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NetBSD/sys/arch/hp300/hp300/machdep.c

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/* $NetBSD: machdep.c,v 1.142 2000/06/29 08:23:03 mrg Exp $ */
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1986, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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.
*
* from: Utah $Hdr: machdep.c 1.74 92/12/20$
*
* @(#)machdep.c 8.10 (Berkeley) 4/20/94
*/
#include "opt_ddb.h"
#include "opt_compat_hpux.h"
#include "opt_compat_netbsd.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/buf.h>
#include <sys/clist.h>
#include <sys/conf.h>
#include <sys/exec.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/map.h>
#include <sys/mbuf.h>
#include <sys/mount.h>
#include <sys/msgbuf.h>
#include <sys/proc.h>
#include <sys/reboot.h>
#include <sys/signalvar.h>
#include <sys/syscallargs.h>
#include <sys/tty.h>
#include <sys/user.h>
#include <sys/exec.h>
#include <sys/core.h>
#include <sys/kcore.h>
#include <sys/vnode.h>
#include <machine/db_machdep.h>
#include <ddb/db_sym.h>
#include <ddb/db_extern.h>
#include <machine/autoconf.h>
#include <machine/bootinfo.h>
#include <machine/cpu.h>
#include <machine/hp300spu.h>
#include <machine/reg.h>
#include <machine/psl.h>
#include <machine/pte.h>
#include <machine/kcore.h> /* XXX should be pulled in by sys/kcore.h */
#include <dev/cons.h>
#define MAXMEM 64*1024 /* XXX - from cmap.h */
#include <uvm/uvm_extern.h>
#include <sys/sysctl.h>
#include "opt_useleds.h"
#include <arch/hp300/dev/hilreg.h>
#include <arch/hp300/dev/hilioctl.h>
#include <arch/hp300/dev/hilvar.h>
#ifdef USELEDS
#include <arch/hp300/hp300/leds.h>
#endif
/* the following is used externally (sysctl_hw) */
char machine[] = MACHINE; /* from <machine/param.h> */
/* Our exported CPU info; we can have only one. */
struct cpu_info cpu_info_store;
vm_map_t exec_map = NULL;
vm_map_t mb_map = NULL;
vm_map_t phys_map = NULL;
extern paddr_t avail_end;
/*
* bootinfo base (physical and virtual). The bootinfo is placed, by
* the boot loader, into the first page of kernel text, which is zero
* filled (see locore.s) and not mapped at 0. It is remapped to a
* different address in pmap_bootstrap().
*/
paddr_t bootinfo_pa;
vaddr_t bootinfo_va;
caddr_t msgbufaddr;
int maxmem; /* max memory per process */
int physmem = MAXMEM; /* max supported memory, changes to actual */
/*
* safepri is a safe priority for sleep to set for a spin-wait
* during autoconfiguration or after a panic.
*/
int safepri = PSL_LOWIPL;
extern u_int lowram;
extern short exframesize[];
#ifdef COMPAT_HPUX
extern struct emul emul_hpux;
#endif
/* prototypes for local functions */
void parityenable __P((void));
int parityerror __P((struct frame *));
int parityerrorfind __P((void));
void identifycpu __P((void));
void initcpu __P((void));
int cpu_dumpsize __P((void));
int cpu_dump __P((int (*)(dev_t, daddr_t, caddr_t, size_t), daddr_t *));
void cpu_init_kcore_hdr __P((void));
/* functions called from locore.s */
void dumpsys __P((void));
void hp300_init __P((void));
void straytrap __P((int, u_short));
void nmihand __P((struct frame));
/*
* Machine-dependent crash dump header info.
*/
cpu_kcore_hdr_t cpu_kcore_hdr;
/*
* Select code of console. Set to -1 if console is on
* "internal" framebuffer.
*/
int conscode;
int consinit_active; /* flag for driver init routines */
caddr_t conaddr; /* for drivers in cn_init() */
int convasize; /* size of mapped console device */
int conforced; /* console has been forced */
/*
* Note that the value of delay_divisor is roughly
* 2048 / cpuspeed (where cpuspeed is in MHz) on 68020
* and 68030 systems. See clock.c for the delay
* calibration algorithm.
