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NetBSD/sys/arch/amiga/amiga/machdep.c

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/* $NetBSD: machdep.c,v 1.139 1999/07/01 20:14:42 is Exp $ */
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1986, 1990 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 $Hdr: machdep.c 1.63 91/04/24$
*
* @(#)machdep.c 7.16 (Berkeley) 6/3/91
*/
#include "opt_ddb.h"
#include "opt_inet.h"
#include "opt_atalk.h"
#include "opt_iso.h"
#include "opt_ns.h"
#include "opt_compat_netbsd.h"
#include <sys/param.h>
#include <sys/systm.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/callout.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/msgbuf.h>
#include <sys/user.h>
#include <sys/exec.h> /* for PS_STRINGS */
#include <sys/vnode.h>
#include <sys/device.h>
#include <sys/queue.h>
#include <sys/mount.h>
#include <sys/syscallargs.h>
#include <sys/core.h>
#include <sys/kcore.h>
#include <net/netisr.h>
#define MAXMEM 64*1024*CLSIZE /* XXX - from cmap.h */
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <vm/vm_kern.h>
#include <vm/vm_page.h>
#include <uvm/uvm_extern.h>
#include <sys/sysctl.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>
#include <amiga/amiga/isr.h>
#include <amiga/amiga/custom.h>
#ifdef DRACO
#include <amiga/amiga/drcustom.h>
#include <m68k/include/asm_single.h>
#endif
#include <amiga/amiga/cia.h>
#include <amiga/amiga/cc.h>
#include <amiga/amiga/memlist.h>
#include "fd.h"
#include "ser.h"
#include "arp.h"
#include "ppp.h"
#include <net/netisr.h>
#include <net/if.h>
#ifdef INET
#include <netinet/in.h>
#if NARP > 0
#include <netinet/if_inarp.h>
#endif
#include <netinet/ip_var.h>
#endif
#ifdef INET6
# ifndef INET
# include <netinet/in.h>
# endif
#include <netinet6/ip6.h>
#include <netinet6/ip6_var.h>
#endif
#ifdef NS
#include <netns/ns_var.h>
#endif
#ifdef ISO
#include <netiso/iso.h>
#include <netiso/clnp.h>
#endif
#ifdef NETATALK
#include <netatalk/at_extern.h>
#endif
#if NPPP > 0
#include <net/ppp_defs.h>
#include <net/if_ppp.h>
#endif
/* prototypes */
void identifycpu __P((void));
vm_offset_t reserve_dumppages __P((vm_offset_t));
void dumpsys __P((void));
void initcpu __P((void));
void straytrap __P((int, u_short));
static void netintr __P((void));
static void call_sicallbacks __P((void));
static void _softintr_callit __P((void *, void *));
void intrhand __P((int));
#if NSER > 0
void ser_outintr __P((void));
#endif
#if NFD > 0
void fdintr __P((int));
#endif
/*
* patched by some devices at attach time (currently, only the coms)
*/
u_int16_t amiga_serialspl = PSL_S|PSL_IPL4;
vm_map_t exec_map = NULL;
vm_map_t mb_map = NULL;
vm_map_t phys_map = NULL;
caddr_t msgbufaddr;
vm_offset_t msgbufpa;
int maxmem; /* max memory per process */
int physmem = MAXMEM; /* max supported memory, changes to actual */
/*
* extender "register" for software interrupts. Moved here
* from locore.s, since softints are no longer dealt with
* in locore.s.
*/
unsigned char ssir;
/*
* safepri is a safe priority for sleep to set for a spin-wait
* during autoconfiguration or after a panic.
*/
int safepri = PSL_LOWIPL;
extern int freebufspace;
extern u_int lowram;
/* used in init_main.c */
char *cpu_type = "m68k";
/* the following is used externally (sysctl_hw) */
char machine[] = MACHINE; /* from <machine/param.h> */
/*
* current open serial device speed; used by some SCSI drivers to reduce
* DMA transfer lengths.
*/
int ser_open_speed;
/*
* Console initialization: called early on from main,
* before vm init or startup. Do enough configuration
* to choose and initialize a console.
*/
void
consinit()
{
/* initialize custom chip interface */
#ifdef DRACO
if (is_draco()) {
/* XXX to be done */
} else
#endif
custom_chips_init();
/*
* Initialize the console before we print anything out.
