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NetBSD/sys/arch/x68k/x68k/machdep.c

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/* $NetBSD: machdep.c,v 1.99 2001/06/02 18:09:24 chs 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_kgdb.h"
#include "opt_compat_netbsd.h"
#include "opt_m680x0.h"
#include "opt_fpuemulate.h"
#include "opt_m060sp.h"
#include "opt_panicbutton.h"
#include "opt_extmem.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/signalvar.h>
#include <sys/kernel.h>
#include <sys/map.h>
#include <sys/proc.h>
#include <sys/buf.h>
#include <sys/reboot.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/clist.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/msgbuf.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/mount.h>
#include <sys/user.h>
#include <sys/exec.h>
#include <sys/vnode.h>
#include <sys/syscallargs.h>
#include <sys/core.h>
#include <sys/kcore.h>
#if defined(DDB) && defined(__ELF__)
#include <sys/exec_elf.h>
#endif
#include <net/netisr.h>
#undef PS /* XXX netccitt/pk.h conflict with machine/reg.h? */
#include <machine/db_machdep.h>
#include <ddb/db_sym.h>
#include <ddb/db_extern.h>
#include <machine/cpu.h>
#include <machine/reg.h>
#include <machine/psl.h>
#include <machine/pte.h>
#include <machine/kcore.h>
#include <dev/cons.h>
#define MAXMEM 64*1024 /* XXX - from cmap.h */
#include <uvm/uvm_extern.h>
#include <sys/sysctl.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <arch/x68k/dev/intiovar.h>
void initcpu __P((void));
void identifycpu __P((void));
void doboot __P((void))
__attribute__((__noreturn__));
int badaddr __P((caddr_t));
int badbaddr __P((caddr_t));
/* 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;
struct vm_map *exec_map = NULL;
struct vm_map *mb_map = NULL;
struct vm_map *phys_map = NULL;
extern paddr_t avail_start, avail_end;
extern vaddr_t virtual_avail;
extern u_int lowram;
extern int end, *esym;
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;
/* prototypes for local functions */
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));
#ifdef EXTENDED_MEMORY
static int mem_exists __P((caddr_t, u_long));
static void setmemrange __P((void));
#endif
/* functions called from locore.s */
void dumpsys __P((void));
void straytrap __P((int, u_short));
void nmihand __P((struct frame));
void intrhand __P((int));
/*
* On the 68020/68030, the value of delay_divisor is roughly
* 2048 / cpuspeed (where cpuspeed is in MHz).
*
* On the 68040, the value of delay_divisor is roughly
* 759 / cpuspeed (where cpuspeed is in MHz).
*
* On the 68060, the value of delay_divisor is reported to be
* 128 / cpuspeed (where cpuspeed is in MHz).
*/
int delay_divisor = 140; /* assume some reasonable value to start */
static int cpuspeed; /* MPU clock (in MHz) */
/*
* Machine-dependent crash dump header info.
*/
cpu_kcore_hdr_t cpu_kcore_hdr;
/*
* Console initialization: called early on from main,
* before vm init or startup. Do enough configuration
* to choose and initialize a console.
*/
void
consinit()
{
/*
* bring graphics layer up.
*/
config_console();
/*
* Initialize the console before we print anything out.
*/
cninit();
#ifdef KGDB
zs_kgdb_init(); /* XXX */
#endif
#ifdef DDB
#ifndef __ELF__
ddb_init(*(int *)&end, ((int *)&end) + 1, esym);
#else
ddb_init((int)esym - (int)&end - sizeof(Elf32_Ehdr),
(void *)&end, esym);
#endif
if (boothowto & RB_KDB)
Debugger();
#endif
/*
* Tell the VM system about available physical memory.
*/
uvm_page_physload(atop(avail_start), atop(avail_end),
atop(avail_start), atop(avail_end),
VM_FREELIST_DEFAULT);
#ifdef EXTENDED_MEMORY
setmemrange();
#endif
}
/*
* cpu_startup: allocate memory for variable-sized tables,
* initialize cpu, and do autoconfiguration.