*/
int cpuspeed; /* relative cpu speed; XXX skewed on 68040 */
int delay_divisor; /* delay constant */
/*
* Early initialization, before main() is called.
*/
void
hp300_init()
{
struct btinfo_magic *bt_mag;
int i;
extern paddr_t avail_start, avail_end;
/*
* Tell the VM system about available physical memory. The
* hp300 only has one segment.
*/
uvm_page_physload(atop(avail_start), atop(avail_end),
atop(avail_start), atop(avail_end), VM_FREELIST_DEFAULT);
/* Initialize the interrupt handlers. */
intr_init();
/* Calibrate the delay loop. */
hp300_calibrate_delay();
/*
* Initialize error message buffer (at end of core).
* avail_end was pre-decremented in pmap_bootstrap to compensate.
*/
for (i = 0; i < btoc(MSGBUFSIZE); i++)
pmap_enter(pmap_kernel(), (vaddr_t)msgbufaddr + i * NBPG,
avail_end + i * NBPG, VM_PROT_READ|VM_PROT_WRITE,
VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED);
initmsgbuf(msgbufaddr, m68k_round_page(MSGBUFSIZE));
/*
* Map in the bootinfo page, and make sure the bootinfo
* exists by searching for the MAGIC record. If it's not
* there, disable bootinfo.
*/
pmap_enter(pmap_kernel(), bootinfo_va, bootinfo_pa,
VM_PROT_READ|VM_PROT_WRITE,
VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED);
bt_mag = lookup_bootinfo(BTINFO_MAGIC);
if (bt_mag == NULL ||
bt_mag->magic1 != BOOTINFO_MAGIC1 ||
bt_mag->magic2 != BOOTINFO_MAGIC2) {
pmap_remove(pmap_kernel(), bootinfo_va, bootinfo_va + NBPG);
bootinfo_va = 0;
}
}
/*
* Console initialization: called early on from main,
* before vm init or startup. Do enough configuration
* to choose and initialize a console.
*/
void
consinit()
{
extern struct map extiomap[];
/*
* Initialize some variables for sanity.
*/
consinit_active = 1;
convasize = 0;
conforced = 0;
conscode = 1024; /* invalid */
/*
* Initialize the DIO resource map.
*/
rminit(extiomap, (long)EIOMAPSIZE, (long)1, "extio", EIOMAPSIZE/16);
/*
* Initialize the console before we print anything out.
*/
hp300_cninit();
consinit_active = 0;
/*
* Issue a warning if the boot loader didn't provide bootinfo.
*/
if (bootinfo_va == 0)
printf("WARNING: boot loader did not provide bootinfo\n");
#ifdef DDB
{
extern int end;
extern int *esym;
ddb_init(*(int *)&end, ((int *)&end) + 1, esym);
}
if (boothowto & RB_KDB)
Debugger();
#endif
}
/*
* cpu_startup: allocate memory for variable-sized tables,
* initialize cpu, and do autoconfiguration.
*/
void
cpu_startup()
{
extern char *etext;
unsigned i;
caddr_t v;
int base, residual;
vaddr_t minaddr, maxaddr;
vsize_t size;
char pbuf[9];
#ifdef DEBUG
extern int pmapdebug;
int opmapdebug = pmapdebug;
pmapdebug = 0;
#endif
/*
* Initialize the kernel crash dump header.
*/
cpu_init_kcore_hdr();
/*
* Good {morning,afternoon,evening,night}.
*/
printf(version);
identifycpu();
format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
printf("total memory = %s\n", pbuf);
/*
* Find out how much space we need, allocate it,
* and the give everything true virtual addresses.
*/
size = (vsize_t)allocsys(NULL, NULL);
if ((v = (caddr_t)uvm_km_zalloc(kernel_map, round_page(size))) == 0)
panic("startup: no room for tables");
if ((allocsys(v, NULL) - v) != size)
panic("startup: table size inconsistency");
/*
* Now allocate buffers proper. They are different than the above
* in that they usually occupy more virtual memory than physical.