*/
cninit();
#if defined (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()
{
register unsigned i;
caddr_t v;
int base, residual;
char pbuf[9];
#ifdef DEBUG
extern int pmapdebug;
int opmapdebug = pmapdebug;
#endif
vm_offset_t minaddr, maxaddr;
vm_size_t size = 0;
/*
* Initialize error message buffer (at end of core).
*/
#ifdef DEBUG
pmapdebug = 0;
#endif
/*
* pmap_bootstrap has positioned this at the end of kernel
* memory segment - map and initialize it now.
*/
for (i = 0; i < btoc(MSGBUFSIZE); i++)
pmap_enter(pmap_kernel(), (vm_offset_t)msgbufaddr + i * NBPG,
msgbufpa + i * NBPG, VM_PROT_READ|VM_PROT_WRITE, TRUE,
VM_PROT_READ|VM_PROT_WRITE);
initmsgbuf(msgbufaddr, m68k_round_page(MSGBUFSIZE));
/*
* 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, (vm_offset_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 = (vm_offset_t) buffers;
if ((bufpages / nbuf) >= btoc(MAXBSIZE)) {
/* don't want to alloc more physical mem than needed */
bufpages = btoc(MAXBSIZE) * nbuf;
}
base = bufpages / nbuf;
residual = bufpages % nbuf;
for (i = 0; i < nbuf; i++) {
vm_size_t curbufsize;
vm_offset_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 = (vm_offset_t) buffers + (i * MAXBSIZE);
curbufsize = CLBYTES * ((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");
#if defined(PMAP_NEW)
pmap_kenter_pgs(curbuf, &pg, 1);
#else
pmap_enter(kernel_map->pmap, curbuf,
VM_PAGE_TO_PHYS(pg), VM_PROT_READ|VM_PROT_WRITE,
TRUE, VM_PROT_READ|VM_PROT_WRITE);
#endif
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);
/*
* Initialize callouts
*/
callfree = callout;
for (i = 1; i < ncallout; i++)
callout[i-1].c_next = &callout[i];
#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 * CLBYTES);
printf("using %d buffers containing %s of memory\n", nbuf, pbuf);
/*
* display memory configuration passed from loadbsd
*/
if (memlist->m_nseg > 0 && memlist->m_nseg < 16)
for (i = 0; i < memlist->m_nseg; i++)
printf("memory segment %d at %08x size %08x\n", i,
memlist->m_seg[i].ms_start,
memlist->m_seg[i].ms_size);
#ifdef DEBUG_KERNEL_START
printf("calling initcpu...\n");
#endif
/*
* Set up CPU-specific registers, cache, etc.
*/
initcpu();
#ifdef DEBUG_KERNEL_START
printf("survived initcpu...\n");
#endif
/*
* Set up buffers, so they can be used to read disk labels.
*/
bufinit();
#ifdef DEBUG_KERNEL_START
printf("survived bufinit...\n");
#endif
}
/*
* Set registers on exec.
*/
void
setregs(p, pack, stack)
register 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;
#ifdef FPU_EMULATE
if (!fputype)
bzero(&p->p_addr->u_pcb.pcb_fpregs, sizeof(struct fpframe));
else
#endif
m68881_restore(&p->p_addr->u_pcb.pcb_fpregs);
}
/*
* Info for CTL_HW
*/
char cpu_model[120];
extern char version[];
#if defined(M68060)
int m68060_pcr_init = 0x21; /* make this patchable */
#endif
void
identifycpu()
{
/* there's alot of XXX in here... */
char *mach, *mmu, *fpu;
#ifdef M68060
char cpubuf[16];
u_int32_t pcr;
#endif
#ifdef DRACO
char machbuf[16];
if (is_draco()) {
sprintf(machbuf, "DraCo rev.%d", is_draco());
mach = machbuf;
} else
#endif
if (is_a4000())
mach = "Amiga 4000";
else if (is_a3000())
mach = "Amiga 3000";
else if (is_a1200())
mach = "Amiga 1200";
else
mach = "Amiga 500/2000";
fpu = NULL;
#ifdef M68060
if (machineid & AMIGA_68060) {
asm(".word 0x4e7a,0x0808; movl d0,%0" : "=d"(pcr) : : "d0");
sprintf(cpubuf, "68%s060 rev.%d",
pcr & 0x10000 ? "LC/EC" : "", (pcr>>8)&0xff);
cpu_type = cpubuf;
mmu = "/MMU";
if (pcr & 2) {
fpu = "/FPU disabled";
fputype = FPU_NONE;
} else if (m68060_pcr_init & 2){
fpu = "/FPU will be disabled";
fputype = FPU_NONE;
} else if (machineid & AMIGA_FPU40) {
fpu = "/FPU";
fputype = FPU_68040; /* XXX */
}
} else
#endif
if (machineid & AMIGA_68040) {
cpu_type = "m68040";
mmu = "/MMU";
fpu = "/FPU";
fputype = FPU_68040; /* XXX */
} else if (machineid & AMIGA_68030) {
cpu_type = "m68030"; /* XXX */
mmu = "/MMU";
} else {
cpu_type = "m68020";
mmu = " m68851 MMU";
}
if (fpu == NULL) {
if (machineid & AMIGA_68882) {
fpu = " m68882 FPU";
fputype = FPU_68882;
} else if (machineid & AMIGA_68881) {
fpu = " m68881 FPU";
fputype = FPU_68881;
} else {
fpu = " no FPU";
fputype = FPU_NONE;
}
}
sprintf(cpu_model, "%s (%s CPU%s%s)", mach, cpu_type, mmu, fpu);
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 */
}
static int waittime = -1;
void
bootsync(void)
{
if (waittime < 0) {
waittime = 0;
vfs_shutdown();
/*
* If we've been adjusting the clock, the todr
* will be out of synch; adjust it now.
