4.4BSD/usr/src/sys/hp300/hp300/machdep.c
/*
* 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 8.1 (Berkeley) 6/10/93
*/
#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/ioctl.h>
#include <sys/tty.h>
#include <sys/mount.h>
#include <sys/user.h>
#include <sys/exec.h>
#include <sys/sysctl.h>
#ifdef SYSVSHM
#include <sys/shm.h>
#endif
#ifdef HPUXCOMPAT
#include <hp/hpux/hpux.h>
#endif
#include <machine/cpu.h>
#include <machine/reg.h>
#include <machine/psl.h>
#include <hp/dev/cons.h>
#include <hp300/hp300/isr.h>
#include <hp300/hp300/pte.h>
#include <net/netisr.h>
#define MAXMEM 64*1024*CLSIZE /* XXX - from cmap.h */
#include <vm/vm_kern.h>
/* the following is used externally (sysctl_hw) */
char machine[] = "hp300"; /* cpu "architecture" */
vm_map_t buffer_map;
extern vm_offset_t avail_end;
/*
* Declare these as initialized data so we can patch them.
*/
int nswbuf = 0;
#ifdef NBUF
int nbuf = NBUF;
#else
int nbuf = 0;
#endif
#ifdef BUFPAGES
int bufpages = BUFPAGES;
#else
int bufpages = 0;
#endif
int msgbufmapped; /* set when safe to use msgbuf */
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;
extern short exframesize[];
/*
* Console initialization: called early on from main,
* before vm init or startup. Do enough configuration
* to choose and initialize a console.
*/
consinit()
{
/*
* Set cpuspeed immediately since cninit() called routines
* might use delay. Note that we only set it if a custom value
* has not already been specified.
*/
if (cpuspeed == 0) {
switch (machineid) {
case HP_320:
case HP_330:
case HP_340:
cpuspeed = MHZ_16;
break;
case HP_350:
case HP_360:
case HP_380:
cpuspeed = MHZ_25;
break;
case HP_370:
case HP_433:
cpuspeed = MHZ_33;
break;
case HP_375:
cpuspeed = MHZ_50;
break;
default: /* assume the fastest */
cpuspeed = MHZ_50;
break;
}
if (mmutype == MMU_68040)
cpuspeed *= 2; /* XXX */
}
/*
* Find what hardware is attached to this machine.
*/
find_devs();
/*
* Initialize the console before we print anything out.
*/
cninit();
}
/*
* cpu_startup: allocate memory for variable-sized tables,
* initialize cpu, and do autoconfiguration.
*/
cpu_startup()
{
register unsigned i;
register caddr_t v, firstaddr;
int base, residual;
vm_offset_t minaddr, maxaddr;
vm_size_t size;
#ifdef DEBUG
extern int pmapdebug;
int opmapdebug = pmapdebug;
pmapdebug = 0;
#endif
/*
* Initialize error message buffer (at end of core).
* avail_end was pre-decremented in pmap_bootstrap to compensate.
*/
for (i = 0; i < btoc(sizeof (struct msgbuf)); i++)
pmap_enter(kernel_pmap, (vm_offset_t)msgbufp,
avail_end + i * NBPG, VM_PROT_ALL, TRUE);
msgbufmapped = 1;
/*
* Good {morning,afternoon,evening,night}.
*/
printf(version);
identifycpu();
printf("real mem = %d\n", ctob(physmem));
/*
* Allocate space for system data structures.
* The first available real memory address is in "firstaddr".
* The first available kernel virtual address is in "v".
* As pages of kernel virtual memory are allocated, "v" is incremented.
* As pages of memory are allocated and cleared,
* "firstaddr" is incremented.
* An index into the kernel page table corresponding to the
* virtual memory address maintained in "v" is kept in "mapaddr".
*/
/*
* Make two passes. The first pass calculates how much memory is
* needed and allocates it. The second pass assigns virtual
* addresses to the various data structures.
*/
firstaddr = 0;
again:
v = (caddr_t)firstaddr;
#define valloc(name, type, num) \
(name) = (type *)v; v = (caddr_t)((name)+(num))
#define valloclim(name, type, num, lim) \
(name) = (type *)v; v = (caddr_t)((lim) = ((name)+(num)))
valloc(cfree, struct cblock, nclist);
valloc(callout, struct callout, ncallout);
valloc(swapmap, struct map, nswapmap = maxproc * 2);
#ifdef SYSVSHM
valloc(shmsegs, struct shmid_ds, shminfo.shmmni);
#endif
/*
* Determine how many buffers to allocate.
* Since HPs tend to be long on memory and short on disk speed,
* we allocate more buffer space than the BSD standard of
* use 10% of memory for the first 2 Meg, 5% of remaining.
* We just allocate a flat 10%. Insure a minimum of 16 buffers.
* We allocate 1/2 as many swap buffer headers as file i/o buffers.
