117 lines
3.4 KiB
ArmAsm
117 lines
3.4 KiB
ArmAsm
/* $NetBSD: pxa2x0_irq.S,v 1.1 2002/10/19 19:31:40 bsh Exp $ */
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/*
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* This code is derived from i80200_irq.S by Jason R. Thorpe.
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*/
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/*
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* Copyright (c) 2002 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "assym.h"
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#include <machine/asm.h>
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#include <machine/cpu.h>
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#include <machine/frame.h>
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/*
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* irq_entry:
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* Main entry point for the IRQ vector.
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*/
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.text
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.align 0
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Lastpending:
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.word _C_LABEL(astpending)
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ASENTRY_NP(irq_entry)
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sub lr, lr, #0x00000004 /* Adjust the lr */
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PUSHFRAMEINSVC /* Push an interrupt frame */
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mov r0, sp
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bl _C_LABEL(pxa2x0_irq_handler)
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1:
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/*
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* If we're returning to user mode, check for pending ASTs.
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*/
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ldr r0, [sp] /* Get the SPSR from stack */
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and r0, r0, #(PSR_MODE) /* Test for USR32 mode before the IRQ */
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teq r0, #(PSR_USR32_MODE)
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bne Lirqout /* Nope, get out now */
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Lastloop:
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ldr r0, Lastpending /* Do we have an AST pending? */
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ldr r1, [r0]
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teq r1, #0x00000000
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beq Lirqout /* Nope, get out now */
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mov r1, #0x00000000
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str r1, [r0] /* Clear astpending */
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mrs r4, cpsr_all /* save CPSR */
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bic r0, r4, #(I32_bit) /* Enable IRQs */
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msr cpsr_all, r0
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mov r0, sp
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bl _C_LABEL(ast) /* ast(frame) */
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msr cpsr_all, r4 /* Disable IRQs */
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b Lastloop /* Check for more ASTs */
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Lirqout:
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PULLFRAMEFROMSVCANDEXIT
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movs pc, lr /* Exit */
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.bss
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.align 0
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.global _C_LABEL(astpending)
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_C_LABEL(astpending):
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.word 0
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/*
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* XXX Provide intrnames/intrcnt for legacy code, but
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* don't actually use them.
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*/
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.global _C_LABEL(intrnames), _C_LABEL(eintrnames)
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.global _C_LABEL(intrcnt), _C_LABEL(eintrcnt)
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_C_LABEL(intrnames):
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_C_LABEL(eintrnames):
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.global _C_LABEL(intrcnt), _C_LABEL(sintrcnt), _C_LABEL(eintrcnt)
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_C_LABEL(intrcnt):
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_C_LABEL(eintrcnt):
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