*/
resettodr();
}
}
void
cpu_reboot(howto, bootstr)
register int howto;
char *bootstr;
{
/* take a snap shot before clobbering any registers */
if (curproc)
savectx(&curproc->p_addr->u_pcb);
boothowto = howto;
if ((howto & RB_NOSYNC) == 0)
bootsync();
/* Disable interrupts. */
spl7();
/* If rebooting and a dump is requested do it. */
if (howto & RB_DUMP)
dumpsys();
if (howto & RB_HALT) {
printf("\n");
printf("The operating system has halted.\n");
printf("Please press any key to reboot.\n\n");
cngetc();
}
printf("rebooting...\n");
DELAY(1000000);
doboot();
/*NOTREACHED*/
}
unsigned dumpmag = 0x8fca0101; /* magic number for savecore */
int dumpsize = 0; /* also for savecore */
long dumplo = 0;
cpu_kcore_hdr_t cpu_kcore_hdr;
void
cpu_dumpconf()
{
cpu_kcore_hdr_t *h = &cpu_kcore_hdr;
struct m68k_kcore_hdr *m = &h->un._m68k;
int nblks;
int i;
extern u_int Sysseg_pa;
extern int end[];
bzero(&cpu_kcore_hdr, sizeof(cpu_kcore_hdr));
/*
* Intitialize 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 the pointer to the kernel segment table.
*/
m->sysseg_pa = Sysseg_pa;
/*
* 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;
/* XXX new corefile format, single segment + chipmem */
dumpsize = physmem;
m->ram_segs[0].start = lowram;
m->ram_segs[0].size = ctob(physmem);
for (i = 0; i < memlist->m_nseg; i++) {
if ((memlist->m_seg[i].ms_attrib & MEMF_CHIP) == 0)
continue;
dumpsize += btoc(memlist->m_seg[i].ms_size);
m->ram_segs[1].start = 0;
m->ram_segs[1].size = memlist->m_seg[i].ms_size;
break;
}
if (dumpdev != NODEV && bdevsw[major(dumpdev)].d_psize) {
nblks = (*bdevsw[major(dumpdev)].d_psize)(dumpdev);
if (dumpsize > btoc(dbtob(nblks - dumplo)))
dumpsize = btoc(dbtob(nblks - dumplo));
else if (dumplo == 0)
dumplo = nblks - btodb(ctob(dumpsize));
}
--dumplo; /* XXX assume header fits in one block */
/*
* Don't dump on the first CLBYTES (why CLBYTES?)
* in case the dump device includes a disk label.
*/
if (dumplo < btodb(CLBYTES))
dumplo = btodb(CLBYTES);
}
/*
* Doadump comes here after turning off memory management and
* getting on the dump stack, either when called above, or by
* the auto-restart code.
