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freebsd_amp_hwpstate
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Set $currdev according to our best guess at the BIOS device that the previous 

bootstrap loaded us from.
This commit is contained in:
Mike Smith 1998-10-02 16:33:43 +00:00
parent 6b15efd961
commit 41e43bf627
1 changed files with 42 additions and 34 deletions
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76
sys/boot/i386/loader/main.c
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@ -23,7 +23,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: main.c,v 1.7 1998/09/26 01:31:10 msmith Exp $
* $Id: main.c,v 1.8 1998/09/28 20:17:05 peter Exp $
*/
/*
@ -55,6 +55,8 @@ struct bootinfo *initial_bootinfo;
struct arch_switch archsw; /* MI/MD interface boundary */
static void extract_currdev(void);
/* from vers.c */
extern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[];
@ -64,7 +66,6 @@ extern char end[];
void
main(void)
{
struct i386_devdesc currdev;
int i;
/* Pick up arguments */
@ -106,18 +107,8 @@ main(void)
printf("using %d bytes of stack at %p\n", (&stacktop - &stackbase), &stacktop);
#endif
/* We're booting from a BIOS disk, try to spiff this */
currdev.d_dev = devsw[0]; /* XXX presumes that biosdisk is first in devsw */
currdev.d_type = currdev.d_dev->dv_type;
currdev.d_kind.biosdisk.unit = 0; /* XXX wrong, need to get from bootinfo etc. */
currdev.d_kind.biosdisk.slice = -1; /* XXX should be able to detect this, default to autoprobe */
currdev.d_kind.biosdisk.partition = 0; /* default to 'a' */
/* Create i386-specific variables */
env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&currdev), i386_setcurrdev, env_nounset);
env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&currdev), env_noset, env_nounset);
setenv("LINES", "24", 1); /* optional */
extract_currdev(); /* set $currdev and $loaddev */
setenv("LINES", "24", 1); /* optional */
archsw.arch_autoload = i386_autoload;
archsw.arch_getdev = i386_getdev;
@ -133,6 +124,43 @@ main(void)
interact(); /* doesn't return */
}
/*
* 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 currdev;
int major, biosdev, i;
/* We're booting from a BIOS disk, try to spiff this */
currdev.d_dev = devsw[0]; /* XXX presumes that biosdisk is first in devsw */
currdev.d_type = currdev.d_dev->dv_type;
currdev.d_kind.biosdisk.slice = (B_ADAPTOR(kargs->bootdev) << 4) + B_CONTROLLER(kargs->bootdev) - 1;
currdev.d_kind.biosdisk.partition = B_PARTITION(kargs->bootdev);
biosdev = initial_bootinfo->bi_bios_dev;
major = B_TYPE(kargs->bootdev);
/*
* If we are booted by an old bootstrap, we have to guess at the BIOS
* unit number. We will loose if there is more than one disk type
* and we are not booting from the lowest-numbered disk type.
*/
if ((biosdev == 0) && (major != 2)) /* biosdev doesn't match major */
biosdev = 0x80 + B_UNIT(kargs->bootdev); /* assume harddisk */
if ((currdev.d_kind.biosdisk.unit = bd_bios2unit(biosdev)) == -1) {
printf("Can't work out which disk we are booting from, defaulting to disk0:\n");
currdev.d_kind.biosdisk.unit;
}
env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&currdev), i386_setcurrdev, env_nounset);
env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&currdev), env_noset, env_nounset);
}
COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot);
static int
@ -151,26 +179,6 @@ exit(int code)
__exit(code);
}
#if 0 /* XXX learn to ask BTX */
COMMAND_SET(stack, "stack", "show stack usage", command_stack);
extern char stackbase, stacktop;
static int
command_stack(int argc, char *argv[])
{
char *cp;
for (cp = &stackbase; cp < &stacktop; cp++)
if (*cp != 0)
break;
printf("%d bytes of stack used\n", &stacktop - cp);
return(CMD_OK);
}
#endif
COMMAND_SET(heap, "heap", "show heap usage", command_heap);
static int