*/
if (bufpages == 0)
bufpages = physmem / 10 / CLSIZE;
if (nbuf == 0) {
nbuf = bufpages;
if (nbuf < 16)
nbuf = 16;
}
if (nswbuf == 0) {
nswbuf = (nbuf / 2) &~ 1; /* force even */
if (nswbuf > 256)
nswbuf = 256; /* sanity */
}
valloc(swbuf, struct buf, nswbuf);
valloc(buf, struct buf, nbuf);
/*
* End of first pass, size has been calculated so allocate memory
*/
if (firstaddr == 0) {
size = (vm_size_t)(v - firstaddr);
firstaddr = (caddr_t) kmem_alloc(kernel_map, round_page(size));
if (firstaddr == 0)
panic("startup: no room for tables");
goto again;
}
/*
* End of second pass, addresses have been assigned
*/
if ((vm_size_t)(v - firstaddr) != 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;
buffer_map = kmem_suballoc(kernel_map, (vm_offset_t *)&buffers,
&maxaddr, size, FALSE);
minaddr = (vm_offset_t)buffers;
if (vm_map_find(buffer_map, vm_object_allocate(size), (vm_offset_t)0,
&minaddr, size, FALSE) != KERN_SUCCESS)
panic("startup: cannot allocate buffers");
base = bufpages / nbuf;
residual = bufpages % nbuf;
for (i = 0; i < nbuf; i++) {
vm_size_t curbufsize;
vm_offset_t curbuf;
/*
* First <residual> buffers get (base+1) physical pages
* allocated for them. The rest get (base) physical pages.
*
* The rest of each buffer occupies virtual space,
* but has no physical memory allocated for it.
*/
curbuf = (vm_offset_t)buffers + i * MAXBSIZE;
curbufsize = CLBYTES * (i < residual ? base+1 : base);
vm_map_pageable(buffer_map, curbuf, curbuf+curbufsize, FALSE);
vm_map_simplify(buffer_map, curbuf);
}
/*
* Allocate a submap for exec arguments. This map effectively
* limits the number of processes exec'ing at any time.
*/
exec_map = kmem_suballoc(kernel_map, &minaddr, &maxaddr,
16*NCARGS, TRUE);
/*
* Allocate a submap for physio
*/
phys_map = kmem_suballoc(kernel_map, &minaddr, &maxaddr,
VM_PHYS_SIZE, TRUE);
/*
* Finally, allocate mbuf pool. Since mclrefcnt is an off-size
* we use the more space efficient malloc in place of kmem_alloc.
*/
mclrefcnt = (char *)malloc(NMBCLUSTERS+CLBYTES/MCLBYTES,
M_MBUF, M_NOWAIT);
bzero(mclrefcnt, NMBCLUSTERS+CLBYTES/MCLBYTES);
mb_map = kmem_suballoc(kernel_map, (vm_offset_t *)&mbutl, &maxaddr,
VM_MBUF_SIZE, FALSE);
/*
* Initialize callouts
*/
callfree = callout;
for (i = 1; i < ncallout; i++)
callout[i-1].c_next = &callout[i];
callout[i-1].c_next = NULL;
#ifdef DEBUG
pmapdebug = opmapdebug;
#endif
printf("avail mem = %d\n", ptoa(cnt.v_free_count));
printf("using %d buffers containing %d bytes of memory\n",
nbuf, bufpages * CLBYTES);
/*
* Set up CPU-specific registers, cache, etc.
*/
initcpu();
/*
* Set up buffers, so they can be used to read disk labels.
*/
bufinit();
/*
* Configure the system.
*/
configure();
}
/*
* Set registers on exec.
* XXX Should clear registers except sp, pc,
* but would break init; should be fixed soon.
*/
setregs(p, entry, retval)
register struct proc *p;
u_long entry;
int retval[2];
{
struct frame *frame = (struct frame *)p->p_md.md_regs;
frame->f_pc = entry & ~1;
#ifdef FPCOPROC
/* restore a null state frame */
p->p_addr->u_pcb.pcb_fpregs.fpf_null = 0;
m68881_restore(&p->p_addr->u_pcb.pcb_fpregs);
#endif
#ifdef HPUXCOMPAT
if (p->p_md.md_flags & MDP_HPUX) {
frame->f_regs[A0] = 0; /* not 68010 (bit 31), no FPA (30) */
retval[0] = 0; /* no float card */
#ifdef FPCOPROC
retval[1] = 1; /* yes 68881 */
#else
retval[1] = 0; /* no 68881 */
#endif
}
/*
* XXX This doesn't have much to do with setting registers but
* I didn't want to muck up kern_exec.c with this code, so I
* stuck it here.
*
* Ensure we perform the right action on traps type 1 and 2:
* If our parent is an HPUX process and we are being traced, turn
* on HPUX style interpretation. Else if we were using the HPUX
* style interpretation, revert to the BSD interpretation.
*
* Note that we do this by changing the trap instruction in the
* global "sigcode" array which then gets copied out to the user's
* sigcode in the stack. Since we are changing it in the global
* array we must always reset it, even for non-HPUX processes.
*
* Note also that implementing it in this way creates a potential
* race where we could have tweaked it for process A which then
* blocks in the copyout to the stack and process B comes along
* and untweaks it causing A to wind up with the wrong setting
* when the copyout continues. However, since we have already
* copied something out to this user stack page (thereby faulting
* it in), this scenerio is extremely unlikely.