*/
#define BYTES_PER_DUMP MAXPHYS /* Must be a multiple of pagesize XXX small */
static vm_offset_t dumpspace;
vm_offset_t
reserve_dumppages(p)
vm_offset_t p;
{
dumpspace = p;
return (p + BYTES_PER_DUMP);
}
void
dumpsys()
{
unsigned bytes, i, n, seg;
int maddr, psize;
daddr_t blkno;
int (*dump) __P((dev_t, daddr_t, caddr_t, size_t));
int error = 0;
kcore_seg_t *kseg_p;
cpu_kcore_hdr_t *chdr_p;
char dump_hdr[dbtob(1)]; /* XXX assume hdr fits in 1 block */
msgbufenabled = 0;
if (dumpdev == NODEV)
return;
/*
* For dumps during autoconfiguration,
* if dump device has already configured...
*/
if (dumpsize == 0)
cpu_dumpconf();
if (dumplo <= 0) {
printf("\ndump to dev %u,%u not possible\n", major(dumpdev),
minor(dumpdev));
return;
}
printf("\ndumping to dev %u,%u offset %ld\n", major(dumpdev),
minor(dumpdev), dumplo);
psize = (*bdevsw[major(dumpdev)].d_psize)(dumpdev);
printf("dump ");
if (psize == -1) {
printf("area unavailable.\n");
return;
}
kseg_p = (kcore_seg_t *)dump_hdr;
chdr_p = (cpu_kcore_hdr_t *)&dump_hdr[ALIGN(sizeof(*kseg_p))];
bzero(dump_hdr, sizeof(dump_hdr));
/*
* Generate a segment header
*/
CORE_SETMAGIC(*kseg_p, KCORE_MAGIC, MID_MACHINE, CORE_CPU);
kseg_p->c_size = dbtob(1) - ALIGN(sizeof(*kseg_p));
/*
* Add the md header
*/
*chdr_p = cpu_kcore_hdr;
bytes = ctob(dumpsize);
maddr = cpu_kcore_hdr.un._m68k.ram_segs[0].start;
seg = 0;
blkno = dumplo;
dump = bdevsw[major(dumpdev)].d_dump;
error = (*dump) (dumpdev, blkno++, (caddr_t)dump_hdr, dbtob(1));
for (i = 0; i < bytes && error == 0; i += n) {
/* Print out how many MBs we have to go. */
n = bytes - i;
if (n && (n % (1024 * 1024)) == 0)
printf("%d ", n / (1024 * 1024));
/* Limit size for next transfer. */
if (n > BYTES_PER_DUMP)
n = BYTES_PER_DUMP;
if (maddr == 0) { /* XXX kvtop chokes on this */
maddr += NBPG;
n -= NBPG;
i += NBPG;
++blkno; /* XXX skip physical page 0 */
}
(void) pmap_map(dumpspace, maddr, maddr + n, VM_PROT_READ);
error = (*dump) (dumpdev, blkno, (caddr_t) dumpspace, n);
if (error)
break;
maddr += n;
blkno += btodb(n); /* XXX? */
if (maddr >= (cpu_kcore_hdr.un._m68k.ram_segs[seg].start +
cpu_kcore_hdr.un._m68k.ram_segs[seg].size)) {
++seg;
maddr = cpu_kcore_hdr.un._m68k.ram_segs[seg].start;
if (cpu_kcore_hdr.un._m68k.ram_segs[seg].size == 0)
break;
}
}
switch (error) {
case ENXIO:
printf("device bad\n");
break;
case EFAULT:
printf("device not ready\n");
break;
case EINVAL:
printf("area improper\n");
break;
case EIO:
printf("i/o error\n");
break;
default:
printf("succeeded\n");
break;
}
printf("\n\n");
delay(5000000); /* 5 seconds */
}
/*
* Return the best possible estimate of the time in the timeval
* to which tvp points. We do this by returning the current time
* plus the amount of time since the last clock interrupt (clock.c:clkread).
