/* $OpenBSD: machdep.c,v 1.10 2007/06/06 17:15:11 deraadt Exp $ */
/*
* Copyright (c) 1998, 1999, 2000, 2001 Steve Murphree, Jr.
* Copyright (c) 1996 Nivas Madhur
* All rights reserved.
*
* 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 Nivas Madhur.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
*/
/*
* Mach Operating System
* Copyright (c) 1993-1991 Carnegie Mellon University
* Copyright (c) 1991 OMRON Corporation
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/buf.h>
#include <sys/reboot.h>
#include <sys/conf.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/msgbuf.h>
#include <sys/syscallargs.h>
#ifdef SYSVMSG
#include <sys/msg.h>
#endif
#include <sys/exec.h>
#include <sys/sysctl.h>
#include <sys/errno.h>
#include <sys/extent.h>
#include <sys/core.h>
#include <sys/kcore.h>
#include <machine/asm.h>
#include <machine/asm_macro.h>
#include <machine/autoconf.h>
#include <machine/board.h>
#include <machine/cmmu.h>
#include <machine/cpu.h>
#include <machine/kcore.h>
#include <machine/prom.h>
#include <machine/reg.h>
#include <machine/trap.h>
#include <dev/cons.h>
#include <uvm/uvm_extern.h>
#include "ksyms.h"
#if DDB
#include <machine/db_machdep.h>
#include <ddb/db_extern.h>
#include <ddb/db_interface.h>
#include <ddb/db_var.h>
#endif /* DDB */
caddr_t allocsys(caddr_t);
void aviion_bootstrap(void);
int aviion_identify(void);
void consinit(void);
__dead void doboot(void);
void dumpconf(void);
void dumpsys(void);
u_int getipl(void);
void identifycpu(void);
void savectx(struct pcb *);
void secondary_main(void);
void secondary_pre_main(void);
intrhand_t intr_handlers[NVMEINTR];
int physmem; /* available physical memory, in pages */
struct vm_map *exec_map = NULL;
struct vm_map *phys_map = NULL;
#ifdef MULTIPROCESSOR
__cpu_simple_lock_t cpu_mutex = __SIMPLELOCK_UNLOCKED;
#endif
/*
* Declare these as initialized data so we can patch them.
*/
#ifndef BUFCACHEPERCENT
#define BUFCACHEPERCENT 5
#endif
#ifdef BUFPAGES
int bufpages = BUFPAGES;
#else
int bufpages = 0;
#endif
int bufcachepercent = BUFCACHEPERCENT;
/*
* Info for CTL_HW
*/
char machine[] = MACHINE; /* cpu "architecture" */
char cpu_model[120];
#if defined(DDB) || NKSYMS > 0
extern vaddr_t esym;
#endif
const char *prom_bootargs; /* set in locore.S */
char bootargs[256]; /* local copy */
u_int bootdev, bootunit, bootpart; /* set in locore.S */
int cputyp; /* set in locore.S */
int cpuspeed = 20; /* safe guess */
int avtyp;
const struct board *platform;
vaddr_t first_addr;
vaddr_t last_addr;
vaddr_t avail_start, avail_end;
vaddr_t virtual_avail, virtual_end;
extern struct user *proc0paddr;
/*
* This is to fake out the console routines, while booting.
* We could use directly the bugtty console, but we want to be able to
* configure a kernel without bugtty since we do not necessarily need a
* full-blown console driver.
*/
cons_decl(boot);
struct consdev bootcons = {
NULL,
NULL,
bootcngetc,
bootcnputc,
nullcnpollc,
NULL,
makedev(14, 0),
CN_NORMAL
};
/*
* Early console initialization: called early on from main, before vm init.
* We want to stick to the BUG routines for now, and we'll switch to the
* real console in cpu_startup().
*/
void
consinit()
{
cn_tab = NULL;
cninit();
#if defined(DDB)
db_machine_init();
ddb_init();
if (boothowto & RB_KDB)
Debugger();
#endif
}
void
identifycpu()
{
#if 0
/* XXX FILL ME */
cpuspeed = getcpuspeed(&brdid);
#endif
strlcpy(cpu_model, platform->descr, sizeof cpu_model);
}
/*
* Set up real-time clocks.
* These function pointers are set in dev/clock.c.
*/
void
cpu_initclocks()
{
platform->init_clocks();
}
void
setstatclockrate(int newhz)
{
/* function stub */
}
void
cpu_startup()
{
caddr_t v;
int sz, i;
vsize_t size;
int base, residual;
vaddr_t minaddr, maxaddr;
/*
* Initialize error message buffer (at end of core).
