return pointer to tail in (*path) */
|
|
int (*arch_getdev)(void **dev, char *name, char **path);
|
|
};
|
|
extern struct arch_switch archsw;
|
|
|