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NetBSD/sys/arch/arm/arm32/irq_dispatch.S

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Assume that if curpcb is NULL, we're already running with alignment faults enabled.
2003-10-26 14:34:29 +03:00
/* $NetBSD: irq_dispatch.S,v 1.4 2003/10/26 11:34:29 scw Exp $ */
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
/*
* 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.
*/
Clean up evbarm interrupt support a little: * Define an ARM_INTR_IMPL option, which specifies a header file describing the interrupt implementation for the platform. Use this instead of the list of EVBARM_BOARDTYPE checks. * Make the s3c2xx0 interrupt dispatch code a bit more generic, and move it to a generic location so that other platforms can use it. This eliminates all uses of the EVBARM_BOARDTYPE stuff, so delete it.
2003-01-03 02:37:53 +03:00
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
/*
Clean up evbarm interrupt support a little: * Define an ARM_INTR_IMPL option, which specifies a header file describing the interrupt implementation for the platform. Use this instead of the list of EVBARM_BOARDTYPE checks. * Make the s3c2xx0 interrupt dispatch code a bit more generic, and move it to a generic location so that other platforms can use it. This eliminates all uses of the EVBARM_BOARDTYPE stuff, so delete it.
2003-01-03 02:37:53 +03:00
* Copyright (c) 2002, 2003 Wasabi Systems, Inc.
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
* 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 <machine/cpu.h>
#include <machine/frame.h>
Oops, forgot to commit this along with the others... Enable alignment faults on arm32 for both kernel and userland. If COMPAT_15 and EXEC_AOUT are defined, support per-process alignment checking where AFLTs are always enabled when running kernel code and userland ELF binaries, and dynamically disabled/ enabled when switching to/from a.out binaries. This is necessary in order to execute older a.out binaries, where gcc made deliberate use of misaligned loads under certain circumstances.
2003-10-26 00:42:49 +04:00
#include "opt_compat_netbsd.h"
#include "opt_execfmt.h"
#include "opt_multiprocessor.h"
Clean up evbarm interrupt support a little: * Define an ARM_INTR_IMPL option, which specifies a header file describing the interrupt implementation for the platform. Use this instead of the list of EVBARM_BOARDTYPE checks. * Make the s3c2xx0 interrupt dispatch code a bit more generic, and move it to a generic location so that other platforms can use it. This eliminates all uses of the EVBARM_BOARDTYPE stuff, so delete it.
2003-01-03 02:37:53 +03:00
#include "opt_arm_intr_impl.h"
#ifdef ARM_INTR_IMPL
#include ARM_INTR_IMPL
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
#else
Clean up evbarm interrupt support a little: * Define an ARM_INTR_IMPL option, which specifies a header file describing the interrupt implementation for the platform. Use this instead of the list of EVBARM_BOARDTYPE checks. * Make the s3c2xx0 interrupt dispatch code a bit more generic, and move it to a generic location so that other platforms can use it. This eliminates all uses of the EVBARM_BOARDTYPE stuff, so delete it.
2003-01-03 02:37:53 +03:00
#error ARM_INTR_IMPL not defined
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
#endif
Clean up evbarm interrupt support a little: * Define an ARM_INTR_IMPL option, which specifies a header file describing the interrupt implementation for the platform. Use this instead of the list of EVBARM_BOARDTYPE checks. * Make the s3c2xx0 interrupt dispatch code a bit more generic, and move it to a generic location so that other platforms can use it. This eliminates all uses of the EVBARM_BOARDTYPE stuff, so delete it.
2003-01-03 02:37:53 +03:00
#ifndef ARM_IRQ_HANDLER
#error ARM_IRQ_HANDLER not defined
#endif
Oops, forgot to commit this along with the others... Enable alignment faults on arm32 for both kernel and userland. If COMPAT_15 and EXEC_AOUT are defined, support per-process alignment checking where AFLTs are always enabled when running kernel code and userland ELF binaries, and dynamically disabled/ enabled when switching to/from a.out binaries. This is necessary in order to execute older a.out binaries, where gcc made deliberate use of misaligned loads under certain circumstances.