*/
{
extern short sigcodetrap[];
if ((p->p_pptr->p_md.md_flags & MDP_HPUX) &&
(p->p_flag & STRC)) {
p->p_md.md_flags |= MDP_HPUXTRACE;
*sigcodetrap = 0x4E42;
} else {
p->p_md.md_flags &= ~MDP_HPUXTRACE;
*sigcodetrap = 0x4E41;
}
}
#endif
}
/*
* Info for CTL_HW
*/
extern char machine[];
char cpu_model[120];
extern char ostype[], osrelease[], version[];
identifycpu()
{
char *t, *mc;
int len;
switch (machineid) {
case HP_320:
t = "320 (16.67MHz";
break;
case HP_330:
t = "318/319/330 (16.67MHz";
break;
case HP_340:
t = "340 (16.67MHz";
break;
case HP_350:
t = "350 (25MHz";
break;
case HP_360:
t = "360 (25MHz";
break;
case HP_370:
t = "370 (33.33MHz";
break;
case HP_375:
t = "345/375 (50MHz";
break;
case HP_380:
t = "380/425 (25MHz";
break;
case HP_433:
t = "433 (33MHz";
break;
default:
printf("\nunknown machine type %d\n", machineid);
panic("startup");
}
mc = (mmutype == MMU_68040 ? "40" :
(mmutype == MMU_68030 ? "30" : "20"));
sprintf(cpu_model, "HP9000/%s MC680%s CPU", t, mc);
switch (mmutype) {
case MMU_68040:
case MMU_68030:
strcat(cpu_model, "+MMU");
break;
case MMU_68851:
strcat(cpu_model, ", MC68851 MMU");
break;
case MMU_HP:
strcat(cpu_model, ", HP MMU");
break;
default:
printf("%s\nunknown MMU type %d\n", cpu_model, mmutype);
panic("startup");
}
len = strlen(cpu_model);
if (mmutype == MMU_68040)
len += sprintf(cpu_model + len,
"+FPU, 4k on-chip physical I/D caches");
else if (mmutype == MMU_68030)
len += sprintf(cpu_model + len, ", %sMHz MC68882 FPU",
machineid == HP_340 ? "16.67" :
(machineid == HP_360 ? "25" :
(machineid == HP_370 ? "33.33" : "50")));
else
len += sprintf(cpu_model + len, ", %sMHz MC68881 FPU",
machineid == HP_350 ? "20" : "16.67");
switch (ectype) {
case EC_VIRT:
sprintf(cpu_model + len, ", %dK virtual-address cache",
machineid == HP_320 ? 16 : 32);
break;
case EC_PHYS:
sprintf(cpu_model + len, ", %dK physical-address cache",
machineid == HP_370 ? 64 : 32);
break;
}
strcat(cpu_model, ")");
printf("%s\n", cpu_model);
/*
* Now that we have told the user what they have,
* let them know if that machine type isn't configured.
*/
switch (machineid) {
case -1: /* keep compilers happy */
#if !defined(HP320) && !defined(HP350)
case HP_320:
case HP_350:
#endif
#ifndef HP330
case HP_330:
#endif
#if !defined(HP360) && !defined(HP370)
case HP_340:
case HP_360:
case HP_370:
#endif
#if !defined(HP380)
case HP_380:
case HP_433:
#endif
panic("CPU type not configured");
default:
break;
}
}
/*
* machine dependent system variables.
*/
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;
{
/* all sysctl names at this level are terminal */
if (namelen != 1)
return (ENOTDIR); /* overloaded */
switch (name[0]) {
case CPU_CONSDEV:
return (sysctl_rdstruct(oldp, oldlenp, newp, &cn_tty->t_dev,
sizeof cn_tty->t_dev));
default:
return (EOPNOTSUPP);
}
/* NOTREACHED */
}
#ifdef USELEDS
#include <hp300/hp300/led.h>
int inledcontrol = 0; /* 1 if we are in ledcontrol already, cheap mutex */
char *ledaddr;
/*
* Map the LED page and setup the KVA to access it.
*/
ledinit()
{
extern caddr_t ledbase;
pmap_enter(kernel_pmap, (vm_offset_t)ledbase, (vm_offset_t)LED_ADDR,
VM_PROT_READ|VM_PROT_WRITE, TRUE);
ledaddr = (char *) ((int)ledbase | (LED_ADDR & PGOFSET));
}
/*
* Do lights:
* `ons' is a mask of LEDs to turn on,
* `offs' is a mask of LEDs to turn off,
* `togs' is a mask of LEDs to toggle.
* Note we don't use splclock/splx for mutual exclusion.
* They are expensive and we really don't need to be that precise.
* Besides we would like to be able to profile this routine.
*/
ledcontrol(ons, offs, togs)
register int ons, offs, togs;
{
static char currentleds;
register char leds;
inledcontrol = 1;
leds = currentleds;
if (ons)
leds |= ons;
if (offs)
leds &= ~offs;
if (togs)
leds ^= togs;
currentleds = leds;
*ledaddr = ~leds;
inledcontrol = 0;
}
#endif
#define SS_RTEFRAME 1
#define SS_FPSTATE 2
#define SS_USERREGS 4
struct sigstate {
int ss_flags; /* which of the following are valid */
struct frame ss_frame; /* original exception frame */
struct fpframe ss_fpstate; /* 68881/68882 state info */
};
/*
* WARNING: code in locore.s assumes the layout shown for sf_signum
* thru sf_handler so... don't screw with them!