* avail_end was pre-decremented in aviion_bootstrap() to compensate.
*/
for (i = 0; i < btoc(MSGBUFSIZE); i++)
pmap_kenter_pa((paddr_t)msgbufp + i * PAGE_SIZE,
avail_end + i * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE);
pmap_update(pmap_kernel());
initmsgbuf((caddr_t)msgbufp, round_page(MSGBUFSIZE));
/*
* Good {morning,afternoon,evening,night}.
*/
printf(version);
identifycpu();
printf("real mem = %d\n", ctob(physmem));
/*
* Find out how much space we need, allocate it,
* and then give everything true virtual addresses.
*/
sz = (int)allocsys((caddr_t)0);
if ((v = (caddr_t)uvm_km_zalloc(kernel_map, round_page(sz))) == 0)
panic("startup: no room for tables");
if (allocsys(v) - v != sz)
panic("startup: table size inconsistency");
/*
* Grab machine dependent memory spaces
*/
platform->startup();
/*
* Determine how many buffers to allocate.
* We allocate bufcachepercent% of memory for buffer space.
*/
if (bufpages == 0)
bufpages = physmem * bufcachepercent / 100;
/* Restrict to at most 25% filled kvm */
if (bufpages >
(VM_MAX_KERNEL_ADDRESS-VM_MIN_KERNEL_ADDRESS) / PAGE_SIZE / 4)
bufpages = (VM_MAX_KERNEL_ADDRESS-VM_MIN_KERNEL_ADDRESS) /
PAGE_SIZE / 4;
/*
* Allocate a submap for exec arguments. This map effectively
* limits the number of processes exec'ing at any time.
*/
minaddr = vm_map_min(kernel_map);
exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
16 * NCARGS, VM_MAP_PAGEABLE, FALSE, NULL);
/*
* Allocate map for physio.
*/
phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
VM_PHYS_SIZE, 0, FALSE, NULL);
printf("avail mem = %ld (%d pages)\n", ptoa(uvmexp.free), uvmexp.free);
/*
* Set up buffers, so they can be used to read disk labels.
*/
bufinit();
/*
* Set up interrupt handlers.
*/
for (i = 0; i < NVMEINTR; i++)
SLIST_INIT(&intr_handlers[i]);
/*
* Configure the system.
*/
if (boothowto & RB_CONFIG) {
#ifdef BOOT_CONFIG
user_config();
#else
printf("kernel does not support -c; continuing..\n");
#endif
}
}
/*
* Allocate space for system data structures. We are given
* a starting virtual address and we return a final virtual
* address; along the way we set each data structure pointer.
*
* We call allocsys() with 0 to find out how much space we want,
* allocate that much and fill it with zeroes, and then call
* allocsys() again with the correct base virtual address.
*/
caddr_t
allocsys(v)
caddr_t v;
{
#define valloc(name, type, num) \
v = (caddr_t)(((name) = (type *)v) + (num))
#ifdef SYSVMSG
valloc(msgpool, char, msginfo.msgmax);
valloc(msgmaps, struct msgmap, msginfo.msgseg);
valloc(msghdrs, struct msg, msginfo.msgtql);
valloc(msqids, struct msqid_ds, msginfo.msgmni);
#endif
return v;
}
__dead void
doboot()
{
printf("Rebooting system...\n\n");
cmmu_shutdown();
scm_reboot(NULL);
/*NOTREACHED*/
for (;;); /* appease gcc */
}
__dead void
boot(howto)
int howto;
{
/* take a snapshot before clobbering any registers */
if (curproc && curproc->p_addr)
savectx(curpcb);
/* If system is cold, just halt. */
if (cold) {
/* (Unless the user explicitly asked for reboot.) */
if ((howto & RB_USERREQ) == 0)
howto |= RB_HALT;
goto haltsys;
}
boothowto = howto;
if ((howto & RB_NOSYNC) == 0) {
vfs_shutdown();
/*
* If we've been adjusting the clock, the todr
* will be out of synch; adjust it now unless
* the system was sitting in ddb.