*/
void
cpu_startup()
{
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
#if 0
rtclockinit(); /* XXX */
#endif
/*
* 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);
pmap_update();
initmsgbuf(msgbufaddr, m68k_round_page(MSGBUFSIZE));
/*
* 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 then give everything true virtual addresses.
*/
size = (vm_size_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, 0,
UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE,
UVM_ADV_NORMAL, 0)) != 0)
panic("startup: cannot allocate VM for buffers");
minaddr = (vaddr_t)buffers;
#if 0
if ((bufpages / nbuf) >= btoc(MAXBSIZE)) {
/* don't want to alloc more physical mem than needed */
bufpages = btoc(MAXBSIZE) * nbuf;
}
#endif
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 = (vsize_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;
}
}
pmap_update();
/*
* 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);
/*
* 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[96]; /* max 85 chars */
static char *fpu_descr[] = {
#ifdef FPU_EMULATE
", emulator FPU", /* 0 */
#else
", no math support", /* 0 */
#endif
", m68881 FPU", /* 1 */
", m68882 FPU", /* 2 */
"/FPU", /* 3 */
"/FPU", /* 4 */
};
void
identifycpu()
{
/* there's alot of XXX in here... */
char *cpu_type, *mach, *mmu, *fpu;
char clock[16];
/*
* check machine type constant
*/
switch (intio_get_sysport_mpustat()) {
case 0xdc:
/*
* CPU Type == 68030, Clock == 25MHz
*/
mach = "030";
break;
case 0xfe:
/*
* CPU Type == 68000, Clock == 16MHz
*/
mach = "000XVI";
break;
case 0xff:
/*
* CPU Type == 68000, Clock == 10MHz
*/
mach = "000/ACE/PRO/EXPERT/SUPER";
break;
default:
/*
* unknown type
*/
mach = "000?(unknown model)";
break;
}
cpuspeed = 2048 / delay_divisor;
sprintf(clock, "%dMHz", cpuspeed);
switch (cputype) {
case CPU_68060:
cpu_type = "m68060";
mmu = "/MMU";
cpuspeed = 128 / delay_divisor;
sprintf(clock, "%d/%dMHz", cpuspeed*2, cpuspeed);
break;
case CPU_68040:
cpu_type = "m68040";
mmu = "/MMU";
cpuspeed = 759 / delay_divisor;
sprintf(clock, "%d/%dMHz", cpuspeed*2, cpuspeed);
break;
case CPU_68030:
cpu_type = "m68030";
mmu = "/MMU";
break;
case CPU_68020:
cpu_type = "m68020";
mmu = ", m68851 MMU";
break;
default:
cpu_type = "unknown";
mmu = ", unknown MMU";
break;
}
if (fputype >= 0 && fputype < sizeof(fpu_descr)/sizeof(fpu_descr[0]))
fpu = fpu_descr[fputype];
else
fpu = ", unknown FPU";
sprintf(cpu_model, "X68%s (%s CPU%s%s, %s clock)",
mach, cpu_type, mmu, fpu, clock);
printf("%s\n", cpu_model);
}
/*
* 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;
int power_switch_is_off = 0;
void
cpu_reboot(howto, bootstr)
int howto;
char *bootstr;
{
/* take a snap shot before clobbering any registers */
if (curproc && curproc->p_addr)
savectx(&curproc->p_addr->u_pcb);
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 interrputs. */
splhigh();
if (howto & RB_DUMP)
dumpsys();
/* 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. */
/* a) RB_POWERDOWN
* a1: the power switch is still on
* Power cannot be removed; simply halt the system (b)
* Power switch state is checked in shutdown hook
* a2: the power switch is off
* Remove the power; the simplest way is go back to ROM eg. reboot
* b) RB_HALT
* call cngetc
* c) otherwise
* Reboot
*/
if (((howto & RB_POWERDOWN) == RB_POWERDOWN) && power_switch_is_off)
doboot();
else if (/*((howto & RB_POWERDOWN) == RB_POWERDOWN) ||*/
((howto & RB_HALT) == 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;
int i;
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;
/*
* X68k has multiple RAM segments on some models.