*/
size = MAXBSIZE * nbuf;
if (uvm_map(kernel_map, (vaddr_t *) &buffers, round_page(size),
NULL, UVM_UNKNOWN_OFFSET,
UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE,
UVM_ADV_NORMAL, 0)) != KERN_SUCCESS)
panic("startup: cannot allocate VM for buffers");
minaddr = (vaddr_t)buffers;
base = bufpages / nbuf;
residual = bufpages % nbuf;
for (i = 0; i < nbuf; i++) {
vsize_t curbufsize;
vaddr_t curbuf;
struct vm_page *pg;
/*
* Each buffer has MAXBSIZE bytes of VM space allocated. Of
* that MAXBSIZE space, we allocate and map (base+1) pages
* for the first "residual" buffers, and then we allocate
* "base" pages for the rest.
*/
curbuf = (vaddr_t) buffers + (i * MAXBSIZE);
curbufsize = NBPG * ((i < residual) ? (base+1) : base);
while (curbufsize) {
pg = uvm_pagealloc(NULL, 0, NULL, 0);
if (pg == NULL)
panic("cpu_startup: not enough memory for "
"buffer cache");
pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg),
VM_PROT_READ|VM_PROT_WRITE);
curbuf += PAGE_SIZE;
curbufsize -= PAGE_SIZE;
}
}
/*
* Allocate a submap for exec arguments. This map effectively
* limits the number of processes exec'ing at any time.
*/
exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL);
/*
* Allocate a submap for physio
*/
phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
VM_PHYS_SIZE, 0, FALSE, NULL);
/*
* Finally, allocate mbuf cluster submap.
*/
mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
nmbclusters * mclbytes, VM_MAP_INTRSAFE,
FALSE, NULL);
#ifdef DEBUG
pmapdebug = opmapdebug;
#endif
format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
printf("avail memory = %s\n", pbuf);
format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG);
printf("using %d buffers containing %s of memory\n", nbuf, pbuf);
/*
* Tell the VM system that page 0 isn't mapped.
*
* XXX This is bogus; should just fix KERNBASE and
* XXX VM_MIN_KERNEL_ADDRESS, but not right now.
*/
if (uvm_map_protect(kernel_map, 0, NBPG, UVM_PROT_NONE, TRUE)
!= KERN_SUCCESS)
panic("can't mark page 0 off-limits");
/*
* Tell the VM system that writing to kernel text isn't allowed.
* If we don't, we might end up COW'ing the text segment!
*
* XXX Should be m68k_trunc_page(&kernel_text) instead
* XXX of NBPG.
*/
if (uvm_map_protect(kernel_map, NBPG, m68k_round_page(&etext),
UVM_PROT_READ|UVM_PROT_EXEC, TRUE) != KERN_SUCCESS)
panic("can't protect kernel text");
/*
* Set up CPU-specific registers, cache, etc.
*/
initcpu();
/*
* Set up buffers, so they can be used to read disk labels.
*/
bufinit();
}
/*
* Set registers on exec.
*/
void
setregs(p, pack, stack)
struct proc *p;
struct exec_package *pack;
u_long stack;
{
struct frame *frame = (struct frame *)p->p_md.md_regs;
frame->f_sr = PSL_USERSET;
frame->f_pc = pack->ep_entry & ~1;
frame->f_regs[D0] = 0;
frame->f_regs[D1] = 0;
frame->f_regs[D2] = 0;
frame->f_regs[D3] = 0;
frame->f_regs[D4] = 0;
frame->f_regs[D5] = 0;
frame->f_regs[D6] = 0;
frame->f_regs[D7] = 0;
frame->f_regs[A0] = 0;
frame->f_regs[A1] = 0;
frame->f_regs[A2] = (int)PS_STRINGS;
frame->f_regs[A3] = 0;
frame->f_regs[A4] = 0;
frame->f_regs[A5] = 0;
frame->f_regs[A6] = 0;
frame->f_regs[SP] = stack;
/* restore a null state frame */
p->p_addr->u_pcb.pcb_fpregs.fpf_null = 0;
if (fputype)
m68881_restore(&p->p_addr->u_pcb.pcb_fpregs);
}
/*
* Info for CTL_HW
*/
char cpu_model[120];
struct hp300_model {
int id;
int mmuid;
const char *name;
const char *speed;
};
const struct hp300_model hp300_models[] = {
{ HP_320, -1, "320", "16.67" },
{ HP_330, -1, "318/319/330", "16.67" },
{ HP_340, -1, "340", "16.67" },
{ HP_345, -1, "345", "50" },
{ HP_350, -1, "350", "25" },
{ HP_360, -1, "360", "25" },
{ HP_370, -1, "370", "33.33" },
{ HP_375, -1, "375", "50" },
{ HP_380, -1, "380", "25" },
{ HP_385, -1, "385", "33" },
{ HP_400, -1, "400", "50" },
{ HP_425, MMUID_425_T, "425t", "25" },
{ HP_425, MMUID_425_S, "425s", "25" },
{ HP_425, MMUID_425_E, "425e", "25" },
{ HP_425, -1, "425", "25" },
{ HP_433, MMUID_433_T, "433t", "33" },
{ HP_433, MMUID_433_S, "433s", "33" },
{ HP_433, -1, "433", "33" },
{ 0, -1, NULL, NULL },
};
void
identifycpu()
{
const char *t, *mc, *s;
int i, len;
/*
* Find the model number.
