mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-17 10:26:15 +00:00
010e669615
time when icu.s was common between UP and SMP. It is not necessary for UP and thus can be removed from icu_ipl.s.
174 lines
4.9 KiB
ArmAsm
174 lines
4.9 KiB
ArmAsm
/*-
|
|
* Copyright (c) 1989, 1990 William F. Jolitz.
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* William Jolitz.
|
|
*
|
|
* 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 the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS 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.
|
|
*
|
|
* $Id: icu_ipl.s,v 1.2 1997/08/24 00:05:13 fsmp Exp $
|
|
*/
|
|
|
|
.data
|
|
ALIGN_DATA
|
|
vec:
|
|
.long vec0, vec1, vec2, vec3, vec4, vec5, vec6, vec7
|
|
.long vec8, vec9, vec10, vec11, vec12, vec13, vec14, vec15
|
|
|
|
/* interrupt mask enable (all h/w off) */
|
|
.globl _imen
|
|
_imen: .long HWI_MASK
|
|
|
|
|
|
/*
|
|
*
|
|
*/
|
|
.text
|
|
SUPERALIGN_TEXT
|
|
|
|
/*
|
|
* Interrupt priority mechanism
|
|
* -- soft splXX masks with group mechanism (cpl)
|
|
* -- h/w masks for currently active or unused interrupts (imen)
|
|
* -- ipending = active interrupts currently masked by cpl
|
|
*/
|
|
|
|
ENTRY(splz)
|
|
/*
|
|
* The caller has restored cpl and checked that (ipending & ~cpl)
|
|
* is nonzero. We have to repeat the check since if there is an
|
|
* interrupt while we're looking, _doreti processing for the
|
|
* interrupt will handle all the unmasked pending interrupts
|
|
* because we restored early. We're repeating the calculation
|
|
* of (ipending & ~cpl) anyway so that the caller doesn't have
|
|
* to pass it, so this only costs one "jne". "bsfl %ecx,%ecx"
|
|
* is undefined when %ecx is 0 so we can't rely on the secondary
|
|
* btrl tests.
|
|
*/
|
|
movl _cpl,%eax
|
|
splz_next:
|
|
/*
|
|
* We don't need any locking here. (ipending & ~cpl) cannot grow
|
|
* while we're looking at it - any interrupt will shrink it to 0.
|
|
*/
|
|
movl %eax,%ecx
|
|
notl %ecx
|
|
andl _ipending,%ecx
|
|
jne splz_unpend
|
|
ret
|
|
|
|
ALIGN_TEXT
|
|
splz_unpend:
|
|
bsfl %ecx,%ecx
|
|
btrl %ecx,_ipending
|
|
jnc splz_next
|
|
movl ihandlers(,%ecx,4),%edx
|
|
testl %edx,%edx
|
|
je splz_next /* "can't happen" */
|
|
cmpl $NHWI,%ecx
|
|
jae splz_swi
|
|
/*
|
|
* We would prefer to call the intr handler directly here but that
|
|
* doesn't work for badly behaved handlers that want the interrupt
|
|
* frame. Also, there's a problem determining the unit number.
|
|
* We should change the interface so that the unit number is not
|
|
* determined at config time.
|
|
*/
|
|
jmp *vec(,%ecx,4)
|
|
|
|
ALIGN_TEXT
|
|
splz_swi:
|
|
cmpl $SWI_AST,%ecx
|
|
je splz_next /* "can't happen" */
|
|
pushl %eax
|
|
orl imasks(,%ecx,4),%eax
|
|
movl %eax,_cpl
|
|
call %edx
|
|
popl %eax
|
|
movl %eax,_cpl
|
|
jmp splz_next
|
|
|
|
/*
|
|
* Fake clock interrupt(s) so that they appear to come from our caller instead
|
|
* of from here, so that system profiling works.
|
|
* XXX do this more generally (for all vectors; look up the C entry point).
|
|
* XXX frame bogusness stops us from just jumping to the C entry point.
|
|
*/
|
|
ALIGN_TEXT
|
|
vec0:
|
|
popl %eax /* return address */
|
|
pushfl
|
|
pushl $KCSEL
|
|
pushl %eax
|
|
cli
|
|
MEXITCOUNT
|
|
jmp _Xintr0 /* XXX might need _Xfastintr0 */
|
|
|
|
#ifndef PC98
|
|
ALIGN_TEXT
|
|
vec8:
|
|
popl %eax
|
|
pushfl
|
|
pushl $KCSEL
|
|
pushl %eax
|
|
cli
|
|
MEXITCOUNT
|
|
jmp _Xintr8 /* XXX might need _Xfastintr8 */
|
|
#endif /* PC98 */
|
|
|
|
/*
|
|
* The 'generic' vector stubs.
|
|
*/
|
|
|
|
#define BUILD_VEC(irq_num) \
|
|
ALIGN_TEXT ; \
|
|
__CONCAT(vec,irq_num): ; \
|
|
int $ICU_OFFSET + (irq_num) ; \
|
|
ret
|
|
|
|
BUILD_VEC(1)
|
|
BUILD_VEC(2)
|
|
BUILD_VEC(3)
|
|
BUILD_VEC(4)
|
|
BUILD_VEC(5)
|
|
BUILD_VEC(6)
|
|
BUILD_VEC(7)
|
|
#ifdef PC98
|
|
BUILD_VEC(8)
|
|
#endif
|
|
BUILD_VEC(9)
|
|
BUILD_VEC(10)
|
|
BUILD_VEC(11)
|
|
BUILD_VEC(12)
|
|
BUILD_VEC(13)
|
|
BUILD_VEC(14)
|
|
BUILD_VEC(15)
|