2003-10-26 00:42:49 +04:00
#if defined(COMPAT_15) && defined(EXEC_AOUT)
.Lcpufuncs:
.word _C_LABEL(cpufuncs)
#ifndef MULTIPROCESSOR
.Lcurpcb:
.word _C_LABEL(curpcb)
.Lcpu_info_store:
.word _C_LABEL(cpu_info_store)
#define GET_CURPCB \
ldr r1, .Lcurpcb ;\
ldr r1, [r1]
#define GET_CPUINFO \
ldr r0, .Lcpu_info_store
#else
.Lcpu_info:
.word _C_LABEL(cpu_info)
#define GET_CURPCB \
ldr r4, .Lcpu_info ;\
bl _C_LABEL(cpu_number) ;\
ldr r0, [r4, r0, lsl #2] ;\
ldr r1, [r0, #CI_CURPCB]
#define GET_CPUINFO /* nothing to do */
#endif
#define ENABLE_ALIGNMENT_FAULTS \
GET_CURPCB ;\
Assume that if curpcb is NULL, we're already running with alignment faults enabled.
2003-10-26 14:34:29 +03:00
cmp r1, #0x00 /* curpcb NULL? */ ;\
ldrne r1, [r1, #PCB_FLAGS] /* Fetch curpcb->pcb_flags */ ;\
tstne r1, #PCB_NOALIGNFLT ;\
Oops, forgot to commit this along with the others... Enable alignment faults on arm32 for both kernel and userland. If COMPAT_15 and EXEC_AOUT are defined, support per-process alignment checking where AFLTs are always enabled when running kernel code and userland ELF binaries, and dynamically disabled/ enabled when switching to/from a.out binaries. This is necessary in order to execute older a.out binaries, where gcc made deliberate use of misaligned loads under certain circumstances.
2003-10-26 00:42:49 +04:00
beq 1f /* Alignment faults already enabled */ ;\
GET_CPUINFO ;\
ldr r2, .Lcpufuncs ;\
ldr r1, [r0, #CI_CTRL] /* Fetch control register */ ;\
mov r0, #-1 ;\
mov lr, pc ;\
ldr pc, [r2, #CF_CONTROL] /* Enable alignment faults */ ;\
1:
#endif /* COMPAT_15 && EXEC_AOUT */
Clean up evbarm interrupt support a little: * Define an ARM_INTR_IMPL option, which specifies a header file describing the interrupt implementation for the platform. Use this instead of the list of EVBARM_BOARDTYPE checks. * Make the s3c2xx0 interrupt dispatch code a bit more generic, and move it to a generic location so that other platforms can use it. This eliminates all uses of the EVBARM_BOARDTYPE stuff, so delete it.
2003-01-03 02:37:53 +03:00
/*
* irq_entry:
* Main entry point for the IRQ vector. This is a generic version
* which can be used by different platforms.
*/
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
.text
.align 0
Clean up evbarm interrupt support a little: * Define an ARM_INTR_IMPL option, which specifies a header file describing the interrupt implementation for the platform. Use this instead of the list of EVBARM_BOARDTYPE checks. * Make the s3c2xx0 interrupt dispatch code a bit more generic, and move it to a generic location so that other platforms can use it. This eliminates all uses of the EVBARM_BOARDTYPE stuff, so delete it.
2003-01-03 02:37:53 +03:00
.Lastpending:
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
.word _C_LABEL(astpending)
Fiddle with current_intr_depth in assembly code again. Because we have just pushed a frame, we can make some assumptions that the compiler cannot as easily make, and can thus do it slightly more efficiently.
2003-01-03 03:38:16 +03:00
.Lcurrent_intr_depth:
.word _C_LABEL(current_intr_depth)
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
ASENTRY_NP(irq_entry)
sub lr, lr, #0x00000004 /* Adjust the lr */
PUSHFRAMEINSVC /* Push an interrupt frame */
Oops, forgot to commit this along with the others... Enable alignment faults on arm32 for both kernel and userland. If COMPAT_15 and EXEC_AOUT are defined, support per-process alignment checking where AFLTs are always enabled when running kernel code and userland ELF binaries, and dynamically disabled/ enabled when switching to/from a.out binaries. This is necessary in order to execute older a.out binaries, where gcc made deliberate use of misaligned loads under certain circumstances.
2003-10-26 00:42:49 +04:00
#if defined(COMPAT_15) && defined(EXEC_AOUT)
and r0, r0, #(PSR_MODE) /* Test for USR32 mode (r0 = spsr_all)*/
teq r0, #(PSR_USR32_MODE)
bne 99f /* Not USR mode so skip AFLT check */
ENABLE_ALIGNMENT_FAULTS
99:
#endif
Fiddle with current_intr_depth in assembly code again. Because we have just pushed a frame, we can make some assumptions that the compiler cannot as easily make, and can thus do it slightly more efficiently.