*/
for (t = s = NULL, i = 0; hp300_models[i].name != NULL; i++) {
if (hp300_models[i].id == machineid) {
if (hp300_models[i].mmuid != -1 &&
hp300_models[i].mmuid != mmuid)
continue;
t = hp300_models[i].name;
s = hp300_models[i].speed;
break;
}
}
if (t == NULL) {
printf("\nunknown machineid %d\n", machineid);
goto lose;
}
/*
* ...and the CPU type.
*/
switch (cputype) {
case CPU_68040:
mc = "40";
break;
case CPU_68030:
mc = "30";
break;
case CPU_68020:
mc = "20";
break;
default:
printf("\nunknown cputype %d\n", cputype);
goto lose;
}
sprintf(cpu_model, "HP 9000/%s (%sMHz MC680%s CPU", t, s, mc);
/*
* ...and the MMU type.
*/
switch (mmutype) {
case MMU_68040:
case MMU_68030:
strcat(cpu_model, "+MMU");
break;
case MMU_68851:
strcat(cpu_model, ", MC68851 MMU");
break;
case MMU_HP:
strcat(cpu_model, ", HP MMU");
break;
default:
printf("%s\nunknown MMU type %d\n", cpu_model, mmutype);
panic("startup");
}
len = strlen(cpu_model);
/*
* ...and the FPU type.
*/
switch (fputype) {
case FPU_68040:
len += sprintf(cpu_model + len, "+FPU");
break;
case FPU_68882:
len += sprintf(cpu_model + len, ", %sMHz MC68882 FPU", s);
break;
case FPU_68881:
len += sprintf(cpu_model + len, ", %sMHz MC68881 FPU",
machineid == HP_350 ? "20" : "16.67");
break;
default:
len += sprintf(cpu_model + len, ", unknown FPU");
}
/*
* ...and finally, the cache type.
*/
if (cputype == CPU_68040)
sprintf(cpu_model + len, ", 4k on-chip physical I/D caches");
else {
switch (ectype) {
case EC_VIRT:
sprintf(cpu_model + len,
", %dK virtual-address cache",
machineid == HP_320 ? 16 : 32);
break;
case EC_PHYS:
sprintf(cpu_model + len,
", %dK physical-address cache",
machineid == HP_370 ? 64 : 32);
break;
}
}
strcat(cpu_model, ")");
printf("%s\n", cpu_model);
printf("cpu: delay divisor %d", delay_divisor);
if (mmuid)
printf(", mmuid %d", mmuid);
printf("\n");
/*
* Now that we have told the user what they have,
* let them know if that machine type isn't configured.
*/
switch (machineid) {
case -1: /* keep compilers happy */
#if !defined(HP320)
case HP_320:
#endif
#if !defined(HP330)
case HP_330:
#endif
#if !defined(HP340)
case HP_340:
#endif
#if !defined(HP345)
case HP_345:
#endif
#if !defined(HP350)
case HP_350:
#endif
#if !defined(HP360)
case HP_360:
#endif
#if !defined(HP370)
case HP_370:
#endif
#if !defined(HP375)
case HP_375:
#endif
#if !defined(HP380)
case HP_380:
#endif
#if !defined(HP385)
case HP_385:
#endif
#if !defined(HP400)
case HP_400:
#endif
#if !defined(HP425)
case HP_425:
#endif
#if !defined(HP433)
case HP_433:
#endif
panic("SPU type not configured");
default:
break;
}
return;
lose:
panic("startup");
}
/*
* machine dependent system variables.