*
* Check that this time is no less than any previously-reported time,
* which could happen around the time of a clock adjustment. Just for fun,
* 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 = spl7();
static struct timeval lasttime;
*tvp = time;
tvp->tv_usec += clkread();
while (tvp->tv_usec > 1000000) {
tvp->tv_sec++;
tvp->tv_usec -= 1000000;
}
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);
}
void
initcpu()
{
typedef void trapfun __P((void));
/* XXX should init '40 vecs here, too */
#if defined(M68060) || defined(M68040) || defined(DRACO) || defined(FPU_EMULATE)
extern trapfun *vectab[256];
#endif
#if defined(M68060) || defined(M68040)
extern trapfun addrerr4060;
#endif
#ifdef M68060
extern trapfun buserr60;
#if defined(M060SP)
/*extern u_int8_t I_CALL_TOP[];*/
extern trapfun intemu60, fpiemu60, fpdemu60, fpeaemu60;
extern u_int8_t FP_CALL_TOP[];
#else
extern trapfun illinst;
#endif
extern trapfun fpfault;
#endif
#ifdef M68040
extern trapfun buserr40;
#endif
#ifdef DRACO
extern trapfun DraCoIntr, DraCoLev1intr, DraCoLev2intr;
u_char dracorev;
#endif
#ifdef FPU_EMULATE
extern trapfun fpemuli;
#endif
#ifdef M68060
if (machineid & AMIGA_68060) {
if (machineid & AMIGA_FPU40 && m68060_pcr_init & 2) {
/*
* in this case, we're about to switch the FPU off;
* do a FNOP to avoid stray FP traps later
*/
__asm("fnop");
/* ... and mark FPU as absent for identifyfpu() */
machineid &= ~(AMIGA_FPU40|AMIGA_68882|AMIGA_68881);
}
asm volatile ("movl %0,d0; .word 0x4e7b,0x0808" : :
"d"(m68060_pcr_init):"d0" );
/* bus/addrerr vectors */
vectab[2] = buserr60;
vectab[3] = addrerr4060;
#if defined(M060SP)
/* integer support */
vectab[61] = intemu60/*(trapfun *)&I_CALL_TOP[128 + 0x00]*/;
/* floating point support */
/*
* XXX maybe we really should run-time check for the
* stack frame format here:
*/
vectab[11] = fpiemu60/*(trapfun *)&FP_CALL_TOP[128 + 0x30]*/;
vectab[55] = fpdemu60/*(trapfun *)&FP_CALL_TOP[128 + 0x38]*/;
vectab[60] = fpeaemu60/*(trapfun *)&FP_CALL_TOP[128 + 0x40]*/;
vectab[54] = (trapfun *)&FP_CALL_TOP[128 + 0x00];
vectab[52] = (trapfun *)&FP_CALL_TOP[128 + 0x08];
vectab[53] = (trapfun *)&FP_CALL_TOP[128 + 0x10];
vectab[51] = (trapfun *)&FP_CALL_TOP[128 + 0x18];
vectab[50] = (trapfun *)&FP_CALL_TOP[128 + 0x20];
vectab[49] = (trapfun *)&FP_CALL_TOP[128 + 0x28];
#else
vectab[61] = illinst;
#endif
vectab[48] = fpfault;
}
#endif
/*
* Vector initialization for special motherboards
*/
#ifdef M68040
#ifdef M68060
else
#endif
if (machineid & AMIGA_68040) {
/* addrerr vector */
vectab[2] = buserr40;
vectab[3] = addrerr4060;
}
#endif
#ifdef FPU_EMULATE
if (!(machineid & (AMIGA_68881|AMIGA_68882|AMIGA_FPU40))) {
vectab[11] = fpemuli;
printf("FPU software emulation initialized.\n");
}
#endif
/*
* Vector initialization for special motherboards
*/
#ifdef DRACO
dracorev = is_draco();
if (dracorev) {
if (dracorev >= 4) {
vectab[24+1] = DraCoLev1intr;
vectab[24+2] = DraCoIntr;
} else {
vectab[24+1] = DraCoIntr;
vectab[24+2] = DraCoLev2intr;
}
vectab[24+3] = DraCoIntr;
vectab[24+4] = DraCoIntr;
vectab[24+5] = DraCoIntr;
vectab[24+6] = DraCoIntr;
}
#endif
}
void
straytrap(pc, evec)
int pc;
u_short evec;
{
printf("unexpected trap format %x (vector offset %x) from %x\n",
evec>>12, evec & 0xFFF, pc);
/*XXX*/ panic("straytrap");
}
int *nofault;
int
badaddr(addr)
register caddr_t addr;
{
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);
}
i = *(volatile short *)addr;
nofault = (int *) 0;
return(0);
}
int
badbaddr(addr)
register caddr_t addr;
{
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);
}
i = *(volatile char *)addr;
nofault = (int *) 0;
return(0);
}
static void
netintr()
{
#ifdef INET
#if NARP > 0
if (netisr & (1 << NETISR_ARP)) {
netisr &= ~(1 << NETISR_ARP);
arpintr();
}
#endif
if (netisr & (1 << NETISR_IP)) {
netisr &= ~(1 << NETISR_IP);
ipintr();
}
#endif
#ifdef INET6
if (netisr & (1 << NETISR_IPV6)) {
netisr &= ~(1 << NETISR_IPV6);
ip6intr();
}
#endif
#ifdef NETATALK
if (netisr & (1 << NETISR_ATALK)) {
netisr &= ~(1 << NETISR_ATALK);
atintr();
}
#endif
#ifdef NS
if (netisr & (1 << NETISR_NS)) {
netisr &= ~(1 << NETISR_NS);
nsintr();
}
#endif
#ifdef ISO
if (netisr & (1 << NETISR_ISO)) {
netisr &= ~(1 << NETISR_ISO);
clnlintr();
}
#endif
#if NPPP > 0
if (netisr & (1 << NETISR_PPP)) {
netisr &= ~(1 << NETISR_PPP);
pppintr();
}
#endif
}
/*
* this is a handy package to have asynchronously executed
* function calls executed at very low interrupt priority.
