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Code Issues Releases Activity

Improve the handling of the initial bootdev value from the previous loader.

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Remove some unused code.
This commit is contained in:
Mike Smith 1998-10-04 09:12:54 +00:00
parent 58b7e8766e
commit 7546830370
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=39944
1 changed files with 35 additions and 28 deletions
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63
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 1.9 1998/10/02 16:33:43 msmith Exp $
* $Id: main.c,v 1.10 1998/10/03 18:27:50 rnordier Exp $
*/
/*
@ -51,7 +51,9 @@ static struct
u_int32_t bootinfo;
} *kargs;
struct bootinfo *initial_bootinfo;
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 */
@ -70,6 +72,8 @@ main(void)
/* Pick up arguments */
kargs = (void *)__args;
initial_howto = kargs->howto;
initial_bootdev = kargs->bootdev;
initial_bootinfo = (struct bootinfo *)PTOV(kargs->bootinfo);
/*
@ -87,7 +91,7 @@ main(void)
* We can use printf() etc. once this is done.
* If the previous boot stage has requested a serial console, prefer that.
*/
if (kargs->howto & RB_SERIAL)
if (initial_howto & RB_SERIAL)
setenv("console", "comconsole", 1);
cons_probe();
@ -99,12 +103,11 @@ main(void)
(devsw[i]->dv_init)();
printf("\n");
printf("%s, Revision %s\n", bootprog_name, bootprog_rev);
printf("%s, Revision %s %d/%dkB\n", bootprog_name, bootprog_rev, getbasemem(), getextmem());
printf("(%s, %s)\n", bootprog_maker, bootprog_date);
printf("memory: %d/%dkB\n", getbasemem(), getextmem());
#if 0
printf("diskbuf at %p, %d sectors\n", &diskbuf, diskbuf_size);
printf("using %d bytes of stack at %p\n", (&stacktop - &stackbase), &stacktop);
printf("recovered args howto = 0x%x bootdev = 0x%x bootinfo = %p\n",
initial_howto, initial_bootdev, initial_bootinfo);
#endif
extract_currdev(); /* set $currdev and $loaddev */
@ -115,12 +118,7 @@ main(void)
archsw.arch_copyin = i386_copyin;
archsw.arch_copyout = i386_copyout;
archsw.arch_readin = i386_readin;
/*
* XXX should these be in the MI source?
*/
#if 0
legacy_config(); /* read old /boot.config file */
#endif
interact(); /* doesn't return */
}
@ -134,28 +132,37 @@ static void
extract_currdev(void)
{
struct i386_devdesc currdev;
int major, biosdev, i;
int major, biosdev;
/* 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 ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) {
/* The passed-in boot device is bad */
currdev.d_kind.biosdisk.slice = -1;
currdev.d_kind.biosdisk.partition = 0;
biosdev = -1;
} else {
currdev.d_kind.biosdisk.slice = (B_ADAPTOR(initial_bootdev) << 4) + B_CONTROLLER(initial_bootdev) - 1;
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 loose 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 */
biosdev = 0x80 + B_UNIT(initial_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;
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);
currdev.d_kind.biosdisk.unit = 0;
}
env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&currdev), i386_setcurrdev, env_nounset);
env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&currdev), env_noset, env_nounset);