*/
int
cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
int *name;
u_int namelen;
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
struct proc *p;
{
dev_t consdev;
/* all sysctl names at this level are terminal */
if (namelen != 1)
return (ENOTDIR); /* overloaded */
switch (name[0]) {
case CPU_CONSDEV:
if (cn_tab != NULL)
consdev = cn_tab->cn_dev;
else
consdev = NODEV;
return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev,
sizeof consdev));
default:
return (EOPNOTSUPP);
}
/* NOTREACHED */
}
int waittime = -1;
void
cpu_reboot(howto, bootstr)
int howto;
char *bootstr;
{
#if __GNUC__ /* XXX work around lame compiler problem (gcc 2.7.2) */
(void)&howto;
#endif
/* take a snap shot before clobbering any registers */
if (curproc && curproc->p_addr)
savectx(&curproc->p_addr->u_pcb);
/* If system is cold, just halt. */
if (cold) {
howto |= RB_HALT;
goto haltsys;
}
boothowto = howto;
if ((howto & RB_NOSYNC) == 0 && waittime < 0) {
waittime = 0;
vfs_shutdown();
/*
* If we've been adjusting the clock, the todr
* will be out of synch; adjust it now.
*/
resettodr();
}
/* Disable interrupts. */
splhigh();
/* If rebooting and a dump is requested do it. */
if (howto & RB_DUMP)
dumpsys();
haltsys:
/* Run any shutdown hooks. */
doshutdownhooks();
#if defined(PANICWAIT) && !defined(DDB)
if ((howto & RB_HALT) == 0 && panicstr) {
printf("hit any key to reboot...\n");
(void)cngetc();
printf("\n");
}
#endif
/* Finally, halt/reboot the system. */
if (howto & RB_HALT) {
printf("System halted. Hit any key to reboot.\n\n");
(void)cngetc();
}
printf("rebooting...\n");
DELAY(1000000);
doboot();
/*NOTREACHED*/
}
/*
* Initialize the kernel crash dump header.
*/
void
cpu_init_kcore_hdr()
{
cpu_kcore_hdr_t *h = &cpu_kcore_hdr;
struct m68k_kcore_hdr *m = &h->un._m68k;
extern int end;
bzero(&cpu_kcore_hdr, sizeof(cpu_kcore_hdr));
/*
* Initialize the `dispatcher' portion of the header.
*/
strcpy(h->name, machine);
h->page_size = NBPG;
h->kernbase = KERNBASE;
/*
* Fill in information about our MMU configuration.
*/
m->mmutype = mmutype;
m->sg_v = SG_V;
m->sg_frame = SG_FRAME;
m->sg_ishift = SG_ISHIFT;
m->sg_pmask = SG_PMASK;
m->sg40_shift1 = SG4_SHIFT1;
m->sg40_mask2 = SG4_MASK2;
m->sg40_shift2 = SG4_SHIFT2;
m->sg40_mask3 = SG4_MASK3;
m->sg40_shift3 = SG4_SHIFT3;
m->sg40_addr1 = SG4_ADDR1;
m->sg40_addr2 = SG4_ADDR2;
m->pg_v = PG_V;
m->pg_frame = PG_FRAME;
/*
* Initialize pointer to kernel segment table.
*/
m->sysseg_pa = (u_int32_t)(pmap_kernel()->pm_stpa);
/*
* Initialize relocation value such that:
*
* pa = (va - KERNBASE) + reloc
*/
m->reloc = lowram;
/*
* Define the end of the relocatable range.
*/
m->relocend = (u_int32_t)&end;
/*
* hp300 has one contiguous memory segment.
*/
m->ram_segs[0].start = lowram;
m->ram_segs[0].size = ctob(physmem);
}
/*
* Compute the size of the machine-dependent crash dump header.
* Returns size in disk blocks.
*/
int
cpu_dumpsize()
{
int size;
size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t));
return (btodb(roundup(size, dbtob(1))));
}
/*
* Called by dumpsys() to dump the machine-dependent header.
