File: [cvs.NetBSD.org] / src / sys / arch / luna68k / luna68k / machdep.c (download)
Revision 1.41, Sun Jun 5 09:08:48 2005 UTC (18 years, 9 months ago) by he
Branch: MAIN
CVS Tags: yamt-vop-base2, yamt-vop-base, thorpej-vnode-attr-base, thorpej-vnode-attr Branch point for: yamt-vop, yamt-lazymbuf
Changes since 1.40: +5 -5
lines
Adapt to compiling with -Wcast-qual by sprinkling consts around.
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/* $NetBSD: machdep.c,v 1.41 2005/06/05 09:08:48 he Exp $ */
/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Tohru Nishimura.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.41 2005/06/05 09:08:48 he Exp $");
#include "opt_ddb.h"
#include "opt_kgdb.h"
#include "opt_compat_sunos.h"
#include "opt_panicbutton.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/buf.h>
#include <sys/reboot.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/device.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/core.h>
#include <sys/kcore.h>
#include <sys/vnode.h>
#include <sys/sa.h>
#include <sys/syscallargs.h>
#include <sys/ksyms.h>
#ifdef KGDB
#include <sys/kgdb.h>
#endif
#include <sys/boot_flag.h>
#include <uvm/uvm_extern.h>
#include <sys/sysctl.h>
#include <machine/cpu.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>
#if defined(DDB)
#include <machine/db_machdep.h>
#include <ddb/db_sym.h>
#include <ddb/db_extern.h>
#endif
#include "ksyms.h"
/*
* Info for CTL_HW
*/
char machine[] = MACHINE;
char cpu_model[60];
/* 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;
caddr_t msgbufaddr;
int maxmem; /* max memory per process */
int physmem; /* set by locore */
/*
* safepri is a safe priority for sleep to set for a spin-wait
* during autoconfiguration or after a panic.
*/
int safepri = PSL_LOWIPL;
void luna68k_init __P((void));
void identifycpu __P((void));
void dumpsys __P((void));
void straytrap __P((int, u_short));
void nmihand __P((struct frame));
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));
/*
* Machine-independent crash dump header info.
*/
cpu_kcore_hdr_t cpu_kcore_hdr;
int machtype; /* model: 1 for LUNA-1, 2 for LUNA-2 */
int sysconsole; /* console: 0 for ttya, 1 for video */
extern struct consdev syscons;
extern void omfb_cnattach __P((void));
extern void ws_cnattach __P((void));
extern void syscnattach __P((int));
/*
* On the 68020/68030, the value of delay_divisor is roughly
* 2048 / cpuspeed (where cpuspeed is in MHz).
*
* On the 68040/68060(?), the value of delay_divisor is roughly
* 759 / cpuspeed (where cpuspeed is in MHz).
* XXX -- is the above formula correct?
*/
int cpuspeed = 25; /* only used for printing later */
int delay_divisor = 300; /* for delay() loop count */
/*
* Early initialization, before main() is called.
*/
void
luna68k_init()
{
volatile unsigned char *pio0 = (void *)0x49000000;
int sw1, i;
char *cp;
extern char bootarg[64];
extern paddr_t avail_start, avail_end;
/*
* Tell the VM system about available physical memory. The
* luna68k only has one segment.
*/
uvm_page_physload(atop(avail_start), atop(avail_end),
atop(avail_start), atop(avail_end), VM_FREELIST_DEFAULT);
/*
* 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));
pio0[3] = 0xb6;
pio0[2] = 1 << 6; /* enable parity check */
pio0[3] = 0xb6;
sw1 = pio0[0]; /* dipssw1 value */
sw1 ^= 0xff;
sysconsole = !(sw1 & 0x2); /* console selection */
boothowto = 0;
i = 0;
/*
* 'bootarg' has;
* "<args of x command> ENADDR=<addr> HOST=<host> SERVER=<name>"
* where <addr> is MAC address of which network loader used (not
* necessarily same as one at 0x4101.FFE0), <host> and <name>
* are the values of HOST and SERVER environment variables,
*
* NetBSD/luna68k cares only the first argment; any of "sda".