*/
m->ram_segs[0].start = lowram;
m->ram_segs[0].size = mem_size - lowram;
for (i = 1; i < vm_nphysseg; i++) {
m->ram_segs[i].start = ctob(vm_physmem[i].start);
m->ram_segs[i].size = ctob(vm_physmem[i].end
- vm_physmem[i].start);
}
}
/*
* 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()
{
cpu_kcore_hdr_t *h = &cpu_kcore_hdr;
struct m68k_kcore_hdr *m = &h->un._m68k;
int chdrsize; /* size of dump header */
int nblks; /* size of dump area */
int maj;
int i;
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 = 0;
for (i = 0; m->ram_segs[i].size && i < M68K_NPHYS_RAM_SEGS; i++)
dumpsize += btoc(m->ram_segs[i].size);
/*
* Check to 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;
}
void
dumpsys()
{
cpu_kcore_hdr_t *h = &cpu_kcore_hdr;
struct m68k_kcore_hdr *m = &h->un._m68k;
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 seg; /* RAM segment being dumped */
int error; /* error code from (*dump)() */
/* XXX initialized here because of gcc lossage */
seg = 0;
maddr = m->ram_segs[seg].start;
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
if (maddr == 0) {
/* Skip first page */
maddr += NBPG;
blkno += btodb(NBPG);
continue;
}
while (maddr >=
(m->ram_segs[seg].start + m->ram_segs[seg].size)) {
if (++seg >= M68K_NPHYS_RAM_SEGS ||
m->ram_segs[seg].size == 0) {
error = EINVAL; /* XXX ?? */
goto bad;
}
maddr = m->ram_segs[seg].start;
}
pmap_enter(pmap_kernel(), (vaddr_t)vmmap, maddr,
VM_PROT_READ, VM_PROT_READ|PMAP_WIRED);
pmap_update();
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()
{
/* XXX should init '40 vecs here, too */
#if defined(M68060)
extern caddr_t vectab[256];
#if defined(M060SP)
extern u_int8_t I_CALL_TOP[];
extern u_int8_t FP_CALL_TOP[];
#else
extern u_int8_t illinst;
#endif
extern u_int8_t fpfault;
#endif
#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 ((int) mappedcopysize == -1) {
mappedcopysize = NBPG;
}
#endif
#if defined(M68060)
if (cputype == CPU_68060) {
#if defined(M060SP)
/* integer support */
vectab[61] = &I_CALL_TOP[128 + 0x00];
/* floating point support */
vectab[11] = &FP_CALL_TOP[128 + 0x30];
vectab[55] = &FP_CALL_TOP[128 + 0x38];
vectab[60] = &FP_CALL_TOP[128 + 0x40];
vectab[54] = &FP_CALL_TOP[128 + 0x00];
vectab[52] = &FP_CALL_TOP[128 + 0x08];
vectab[53] = &FP_CALL_TOP[128 + 0x10];
vectab[51] = &FP_CALL_TOP[128 + 0x18];
vectab[50] = &FP_CALL_TOP[128 + 0x20];
vectab[49] = &FP_CALL_TOP[128 + 0x28];
#else
vectab[61] = &illinst;
#endif
vectab[48] = &fpfault;
}
DCIS();
#endif
}
void
straytrap(pc, evec)
int pc;
u_short evec;
{
printf("unexpected trap (vector offset %x) from %x\n",
evec & 0xFFF, pc);
#if defined(DDB)
Debugger();
#endif
}
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);
}
void netintr __P((void));
void
netintr()
{
#define DONETISR(bit, fn) do { \
if (netisr & (1 << bit)) { \
netisr &= ~(1 << bit); \
fn(); \
} \
} while (0)
#include <net/netisr_dispatch.h>
#undef DONETISR
}
void
intrhand(sr)
int sr;
{
printf("intrhand: unexpected sr 0x%x\n", sr);
}
#if (defined(DDB) || defined(DEBUG)) && !defined(PANICBUTTON)
#define PANICBUTTON
#endif
#ifdef PANICBUTTON
int panicbutton = 1; /* non-zero if panic buttons are enabled */
int crashandburn = 0;
int candbdelay = 50; /* give em half a second */
void candbtimer __P((void *));
static struct callout candbtimer_ch = CALLOUT_INITIALIZER;
void
candbtimer(arg)
void *arg;
{
crashandburn = 0;
}
#endif
/*
* Level 7 interrupts can be caused by the keyboard or parity errors.