* Example for use is keyboard repeat, where the repeat
* handler running at splclock() triggers such a (hardware
* aided) software interrupt.
* Note: the installed functions are currently called in a
* LIFO fashion, might want to change this to FIFO
* later.
*/
struct si_callback {
struct si_callback *next;
void (*function) __P((void *rock1, void *rock2));
void *rock1, *rock2;
};
static struct si_callback *si_callbacks;
static struct si_callback *si_free;
#ifdef DIAGNOSTIC
static int ncb; /* number of callback blocks allocated */
static int ncbd; /* number of callback blocks dynamically allocated */
#endif
/*
* these are __GENERIC_SOFT_INTERRUPT wrappers; will be replaced
* once by the real thing once all drivers are converted.
*
* to help performance for converted drivers, the YYY_sicallback() function
* family can be implemented in terms of softintr_XXX() as an intermediate
* measure.
*/
static void
_softintr_callit(rock1, rock2)
void *rock1, *rock2;
{
(*(void (*)(void *))rock1)(rock2);
}
void *
softintr_establish(ipl, func, arg)
int ipl;
void func __P((void *));
void *arg;
{
struct si_callback *si;
(void)ipl;
si = (struct si_callback *)malloc(sizeof(*si), M_TEMP, M_NOWAIT);
if (si == NULL)
return (si);
si->function = (void *)0;
si->rock1 = (void *)func;
si->rock2 = arg;
alloc_sicallback();
return ((void *)si);
}
void
softintr_disestablish(hook)
void *hook;
{
/*
* XXX currently, there is a memory leak here; we cant free the
* sicallback structure.
* this will be automatically repaired once we rewirte the soft
* interupt functions.
*/
free(hook, M_TEMP);
}
void
alloc_sicallback()
{
struct si_callback *si;
int s;
si = (struct si_callback *)malloc(sizeof(*si), M_TEMP, M_NOWAIT);
if (si == NULL)
return;
s = splhigh();
si->next = si_free;
si_free = si;
splx(s);
#ifdef DIAGNOSTIC
++ncb;
#endif
}
void
softintr_schedule(vsi)
void *vsi;
{
struct si_callback *si;
si = vsi;
add_sicallback(_softintr_callit, si->rock1, si->rock2);
}
void
add_sicallback (function, rock1, rock2)
void (*function) __P((void *rock1, void *rock2));
void *rock1, *rock2;
{
struct si_callback *si;
int s;
/*
* this function may be called from high-priority interrupt handlers.
* We may NOT block for memory-allocation in here!.
*/
s = splhigh();
si = si_free;
if (si != NULL)
si_free = si->next;
splx(s);
if (si == NULL) {
si = (struct si_callback *)malloc(sizeof(*si), M_TEMP, M_NOWAIT);
#ifdef DIAGNOSTIC
if (si)
++ncbd; /* count # dynamically allocated */
#endif
if (!si)
return;
}
si->function = function;
si->rock1 = rock1;
si->rock2 = rock2;
s = splhigh();
si->next = si_callbacks;
si_callbacks = si;
splx(s);
/*
* Cause a software interrupt (spl1). This interrupt might
* happen immediately, or after returning to a safe enough level.