*/
for (cp = bootarg; *cp != ' '; cp++) {
BOOT_FLAG(*cp, boothowto);
if (i++ >= sizeof(bootarg))
break;
}
#if 0 /* overload 1:sw1, which now means 'go ROM monitor' after poweron */
if (boothowto == 0)
boothowto = (sw1 & 0x1) ? RB_SINGLE : 0;
#endif
}
/*
* Console initialization: called early on from main,
*/
void
consinit()
{
if (sysconsole == 0)
syscnattach(0);
else {
omfb_cnattach();
ws_cnattach();
}
#if NKSYMS || defined(DDB) || defined(LKM)
{
extern int end;
extern int *esym;
ksyms_init(*(int *)&end, ((int *)&end) + 1, esym);
}
#endif
#ifdef DDB
if (boothowto & RB_KDB)
cpu_Debugger();
#endif
}
/*
* cpu_startup: allocate memory for variable-sized tables.
*/
void
cpu_startup()
{
vaddr_t minaddr, maxaddr;
char pbuf[9];
extern void greeting __P((void));
if (fputype != FPU_NONE)
m68k_make_fpu_idle_frame();
/*
* Initialize the kernel crash dump header.
*/
cpu_init_kcore_hdr();
/*
* Good {morning,afternoon,evening,night}.
*/
printf("%s%s", copyright, version);
identifycpu();
format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
printf("total memory = %s\n", pbuf);
minaddr = 0;
/*
* 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);
format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
printf("avail memory = %s\n", pbuf);
/*
* Say "Hi" to the world
*/
greeting();
}
/*
* Set registers on exec.
*/
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;
extern int fputype;
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);
}
void
identifycpu()
{
extern int cputype;
const char *cpu;
bzero(cpu_model, sizeof(cpu_model));
switch (cputype) {
case CPU_68030:
cpu = "MC68030 CPU+MMU, MC68882 FPU";
machtype = LUNA_I;
cpuspeed = 20; delay_divisor = 102; /* 20MHz 68030 */
hz = 60;
break;
#if defined(M68040)
case CPU_68040:
cpu = "MC68040 CPU+MMU+FPU, 4k on-chip physical I/D caches";
machtype = LUNA_II;
cpuspeed = 25; delay_divisor = 300; /* 25MHz 68040 */
break;
#endif
default:
panic("unknown CPU type");
}
strcpy(cpu_model, cpu);
printf("%s\n", cpu_model);
}
/*
* 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)
volatile int howto; /* XXX to shutup GCC XXX */
char *bootstr;
{
extern void doboot __P((void));
/* take a snap shot before clobbering any registers */
if (curlwp && curlwp->l_addr)
savectx(&curlwp->l_addr->u_pcb);
/* If system is hold, 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();
/* Finally, halt/reboot the system. */
if ((howto & RB_POWERDOWN) == RB_POWERDOWN) {
u_int8_t *pio = (void *)0x4d000000;
printf("power is going down.\n");
DELAY(100000);
pio[3] = 0x94;
pio[2] = 0 << 4;
for (;;) /* NOP */;
}
if (howto & RB_HALT) {
printf("System halted. Hit any key to reboot.\n\n");
(void)cngetc();
}
printf("rebooting...\n");
DELAY(100000);
doboot();
/*NOTREACHED*/
while (1) ;
}
/*
* 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 char end[];
bzero(&cpu_kcore_hdr, sizeof(cpu_kcore_hdr));
/*
* Initialize the `dispatcher' portion of the header.
*/
strcpy(h->name, machine);
h->page_size = PAGE_SIZE;
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
*
* Since we're linked and loaded at the same place,
* and the kernel is mapped va == pa, this is 0.
*/
m->reloc = 0;
/*
* Define the end of the relocatable range.
*/
m->relocend = (u_int32_t)end;
/*
* The luna68k has one contiguous memory segment.
*/
m->ram_segs[0].start = 0 /* 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_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 PAGE_SIZE 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 chdrsize; /* size of dump header */
int nblks; /* size of dump area */
if (dumpdev == NODEV)
return;
bdev = bdevsw_lookup(dumpdev);
if (bdev == NULL)
panic("dumpconf: bad dumpdev=0x%x", dumpdev);
if (bdev->d_psize == NULL)
return;
nblks = (*bdev->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 PAGE_SIZE 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()
{
const struct bdevsw *bdev;
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 = 0 /* lowram */;
pg = 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) {
printf("\ndump to dev %u,%u not possible\n", major(dumpdev),
minor(dumpdev));
return;
}
dump = bdev->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/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(), (vaddr_t)vmmap, maddr,
VM_PROT_READ, VM_PROT_READ|PMAP_WIRED);
pmap_update(pmap_kernel());
error = (*dump)(dumpdev, blkno, vmmap, PAGE_SIZE);
bad:
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);
}
int *nofault;
int
badaddr(addr, nbytes)
register caddr_t addr;
int nbytes;
{
register int i;
label_t faultbuf;
#ifdef lint
i = *addr; if (i) return (0);
#endif
nofault = (int *) &faultbuf;
if (setjmp((label_t *)nofault)) {
nofault = (int *) 0;
return(1);
}
switch (nbytes) {
case 1:
i = *(volatile char *)addr;
break;
case 2:
i = *(volatile short *)addr;
break;
case 4:
i = *(volatile int *)addr;
break;
default:
panic("badaddr: bad request");
}
nofault = (int *) 0;
return (0);
}
void luna68k_abort __P((const char *));
static int innmihand; /* simple mutex */
/*
* Level 7 interrupts are caused by e.g. the ABORT switch.