*/
int
cpu_dump(dump, blknop)
int (*dump) __P((dev_t, daddr_t, caddr_t, size_t));
daddr_t *blknop;
{
int buf[dbtob(1) / sizeof(int)];
cpu_kcore_hdr_t *chdr;
kcore_seg_t *kseg;
int error;
kseg = (kcore_seg_t *)buf;
chdr = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(kcore_seg_t)) /
sizeof(int)];
/* Create the segment header. */
CORE_SETMAGIC(*kseg, KCORE_MAGIC, MID_MACHINE, CORE_CPU);
kseg->c_size = dbtob(1) - ALIGN(sizeof(kcore_seg_t));
bcopy(&cpu_kcore_hdr, chdr, sizeof(cpu_kcore_hdr_t));
error = (*dump)(dumpdev, *blknop, (caddr_t)buf, sizeof(buf));
*blknop += btodb(sizeof(buf));
return (error);
}
/*
* These variables are needed by /sbin/savecore
*/
u_long dumpmag = 0x8fca0101; /* magic number */
int dumpsize = 0; /* pages */
long dumplo = 0; /* blocks */
/*
* This is called by main to set dumplo and dumpsize.
* Dumps always skip the first NBPG of disk space
* in case there might be a disk label stored there.
* If there is extra space, put dump at the end to
* reduce the chance that swapping trashes it.
*/
void
cpu_dumpconf()
{
int chdrsize; /* size of dump header */
int nblks; /* size of dump area */
int maj;
if (dumpdev == NODEV)
return;
maj = major(dumpdev);
if (maj < 0 || maj >= nblkdev)
panic("dumpconf: bad dumpdev=0x%x", dumpdev);
if (bdevsw[maj].d_psize == NULL)
return;
nblks = (*bdevsw[maj].d_psize)(dumpdev);
chdrsize = cpu_dumpsize();
dumpsize = btoc(cpu_kcore_hdr.un._m68k.ram_segs[0].size);
/*
* Check do see if we will fit. Note we always skip the
* first NBPG in case there is a disk label there.
*/
if (nblks < (ctod(dumpsize) + chdrsize + ctod(1))) {
dumpsize = 0;
dumplo = -1;
return;
}
/*
* Put dump at the end of the partition.
*/
dumplo = (nblks - 1) - ctod(dumpsize) - chdrsize;
}
/*
* Dump physical memory onto the dump device. Called by cpu_reboot().
*/
void
dumpsys()
{
daddr_t blkno; /* current block to write */
/* dump routine */
int (*dump) __P((dev_t, daddr_t, caddr_t, size_t));
int pg; /* page being dumped */
paddr_t maddr; /* PA being dumped */
int error; /* error code from (*dump)() */
/* XXX initialized here because of gcc lossage */
maddr = lowram;
pg = 0;
/* Make sure dump device is valid. */
if (dumpdev == NODEV)
return;
if (dumpsize == 0) {
cpu_dumpconf();
if (dumpsize == 0)
return;
}
if (dumplo <= 0) {
printf("\ndump to dev %u,%u not possible\n", major(dumpdev),
minor(dumpdev));
return;
}
dump = bdevsw[major(dumpdev)].d_dump;
blkno = dumplo;
printf("\ndumping to dev %u,%u offset %ld\n", major(dumpdev),
minor(dumpdev), dumplo);
printf("dump ");
/* Write the dump header. */
error = cpu_dump(dump, &blkno);
if (error)
goto bad;
for (pg = 0; pg < dumpsize; pg++) {
#define NPGMB (1024*1024/NBPG)
/* print out how many MBs we have dumped */
if (pg && (pg % NPGMB) == 0)
printf("%d ", pg / NPGMB);
#undef NPGMB
pmap_enter(pmap_kernel(), (vaddr_t)vmmap, maddr,
VM_PROT_READ, VM_PROT_READ|PMAP_WIRED);
error = (*dump)(dumpdev, blkno, vmmap, NBPG);
bad:
switch (error) {
case 0:
maddr += NBPG;
blkno += btodb(NBPG);
break;
case ENXIO:
printf("device bad\n");
return;
case EFAULT:
printf("device not ready\n");
return;
case EINVAL:
printf("area improper\n");
return;
case EIO:
printf("i/o error\n");
return;
case EINTR:
printf("aborted from console\n");
return;
default:
printf("error %d\n", error);
return;
}
}
printf("succeeded\n");
}
void
initcpu()
{
#ifdef MAPPEDCOPY
/*
* Initialize lower bound for doing copyin/copyout using
* page mapping (if not already set). We don't do this on
* VAC machines as it loses big time.