*/
setsoftcback();
}
void
rem_sicallback(function)
void (*function) __P((void *rock1, void *rock2));
{
struct si_callback *si, *psi, *nsi;
int s;
s = splhigh();
for (psi = 0, si = si_callbacks; si; ) {
nsi = si->next;
if (si->function != function)
psi = si;
else {
/* free(si, M_TEMP); */
si->next = si_free;
si_free = si;
if (psi)
psi->next = nsi;
else
si_callbacks = nsi;
}
si = nsi;
}
splx(s);
}
/* purge the list */
static void
call_sicallbacks()
{
struct si_callback *si;
int s;
void *rock1, *rock2;
void (*function) __P((void *, void *));
do {
s = splhigh ();
if ((si = si_callbacks) != 0)
si_callbacks = si->next;
splx(s);
if (si) {
function = si->function;
rock1 = si->rock1;
rock2 = si->rock2;
/* si->function(si->rock1, si->rock2); */
/* free(si, M_TEMP); */
s = splhigh ();
si->next = si_free;
si_free = si;
splx(s);
function (rock1, rock2);
}
} while (si);
#ifdef DIAGNOSTIC
if (ncbd) {
ncb += ncbd;
printf("call_sicallback: %d more dynamic structures %d total\n",
ncbd, ncb);
ncbd = 0;
}
#endif
}
struct isr *isr_ports;
#ifdef DRACO
struct isr *isr_slot3;
struct isr *isr_supio;
#endif
struct isr *isr_exter;
void
add_isr(isr)
struct isr *isr;
{
struct isr **p, *q;
#ifdef DRACO
switch (isr->isr_ipl) {
case 2:
p = &isr_ports;
break;
case 3:
p = &isr_slot3;
break;
case 5:
p = &isr_supio;
break;
default: /* was case 6:; make gcc -Wall quiet */
p = &isr_exter;
break;
}
#else
p = isr->isr_ipl == 2 ? &isr_ports : &isr_exter;
#endif
while ((q = *p) != NULL)
p = &q->isr_forw;
isr->isr_forw = NULL;
*p = isr;
/* enable interrupt */
#ifdef DRACO
if (is_draco())
switch(isr->isr_ipl) {
case 6:
single_inst_bset_b(*draco_intena, DRIRQ_INT6);
break;
case 2:
single_inst_bset_b(*draco_intena, DRIRQ_INT2);
break;
default:
break;
}
else
#endif
custom.intena = isr->isr_ipl == 2 ?
INTF_SETCLR | INTF_PORTS :
INTF_SETCLR | INTF_EXTER;
}
void
remove_isr(isr)
struct isr *isr;
{
struct isr **p, *q;
#ifdef DRACO
switch (isr->isr_ipl) {
case 2:
p = &isr_ports;
break;
case 3:
p = &isr_slot3;
break;
case 5:
p = &isr_supio;
break;
default: /* XXX to make gcc -Wall quiet, was 6: */
p = &isr_exter;
break;
}
#else
p = isr->isr_ipl == 6 ? &isr_exter : &isr_ports;
#endif
while ((q = *p) != NULL && q != isr)
p = &q->isr_forw;
if (q)
*p = q->isr_forw;
else
panic("remove_isr: handler not registered");
/* disable interrupt if no more handlers */
#ifdef DRACO
switch (isr->isr_ipl) {
case 2:
p = &isr_ports;
break;
case 3:
p = &isr_slot3;
break;
case 5:
p = &isr_supio;
break;
case 6:
p = &isr_exter;
break;
}
#else
p = isr->isr_ipl == 6 ? &isr_exter : &isr_ports;
#endif
if (*p == NULL) {
#ifdef DRACO
if (is_draco()) {
switch(isr->isr_ipl) {
case 2:
single_inst_bclr_b(*draco_intena,
DRIRQ_INT2);
break;
case 6:
single_inst_bclr_b(*draco_intena,
DRIRQ_INT6);
break;
default:
break;
}
} else
#endif
custom.intena = isr->isr_ipl == 6 ?
INTF_EXTER : INTF_PORTS;
}
}
void
intrhand(sr)
int sr;
{
register unsigned int ipl;
register unsigned short ireq;
register struct isr **p, *q;
ipl = (sr >> 8) & 7;
#ifdef REALLYDEBUG
printf("intrhand: got int. %d\n", ipl);
#endif
#ifdef DRACO
if (is_draco())
ireq = ((ipl == 1) && (*draco_intfrc & DRIRQ_SOFT) ?
INTF_SOFTINT : 0);
else
#endif
ireq = custom.intreqr;
switch (ipl) {
case 1:
#ifdef DRACO
if (is_draco() && (draco_ioct->io_status & DRSTAT_KBDRECV))
drkbdintr();
#endif
if (ireq & INTF_TBE) {
#if NSER > 0
ser_outintr();
#else
custom.intreq = INTF_TBE;
#endif
}
if (ireq & INTF_DSKBLK) {
#if NFD > 0
fdintr(0);
#endif
custom.intreq = INTF_DSKBLK;
}
if (ireq & INTF_SOFTINT) {
unsigned char ssir_active;
int s;
/*
* first clear the softint-bit
* then process all classes of softints.