*
* If we have DDB, then break into DDB on ABORT. In a production
* environment, bumping the ABORT switch would be bad, so we enable
* panic'ing on ABORT with the kernel option "PANICBUTTON".
*/
void
nmihand(frame)
struct frame frame;
{
/* Prevent unwanted recursion */
if (innmihand)
return;
innmihand = 1;
luna68k_abort("ABORT SWITCH");
}
/*
* Common code for handling ABORT signals from buttons, switches,
* serial lines, etc.
*/
void
luna68k_abort(cp)
const char *cp;
{
#ifdef DDB
printf("%s\n", cp);
cpu_Debugger();
#else
#ifdef PANICBUTTON
panic(cp);
#else
printf("%s ignored\n", cp);
#endif /* PANICBUTTON */
#endif /* DDB */
}
/*
* 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.
*/
int
cpu_exec_aout_makecmds(p, epp)
struct proc *p;
struct exec_package *epp;
{
int error = ENOEXEC;
#ifdef COMPAT_SUNOS
extern sunos_exec_aout_makecmds
__P((struct proc *, struct exec_package *));
if ((error = sunos_exec_aout_makecmds(p, epp)) == 0)
return 0;
#endif
return error;
}
/*
* Return the best possible estimate of the time in the timeval
* to which tvp points. Unfortunately, we can't read the hardware registers.
* We guarantee that the time will be greater than the value obtained by a
* previous call.
*/
void
microtime(tvp)
register struct timeval *tvp;
{
int s = splclock();
static struct timeval lasttime;
*tvp = time;
#ifdef notdef
tvp->tv_usec += clkread();
while (tvp->tv_usec >= 1000000) {
tvp->tv_sec++;
tvp->tv_usec -= 1000000;
}
#endif
if (tvp->tv_sec == lasttime.tv_sec &&
tvp->tv_usec <= lasttime.tv_usec &&
(tvp->tv_usec = lasttime.tv_usec + 1) >= 1000000) {
tvp->tv_sec++;
tvp->tv_usec -= 1000000;
}
lasttime = *tvp;
splx(s);
}
#if 1
struct consdev *cn_tab = &syscons;
#else
/*
* romcons is useful until m68k TC register is initialized.
*/
int romcngetc __P((dev_t));
void romcnputc __P((dev_t, int));
struct consdev romcons = {
NULL,
NULL,
romcngetc,
romcnputc,
nullcnpollc,
makedev(7, 0), /* XXX */
CN_DEAD,
};
struct consdev *cn_tab = &romcons;
#define __ ((int **)0x41000000)
#define GETC() (*(int (*)())__[6])()
#define PUTC(x) (*(void (*)())__[7])(x)
#define ROMPUTC(x) \
({ \
register _r; \
asm volatile (" \
movc %%vbr,%0 ; \
movel %0,%%sp@- ; \
clrl %0 ; \
movc %0,%%vbr" \
: "=r" (_r)); \
PUTC(x); \
asm volatile (" \
movel %%sp@+,%0 ; \
movc %0,%%vbr" \
: "=r" (_r)); \
})
#define ROMGETC() \
({ \
register _r, _c; \
asm volatile (" \
movc %%vbr,%0 ; \
movel %0,%%sp@- ; \
clrl %0 ; \
movc %0,%%vbr" \
: "=r" (_r)); \
_c = GETC(); \
asm volatile (" \
movel %%sp@+,%0 ; \
movc %0,%%vbr" \
: "=r" (_r)); \
_c; \
})
void
romcnputc(dev, c)
dev_t dev;
int c;
{
int s;
s = splhigh();
ROMPUTC(c);
splx(s);
}
int
romcngetc(dev)
dev_t dev;
{
int s, c;
do {
s = splhigh();
c = ROMGETC();
splx(s);
} while (c == -1);
return c;
}
#endif