*/
struct sigframe {
int sf_signum; /* signo for handler */
int sf_code; /* additional info for handler */
struct sigcontext *sf_scp; /* context ptr for handler */
sig_t sf_handler; /* handler addr for u_sigc */
struct sigstate sf_state; /* state of the hardware */
struct sigcontext sf_sc; /* actual context */
};
#ifdef HPUXCOMPAT
struct hpuxsigcontext {
int hsc_syscall;
char hsc_action;
char hsc_pad1;
char hsc_pad2;
char hsc_onstack;
int hsc_mask;
int hsc_sp;
short hsc_ps;
int hsc_pc;
/* the rest aren't part of the context but are included for our convenience */
short hsc_pad;
u_int hsc_magic; /* XXX sigreturn: cookie */
struct sigcontext *hsc_realsc; /* XXX sigreturn: ptr to BSD context */
};
/*
* For an HP-UX process, a partial hpuxsigframe follows the normal sigframe.
* Tremendous waste of space, but some HP-UX applications (e.g. LCL) need it.
*/
struct hpuxsigframe {
int hsf_signum;
int hsf_code;
struct sigcontext *hsf_scp;
struct hpuxsigcontext hsf_sc;
int hsf_regs[15];
};
#endif
#ifdef DEBUG
int sigdebug = 0;
int sigpid = 0;
#define SDB_FOLLOW 0x01
#define SDB_KSTACK 0x02
#define SDB_FPSTATE 0x04
#endif
/*
* Send an interrupt to process.
*/
void
sendsig(catcher, sig, mask, code)
sig_t catcher;
int sig, mask;
unsigned code;
{
register struct proc *p = curproc;
register struct sigframe *fp, *kfp;
register struct frame *frame;
register struct sigacts *psp = p->p_sigacts;
register short ft;
int oonstack, fsize;
extern char sigcode[], esigcode[];
frame = (struct frame *)p->p_md.md_regs;
ft = frame->f_format;
oonstack = psp->ps_sigstk.ss_flags & SA_ONSTACK;
/*
* Allocate and validate space for the signal handler
* context. Note that if the stack is in P0 space, the
* call to grow() is a nop, and the useracc() check
* will fail if the process has not already allocated
* the space with a `brk'.
*/
#ifdef HPUXCOMPAT
if (p->p_md.md_flags & MDP_HPUX)
fsize = sizeof(struct sigframe) + sizeof(struct hpuxsigframe);
else
#endif
fsize = sizeof(struct sigframe);
if ((psp->ps_flags & SAS_ALTSTACK) &&
(psp->ps_sigstk.ss_flags & SA_ONSTACK) == 0 &&
(psp->ps_sigonstack & sigmask(sig))) {
fp = (struct sigframe *)(psp->ps_sigstk.ss_base +
psp->ps_sigstk.ss_size - fsize);
psp->ps_sigstk.ss_flags |= SA_ONSTACK;
} else
fp = (struct sigframe *)(frame->f_regs[SP] - fsize);
if ((unsigned)fp <= USRSTACK - ctob(p->p_vmspace->vm_ssize))
(void)grow(p, (unsigned)fp);
#ifdef DEBUG
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
printf("sendsig(%d): sig %d ssp %x usp %x scp %x ft %d\n",
p->p_pid, sig, &oonstack, fp, &fp->sf_sc, ft);
#endif
if (useracc((caddr_t)fp, fsize, B_WRITE) == 0) {
#ifdef DEBUG
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
printf("sendsig(%d): useracc failed on sig %d\n",
p->p_pid, sig);
#endif
/*
* Process has trashed its stack; give it an illegal
* instruction to halt it in its tracks.
*/
SIGACTION(p, SIGILL) = SIG_DFL;
sig = sigmask(SIGILL);
p->p_sigignore &= ~sig;
p->p_sigcatch &= ~sig;
p->p_sigmask &= ~sig;
psignal(p, SIGILL);
return;
}
kfp = (struct sigframe *)malloc((u_long)fsize, M_TEMP, M_WAITOK);
/*
* Build the argument list for the signal handler.
*/
kfp->sf_signum = sig;
kfp->sf_code = code;
kfp->sf_scp = &fp->sf_sc;
kfp->sf_handler = catcher;
/*
* Save necessary hardware state. Currently this includes:
* - general registers
* - original exception frame (if not a "normal" frame)
* - FP coprocessor state
*/
kfp->sf_state.ss_flags = SS_USERREGS;
bcopy((caddr_t)frame->f_regs,
(caddr_t)kfp->sf_state.ss_frame.f_regs, sizeof frame->f_regs);
if (ft >= FMT7) {
#ifdef DEBUG
if (ft > 15 || exframesize[ft] < 0)
panic("sendsig: bogus frame type");
#endif
kfp->sf_state.ss_flags |= SS_RTEFRAME;
kfp->sf_state.ss_frame.f_format = frame->f_format;
kfp->sf_state.ss_frame.f_vector = frame->f_vector;
bcopy((caddr_t)&frame->F_u,
(caddr_t)&kfp->sf_state.ss_frame.F_u, exframesize[ft]);
/*
* Leave an indicator that we need to clean up the kernel
* stack. We do this by setting the "pad word" above the
* hardware stack frame to the amount the stack must be
* adjusted by.
*
* N.B. we increment rather than just set f_stackadj in
* case we are called from syscall when processing a
* sigreturn. In that case, f_stackadj may be non-zero.