*/
if ((howto & RB_TIMEBAD) == 0)
resettodr();
else
printf("WARNING: not updating battery clock\n");
}
/* Disable interrupts. */
splhigh();
/* If rebooting and a dump is requested, do it. */
if (howto & RB_DUMP)
dumpsys();
haltsys:
/* Run any shutdown hooks. */
doshutdownhooks();
if (howto & RB_HALT) {
printf("System halted.\n\n");
cmmu_shutdown();
scm_halt();
}
doboot();
for (;;);
/*NOTREACHED*/
}
unsigned dumpmag = 0x8fca0101; /* magic number for savecore */
int dumpsize = 0; /* also for savecore */
long dumplo = 0;
cpu_kcore_hdr_t cpu_kcore_hdr;
/*
* This is called by configure 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
dumpconf(void)
{
int nblks; /* size of dump area */
if (dumpdev == NODEV ||
(nblks = (bdevsw[major(dumpdev)].d_psize)(dumpdev)) == 0)
return;
if (nblks <= ctod(1))
return;
dumpsize = physmem;
/* aviion only uses a single segment. */
cpu_kcore_hdr.ram_segs[0].start = 0;
cpu_kcore_hdr.ram_segs[0].size = ctob(physmem);
cpu_kcore_hdr.cputype = cputyp;
/*
* Don't dump on the first block
* in case the dump device includes a disk label.
*/
if (dumplo < ctod(1))
dumplo = ctod(1);
/* Put dump at end of partition, and make it fit. */
if (dumpsize + 1 > dtoc(nblks - dumplo))
dumpsize = dtoc(nblks - dumplo) - 1;
if (dumplo < nblks - ctod(dumpsize) - 1)
dumplo = nblks - ctod(dumpsize) - 1;
}
/*
* Doadump comes here after turning off memory management and
* getting on the dump stack, either when called above, or by
* the auto-restart code.
*/
void
dumpsys()
{
int maj;
int psize;
daddr64_t blkno; /* current block to write */
/* dump routine */
int (*dump)(dev_t, daddr64_t, caddr_t, size_t);
int pg; /* page being dumped */
paddr_t maddr; /* PA being dumped */
int error; /* error code from (*dump)() */
kcore_seg_t *kseg_p;
cpu_kcore_hdr_t *chdr_p;
char dump_hdr[dbtob(1)]; /* XXX assume hdr fits in 1 block */
extern int msgbufmapped;
msgbufmapped = 0;
/* Make sure dump device is valid. */
if (dumpdev == NODEV)
return;
if (dumpsize == 0) {
dumpconf();
if (dumpsize == 0)
return;
}
maj = major(dumpdev);
if (dumplo < 0) {
printf("\ndump to dev %u,%u not possible\n", maj,
minor(dumpdev));
return;
}
dump = bdevsw[maj].d_dump;
blkno = dumplo;
printf("\ndumping to dev %u,%u offset %ld\n", maj,
minor(dumpdev), dumplo);
/* Setup the dump header */
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));
CORE_SETMAGIC(*kseg_p, KCORE_MAGIC, MID_MACHINE, CORE_CPU);
kseg_p->c_size = dbtob(1) - ALIGN(sizeof(*kseg_p));
*chdr_p = cpu_kcore_hdr;
printf("dump ");
psize = (*bdevsw[maj].d_psize)(dumpdev);
if (psize == -1) {
printf("area unavailable\n");
return;
}
/* Dump the header. */
error = (*dump)(dumpdev, blkno++, (caddr_t)dump_hdr, dbtob(1));
if (error != 0)
goto abort;
maddr = (paddr_t)0;
for (pg = 0; pg < dumpsize; pg++) {
#define NPGMB (1024 * 1024 / PAGE_SIZE)
/* print out how many MBs we have dumped */
if (pg != 0 && (pg % NPGMB) == 0)
printf("%d ", pg / NPGMB);
#undef NPGMB
pmap_enter(pmap_kernel(), (vaddr_t)vmmap, maddr,
VM_PROT_READ, VM_PROT_READ|PMAP_WIRED);
error = (*dump)(dumpdev, blkno, vmmap, PAGE_SIZE);
if (error == 0) {
maddr += PAGE_SIZE;
blkno += btodb(PAGE_SIZE);
} else
break;
}
abort:
switch (error) {
case 0:
printf("succeeded\n");
break;
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;
case EINTR:
printf("aborted from console\n");
break;
default:
printf("error %d\n", error);
break;
}
}
#ifdef MULTIPROCESSOR
/*
* Secondary CPU early initialization routine.
* Determine CPU number and set it, then allocate the idle pcb (and stack).
*
* Running on a minimal stack here, with interrupts disabled; do nothing fancy.
*/
void
secondary_pre_main()
{
struct cpu_info *ci;
set_cpu_number(cmmu_cpu_number()); /* Determine cpu number by CMMU */
ci = curcpu();
ci->ci_curproc = &proc0;
splhigh();
/*
* Setup CMMUs and translation tables (shared with the master cpu).