*/
void
nmihand(frame)
struct frame frame;
{
intio_set_sysport_keyctrl(intio_get_sysport_keyctrl() | 0x04);
if (1) {
#ifdef PANICBUTTON
static int innmihand = 0;
/*
* Attempt to reduce the window of vulnerability for recursive
* NMIs (e.g. someone holding down the keyboard reset button).
*/
if (innmihand == 0) {
innmihand = 1;
printf("Got a keyboard NMI\n");
innmihand = 0;
}
#ifdef DDB
Debugger();
#else
if (panicbutton) {
if (crashandburn) {
crashandburn = 0;
panic(panicstr ?
"forced crash, nosync" : "forced crash");
}
crashandburn++;
callout_reset(&candbtimer_ch, candbdelay,
candbtimer, NULL);
}
#endif /* DDB */
#endif /* PANICBUTTON */
return;
}
/* panic?? */
printf("unexpected level 7 interrupt ignored\n");
}
/*
* 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);
break;
#endif
#ifdef COMPAT_44
case (MID_HP300 << 16) | ZMAGIC:
error = exec_aout_prep_oldzmagic(p, epp);
break;
#endif
default:
error = ENOEXEC;
}
return error;
#else /* !(defined(COMPAT_NOMID) || defined(COMPAT_44)) */
return ENOEXEC;
#endif
}
#ifdef EXTENDED_MEMORY
#ifdef EM_DEBUG
static int em_debug = 0;
#define DPRINTF(str) do{ if (em_debug) printf str; } while (0);
#else
#define DPRINTF(str)
#endif
static struct memlist {
caddr_t base;
psize_t min;
psize_t max;
} memlist[] = {
/* TS-6BE16 16MB memory */
{(caddr_t)0x01000000, 0x01000000, 0x01000000},
/* 060turbo SIMM slot (4--128MB) */
{(caddr_t)0x10000000, 0x00400000, 0x08000000},
};
static vaddr_t mem_v, base_v;
/*
* check memory existency
*/
static int
mem_exists(mem, basemax)
caddr_t mem;
u_long basemax;
{
/* most variables must be register! */
register volatile unsigned char *m, *b;
register unsigned char save_m, save_b;
register int baseismem;
register int exists = 0;
caddr_t base;
caddr_t begin_check, end_check;
label_t faultbuf;
DPRINTF (("Enter mem_exists(%p, %x)\n", mem, basemax));
DPRINTF ((" pmap_enter(%p, %p) for target... ", mem_v, mem));
pmap_enter(pmap_kernel(), mem_v, (paddr_t)mem,
VM_PROT_READ|VM_PROT_WRITE, VM_PROT_READ|PMAP_WIRED);
pmap_update();
DPRINTF ((" done.\n"));
/* only 24bits are significant on normal X680x0 systems */
base = (caddr_t)((u_long)mem & 0x00FFFFFF);
DPRINTF ((" pmap_enter(%p, %p) for shadow... ", base_v, base));
pmap_enter(pmap_kernel(), base_v, (paddr_t)base,
VM_PROT_READ|VM_PROT_WRITE, VM_PROT_READ|PMAP_WIRED);
pmap_update();
DPRINTF ((" done.\n"));
m = (void*)mem_v;
b = (void*)base_v;
/* This is somewhat paranoid -- avoid overwriting myself */
asm("lea %%pc@(begin_check_mem),%0" : "=a"(begin_check));
asm("lea %%pc@(end_check_mem),%0" : "=a"(end_check));
if (base >= begin_check && base < end_check) {
size_t off = end_check - begin_check;
DPRINTF ((" Adjusting the testing area.\n"));
m -= off;
b -= off;
}
nofault = (int *) &faultbuf;
if (setjmp ((label_t *)nofault)) {
nofault = (int *) 0;
pmap_remove(pmap_kernel(), mem_v, mem_v+NBPG);
pmap_remove(pmap_kernel(), base_v, base_v+NBPG);
pmap_update();
DPRINTF (("Fault!!! Returning 0.\n"));
return 0;
}
DPRINTF ((" Let's begin. mem=%p, base=%p, m=%p, b=%p\n",
mem, base, m, b));
(void) *m;
/*
* Can't check by writing if the corresponding
* base address isn't memory.