*/
frame->f_stackadj += exframesize[ft];
frame->f_format = frame->f_vector = 0;
#ifdef DEBUG
if (sigdebug & SDB_FOLLOW)
printf("sendsig(%d): copy out %d of frame %d\n",
p->p_pid, exframesize[ft], ft);
#endif
}
#ifdef FPCOPROC
kfp->sf_state.ss_flags |= SS_FPSTATE;
m68881_save(&kfp->sf_state.ss_fpstate);
#ifdef DEBUG
if ((sigdebug & SDB_FPSTATE) && *(char *)&kfp->sf_state.ss_fpstate)
printf("sendsig(%d): copy out FP state (%x) to %x\n",
p->p_pid, *(u_int *)&kfp->sf_state.ss_fpstate,
&kfp->sf_state.ss_fpstate);
#endif
#endif
/*
* Build the signal context to be used by sigreturn.
*/
kfp->sf_sc.sc_onstack = oonstack;
kfp->sf_sc.sc_mask = mask;
kfp->sf_sc.sc_sp = frame->f_regs[SP];
kfp->sf_sc.sc_fp = frame->f_regs[A6];
kfp->sf_sc.sc_ap = (int)&fp->sf_state;
kfp->sf_sc.sc_pc = frame->f_pc;
kfp->sf_sc.sc_ps = frame->f_sr;
#ifdef HPUXCOMPAT
/*
* Create an HP-UX style sigcontext structure and associated goo
*/
if (p->p_md.md_flags & MDP_HPUX) {
register struct hpuxsigframe *hkfp;
hkfp = (struct hpuxsigframe *)&kfp[1];
hkfp->hsf_signum = bsdtohpuxsig(kfp->sf_signum);
hkfp->hsf_code = kfp->sf_code;
hkfp->hsf_scp = (struct sigcontext *)
&((struct hpuxsigframe *)(&fp[1]))->hsf_sc;
hkfp->hsf_sc.hsc_syscall = 0; /* XXX */
hkfp->hsf_sc.hsc_action = 0; /* XXX */
hkfp->hsf_sc.hsc_pad1 = hkfp->hsf_sc.hsc_pad2 = 0;
hkfp->hsf_sc.hsc_onstack = kfp->sf_sc.sc_onstack;
hkfp->hsf_sc.hsc_mask = kfp->sf_sc.sc_mask;
hkfp->hsf_sc.hsc_sp = kfp->sf_sc.sc_sp;
hkfp->hsf_sc.hsc_ps = kfp->sf_sc.sc_ps;
hkfp->hsf_sc.hsc_pc = kfp->sf_sc.sc_pc;
hkfp->hsf_sc.hsc_pad = 0;
hkfp->hsf_sc.hsc_magic = 0xdeadbeef;
hkfp->hsf_sc.hsc_realsc = kfp->sf_scp;
bcopy((caddr_t)frame->f_regs, (caddr_t)hkfp->hsf_regs,
sizeof (hkfp->hsf_regs));
kfp->sf_signum = hkfp->hsf_signum;
kfp->sf_scp = hkfp->hsf_scp;
}
#endif
(void) copyout((caddr_t)kfp, (caddr_t)fp, fsize);
frame->f_regs[SP] = (int)fp;
#ifdef DEBUG
if (sigdebug & SDB_FOLLOW)
printf("sendsig(%d): sig %d scp %x fp %x sc_sp %x sc_ap %x\n",
p->p_pid, sig, kfp->sf_scp, fp,
kfp->sf_sc.sc_sp, kfp->sf_sc.sc_ap);
#endif
/*
* Signal trampoline code is at base of user stack.
*/
frame->f_pc = (int)PS_STRINGS - (esigcode - sigcode);
#ifdef DEBUG
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
printf("sendsig(%d): sig %d returns\n",
p->p_pid, sig);
#endif
free((caddr_t)kfp, M_TEMP);
}
/*
* System call to cleanup state after a signal
* has been taken. Reset signal mask and
* stack state from context left by sendsig (above).
* Return to previous pc and psl as specified by
* context left by sendsig. Check carefully to
* make sure that the user has not modified the
* psl to gain improper priviledges or to cause
* a machine fault.
*/
struct sigreturn_args {
struct sigcontext *sigcntxp;
};
/* ARGSUSED */
sigreturn(p, uap, retval)
struct proc *p;
struct sigreturn_args *uap;
int *retval;
{
register struct sigcontext *scp;
register struct frame *frame;
register int rf;
struct sigcontext tsigc;
struct sigstate tstate;
int flags;
scp = uap->sigcntxp;
#ifdef DEBUG
if (sigdebug & SDB_FOLLOW)
printf("sigreturn: pid %d, scp %x\n", p->p_pid, scp);
#endif
if ((int)scp & 1)
return (EINVAL);
#ifdef HPUXCOMPAT
/*
* Grab context as an HP-UX style context and determine if it
* was one that we contructed in sendsig.
*/
if (p->p_md.md_flags & MDP_HPUX) {
struct hpuxsigcontext *hscp = (struct hpuxsigcontext *)scp;
struct hpuxsigcontext htsigc;
if (useracc((caddr_t)hscp, sizeof (*hscp), B_WRITE) == 0 ||
copyin((caddr_t)hscp, (caddr_t)&htsigc, sizeof htsigc))
return (EINVAL);
/*
* If not generated by sendsig or we cannot restore the
* BSD-style sigcontext, just restore what we can -- state
* will be lost, but them's the breaks.