*/
if (ectype == EC_VIRT)
mappedcopysize = -1; /* in case it was patched */
else
mappedcopysize = NBPG;
#endif
parityenable();
#ifdef USELEDS
ledinit();
#endif
}
void
straytrap(pc, evec)
int pc;
u_short evec;
{
printf("unexpected trap (vector offset %x) from %x\n",
evec & 0xFFF, pc);
}
/* XXX should change the interface, and make one badaddr() function */
int *nofault;
int
badaddr(addr)
caddr_t addr;
{
int i;
label_t faultbuf;
nofault = (int *) &faultbuf;
if (setjmp((label_t *)nofault)) {
nofault = (int *) 0;
return(1);
}
i = *(volatile short *)addr;
nofault = (int *) 0;
return(0);
}
int
badbaddr(addr)
caddr_t addr;
{
int i;
label_t faultbuf;
nofault = (int *) &faultbuf;
if (setjmp((label_t *)nofault)) {
nofault = (int *) 0;
return(1);
}
i = *(volatile char *)addr;
nofault = (int *) 0;
return(0);
}
/*
* lookup_bootinfo:
*
* Look up information in bootinfo from boot loader.
*/
void *
lookup_bootinfo(type)
int type;
{
struct btinfo_common *bt;
char *help = (char *)bootinfo_va;
/* Check for a bootinfo record first. */
if (help == NULL)
return (NULL);
do {
bt = (struct btinfo_common *)help;
if (bt->type == type)
return (help);
help += bt->next;
} while (bt->next != 0 &&
(size_t)help < (size_t)bootinfo_va + BOOTINFO_SIZE);
return (NULL);
}
#ifdef PANICBUTTON
/*
* Declare these so they can be patched.
*/
int panicbutton = 1; /* non-zero if panic buttons are enabled */
int candbdiv = 2; /* give em half a second (hz / candbdiv) */
void candbtimer __P((void *));
int crashandburn;
struct callout candbtimer_ch = CALLOUT_INITIALIZER;
void
candbtimer(arg)
void *arg;
{
crashandburn = 0;
}
#endif /* PANICBUTTON */
static int innmihand; /* simple mutex */
/*
* Level 7 interrupts can be caused by the keyboard or parity errors.
*/
void
nmihand(frame)
struct frame frame;
{
/* Prevent unwanted recursion. */
if (innmihand)
return;
innmihand = 1;
/* Check for keyboard <CRTL>+<SHIFT>+<RESET>. */
if (kbdnmi()) {
printf("Got a keyboard NMI");
/*
* We can:
*
* - enter DDB
*
* - Start the crashandburn sequence
*
* - Ignore it.
*/
#ifdef DDB
printf(": entering debugger\n");
Debugger();
#else
#ifdef PANICBUTTON
if (panicbutton) {
if (crashandburn) {
crashandburn = 0;
printf(": CRASH AND BURN!\n");
panic("forced crash");
} else {
/* Start the crashandburn sequence */
printf("\n");
crashandburn = 1;
callout_reset(&candbtimer_ch, hz / candbdiv,
candbtiner, NULL);
}
} else
#endif /* PANICBUTTON */
printf(": ignoring\n");
#endif /* DDB */
goto nmihand_out; /* no more work to do */
}
if (parityerror(&frame))
return;
/* panic?? */
printf("unexpected level 7 interrupt ignored\n");
nmihand_out:
innmihand = 0;
}
/*
* Parity error section. Contains magic.
*/
#define PARREG ((volatile short *)IIOV(0x5B0000))
static int gotparmem = 0;
#ifdef DEBUG
int ignorekperr = 0; /* ignore kernel parity errors */
#endif
/*
* Enable parity detection
*/
void
parityenable()
{
label_t faultbuf;
nofault = (int *) &faultbuf;
if (setjmp((label_t *)nofault)) {
nofault = (int *) 0;
printf("No parity memory\n");
return;
}
*PARREG = 1;
nofault = (int *) 0;
gotparmem = 1;
printf("Parity detection enabled\n");
}
/*
* Determine if level 7 interrupt was caused by a parity error
* and deal with it if it was. Returns 1 if it was a parity error.