2003-01-03 03:38:16 +03:00
/*
* 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 presist:
*
* r5 address of `current_intr_depth' variable
* r6 old value of `current_intr_depth'
*/
ldr r5, .Lcurrent_intr_depth
mov r0, sp /* arg for dispatcher */
ldr r6, [r5]
add r1, r6, #1
str r1, [r5]
Clean up evbarm interrupt support a little: * Define an ARM_INTR_IMPL option, which specifies a header file describing the interrupt implementation for the platform. Use this instead of the list of EVBARM_BOARDTYPE checks. * Make the s3c2xx0 interrupt dispatch code a bit more generic, and move it to a generic location so that other platforms can use it. This eliminates all uses of the EVBARM_BOARDTYPE stuff, so delete it.
2003-01-03 02:37:53 +03:00
bl ARM_IRQ_HANDLER
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
Fiddle with current_intr_depth in assembly code again. Because we have just pushed a frame, we can make some assumptions that the compiler cannot as easily make, and can thus do it slightly more efficiently.
2003-01-03 03:38:16 +03:00
/*
* Restore the old interrupt depth value (which should be the
* same as decrementing it at this point).
*/
str r6, [r5]
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
/*
* If we're returning to user mode, check for pending ASTs.
*/
ldr r0, [sp] /* Get the SPSR from stack */
and r0, r0, #(PSR_MODE) /* Test for USR32 mode before the IRQ */
teq r0, #(PSR_USR32_MODE)
Oops, forgot to commit this along with the others... Enable alignment faults on arm32 for both kernel and userland. If COMPAT_15 and EXEC_AOUT are defined, support per-process alignment checking where AFLTs are always enabled when running kernel code and userland ELF binaries, and dynamically disabled/ enabled when switching to/from a.out binaries. This is necessary in order to execute older a.out binaries, where gcc made deliberate use of misaligned loads under certain circumstances.
2003-10-26 00:42:49 +04:00
bne .Lirq_do_exit /* Nope, get out now */
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
Oops, forgot to commit this along with the others... Enable alignment faults on arm32 for both kernel and userland. If COMPAT_15 and EXEC_AOUT are defined, support per-process alignment checking where AFLTs are always enabled when running kernel code and userland ELF binaries, and dynamically disabled/ enabled when switching to/from a.out binaries. This is necessary in order to execute older a.out binaries, where gcc made deliberate use of misaligned loads under certain circumstances.
2003-10-26 00:42:49 +04:00
ldr r5, .Lastpending
#if defined(COMPAT_15) && defined(EXEC_AOUT) && !defined(MULTIPROCESSOR)
ldr r6, .Lcurpcb
ldr r7, .Lcpu_info_store
#endif
.Lirq_ast_loop:
ldr r1, [r5] /* Do we have an AST pending? */
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
teq r1, #0x00000000
Oops, forgot to commit this along with the others... Enable alignment faults on arm32 for both kernel and userland. If COMPAT_15 and EXEC_AOUT are defined, support per-process alignment checking where AFLTs are always enabled when running kernel code and userland ELF binaries, and dynamically disabled/ enabled when switching to/from a.out binaries. This is necessary in order to execute older a.out binaries, where gcc made deliberate use of misaligned loads under certain circumstances.
2003-10-26 00:42:49 +04:00
bne .Lirq_do_ast /* Yup. Go deal with it */
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
Oops, forgot to commit this along with the others... Enable alignment faults on arm32 for both kernel and userland. If COMPAT_15 and EXEC_AOUT are defined, support per-process alignment checking where AFLTs are always enabled when running kernel code and userland ELF binaries, and dynamically disabled/ enabled when switching to/from a.out binaries. This is necessary in order to execute older a.out binaries, where gcc made deliberate use of misaligned loads under certain circumstances.
2003-10-26 00:42:49 +04:00
#if defined(COMPAT_15) && defined(EXEC_AOUT)
/* Disable alignment faults for the process, if necessary. */
#ifdef MULTIPROCESSOR
ldr r7, .Lcpu_info
bl _C_LABEL(cpu_number)
ldr r7, [r7, r0, lsl #2]
ldr r1, [r7, #CI_CURPCB]
#else
ldr r1, [r6]
#endif
Assume that if curpcb is NULL, we're already running with alignment faults enabled.
2003-10-26 14:34:29 +03:00
cmp r1, #0x00 /* curpcb NULL? */
ldrne r1, [r1, #PCB_FLAGS] /* Fetch curpcb->pcb_flags */
tstne r1, #PCB_NOALIGNFLT
Oops, forgot to commit this along with the others... Enable alignment faults on arm32 for both kernel and userland. If COMPAT_15 and EXEC_AOUT are defined, support per-process alignment checking where AFLTs are always enabled when running kernel code and userland ELF binaries, and dynamically disabled/ enabled when switching to/from a.out binaries. This is necessary in order to execute older a.out binaries, where gcc made deliberate use of misaligned loads under certain circumstances.