*/
hscp = &htsigc;
if (hscp->hsc_magic != 0xdeadbeef ||
(scp = hscp->hsc_realsc) == 0 ||
useracc((caddr_t)scp, sizeof (*scp), B_WRITE) == 0 ||
copyin((caddr_t)scp, (caddr_t)&tsigc, sizeof tsigc)) {
if (hscp->hsc_onstack & 01)
p->p_sigacts->ps_sigstk.ss_flags |= SA_ONSTACK;
else
p->p_sigacts->ps_sigstk.ss_flags &= ~SA_ONSTACK;
p->p_sigmask = hscp->hsc_mask &~ sigcantmask;
frame = (struct frame *) p->p_md.md_regs;
frame->f_regs[SP] = hscp->hsc_sp;
frame->f_pc = hscp->hsc_pc;
frame->f_sr = hscp->hsc_ps &~ PSL_USERCLR;
return (EJUSTRETURN);
}
/*
* Otherwise, overlay BSD context with possibly modified
* HP-UX values.
*/
tsigc.sc_onstack = hscp->hsc_onstack;
tsigc.sc_mask = hscp->hsc_mask;
tsigc.sc_sp = hscp->hsc_sp;
tsigc.sc_ps = hscp->hsc_ps;
tsigc.sc_pc = hscp->hsc_pc;
} else
#endif
/*
* Test and fetch the context structure.
* We grab it all at once for speed.
*/
if (useracc((caddr_t)scp, sizeof (*scp), B_WRITE) == 0 ||
copyin((caddr_t)scp, (caddr_t)&tsigc, sizeof tsigc))
return (EINVAL);
scp = &tsigc;
if ((scp->sc_ps & (PSL_MBZ|PSL_IPL|PSL_S)) != 0)
return (EINVAL);
/*
* Restore the user supplied information
*/
if (scp->sc_onstack & 01)
p->p_sigacts->ps_sigstk.ss_flags |= SA_ONSTACK;
else
p->p_sigacts->ps_sigstk.ss_flags &= ~SA_ONSTACK;
p->p_sigmask = scp->sc_mask &~ sigcantmask;
frame = (struct frame *) p->p_md.md_regs;
frame->f_regs[SP] = scp->sc_sp;
frame->f_regs[A6] = scp->sc_fp;
frame->f_pc = scp->sc_pc;
frame->f_sr = scp->sc_ps;
/*
* Grab pointer to hardware state information.
* If zero, the user is probably doing a longjmp.
*/
if ((rf = scp->sc_ap) == 0)
return (EJUSTRETURN);
/*
* See if there is anything to do before we go to the
* expense of copying in close to 1/2K of data
*/
flags = fuword((caddr_t)rf);
#ifdef DEBUG
if (sigdebug & SDB_FOLLOW)
printf("sigreturn(%d): sc_ap %x flags %x\n",
p->p_pid, rf, flags);
#endif
/*
* fuword failed (bogus sc_ap value).
*/
if (flags == -1)
return (EINVAL);
if (flags == 0 || copyin((caddr_t)rf, (caddr_t)&tstate, sizeof tstate))
return (EJUSTRETURN);
#ifdef DEBUG
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
printf("sigreturn(%d): ssp %x usp %x scp %x ft %d\n",
p->p_pid, &flags, scp->sc_sp, uap->sigcntxp,
(flags&SS_RTEFRAME) ? tstate.ss_frame.f_format : -1);
#endif
/*
* Restore most of the users registers except for A6 and SP
* which were handled above.
*/
if (flags & SS_USERREGS)
bcopy((caddr_t)tstate.ss_frame.f_regs,
(caddr_t)frame->f_regs, sizeof(frame->f_regs)-2*NBPW);
/*
* Restore long stack frames. Note that we do not copy
* back the saved SR or PC, they were picked up above from
* the sigcontext structure.
*/
if (flags & SS_RTEFRAME) {
register int sz;
/* grab frame type and validate */
sz = tstate.ss_frame.f_format;
if (sz > 15 || (sz = exframesize[sz]) < 0)
return (EINVAL);
frame->f_stackadj -= sz;
frame->f_format = tstate.ss_frame.f_format;
frame->f_vector = tstate.ss_frame.f_vector;
bcopy((caddr_t)&tstate.ss_frame.F_u, (caddr_t)&frame->F_u, sz);
#ifdef DEBUG
if (sigdebug & SDB_FOLLOW)
printf("sigreturn(%d): copy in %d of frame type %d\n",
p->p_pid, sz, tstate.ss_frame.f_format);
#endif
}
#ifdef FPCOPROC
/*
* Finally we restore the original FP context
*/
if (flags & SS_FPSTATE)
m68881_restore(&tstate.ss_fpstate);
#ifdef DEBUG
if ((sigdebug & SDB_FPSTATE) && *(char *)&tstate.ss_fpstate)
printf("sigreturn(%d): copied in FP state (%x) at %x\n",
p->p_pid, *(u_int *)&tstate.ss_fpstate,
&tstate.ss_fpstate);
#endif
#endif
#ifdef DEBUG
if ((sigdebug & SDB_FOLLOW) ||
((sigdebug & SDB_KSTACK) && p->p_pid == sigpid))
printf("sigreturn(%d): returns\n", p->p_pid);
#endif
return (EJUSTRETURN);
}
int waittime = -1;
boot(howto)
register int howto;
{
/* take a snap shot before clobbering any registers */
if (curproc)
savectx(curproc->p_addr, 0);
boothowto = howto;
if ((howto&RB_NOSYNC) == 0 && waittime < 0) {
register struct buf *bp;
int iter, nbusy;
waittime = 0;
(void) spl0();
printf("syncing disks... ");
/*
* Release vnodes held by texts before sync.