*/
pmap_bootstrap_cpu(ci->ci_cpuid);
/*
* Allocate UPAGES contiguous pages for the idle PCB and stack.
*/
ci->ci_idle_pcb = (struct pcb *)uvm_km_zalloc(kernel_map, USPACE);
if (ci->ci_idle_pcb == NULL) {
printf("cpu%d: unable to allocate idle stack\n", ci->ci_cpuid);
}
}
/*
* Further secondary CPU initialization.
*
* We are now running on our idle stack, with proper page tables.
* There is nothing to do but display some details about the CPU and its CMMUs.
*/
void
secondary_main()
{
struct cpu_info *ci = curcpu();
cpu_configuration_print(0);
ncpus++;
__cpu_simple_unlock(&cpu_mutex);
microuptime(&ci->ci_schedstate.spc_runtime);
ci->ci_curproc = NULL;
/*
* Upon return, the secondary cpu bootstrap code in locore will
* enter the idle loop, waiting for some food to process on this
* processor.
*/
}
#endif /* MULTIPROCESSOR */
/*
* Try to insert ihand in the list of handlers for vector vec.
*/
int
intr_establish(int vec, struct intrhand *ihand, const char *name)
{
struct intrhand *intr;
intrhand_t *list;
if (vec < 0 || vec >= NVMEINTR) {
#ifdef DIAGNOSTIC
printf("intr_establish: vec (0x%x) not between 0x00 and 0xff\n",
vec);
#endif /* DIAGNOSTIC */
return (EINVAL);
}
list = &intr_handlers[vec];
if (!SLIST_EMPTY(list)) {
intr = SLIST_FIRST(list);
if (intr->ih_ipl != ihand->ih_ipl) {
#ifdef DIAGNOSTIC
printf("intr_establish: there are other handlers with "
"vec (0x%x) at ipl %x, but you want it at %x\n",
vec, intr->ih_ipl, ihand->ih_ipl);
#endif /* DIAGNOSTIC */
return (EINVAL);
}
}
evcount_attach(&ihand->ih_count, name, (void *)&ihand->ih_ipl,
&evcount_intr);
SLIST_INSERT_HEAD(list, ihand, ih_link);
return (0);
}
void
nmihand(void *frame)
{
#ifdef DDB
printf("Abort switch pressed\n");
if (db_console) {
/*
* We can't use Debugger() here, as we are coming from an
* exception, and can't assume anything on the state we are
* in. Invoke the post-trap ddb entry directly.
*/
extern void m88k_db_trap(int, struct trapframe *);
m88k_db_trap(T_KDB_ENTRY, (struct trapframe *)frame);
}
#endif
}
int
cpu_exec_aout_makecmds(p, epp)
struct proc *p;
struct exec_package *epp;
{
return (ENOEXEC);
}
int
sys_sysarch(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
#if 0
struct sys_sysarch_args /* {
syscallarg(int) op;
syscallarg(char *) parm;
} */ *uap = v;
#endif
return (ENOSYS);
}
/*
* 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 are 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*/
}
/*
* Called from locore.S during boot,
* this is the first C code that's run.
*/
void
aviion_bootstrap()
{
extern int kernelstart;
extern char *end;
#ifndef MULTIPROCESSOR
cpuid_t master_cpu;
#endif
/* Save a copy of our commandline before it gets overwritten. */
strlcpy(bootargs, prom_bootargs, sizeof bootargs);
avtyp = aviion_identify();
/* Set up interrupt and fp exception handlers based on the machine. */
switch (avtyp) {
#ifdef AV400
case AV_400:
platform = &board_av400;
break;
#endif
#ifdef AV530
case AV_530:
platform = &board_av530;
break;
#endif
#ifdef AV5000
case AV_5000:
platform = &board_av5000;
break;
#endif
#ifdef AV6280
case AV_6280:
platform = &board_av6280;
break;
#endif
default:
scm_printf("Sorry, OpenBSD/" MACHINE
" does not support this model.\n");
scm_halt();
break;
};
cn_tab = &bootcons;
/* we can use printf() from here. */
platform->bootstrap();
/* Parse the commandline */
cmdline_parse();
uvmexp.pagesize = PAGE_SIZE;
uvm_setpagesize();
#if defined(DDB) || NKSYMS > 0
if (esym != 0)
first_addr = esym;
else
#endif
first_addr = (vaddr_t)&end;
first_addr = round_page(first_addr);
last_addr = platform->memsize();
physmem = btoc(last_addr);
setup_board_config();
master_cpu = cmmu_init();
set_cpu_number(master_cpu);
/*
* Now that set_cpu_number() set us with a valid cpu_info pointer,
* we need to initialize p_addr and curpcb before autoconf, for the
* fault handler to behave properly [except for badaddr() faults,
* which can be taken care of without a valid curcpu()].