*
* I hope this would be no harm....
*/
baseismem = base < (caddr_t)basemax;
/* save original value (base must be saved first) */
if (baseismem)
save_b = *b;
save_m = *m;
asm("begin_check_mem:");
/*
* stack and other data segment variables are unusable
* til end_check_mem, because they may be clobbered.
*/
/*
* check memory by writing/reading
*/
if (baseismem)
*b = 0x55;
*m = 0xAA;
if ((baseismem && *b != 0x55) || *m != 0xAA)
goto out;
*m = 0x55;
if (baseismem)
*b = 0xAA;
if (*m != 0x55 || (baseismem && *b != 0xAA))
goto out;
exists = 1;
out:
*m = save_m;
if (baseismem)
*b = save_b;
asm("end_check_mem:");
nofault = (int *)0;
pmap_remove(pmap_kernel(), mem_v, mem_v+NBPG);
pmap_remove(pmap_kernel(), base_v, base_v+NBPG);
pmap_update();
DPRINTF ((" End.\n"));
DPRINTF (("Returning from mem_exists. result = %d\n", exists));
return exists;
}
static void
setmemrange(void)
{
int i;
psize_t s, min, max;
struct memlist *mlist = memlist;
u_long h;
int basemax = ctob(physmem);
/*
* VM system is not started yet. Use the first and second avalable
* pages to map the (possible) target memory and its shadow.
*/
mem_v = virtual_avail; /* target */
base_v = mem_v + NBPG; /* shadow */
{ /* Turn off the processor cache. */
register int cacr;
PCIA(); /* cpusha dc */
switch (cputype) {
case CPU_68030:
cacr = CACHE_OFF;
break;
case CPU_68040:
cacr = CACHE40_OFF;
break;
case CPU_68060:
cacr = CACHE60_OFF;
break;
}
asm volatile ("movc %0,%%cacr"::"d"(cacr));
}
/* discover extended memory */
for (i = 0; i < sizeof(memlist) / sizeof(memlist[0]); i++) {
min = mlist[i].min;
max = mlist[i].max;
/*
* Normally, x68k hardware is NOT 32bit-clean.
* But some type of extended memory is in 32bit address space.
* Check whether.
*/
if (!mem_exists(mlist[i].base, basemax))
continue;
h = 0;
/* range check */
for (s = min; s <= max; s += 0x00100000) {
if (!mem_exists(mlist[i].base + s - 4, basemax))
break;
h = (u_long)(mlist[i].base + s);
}
if ((u_long)mlist[i].base < h) {
uvm_page_physload(atop(mlist[i].base), atop(h),
atop(mlist[i].base), atop(h),
VM_FREELIST_DEFAULT);
mem_size += h - (u_long) mlist[i].base;
}
}
{ /* Re-enable the processor cache. */
register int cacr;
ICIA();
switch (cputype) {
case CPU_68030:
cacr = CACHE_ON;
break;
case CPU_68040:
cacr = CACHE40_ON;
break;
case CPU_68060:
cacr = CACHE60_ON;
break;
}
asm volatile ("movc %0,%%cacr"::"d"(cacr));
}
physmem = m68k_btop(mem_size);
}
#endif
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