NetBSD-5.0.2/sys/arch/cesfic/cesfic/machdep.c
/* $NetBSD: machdep.c,v 1.42 2008/09/14 15:03:17 tsutsui Exp $ */
/*
* 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. 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
*/
/*
* Copyright (c) 1988 University of Utah.
*
* 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 <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.42 2008/09/14 15:03:17 tsutsui Exp $");
#include "opt_bufcache.h"
#include "opt_ddb.h"
#include "opt_kgdb.h"
#include "opt_compat_netbsd.h"
#include "opt_sysv.h"
#include "opt_panicbutton.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/callout.h>
#include <sys/conf.h>
#include <sys/exec.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/malloc.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/vnode.h>
#include <sys/ksyms.h>
#ifdef SYSVMSG
#include <sys/msg.h>
#endif
#ifdef SYSVSEM
#include <sys/sem.h>
#endif
#ifdef SYSVSHM
#include <sys/shm.h>
#endif
#include <sys/kgdb.h>
#include <machine/db_machdep.h>
#include <ddb/db_sym.h>
#include <ddb/db_extern.h>
#include <machine/autoconf.h>
#include <machine/cpu.h>
#include <machine/reg.h>
#include <machine/psl.h>
#include <machine/pte.h>
#define MAXMEM 64*1024 /* XXX - from cmap.h */
#include <uvm/uvm_extern.h>
#include <sys/sysctl.h>
#include <sys/device.h>
#include <dev/cons.h>
#include <dev/ic/z8530reg.h>
#include <machine/z8530var.h>
#include <cesfic/dev/zsvar.h>
#include "ksyms.h"
/* the following is used externally (sysctl_hw) */
char machine[] = MACHINE; /* CPU "architecture" */
/* Our exported CPU info; we can have only one. */
struct cpu_info cpu_info_store;
struct vm_map *mb_map = NULL;
struct vm_map *phys_map = NULL;
extern vaddr_t virtual_avail;
/*
* Declare these as initialized data so we can patch them.
*/
/*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;
void fic_init __P((void));
/* prototypes for local functions */
void identifycpu __P((void));
void dumpmem __P((int *, int, int));
char *hexstr __P((int, int));
/* functions called from locore.s */
void dumpsys __P((void));
void straytrap __P((int, u_short));
void nmihand __P((struct frame));
int delay_divisor; /* delay constant */
extern void sicinit __P((void*));
void fic_init()
{
int i;
extern paddr_t avail_start, avail_end;
boothowto = RB_SINGLE; /* XXX for now */
boothowto |= RB_KDB; /* XXX for now */
delay_divisor = 30; /* XXX */
/*
* Tell the VM system about available physical memory. The
* fic uses one segment.
*/
uvm_page_physload(atop(avail_start), atop(avail_end),
atop(avail_start), atop(avail_end), VM_FREELIST_DEFAULT);
/*
* map and init interrupt controller
*/
physaccess((void*)virtual_avail, (void*)0x44000000,
PAGE_SIZE, PG_RW|PG_CI);
sicinit((void*)virtual_avail);
virtual_avail += PAGE_SIZE;
/*
* 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 * PAGE_SIZE,
avail_end + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE,
VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED);
pmap_update(pmap_kernel());
initmsgbuf(msgbufaddr, m68k_round_page(MSGBUFSIZE));
}
int
zs_check_kgdb(cs, dev)
struct zs_chanstate *cs;
int dev;
{
if((boothowto & RB_KDB) && (dev == makedev(10, 0)))
return (1);
return (0);
}
void zs_kgdb_cnputc __P((dev_t, int));
void zs_kgdb_cnputc(dev, c)
dev_t dev;
int c;
{
zscnputc(dev, c);
}
int zs_kgdb_cngetc __P((dev_t));
int zs_kgdb_cngetc(dev)
dev_t dev;
{
return (zscngetc(dev));
}
/*
* Console initialization: called early on from main,
* before vm init or startup. Do enough configuration
* to choose and initialize a console.
*/
extern void sic_enable_int __P((int, int, int, int, int));
void
consinit()
{
/*
* Initialize the console before we print anything out.
*/
physaccess((void*)virtual_avail,
(void*)0x58000000, PAGE_SIZE, PG_RW|PG_CI);
zs_cnattach((void*)virtual_avail);
virtual_avail += PAGE_SIZE;
#ifdef KGDB
kgdb_dev = 1;
kgdb_attach((void*)zscngetc, (void*)zscnputc, (void *)0);
if (boothowto & RB_KDB) {
kgdb_connect(1);
zscons.cn_putc = zs_kgdb_cnputc;
zscons.cn_getc = zs_kgdb_cngetc;
}
#endif
#if NKSYMS || defined(DDB) || defined(LKM)
ksyms_init(0, 0, 0);
#endif
#ifdef DDB
if (boothowto & RB_KDB)
Debugger();
#endif
sic_enable_int(39, 2, 1, 7, 0); /* NMI */
}
/*
* cpu_startup: allocate memory for variable-sized tables,
* initialize CPU, and do autoconfiguration.