*/
proc0.p_addr = proc0paddr;
curproc = &proc0;
curpcb = &proc0paddr->u_pcb;
avail_start = round_page(first_addr);
avail_end = last_addr;
/* Steal MSGBUFSIZE at the top of physical memory for msgbuf. */
avail_end -= round_page(MSGBUFSIZE);
pmap_bootstrap((vaddr_t)trunc_page((unsigned)&kernelstart));
/*
* Tell the VM system about available physical memory.
* The aviion systems only have one contiguous area.
*
* XXX However, on series 5000, SRAM overlaps a low memory range,
* XXX so we will need to upload two ranges of pages on them.
*/
uvm_page_physload(atop(avail_start), atop(avail_end),
atop(avail_start), atop(avail_end), VM_FREELIST_DEFAULT);
/* Initialize the "u-area" pages. */
bzero((caddr_t)curpcb, USPACE);
}
#ifdef MULTIPROCESSOR
void
cpu_boot_secondary_processors()
{
cpuid_t cpu;
int rc;
extern void secondary_start(void);
for (cpu = 0; cpu < max_cpus; cpu++) {
if (cpu != curcpu()->ci_cpuid) {
rc = scm_spincpu(cpu, (vaddr_t)secondary_start);
if (rc != 0)
printf("cpu%d: spin_cpu error %d\n", cpu, rc);
}
}
}
#endif
/*
* Boot console routines:
* Enables printing of boot messages before consinit().
*/
void
bootcnprobe(cp)
struct consdev *cp;
{
cp->cn_dev = makedev(0, 0);
cp->cn_pri = CN_NORMAL;
}
void
bootcninit(cp)
struct consdev *cp;
{
/* Nothing to do */
}
int
bootcngetc(dev)
dev_t dev;
{
return (scm_getc());
}
void
bootcnputc(dev, c)
dev_t dev;
int c;
{
if (c == '\n')
scm_putcrlf();
else
scm_putc(c);
}
u_int
getipl(void)
{
u_int curspl, psr;
disable_interrupt(psr);
curspl = platform->getipl();
set_psr(psr);
return curspl;
}
u_int
setipl(u_int level)
{
u_int curspl, psr;
disable_interrupt(psr);
curspl = platform->setipl(level);
/*
* The flush pipeline is required to make sure the above change gets
* through the data pipe and to the hardware; otherwise, the next
* bunch of instructions could execute at the wrong spl protection.
*/
flush_pipeline();
set_psr(psr);
return curspl;
}
u_int
raiseipl(u_int level)
{
u_int curspl, psr;
disable_interrupt(psr);
curspl = platform->raiseipl(level);
/*
* The flush pipeline is required to make sure the above change gets
* through the data pipe and to the hardware; otherwise, the next
* bunch of instructions could execute at the wrong spl protection.
*/
flush_pipeline();
set_psr(psr);
return curspl;
}
u_char hostaddr[6];
void
myetheraddr(u_char *cp)
{
bcopy(hostaddr, cp, 6);
}
/*
* Attempt to identify which AViiON flavour we are running on.
* The only thing we can do at this point is peek at random addresses and
* see if they cause bus errors, or not.
*
* These heuristics are probably not the best; feel free to come with better
* ones...
*/
int
aviion_identify()
{
/*
* We don't know anything about 88110-based models.
* Note that we can't use CPU_IS81x0 here since these are optimized
* if the kernel you're running is compiled for only one processor
* type, and we want to check against the real hardware.
*/
if (cputyp == CPU_88110)
return (0);
/*
* Series 100/200/300/400/3000/4000/4300 do not have the VIRQLV
* register at 0xfff85000.
*/
if (badaddr(0xfff85000, 4) != 0)
return (AV_400);
/*
* Series 5000 and 6000 do not have an RTC counter at 0xfff8f084.
*/
if (badaddr(0xfff8f084, 4) != 0)
return (AV_5000);
/*
* Series 4600/530 have IOFUSEs at 0xfffb0040 and 0xfffb00c0.
*/
if (badaddr(0xfffb0040, 1) == 0 && badaddr(0xfffb00c0, 1) == 0)
return (AV_530);
/*
* Series 6280/8000-8 fall here.
*/
return (AV_6280);
}
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