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/* $NetBSD: irq_dispatch.S,v 1.17 2020/11/21 19:46:13 skrll Exp $ */
/*
* Copyright (c) 2002 Fujitsu Component Limited
* Copyright (c) 2002 Genetec Corporation
* 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. Neither the name of The Fujitsu Component Limited nor the name of
* Genetec corporation may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY FUJITSU COMPONENT LIMITED AND GENETEC
* CORPORATION ``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 FUJITSU COMPONENT LIMITED OR GENETEC
* CORPORATION 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.
*/
/*
* Copyright (c) 2002, 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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 for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "assym.h"
#include <machine/asm.h>
#include <arm/locore.h>
#include "opt_arm_intr_impl.h"
#ifdef ARM_INTR_IMPL
#include ARM_INTR_IMPL
#else
#error ARM_INTR_IMPL not defined
#endif
#ifndef ARM_IRQ_HANDLER
#error ARM_IRQ_HANDLER not defined
#endif
/*
* irq_entry:
* Main entry point for the IRQ vector. This is a generic version
* which can be used by different platforms.
*/
.text
.p2align 5
ARM_ASENTRY_NP(irq_entry)
sub lr, lr, #0x00000004 /* Adjust the lr */
PUSHFRAMEINSVC /* Push an interrupt frame */
ENABLE_ALIGNMENT_FAULTS /* puts cur{cpu,lwp} in r4/r5 */
#ifdef _ARM_ARCH_7
clrex /* force all strex to fail */
dmb /* synchronize memory writes */
#endif
/*
* Increment the interrupt nesting depth and call the interrupt
* dispatch routine. We've pushed a frame, so we can safely use
* callee-saved regs here. We use the following registers, which
* we expect to persist:
*
* r4 address of current cpu_info (curcpu)
* r5 address of current lwp (curlwp)
* r6 old value of `ci_intr_depth'
*/
ldr r6, [r4, #CI_INTR_DEPTH]
add r1, r6, #1
str r1, [r4, #CI_INTR_DEPTH]
mov r0, sp /* arg for dispatcher */
bl ARM_IRQ_HANDLER
/*
* Restore the old interrupt depth value (which should be the
* same as decrementing it at this point).
*/
str r6, [r4, #CI_INTR_DEPTH]
LOCK_CAS_CHECK
DO_AST_AND_RESTORE_ALIGNMENT_FAULTS
PULLFRAMEFROMSVCANDEXIT
#ifdef __thumb__
subs pc, lr, #0 /* Exit */
#else
movs pc, lr /* Exit */
#endif
.align 0
LOCK_CAS_CHECK_LOCALS
AST_ALIGNMENT_FAULT_LOCALS
ASEND(irq_entry)
.p2align 5
ARM_ASENTRY_NP(irq_idle_entry)
PUSHIDLEFRAME
/*
* Increment the interrupt nesting depth and call the interrupt
* dispatch routine. We've pushed a frame, so we can safely use
* callee-saved regs here. We use the following registers, which
* we expect to persist:
*
* r4 address of current cpu_info
* r6 old value of `ci_intr_depth'
*/
GET_CURCPU(r4)
ldr r6, [r4, #CI_INTR_DEPTH]
add r1, r6, #1
str r1, [r4, #CI_INTR_DEPTH]
#ifdef _ARM_ARCH_7
clrex /* force all strex to fail */
dmb /* synchronize memory writes */
#endif
mov r0, sp /* arg for dispatcher */
bl ARM_IRQ_HANDLER
/*
* Restore the old interrupt depth value (which should be the
* same as decrementing it at this point).
*/
str r6, [r4, #CI_INTR_DEPTH]
#if defined(__HAVE_FAST_SOFTINTS) && !defined(__HAVE_PIC_FAST_SOFTINTS)
ldr r2, [r4, #CI_CPL] /* Get current priority level */
ldr r3, [r4, #CI_SOFTINTS] /* Get pending softint mask */
#endif
PULLIDLEFRAME /* restore r4, r6, sp, lr */
#if defined(__HAVE_FAST_SOFTINTS) && !defined(__HAVE_PIC_FAST_SOFTINTS)
lsrs r3, r3, r2 /* shift mask by cpl */
bne _C_LABEL(dosoftints) /* dosoftints(void) */
#endif
RET
ASEND(irq_idle_entry)
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