2003-10-26 00:42:49 +04:00
beq 1f /* Keep alignment faults enabled */
ldr r1, [r7, #CI_CTRL] /* Fetch control register */
ldr r2, .Lcpufuncs
mov r0, #-1
bic r1, r1, #CPU_CONTROL_AFLT_ENABLE /* Disable alignment faults */
mov lr, pc
ldr pc, [r2, #CF_CONTROL] /* Set the new control register value */
1:
#endif
.Lirq_do_exit:
PULLFRAMEFROMSVCANDEXIT
movs pc, lr /* Exit */
.Lirq_do_ast:
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
mov r1, #0x00000000
Oops, forgot to commit this along with the others... Enable alignment faults on arm32 for both kernel and userland. If COMPAT_15 and EXEC_AOUT are defined, support per-process alignment checking where AFLTs are always enabled when running kernel code and userland ELF binaries, and dynamically disabled/ enabled when switching to/from a.out binaries. This is necessary in order to execute older a.out binaries, where gcc made deliberate use of misaligned loads under certain circumstances.
2003-10-26 00:42:49 +04:00
str r1, [r5] /* Clear astpending */
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
Clean up evbarm interrupt support a little: * Define an ARM_INTR_IMPL option, which specifies a header file describing the interrupt implementation for the platform. Use this instead of the list of EVBARM_BOARDTYPE checks. * Make the s3c2xx0 interrupt dispatch code a bit more generic, and move it to a generic location so that other platforms can use it. This eliminates all uses of the EVBARM_BOARDTYPE stuff, so delete it.
2003-01-03 02:37:53 +03:00
mrs r4, cpsr /* save CPSR */
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
bic r0, r4, #(I32_bit) /* Enable IRQs */
Clean up evbarm interrupt support a little: * Define an ARM_INTR_IMPL option, which specifies a header file describing the interrupt implementation for the platform. Use this instead of the list of EVBARM_BOARDTYPE checks. * Make the s3c2xx0 interrupt dispatch code a bit more generic, and move it to a generic location so that other platforms can use it. This eliminates all uses of the EVBARM_BOARDTYPE stuff, so delete it.
2003-01-03 02:37:53 +03:00
msr cpsr_c, r0
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
mov r0, sp
bl _C_LABEL(ast) /* ast(frame) */
Clean up evbarm interrupt support a little: * Define an ARM_INTR_IMPL option, which specifies a header file describing the interrupt implementation for the platform. Use this instead of the list of EVBARM_BOARDTYPE checks. * Make the s3c2xx0 interrupt dispatch code a bit more generic, and move it to a generic location so that other platforms can use it. This eliminates all uses of the EVBARM_BOARDTYPE stuff, so delete it.
2003-01-03 02:37:53 +03:00
msr cpsr_c, r4 /* Disable IRQs */
Oops, forgot to commit this along with the others... Enable alignment faults on arm32 for both kernel and userland. If COMPAT_15 and EXEC_AOUT are defined, support per-process alignment checking where AFLTs are always enabled when running kernel code and userland ELF binaries, and dynamically disabled/ enabled when switching to/from a.out binaries. This is necessary in order to execute older a.out binaries, where gcc made deliberate use of misaligned loads under certain circumstances.
2003-10-26 00:42:49 +04:00
b .Lirq_ast_loop /* Check for more ASTs */
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
.bss
.align 0
.global _C_LABEL(astpending)
_C_LABEL(astpending):
.word 0
Fiddle with current_intr_depth in assembly code again. Because we have just pushed a frame, we can make some assumptions that the compiler cannot as easily make, and can thus do it slightly more efficiently.
2003-01-03 03:38:16 +03:00
.global _C_LABEL(current_intr_depth)
_C_LABEL(current_intr_depth):
.word 0
Samsung S3C2800 is a CPU with ARM920T core.
2002-11-20 20:52:48 +03:00
/*
* XXX Provide intrnames/intrcnt for legacy code, but
* don't actually use them.
*/
.global _C_LABEL(intrnames), _C_LABEL(eintrnames)
.global _C_LABEL(intrcnt), _C_LABEL(eintrcnt)
_C_LABEL(intrnames):
_C_LABEL(eintrnames):
.global _C_LABEL(intrcnt), _C_LABEL(sintrcnt), _C_LABEL(eintrcnt)
_C_LABEL(intrcnt):
_C_LABEL(eintrcnt):