e69dff491d
instead of a PCPU field for curthread. This averts a race on SMP systems with a high interrupt rate where the thread looking up the value of curthread could be preempted and migrated between obtaining the PCPU pointer and reading the value of pc_curthread, resulting in curthread being observed to be the current thread on the thread's original CPU. This played merry havoc with the system, in particular with mutexes. Many thanks to jhb for helping me work this one out. Note that Book-E is in principle susceptible to the same problem, but has not been modified yet due to lack of Book-E hardware. MFC after: 2 weeks
145 lines
4.0 KiB
C
145 lines
4.0 KiB
C
/*-
|
|
* Copyright (C) 2006 Semihalf, Rafal Jaworowski <raj@semihalf.com>
|
|
* Copyright 2002 by Peter Grehan.
|
|
* 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. 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.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Interrupts are dispatched to here from locore asm
|
|
*/
|
|
|
|
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/interrupt.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/kthread.h>
|
|
#include <sys/ktr.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/smp.h>
|
|
#include <sys/unistd.h>
|
|
#include <sys/vmmeter.h>
|
|
|
|
#include <machine/cpu.h>
|
|
#include <machine/db_machdep.h>
|
|
#include <machine/frame.h>
|
|
#include <machine/intr_machdep.h>
|
|
#include <machine/md_var.h>
|
|
#include <machine/pcb.h>
|
|
#include <machine/psl.h>
|
|
#include <machine/trap.h>
|
|
|
|
#include "pic_if.h"
|
|
|
|
extern void decr_intr(struct trapframe *);
|
|
|
|
void powerpc_decr_interrupt(struct trapframe *);
|
|
void powerpc_extr_interrupt(struct trapframe *);
|
|
void powerpc_crit_interrupt(struct trapframe *);
|
|
void powerpc_mchk_interrupt(struct trapframe *);
|
|
|
|
static void dump_frame(struct trapframe *framep);
|
|
|
|
static void
|
|
dump_frame(struct trapframe *frame)
|
|
{
|
|
int i;
|
|
|
|
printf("\n*** *** STACK FRAME DUMP *** ***\n");
|
|
printf(" exc = 0x%x\n", frame->exc);
|
|
printf(" srr0 = 0x%08x\n", frame->srr0);
|
|
printf(" srr1 = 0x%08x\n", frame->srr1);
|
|
printf(" dear = 0x%08x\n", frame->cpu.booke.dear);
|
|
printf(" esr = 0x%08x\n", frame->cpu.booke.esr);
|
|
printf(" lr = 0x%08x\n", frame->lr);
|
|
printf(" cr = 0x%08x\n", frame->cr);
|
|
printf(" sp = 0x%08x\n", frame->fixreg[1]);
|
|
|
|
for (i = 0; i < 32; i++) {
|
|
printf(" R%02d = 0x%08x", i, frame->fixreg[i]);
|
|
if ((i & 0x3) == 3)
|
|
printf("\n");
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
void powerpc_crit_interrupt(struct trapframe *framep)
|
|
{
|
|
|
|
printf("powerpc_crit_interrupt: critical interrupt!\n");
|
|
dump_frame(framep);
|
|
trap(framep);
|
|
}
|
|
|
|
void powerpc_mchk_interrupt(struct trapframe *framep)
|
|
{
|
|
|
|
printf("powerpc_mchk_interrupt: machine check interrupt!\n");
|
|
dump_frame(framep);
|
|
trap(framep);
|
|
}
|
|
|
|
/*
|
|
* Decrementer interrupt routine
|
|
*/
|
|
void
|
|
powerpc_decr_interrupt(struct trapframe *framep)
|
|
{
|
|
struct thread *td;
|
|
struct trapframe *oldframe;
|
|
|
|
td = curthread;
|
|
critical_enter();
|
|
atomic_add_int(&td->td_intr_nesting_level, 1);
|
|
oldframe = td->td_intr_frame;
|
|
td->td_intr_frame = framep;
|
|
decr_intr(framep);
|
|
td->td_intr_frame = oldframe;
|
|
atomic_subtract_int(&td->td_intr_nesting_level, 1);
|
|
critical_exit();
|
|
framep->srr1 &= ~PSL_WE;
|
|
}
|
|
|
|
/*
|
|
* External input interrupt routine
|
|
*/
|
|
void
|
|
powerpc_extr_interrupt(struct trapframe *framep)
|
|
{
|
|
|
|
critical_enter();
|
|
PIC_DISPATCH(root_pic, framep);
|
|
critical_exit();
|
|
framep->srr1 &= ~PSL_WE;
|
|
}
|