4.4BSD/usr/src/sys/vax/stand/boot.c
/*-
* Copyright (c) 1982, 1986 The Regents of the University of California.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)boot.c 7.15 (Berkeley) 5/4/91
*/
#include "sys/param.h"
#include "sys/vm.h"
#include "sys/reboot.h"
#include <a.out.h>
#include "stand/saio.h"
/*
* Boot program... arguments passed in r10 and r11 determine
* whether boot stops to ask for system name and which device
* boot comes from.
*/
char line[100];
extern unsigned opendev;
main()
{
register unsigned howto, devtype; /* howto=r11, devtype=r10 */
int io = 0, retry, type;
#ifdef lint
howto = 0; devtype = 0;
#endif
#ifdef JUSTASK
howto = RB_ASKNAME|RB_SINGLE;
#else
if ((howto & RB_ASKNAME) == 0) {
type = (devtype >> B_TYPESHIFT) & B_TYPEMASK;
if ((unsigned)type < ndevs && devsw[type].dv_name)
strcpy(line, UNIX);
else
howto |= RB_SINGLE|RB_ASKNAME;
}
#endif
for (retry = 0;;) {
if (io >= 0)
printf("\nBoot\n");
if (howto & RB_ASKNAME) {
printf(": ");
gets(line);
if (line[0] == 0) {
strcpy(line, UNIX);
printf(": %s\n", line);
}
} else
printf(": %s\n", line);
io = open(line, 0);
if (io >= 0) {
#ifdef VAX750
loadpcs();
#endif
copyunix(howto, opendev, io);
close(io);
howto |= RB_SINGLE|RB_ASKNAME;
}
if (++retry > 2)
howto |= RB_SINGLE|RB_ASKNAME;
}
}
/*ARGSUSED*/
copyunix(howto, devtype, aio)
register howto, devtype; /* howto=r11, devtype=r10 */
int aio;
{
register int esym; /* must be r9 */
struct exec x;
register int io = aio, i;
char *addr;
if (read(io, (char *)&x, sizeof(x)) != sizeof(x) || N_BADMAG(x)) {
printf("Bad format\n");
return;
}
printf("%d", x.a_text);
if (x.a_magic == ZMAGIC && lseek(io, 0x400, L_SET) == -1)
goto shread;
if (read(io, (char *)0, x.a_text) != x.a_text)
goto shread;
addr = (char *)x.a_text;
if (x.a_magic == ZMAGIC || x.a_magic == NMAGIC)
while ((int)addr & CLOFSET)
*addr++ = 0;
printf("+%d", x.a_data);
if (read(io, addr, x.a_data) != x.a_data)
goto shread;
addr += x.a_data;
printf("+%d", x.a_bss);
for (i = 0; i < x.a_bss; i++)
*addr++ = 0;
if (howto & RB_KDB && x.a_syms) {
*(int *)addr = x.a_syms; /* symbol table size */
addr += sizeof (int);
printf("[+%d", x.a_syms);
if (read(io, addr, x.a_syms) != x.a_syms)
goto shread;
addr += x.a_syms;
if (read(io, addr, sizeof (int)) != sizeof (int))
goto shread;
i = *(int *)addr - sizeof (int); /* string table size */
addr += sizeof (int);
printf("+%d]", i);
if (read(io, addr, i) != i)
goto shread;
addr += i;
esym = roundup((int)addr, sizeof (int));
x.a_bss = 0;
} else
howto &= ~RB_KDB;
for (i = 0; i < 128*512; i++) /* slop */
*addr++ = 0;
x.a_entry &= 0x7fffffff;
printf(" start 0x%x\n", x.a_entry);
(*((int (*)()) x.a_entry))();
return;
shread:
printf("Short read\n");
return;
}
#ifdef VAX750
/* 750 Patchable Control Store magic */
#include "../include/mtpr.h"
#include "../include/cpu.h"
#define PCS_BITCNT 0x2000 /* number of patchbits */
#define PCS_MICRONUM 0x400 /* number of ucode locs */
#define PCS_PATCHADDR 0xf00000 /* start addr of patchbits */
#define PCS_PCSADDR (PCS_PATCHADDR+0x8000) /* start addr of pcs */
#define PCS_PATCHBIT (PCS_PATCHADDR+0xc000) /* patchbits enable reg */
#define PCS_ENABLE 0xfff00000 /* enable bits for pcs */
loadpcs()
{
register int *ip; /* known to be r11 below */
register int i; /* known to be r10 below */
register int *jp; /* known to be r9 below */
register int j;
static int pcsdone = 0;
union cpusid sid;
char pcs[100];
char *cp;
sid.cpusid = mfpr(SID);
if (sid.cpuany.cp_type!=VAX_750 || sid.cpu750.cp_urev<95 || pcsdone)
return;
printf("Updating 11/750 microcode: ");
for (cp = line; *cp; cp++)
if (*cp == ')' || *cp == ':')
break;
if (*cp) {
strncpy(pcs, line, 99);
pcs[99] = 0;
i = cp - line + 1;
} else
i = 0;
strcpy(pcs + i, "pcs750.bin");
i = open(pcs, 0);
if (i < 0)
return;
/*
* We ask for more than we need to be sure we get only what we expect.
* After read:
* locs 0 - 1023 packed patchbits
* 1024 - 11264 packed microcode
*/
if (read(i, (char *)0, 23*512) != 22*512) {
printf("Error reading %s\n", pcs);
close(i);
return;
}
close(i);
/*
* Enable patchbit loading and load the bits one at a time.
*/
*((int *)PCS_PATCHBIT) = 1;
ip = (int *)PCS_PATCHADDR;
jp = (int *)0;
for (i=0; i < PCS_BITCNT; i++) {
asm(" extzv r10,$1,(r9),(r11)+");
}
*((int *)PCS_PATCHBIT) = 0;
/*
* Load PCS microcode 20 bits at a time.
*/
ip = (int *)PCS_PCSADDR;
jp = (int *)1024;
for (i=j=0; j < PCS_MICRONUM * 4; i+=20, j++) {
asm(" extzv r10,$20,(r9),(r11)+");
}
/*
* Enable PCS.
*/
i = *jp; /* get 1st 20 bits of microcode again */
i &= 0xfffff;
i |= PCS_ENABLE; /* reload these bits with PCS enable set */
*((int *)PCS_PCSADDR) = i;
sid.cpusid = mfpr(SID);
printf("new rev level=%d\n", sid.cpu750.cp_urev);
pcsdone = 1;
}
#endif