*/
int
parityerror(fp)
struct frame *fp;
{
if (!gotparmem)
return(0);
*PARREG = 0;
DELAY(10);
*PARREG = 1;
if (panicstr) {
printf("parity error after panic ignored\n");
return(1);
}
if (!parityerrorfind())
printf("WARNING: transient parity error ignored\n");
else if (USERMODE(fp->f_sr)) {
printf("pid %d: parity error\n", curproc->p_pid);
uprintf("sorry, pid %d killed due to memory parity error\n",
curproc->p_pid);
psignal(curproc, SIGKILL);
#ifdef DEBUG
} else if (ignorekperr) {
printf("WARNING: kernel parity error ignored\n");
#endif
} else {
regdump((struct trapframe *)fp, 128);
panic("kernel parity error");
}
return(1);
}
/*
* Yuk! There has got to be a better way to do this!
* Searching all of memory with interrupts blocked can lead to disaster.
*/
int
parityerrorfind()
{
static label_t parcatch;
static int looking = 0;
volatile int pg, o, s;
volatile int *ip;
int i;
int found;
#ifdef lint
i = o = pg = 0; if (i) return(0);
#endif
/*
* If looking is true we are searching for a known parity error
* and it has just occured. All we do is return to the higher
* level invocation.
*/
if (looking)
longjmp(&parcatch);
s = splhigh();
/*
* If setjmp returns true, the parity error we were searching
* for has just occured (longjmp above) at the current pg+o
*/
if (setjmp(&parcatch)) {
printf("Parity error at 0x%x\n", ctob(pg)|o);
found = 1;
goto done;
}
/*
* If we get here, a parity error has occured for the first time
* and we need to find it. We turn off any external caches and
* loop thru memory, testing every longword til a fault occurs and
* we regain control at setjmp above. Note that because of the
* setjmp, pg and o need to be volatile or their values will be lost.
*/
looking = 1;
ecacheoff();
for (pg = btoc(lowram); pg < btoc(lowram)+physmem; pg++) {
pmap_enter(pmap_kernel(), (vaddr_t)vmmap, ctob(pg),
VM_PROT_READ, VM_PROT_READ|PMAP_WIRED);
ip = (int *)vmmap;
for (o = 0; o < NBPG; o += sizeof(int))
i = *ip++;
}
/*
* Getting here implies no fault was found. Should never happen.
*/
printf("Couldn't locate parity error\n");
found = 0;
done:
looking = 0;
pmap_remove(pmap_kernel(), (vaddr_t)vmmap, (vaddr_t)&vmmap[NBPG]);
ecacheon();
splx(s);
return(found);
}
/*
* cpu_exec_aout_makecmds():
* cpu-dependent a.out format hook for execve().
*
* Determine of the given exec package refers to something which we
* understand and, if so, set up the vmcmds for it.
*
* XXX what are the special cases for the hp300?
* XXX why is this COMPAT_NOMID? was something generating
* hp300 binaries with an a_mid of 0? i thought that was only
* done on little-endian machines... -- cgd
*/
int
cpu_exec_aout_makecmds(p, epp)
struct proc *p;
struct exec_package *epp;
{
#if defined(COMPAT_NOMID) || defined(COMPAT_44)
u_long midmag, magic;
u_short mid;
int error;
struct exec *execp = epp->ep_hdr;
midmag = ntohl(execp->a_midmag);
mid = (midmag >> 16) & 0xffff;
magic = midmag & 0xffff;
midmag = mid << 16 | magic;
switch (midmag) {
#ifdef COMPAT_NOMID
case (MID_ZERO << 16) | ZMAGIC:
error = exec_aout_prep_oldzmagic(p, epp);
return(error);
#endif
#ifdef COMPAT_44
case (MID_HP300 << 16) | ZMAGIC:
error = exec_aout_prep_oldzmagic(p, epp);
return(error);
#endif
}
#endif /* !(defined(COMPAT_NOMID) || defined(COMPAT_44)) */
return ENOEXEC;
}
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