*/
void
cpu_startup()
{
vaddr_t minaddr, maxaddr;
#ifdef DEBUG
extern int pmapdebug;
int opmapdebug = pmapdebug;
pmapdebug = 0;
#endif
if (fputype != FPU_NONE)
m68k_make_fpu_idle_frame();
/*
* Good {morning,afternoon,evening,night}.
*/
printf("%s%s", copyright, version);
identifycpu();
printf("real mem = %d\n", ctob(physmem));
minaddr = 0;
/*
* 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
printf("avail mem = %ld\n", ptoa(uvmexp.free));
}
/*
* Set registers on exec.
* XXX Should clear registers except sp, pc,
* but would break init; should be fixed soon.
*/
void
setregs(l, pack, stack)
struct lwp *l;
struct exec_package *pack;
u_long stack;
{
struct frame *frame = (struct frame *)l->l_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)l->l_proc->p_psstr;
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 */
l->l_addr->u_pcb.pcb_fpregs.fpf_null = 0;
if (fputype)
m68881_restore(&l->l_addr->u_pcb.pcb_fpregs);
}
/*
* Info for CTL_HW
*/
char cpu_model[] = "FIC8234";
void
identifycpu()
{
printf("%s\n", cpu_model);
printf("delay constant: %d\n", delay_divisor);
}
/*
* machine dependent system variables.
*/
SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup")
{
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "machdep", NULL,
NULL, 0, NULL, 0,
CTL_MACHDEP, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRUCT, "console_device", NULL,
sysctl_consdev, 0, NULL, sizeof(dev_t),
CTL_MACHDEP, CPU_CONSDEV, CTL_EOL);
}
int waittime = -1;
void
cpu_reboot(howto, bootstr)
int howto;
char *bootstr;
{
/* take a snap shot before clobbering any registers */
if (curlwp->l_addr)
savectx(&curlwp->l_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*/
}
/*
* These variables are needed by /sbin/savecore
*/
u_int32_t 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 CLBYTES 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()
{
const struct bdevsw *bdev;
int nblks; /* size of dump area */
if (dumpdev == NODEV)
return;
bdev = bdevsw_lookup(dumpdev);
if (bdev == NULL) {
dumpdev = NODEV;
return;
}
if (bdev->d_psize == NULL)
return;
nblks = (*bdev->d_psize)(dumpdev);
if (nblks <= ctod(1))
return;
/*
* XXX include the final RAM page which is not included in physmem.
*/
dumpsize = physmem + 1;
/* Always skip the first CLBYTES, in case there is a label there. */
if (dumplo < ctod(1))
dumplo = ctod(1);
/* Put dump at end of partition, and make it fit. */
if (dumpsize > dtoc(nblks - dumplo))
dumpsize = dtoc(nblks - dumplo);
if (dumplo < nblks - ctod(dumpsize))
dumplo = nblks - ctod(dumpsize);
}
/*
* Dump physical memory onto the dump device. Called by doadump()
* in locore.s or by cpu_reboot() here in machdep.c
*/
void
dumpsys()
{
const struct bdevsw *bdev;
daddr_t blkno; /* current block to write */
/* dump routine */
int (*dump) __P((dev_t, daddr_t, void *, size_t));
int pg; /* page being dumped */
vm_offset_t maddr; /* PA being dumped */
int error; /* error code from (*dump)() */
/* Don't put dump messages in msgbuf. */
msgbufmapped = 0;
/* Make sure dump device is valid. */
if (dumpdev == NODEV)
return;
bdev = bdevsw_lookup(dumpdev);
if (bdev == NULL)
return;
if (dumpsize == 0) {
cpu_dumpconf();
if (dumpsize == 0)
return;
}
if (dumplo < 0)
return;
dump = bdev->d_dump;
blkno = dumplo;
printf("\ndumping to dev 0x%x, offset %ld\n", dumpdev, dumplo);
printf("dump ");
maddr = lowram;
for (pg = 0; pg < dumpsize; pg++) {
#define NPGMB (1024*1024/PAGE_SIZE)
/* print out how many MBs we have dumped */
if (pg && (pg % NPGMB) == 0)
printf("%d ", pg / NPGMB);
#undef NPGMB
pmap_enter(pmap_kernel(), (vm_offset_t)vmmap, maddr,
VM_PROT_READ, VM_PROT_READ|PMAP_WIRED);
pmap_update(pmap_kernel());
error = (*dump)(dumpdev, blkno, vmmap, PAGE_SIZE);
switch (error) {
case 0:
maddr += PAGE_SIZE;
blkno += btodb(PAGE_SIZE);
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
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)
void *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)
void *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);
}
#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;
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;
printf("NMI\n");
#if defined(DDB) || defined(KGDB)
Debugger();
#endif
innmihand = 0;
}
/*
* 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(l, epp)
struct lwp *l;
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(l, epp);
return (error);
#endif
#ifdef COMPAT_44
case (MID_HP300 << 16) | ZMAGIC:
error = exec_aout_prep_oldzmagic(l, epp);
return (error);
#endif
}
#endif /* !(defined(COMPAT_NOMID) || defined(COMPAT_44)) */
return ENOEXEC;
}