*/
if (panicstr == 0)
vnode_pager_umount(NULL);
#ifdef notdef
#include "fd.h"
#if NFD > 0
fdshutdown();
#endif
#endif
sync(&proc0, (void *)NULL, (int *)NULL);
for (iter = 0; iter < 20; iter++) {
nbusy = 0;
for (bp = &buf[nbuf]; --bp >= buf; )
if ((bp->b_flags & (B_BUSY|B_INVAL)) == B_BUSY)
nbusy++;
if (nbusy == 0)
break;
printf("%d ", nbusy);
DELAY(40000 * iter);
}
if (nbusy)
printf("giving up\n");
else
printf("done\n");
/*
* If we've been adjusting the clock, the todr
* will be out of synch; adjust it now.
*/
resettodr();
}
splhigh(); /* extreme priority */
if (howto&RB_HALT) {
printf("halted\n\n");
asm(" stop #0x2700");
} else {
if (howto & RB_DUMP)
dumpsys();
doboot();
/*NOTREACHED*/
}
/*NOTREACHED*/
}
int dumpmag = 0x8fca0101; /* magic number for savecore */
int dumpsize = 0; /* also for savecore */
long dumplo = 0;
dumpconf()
{
int nblks;
dumpsize = physmem;
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(physmem));
}
/*
* 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.
*/
dumpsys()
{
msgbufmapped = 0;
if (dumpdev == NODEV)
return;
/*
* For dumps during autoconfiguration,
* if dump device has already configured...
*/
if (dumpsize == 0)
dumpconf();
if (dumplo < 0)
return;
printf("\ndumping to dev %x, offset %d\n", dumpdev, dumplo);
printf("dump ");
switch ((*bdevsw[major(dumpdev)].d_dump)(dumpdev)) {
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;
}
}
initcpu()
{
parityenable();
#ifdef USELEDS
ledinit();
#endif
}
straytrap(pc, evec)
int pc;
u_short evec;
{
printf("unexpected trap (vector offset %x) from %x\n",
evec & 0xFFF, pc);
}
int *nofault;
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);
}
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);
}
netintr()
{
#ifdef INET
if (netisr & (1 << NETISR_ARP)) {
netisr &= ~(1 << NETISR_ARP);
arpintr();
}
if (netisr & (1 << NETISR_IP)) {
netisr &= ~(1 << NETISR_IP);
ipintr();
}
#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
#ifdef CCITT
if (netisr & (1 << NETISR_CCITT)) {
netisr &= ~(1 << NETISR_CCITT);
ccittintr();
}
#endif
}
intrhand(sr)
int sr;
{
register struct isr *isr;
register int found = 0;
register int ipl;
extern struct isr isrqueue[];
ipl = (sr >> 8) & 7;
switch (ipl) {
case 3:
case 4:
case 5:
ipl = ISRIPL(ipl);
isr = isrqueue[ipl].isr_forw;
for (; isr != &isrqueue[ipl]; isr = isr->isr_forw) {
if ((isr->isr_intr)(isr->isr_arg)) {
found++;
break;
}
}
if (found == 0)
printf("stray interrupt, sr 0x%x\n", sr);
break;
case 0:
case 1:
case 2:
case 6:
case 7:
printf("intrhand: unexpected sr 0x%x\n", sr);
break;
}
}
#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(arg)
void *arg;
{
crashandburn = 0;
}
#endif
/*
* 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, (void *)0, candbdelay);
}
#endif
return;
}
if (parityerror(&frame))
return;
/* panic?? */
printf("unexpected level 7 interrupt ignored\n");
}
/*
* Parity error section. Contains magic.
*/
#define PARREG ((volatile short *)IIOV(0x5B0000))
static int gotparmem = 0;
#ifdef DEBUG
int ignorekperr = 0; /* ignore kernel parity errors */
#endif
/*
* Enable parity detection
*/
parityenable()
{
label_t faultbuf;
nofault = (int *) &faultbuf;
if (setjmp((label_t *)nofault)) {
nofault = (int *) 0;
#ifdef DEBUG
printf("No parity memory\n");
#endif
return;
}
*PARREG = 1;
nofault = (int *) 0;
gotparmem = 1;
#ifdef DEBUG
printf("Parity detection enabled\n");
#endif
}
/*
* Determine if level 7 interrupt was caused by a parity error
* and deal with it if it was. Returns 1 if it was a parity error.