* this order is dicated by the nature of
* software interrupts. The other order
* allows software interrupts to be missed.
* Also copy and clear ssir to prevent
* interrupt loss.
*/
clrsoftint();
s = splhigh();
ssir_active = ssir;
siroff(SIR_NET | SIR_CLOCK | SIR_CBACK);
splx(s);
if (ssir_active & SIR_NET) {
#ifdef REALLYDEBUG
printf("calling netintr\n");
#endif
uvmexp.softs++;
netintr();
}
if (ssir_active & SIR_CLOCK) {
#ifdef REALLYDEBUG
printf("calling softclock\n");
#endif
uvmexp.softs++;
/* XXXX softclock(&frame.f_stackadj); */
softclock();
}
if (ssir_active & SIR_CBACK) {
#ifdef REALLYDEBUG
printf("calling softcallbacks\n");
#endif
uvmexp.softs++;
call_sicallbacks();
}
}
break;
case 2:
p = &isr_ports;
while ((q = *p) != NULL) {
if ((q->isr_intr)(q->isr_arg))
break;
p = &q->isr_forw;
}
if (q == NULL)
ciaa_intr ();
#ifdef DRACO
if (is_draco())
single_inst_bclr_b(*draco_intpen, DRIRQ_INT2);
else
#endif
custom.intreq = INTF_PORTS;
break;
#ifdef DRACO
/* only handled here for DraCo */
case 6:
p = &isr_exter;
while ((q = *p) != NULL) {
if ((q->isr_intr)(q->isr_arg))
break;
p = &q->isr_forw;
}
single_inst_bclr_b(*draco_intpen, DRIRQ_INT6);
break;
#endif
case 3:
/* VBL */
if (ireq & INTF_BLIT)
blitter_handler();
if (ireq & INTF_COPER)
copper_handler();
if (ireq & INTF_VERTB)
vbl_handler();
break;
#ifdef DRACO
case 5:
p = &isr_supio;
while ((q = *p) != NULL) {
if ((q->isr_intr)(q->isr_arg))
break;
p = &q->isr_forw;
}
break;
#endif
#if 0
/* now dealt with in locore.s for speed reasons */
case 5:
/* check RS232 RBF */
serintr (0);
custom.intreq = INTF_DSKSYNC;
break;
#endif
case 4:
#ifdef DRACO
#include "drsc.h"
if (is_draco())
#if NDRSC > 0
drsc_handler();
#else
single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI);
#endif
else
#endif
audio_handler();
break;
default:
printf("intrhand: unexpected sr 0x%x, intreq = 0x%x\n",
sr, ireq);
break;
}
#ifdef REALLYDEBUG
printf("intrhand: leaving.\n");
#endif
}
#if 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));
void
candbtimer()
{
crashandburn = 0;
}
#endif
#if 0
/*
* Level 7 interrupts can be caused by the keyboard or parity errors.
*/
nmihand(frame)
struct frame frame;
{
if (kbdnmi()) {
#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;
}
if (panicbutton) {
if (crashandburn) {
crashandburn = 0;
panic(panicstr ?
"forced crash, nosync" : "forced crash");
}
crashandburn++;
timeout(candbtimer, (caddr_t)0, candbdelay);
}
#endif
return;
}
if (parityerror(&frame))
return;
/* panic?? */
printf("unexpected level 7 interrupt ignored\n");
}
#endif
/*
* should only get here, if no standard executable. This can currently
* only mean, we're reading an old ZMAGIC file without MID, but since Amiga
* ZMAGIC always worked the `right' way (;-)) just ignore the missing
* MID and proceed to new zmagic code ;-)
*/
int
cpu_exec_aout_makecmds(p, epp)
struct proc *p;
struct exec_package *epp;
{
int error = ENOEXEC;
#ifdef COMPAT_NOMID
struct exec *execp = epp->ep_hdr;
#endif
#ifdef COMPAT_NOMID
if (!((execp->a_midmag >> 16) & 0x0fff)
&& execp->a_midmag == ZMAGIC)
return(exec_aout_prep_zmagic(p, epp));
#endif
return(error);
}
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