146 lines
4.0 KiB
ArmAsm
146 lines
4.0 KiB
ArmAsm
/* $NetBSD: sa11x0_irq.S,v 1.5 2003/03/31 19:52:35 chris Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1998 Mark Brinicombe.
|
|
* Copyright (c) 1998 Causality Limited
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to the NetBSD Foundation
|
|
* by IWAMOTO Toshihiro.
|
|
*
|
|
* 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 Mark Brinicombe
|
|
* for the NetBSD Project.
|
|
* 4. The name of the company nor the name of the author may 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 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.
|
|
*
|
|
*/
|
|
|
|
#include "assym.s"
|
|
#include <machine/asm.h>
|
|
#include <machine/armreg.h>
|
|
#include <machine/asmacros.h>
|
|
#include <arm/sa11x0/sa11x0_reg.h>
|
|
__FBSDID("$FreeBSD$");
|
|
Lcurrent_intr_depth:
|
|
.word _C_LABEL(current_intr_depth)
|
|
|
|
.globl _C_LABEL(saipic_base)
|
|
_C_LABEL(saipic_base):
|
|
.word 0x00000000
|
|
|
|
#ifdef INTR_DEBUG
|
|
Ldbg_str:
|
|
.asciz "irq_entry %x %x\n"
|
|
#endif
|
|
|
|
AST_LOCALS
|
|
/*
|
|
* Regsister usage
|
|
*
|
|
* r6 - Address of current handler
|
|
* r7 - Pointer to handler pointer list
|
|
* r8 - Current IRQ requests.
|
|
* r9 - Used to count through possible IRQ bits.
|
|
* r10 - Base address of SAIP
|
|
*/
|
|
|
|
ASENTRY_NP(irq_entry)
|
|
sub lr, lr, #0x00000004 /* Adjust the lr */
|
|
|
|
PUSHFRAMEINSVC /* Push an interrupt frame */
|
|
|
|
/* Load r8 with the SAIPIC interrupt requests */
|
|
|
|
ldr r10, _C_LABEL(saipic_base)
|
|
ldr r8, [r10, #(SAIPIC_IP)] /* Load IRQ pending register */
|
|
|
|
#ifdef INTR_DEBUG
|
|
ldr r2, [r10, #(SAIPIC_MR)]
|
|
adr r0, Ldbg_str
|
|
mov r1, r8
|
|
bl _C_LABEL(printf)
|
|
#endif
|
|
/*
|
|
* Note that we have entered the IRQ handler.
|
|
* We are in SVC mode so we cannot use the processor mode
|
|
* to determine if we are in an IRQ. Instead we will count the
|
|
* each time the interrupt handler is nested.
|
|
*/
|
|
|
|
ldr r0, Lcurrent_intr_depth
|
|
ldr r1, [r0]
|
|
add r1, r1, #1
|
|
str r1, [r0]
|
|
|
|
mov r0, sp
|
|
mov r1, r8
|
|
bl _C_LABEL(arm_handler_execute)
|
|
|
|
#ifdef INTR_DEBUG
|
|
adr r0, Ldbg_str
|
|
mov r1, #3
|
|
ldr r2, [r10, #(SAIPIC_MR)]
|
|
bl _C_LABEL(printf)
|
|
#endif
|
|
|
|
/* Decrement the nest count */
|
|
ldr r0, Lcurrent_intr_depth
|
|
ldr r1, [r0]
|
|
sub r1, r1, #1
|
|
str r1, [r0]
|
|
|
|
DO_AST
|
|
PULLFRAMEFROMSVCANDEXIT
|
|
|
|
/* NOT REACHED */
|
|
b . - 8
|
|
Lcnt:
|
|
.word _C_LABEL(cnt)
|
|
|
|
ENTRY(sa11x0_activateirqs)
|
|
ldr r0, _C_LABEL(saipic_base)
|
|
mov r1, #0xffffffff
|
|
str r1, [r0, #(SAIPIC_MR)]
|
|
mov pc, lr
|
|
#ifdef IRQSTATS
|
|
Lintrcnt:
|
|
.word _C_LABEL(intrcnt)
|
|
#endif
|
|
|
|
.global _C_LABEL(intrnames), _C_LABEL(eintrnames)
|
|
.global _C_LABEL(eintrcnt)
|
|
_C_LABEL(intrnames):
|
|
_C_LABEL(eintrnames):
|
|
_C_LABEL(eintrcnt):
|
|
|
|
.globl _C_LABEL(intrcnt), _C_LABEL(sintrcnt)
|
|
|
|
_C_LABEL(intrcnt):
|
|
.space ICU_LEN*4 /* XXX Should be linked to number of interrupts */
|
|
|
|
_C_LABEL(sintrcnt):
|
|
.space 32*4
|