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head/sys/boot/pc98/loader/main.c
Property | Old Value | New Value |
---|---|---|
svn:keywords | null | FreeBSD=%H \ No newline at end of property |
/*- | |||||
* 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. | |||||
*/ | |||||
#include <sys/cdefs.h> | |||||
__FBSDID("$FreeBSD$"); | |||||
/* | |||||
* MD bootstrap main() and assorted miscellaneous | |||||
* commands. | |||||
*/ | |||||
#include <stand.h> | |||||
#include <stddef.h> | |||||
#include <string.h> | |||||
#include <machine/bootinfo.h> | |||||
#include <machine/cpufunc.h> | |||||
#include <sys/param.h> | |||||
#include <sys/reboot.h> | |||||
#include "bootstrap.h" | |||||
#include "common/bootargs.h" | |||||
#include "libi386/libi386.h" | |||||
#include "libpc98/libpc98.h" | |||||
#include "btxv86.h" | |||||
CTASSERT(sizeof(struct bootargs) == BOOTARGS_SIZE); | |||||
CTASSERT(offsetof(struct bootargs, bootinfo) == BA_BOOTINFO); | |||||
CTASSERT(offsetof(struct bootargs, bootflags) == BA_BOOTFLAGS); | |||||
CTASSERT(offsetof(struct bootinfo, bi_size) == BI_SIZE); | |||||
/* Arguments passed in from the boot1/boot2 loader */ | |||||
static struct bootargs *kargs; | |||||
static u_int32_t initial_howto; | |||||
static u_int32_t initial_bootdev; | |||||
static struct bootinfo *initial_bootinfo; | |||||
struct arch_switch archsw; /* MI/MD interface boundary */ | |||||
static void extract_currdev(void); | |||||
static int isa_inb(int port); | |||||
static void isa_outb(int port, int value); | |||||
void exit(int code); | |||||
/* from vers.c */ | |||||
extern char bootprog_info[]; | |||||
/* XXX debugging */ | |||||
extern char end[]; | |||||
static void *heap_top; | |||||
static void *heap_bottom; | |||||
static uint64_t | |||||
pc98_loadaddr(u_int type, void *data, uint64_t addr) | |||||
{ | |||||
struct stat st; | |||||
if (type == LOAD_ELF) | |||||
return (roundup(addr, PAGE_SIZE)); | |||||
/* We cannot use 15M-16M area on pc98. */ | |||||
if (type == LOAD_RAW && addr < 0x1000000 && stat(data, &st) == 0 && | |||||
(st.st_size == -1 || addr + st.st_size > 0xf00000)) | |||||
addr = 0x1000000; | |||||
return (addr); | |||||
} | |||||
int | |||||
main(void) | |||||
{ | |||||
int i; | |||||
/* Set machine type to PC98_SYSTEM_PARAMETER. */ | |||||
set_machine_type(); | |||||
/* Pick up arguments */ | |||||
kargs = (void *)__args; | |||||
initial_howto = kargs->howto; | |||||
initial_bootdev = kargs->bootdev; | |||||
initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; | |||||
/* Initialize the v86 register set to a known-good state. */ | |||||
bzero(&v86, sizeof(v86)); | |||||
v86.efl = PSL_RESERVED_DEFAULT | PSL_I; | |||||
/* | |||||
* Initialise the heap as early as possible. Once this is done, malloc() is usable. | |||||
*/ | |||||
bios_getmem(); | |||||
#if defined(LOADER_BZIP2_SUPPORT) | |||||
if (high_heap_size > 0) { | |||||
heap_top = PTOV(high_heap_base + high_heap_size); | |||||
heap_bottom = PTOV(high_heap_base); | |||||
if (high_heap_base < memtop_copyin) | |||||
memtop_copyin = high_heap_base; | |||||
} else | |||||
#endif | |||||
{ | |||||
heap_top = (void *)PTOV(bios_basemem); | |||||
heap_bottom = (void *)end; | |||||
} | |||||
setheap(heap_bottom, heap_top); | |||||
/* | |||||
* XXX Chicken-and-egg problem; we want to have console output early, but some | |||||
* console attributes may depend on reading from eg. the boot device, which we | |||||
* can't do yet. | |||||
* | |||||
* We can use printf() etc. once this is done. | |||||
* If the previous boot stage has requested a serial console, prefer that. | |||||
*/ | |||||
bi_setboothowto(initial_howto); | |||||
if (initial_howto & RB_MULTIPLE) { | |||||
if (initial_howto & RB_SERIAL) | |||||
setenv("console", "comconsole vidconsole", 1); | |||||
else | |||||
setenv("console", "vidconsole comconsole", 1); | |||||
} else if (initial_howto & RB_SERIAL) | |||||
setenv("console", "comconsole", 1); | |||||
else if (initial_howto & RB_MUTE) | |||||
setenv("console", "nullconsole", 1); | |||||
cons_probe(); | |||||
/* | |||||
* Initialise the block cache. Set the upper limit. | |||||
*/ | |||||
bcache_init(32768, 512); | |||||
/* | |||||
* Special handling for PXE and CD booting. | |||||
*/ | |||||
if (kargs->bootinfo == 0) { | |||||
/* | |||||
* We only want the PXE disk to try to init itself in the below | |||||
* walk through devsw if we actually booted off of PXE. | |||||
*/ | |||||
if (kargs->bootflags & KARGS_FLAGS_PXE) | |||||
pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); | |||||
else if (kargs->bootflags & KARGS_FLAGS_CD) | |||||
bc_add(initial_bootdev); | |||||
} | |||||
archsw.arch_autoload = i386_autoload; | |||||
archsw.arch_getdev = i386_getdev; | |||||
archsw.arch_copyin = i386_copyin; | |||||
archsw.arch_copyout = i386_copyout; | |||||