*/
parityerror(fp)
struct frame *fp;
{
if (!gotparmem)
return(0);
*PARREG = 0;
DELAY(10);
*PARREG = 1;
if (panicstr) {
printf("parity error after panic ignored\n");
return(1);
}
if (!findparerror())
printf("WARNING: transient parity error ignored\n");
else if (USERMODE(fp->f_sr)) {
printf("pid %d: parity error\n", curproc->p_pid);
uprintf("sorry, pid %d killed due to memory parity error\n",
curproc->p_pid);
psignal(curproc, SIGKILL);
#ifdef DEBUG
} else if (ignorekperr) {
printf("WARNING: kernel parity error ignored\n");
#endif
} else {
regdump(fp, 128);
panic("kernel parity error");
}
return(1);
}
/*
* Yuk! There has got to be a better way to do this!
* Searching all of memory with interrupts blocked can lead to disaster.
*/
findparerror()
{
static label_t parcatch;
static int looking = 0;
volatile struct pte opte;
volatile int pg, o, s;
register volatile int *ip;
register int i;
int found;
#ifdef lint
ip = &found;
i = o = pg = 0; if (i) return(0);
#endif
/*
* If looking is true we are searching for a known parity error
* and it has just occured. All we do is return to the higher
* level invocation.
*/
if (looking)
longjmp(&parcatch);
s = splhigh();
/*
* If setjmp returns true, the parity error we were searching
* for has just occured (longjmp above) at the current pg+o
*/
if (setjmp(&parcatch)) {
printf("Parity error at 0x%x\n", ctob(pg)|o);
found = 1;
goto done;
}
/*
* If we get here, a parity error has occured for the first time
* and we need to find it. We turn off any external caches and
* loop thru memory, testing every longword til a fault occurs and
* we regain control at setjmp above. Note that because of the
* setjmp, pg and o need to be volatile or their values will be lost.
*/
looking = 1;
ecacheoff();
for (pg = btoc(lowram); pg < btoc(lowram)+physmem; pg++) {
pmap_enter(kernel_pmap, (vm_offset_t)vmmap, ctob(pg),
VM_PROT_READ, TRUE);
for (o = 0; o < NBPG; o += sizeof(int))
i = *(int *)(&vmmap[o]);
}
/*
* Getting here implies no fault was found. Should never happen.
*/
printf("Couldn't locate parity error\n");
found = 0;
done:
looking = 0;
pmap_remove(kernel_pmap, (vm_offset_t)vmmap,
(vm_offset_t)&vmmap[NBPG]);
ecacheon();
splx(s);
return(found);
}
regdump(fp, sbytes)
struct frame *fp; /* must not be register */
int sbytes;
{
static int doingdump = 0;
register int i;
int s;
extern char *hexstr();
if (doingdump)
return;
s = splhigh();
doingdump = 1;
printf("pid = %d, pc = %s, ",
curproc ? curproc->p_pid : -1, hexstr(fp->f_pc, 8));
printf("ps = %s, ", hexstr(fp->f_sr, 4));
printf("sfc = %s, ", hexstr(getsfc(), 4));
printf("dfc = %s\n", hexstr(getdfc(), 4));
printf("Registers:\n ");
for (i = 0; i < 8; i++)
printf(" %d", i);
printf("\ndreg:");
for (i = 0; i < 8; i++)
printf(" %s", hexstr(fp->f_regs[i], 8));
printf("\nareg:");
for (i = 0; i < 8; i++)
printf(" %s", hexstr(fp->f_regs[i+8], 8));
if (sbytes > 0) {
if (fp->f_sr & PSL_S) {
printf("\n\nKernel stack (%s):",
hexstr((int)(((int *)&fp)-1), 8));
dumpmem(((int *)&fp)-1, sbytes, 0);
} else {
printf("\n\nUser stack (%s):", hexstr(fp->f_regs[SP], 8));
dumpmem((int *)fp->f_regs[SP], sbytes, 1);
}
}
doingdump = 0;
splx(s);
}
extern char kstack[];
#define KSADDR ((int *)&(kstack[(UPAGES-1)*NBPG]))
dumpmem(ptr, sz, ustack)
register int *ptr;
int sz;
{
register int i, val;
extern char *hexstr();
for (i = 0; i < sz; i++) {
if ((i & 7) == 0)
printf("\n%s: ", hexstr((int)ptr, 6));
else
printf(" ");
if (ustack == 1) {
if ((val = fuword(ptr++)) == -1)
break;
} else {
if (ustack == 0 &&
(ptr < KSADDR || ptr > KSADDR+(NBPG/4-1)))
break;
val = *ptr++;
}
printf("%s", hexstr(val, 8));
}
printf("\n");
}
char *
hexstr(val, len)
register int val;
{
static char nbuf[9];
register int x, i;
if (len > 8)
return("");
nbuf[len] = '\0';
for (i = len-1; i >= 0; --i) {
x = val & 0xF;
if (x > 9)
nbuf[i] = x - 10 + 'A';
else
nbuf[i] = x + '0';
val >>= 4;
}
return(nbuf);
}
#ifdef DEBUG
char oflowmsg[] = "k-stack overflow";
char uflowmsg[] = "k-stack underflow";
badkstack(oflow, fr)
int oflow;
struct frame fr;
{
extern char kstackatbase[];
printf("%s: sp should be %x\n",
oflow ? oflowmsg : uflowmsg,
kstackatbase - (exframesize[fr.f_format] + 8));
regdump(&fr, 0);
panic(oflow ? oflowmsg : uflowmsg);
}
#endif