NetBSD/sys/arch/i386/isa/icu.s

203 lines
5.1 KiB
ArmAsm

/* $NetBSD: icu.s,v 1.59 1999/01/26 14:28:05 christos Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 "opt_inet.h"
#include "opt_atalk.h"
#include "opt_ccitt.h"
#include "opt_iso.h"
#include "opt_ns.h"
#include "opt_vm86.h"
#include <net/netisr.h>
.data
.globl _C_LABEL(imen),_C_LABEL(cpl),_C_LABEL(ipending)
.globl _C_LABEL(astpending),_C_LABEL(netisr)
_C_LABEL(imen):
.long 0xffff # interrupt mask enable (all off)
.text
#if defined(PROF) || defined(GPROF)
.globl _C_LABEL(splhigh), _C_LABEL(splx)
ALIGN_TEXT
_C_LABEL(splhigh):
movl $-1,%eax
xchgl %eax,_C_LABEL(cpl)
ret
ALIGN_TEXT
_C_LABEL(splx):
movl 4(%esp),%eax
movl %eax,_C_LABEL(cpl)
testl %eax,%eax
jnz _C_LABEL(Xspllower)
ret
#endif /* PROF || GPROF */
/*
* Process pending interrupts.
*
* Important registers:
* ebx - cpl
* esi - address to resume loop at
* edi - scratch for Xsoftnet
*/
IDTVEC(spllower)
pushl %ebx
pushl %esi
pushl %edi
movl _C_LABEL(cpl),%ebx # save priority
movl $1f,%esi # address to resume loop at
1: movl %ebx,%eax
notl %eax
andl _C_LABEL(ipending),%eax
jz 2f
bsfl %eax,%eax
btrl %eax,_C_LABEL(ipending)
jnc 1b
jmp *_C_LABEL(Xrecurse)(,%eax,4)
2: popl %edi
popl %esi
popl %ebx
ret
/*
* Handle return from interrupt after device handler finishes.
*
* Important registers:
* ebx - cpl to restore
* esi - address to resume loop at
* edi - scratch for Xsoftnet
*/
IDTVEC(doreti)
popl %ebx # get previous priority
movl %ebx,_C_LABEL(cpl)
movl $1f,%esi # address to resume loop at
1: movl %ebx,%eax
notl %eax
andl _C_LABEL(ipending),%eax
jz 2f
bsfl %eax,%eax # slow, but not worth optimizing
btrl %eax,_C_LABEL(ipending)
jnc 1b # some intr cleared the in-memory bit
jmp *_C_LABEL(Xresume)(,%eax,4)
2: /* Check for ASTs on exit to user mode. */
cli
cmpb $0,_C_LABEL(astpending)
je 3f
testb $SEL_RPL,TF_CS(%esp)
#ifdef VM86
jnz 4f
testl $PSL_VM,TF_EFLAGS(%esp)
#endif
jz 3f
4: movb $0,_C_LABEL(astpending)
sti
/* Pushed T_ASTFLT into tf_trapno on entry. */
call _C_LABEL(trap)
jmp 2b
3: INTRFASTEXIT
/*
* Soft interrupt handlers
*/
IDTVEC(softserial)
movl _C_LABEL(imask) + IPL_SOFTSERIAL * 4,%eax
movl %eax,_C_LABEL(cpl)
#include "com.h"
#if NCOM > 0
call _C_LABEL(comsoft)
#endif
movl %ebx,_C_LABEL(cpl)
jmp %esi
#define DONET(s, c) \
.globl c ;\
testl $(1 << s),%edi ;\
jz 1f ;\
call c ;\
1:
IDTVEC(softnet)
movl _C_LABEL(imask) + IPL_SOFTNET * 4,%eax
movl %eax,_C_LABEL(cpl)
xorl %edi,%edi
xchgl _C_LABEL(netisr),%edi
#ifdef INET
#include "arp.h"
#if NARP > 0
DONET(NETISR_ARP, _C_LABEL(arpintr))
#endif
DONET(NETISR_IP, _C_LABEL(ipintr))
#endif
#ifdef IMP
DONET(NETISR_IMP, _C_LABEL(impintr))
#endif
#ifdef NS
DONET(NETISR_NS, _C_LABEL(nsintr))
#endif
#ifdef ISO
DONET(NETISR_ISO, _C_LABEL(clnlintr))
#endif
#ifdef CCITT
DONET(NETISR_CCITT, _C_LABEL(ccittintr))
#endif
#ifdef NATM
DONET(NETISR_NATM, _C_LABEL(natmintr))
#endif
#ifdef NETATALK
DONET(NETISR_ATALK, _C_LABEL(atintr))
#endif
#include "ppp.h"
#if NPPP > 0
DONET(NETISR_PPP, _C_LABEL(pppintr))
#endif
movl %ebx,_C_LABEL(cpl)
jmp %esi
IDTVEC(softclock)
movl _C_LABEL(imask) + IPL_SOFTCLOCK * 4,%eax
movl %eax,_C_LABEL(cpl)
call _C_LABEL(softclock)
movl %ebx,_C_LABEL(cpl)
jmp %esi