archsw.arch_readin = i386_readin; | |||||
archsw.arch_isainb = isa_inb; | |||||
archsw.arch_isaoutb = isa_outb; | |||||
archsw.arch_loadaddr = pc98_loadaddr; | |||||
/* | |||||
* March through the device switch probing for things. | |||||
*/ | |||||
for (i = 0; devsw[i] != NULL; i++) | |||||
if (devsw[i]->dv_init != NULL) | |||||
(devsw[i]->dv_init)(); | |||||
printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); | |||||
if (initial_bootinfo != NULL) { | |||||
initial_bootinfo->bi_basemem = bios_basemem / 1024; | |||||
initial_bootinfo->bi_extmem = bios_extmem / 1024; | |||||
} | |||||
printf("\n%s", bootprog_info); | |||||
extract_currdev(); /* set $currdev and $loaddev */ | |||||
setenv("LINES", "24", 1); /* optional */ | |||||
interact(NULL); /* doesn't return */ | |||||
/* if we ever get here, it is an error */ | |||||
return (1); | |||||
} | |||||
/* | |||||
* Set the 'current device' by (if possible) recovering the boot device as | |||||
* supplied by the initial bootstrap. | |||||
* | |||||
* XXX should be extended for netbooting. | |||||
*/ | |||||
static void | |||||
extract_currdev(void) | |||||
{ | |||||
struct i386_devdesc new_currdev; | |||||
int major; | |||||
int biosdev = -1; | |||||
/* Assume we are booting from a BIOS disk by default */ | |||||
new_currdev.d_dev = &biosdisk; | |||||
/* new-style boot loaders such as pxeldr and cdldr */ | |||||
if (kargs->bootinfo == 0) { | |||||
if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { | |||||
/* we are booting from a CD with cdboot */ | |||||
new_currdev.d_dev = &bioscd; | |||||
new_currdev.d_unit = bc_bios2unit(initial_bootdev); | |||||
} else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { | |||||
/* we are booting from pxeldr */ | |||||
new_currdev.d_dev = &pxedisk; | |||||
new_currdev.d_unit = 0; | |||||
} else { | |||||
/* we don't know what our boot device is */ | |||||
new_currdev.d_kind.biosdisk.slice = -1; | |||||
new_currdev.d_kind.biosdisk.partition = 0; | |||||
biosdev = -1; | |||||
} | |||||
} else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { | |||||
/* The passed-in boot device is bad */ | |||||
new_currdev.d_kind.biosdisk.slice = -1; | |||||
new_currdev.d_kind.biosdisk.partition = 0; | |||||
biosdev = -1; | |||||
} else { | |||||
new_currdev.d_kind.biosdisk.slice = B_SLICE(initial_bootdev) - 1; | |||||
new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); | |||||
biosdev = initial_bootinfo->bi_bios_dev; | |||||
major = B_TYPE(initial_bootdev); | |||||
/* | |||||
* If we are booted by an old bootstrap, we have to guess at the BIOS | |||||
* unit number. We will lose if there is more than one disk type | |||||
* and we are not booting from the lowest-numbered disk type | |||||
* (ie. SCSI when IDE also exists). | |||||
*/ | |||||
if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) { /* biosdev doesn't match major */ | |||||
if (B_TYPE(initial_bootdev) == 6) | |||||
biosdev = 0x30 + B_UNIT(initial_bootdev); | |||||
else | |||||
biosdev = (major << 3) + 0x80 + B_UNIT(initial_bootdev); | |||||
} | |||||
} | |||||
new_currdev.d_type = new_currdev.d_dev->dv_type; | |||||
/* | |||||
* If we are booting off of a BIOS disk and we didn't succeed in determining | |||||
* which one we booted off of, just use disk0: as a reasonable default. | |||||
*/ | |||||
if ((new_currdev.d_type == biosdisk.dv_type) && | |||||
((new_currdev.d_unit = bd_bios2unit(biosdev)) == -1)) { | |||||
printf("Can't work out which disk we are booting from.\n" | |||||
"Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); | |||||
new_currdev.d_unit = 0; | |||||
} | |||||
env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev), | |||||
i386_setcurrdev, env_nounset); | |||||
env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset, | |||||
env_nounset); | |||||
} | |||||
COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); | |||||
static int | |||||
command_reboot(int argc, char *argv[]) | |||||
{ | |||||
int i; | |||||
for (i = 0; devsw[i] != NULL; ++i) | |||||
if (devsw[i]->dv_cleanup != NULL) | |||||
(devsw[i]->dv_cleanup)(); | |||||
printf("Rebooting...\n"); | |||||
delay(1000000); | |||||
__exit(0); | |||||
} | |||||
/* provide this for panic, as it's not in the startup code */ | |||||
void | |||||
exit(int code) | |||||
{ | |||||
__exit(code); | |||||
} | |||||
COMMAND_SET(heap, "heap", "show heap usage", command_heap); | |||||
static int | |||||
command_heap(int argc, char *argv[]) | |||||
{ | |||||
mallocstats(); | |||||
printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom, | |||||
sbrk(0), heap_top); | |||||
return(CMD_OK); | |||||
} | |||||
/* ISA bus access functions for PnP. */ | |||||
static int | |||||
isa_inb(int port) | |||||
{ | |||||
return (inb(port)); | |||||
} | |||||
static void | |||||
isa_outb(int port, int value) | |||||
{ | |||||
outb(port, value); | |||||
} |