[unix-history] / usr / src / sys.386bsd / i386 / isa / icu.s

/*-
 * 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.
 *
 *	@(#)icu.s	7.2 (Berkeley) 5/21/91
 *
 * PATCHES MAGIC                LEVEL   PATCH THAT GOT US HERE
 * --------------------         -----   ----------------------
 * CURRENT PATCH LEVEL:         2       00117
 * --------------------         -----   ----------------------
 * 
 * 28 Nov 92	Frank MacLachlan	Aligned addresses and data
 *					on 32bit boundaries.
 * 24 Mar 93	Rodney W. Grimes	Added interrupt counters for vmstat
 *					also stray and false intr counters added
 */

/*
 * AT/386
 * Vector interrupt control section
 */

	.data
	ALIGN32
	.globl	_imen
	.globl	_cpl
_cpl:	.long	0xffff			# current priority level (all off)
_imen:	.long	0xffff			# interrupt mask enable (all off)
	.globl	_highmask
_highmask:	.long	0xffff
	.globl	_ttymask
_ttymask:	.long	0
	.globl	_biomask
_biomask:	.long	0
	.globl	_netmask
_netmask:	.long	0
	.globl	_isa_intr
	/*
	 * This is the names of the counters for vmstat added by
	 * rgrimes@agora.rain.com (Rodney W. Grimes) 10/30/1992
	 * Added false and stray counters 3/25/1993 rgrimes
	 */
	.globl	_intrcnt, _eintrcnt	/* Added to make vmstat happy */
	.globl	_isa_false7_intrcnt, _isa_false15_intrcnt, _isa_stray_intrcnt
_intrcnt:				/* Added to make vmstat happy */
_isa_false7_intrcnt:
		.space	4		/* false IRQ7's */
_isa_false15_intrcnt:
		.space	4		/* false IRQ15's */
_isa_stray_intrcnt:
		.space	4		/* stray interrupts */
_isa_intr:	.space	16*4
_eintrcnt:				/* Added to make vmstat happy */

	.text
/*
 * Handle return from interrupt after device handler finishes
 */
	ALIGN32
doreti:
	cli
	popl	%ebx			# remove intr number
	NOP
	popl	%eax			# get previous priority
	# now interrupt frame is a trap frame!
	movw	%ax,%cx
	movw	%ax,_cpl
	orw	_imen,%ax
	outb	%al,$ IO_ICU1+1		# re-enable intr?
	NOP
	movb	%ah,%al
	outb	%al,$ IO_ICU2+1
	NOP

	cmpw	$0x1f,13*4(%esp)	# to user?
	je	1f			# nope, leave
	andw	$0xffff,%cx	
	cmpw	$0,%cx			# returning to zero?
	je	1f

	pop	%es			# nope, going to non-zero level
	pop	%ds
	popa
	addl	$8,%esp
	iret

	ALIGN32
1:	cmpl	$0,_netisr		# check for softint s/traps
	jne	1f
	cmpl	$0,_want_resched
	jne	1f

	pop	%es			# none, going back to base pri
	pop	%ds
	popa
	addl	$8,%esp
	iret
	
#include "../net/netisr.h"

	ALIGN32
1:

#define DONET(s, c)	; \
	.globl	c ;  \
	btrl	$ s ,_netisr ;  \
	jnb	1f ; \
	call	c ; \
1:

	call	_splnet

	DONET(NETISR_RAW,_rawintr)
#ifdef INET
	DONET(NETISR_IP,_ipintr)
#endif
#ifdef IMP
	DONET(NETISR_IMP,_impintr)
#endif
#ifdef NS
	DONET(NETISR_NS,_nsintr)
#endif

#ifdef notdef
	NOP
	popl	%eax
	movw	%ax,_cpl
	orw	_imen,%ax
	outb	%al,$ IO_ICU1+1		# re-enable intr?
	NOP
	movb	%ah,%al
	outb	%al,$ IO_ICU2+1
	NOP
#else
	call	_spl0
#endif

	btrl	$ NETISR_SCLK,_netisr
	jnb	1f
	# back to an interrupt frame for a moment
	call	_splsoftclock
	pushl	$0xff	# dummy intr
	call	_softclock
	popl	%eax
	call	_spl0

	# jmp	2f

1:
	cmpw	$0x1f,13*4(%esp)	# to user?
	jne	2f			# nope, leave
	cmpl	$0,_want_resched
	je	2f
	call	_trap

2:	pop	%es
	pop	%ds
	popal
	addl	$8,%esp
	iret

/*
 * Interrupt priority mechanism
 *
 * Two flavors	-- imlXX masks relative to ISA noemenclature (for PC compat sw)
 *		-- splXX masks with group mechanism for BSD purposes
 */

	.globl	_splhigh
	.globl	_splclock
	ALIGN32
_splhigh:
_splclock:
	cli				# disable interrupts
	NOP
	movw	$0xffff,%ax		# set new priority level
	movw	%ax,%dx
	# orw	_imen,%ax		# mask off those not enabled yet
	movw	%ax,%cx
	outb	%al,$ IO_ICU1+1		/* update icu's */
	NOP
	movb	%ah,%al
	outb	%al,$ IO_ICU2+1
	NOP
	movzwl	_cpl,%eax		# return old priority
	movw	%dx,_cpl		# set new priority level
	sti				# enable interrupts
	ret

	.globl	_spltty			# block clists
	ALIGN32
_spltty:
	cli				# disable interrupts
	NOP
	movw	_cpl,%ax
	orw	_ttymask,%ax
	movw	%ax,%dx
	orw	_imen,%ax		# mask off those not enabled yet
	movw	%ax,%cx
	outb	%al,$ IO_ICU1+1		/* update icu's */
	NOP
	movb	%ah,%al
	outb	%al,$ IO_ICU2+1
	NOP
	movzwl	_cpl,%eax		# return old priority
	movw	%dx,_cpl		# set new priority level
	sti				# enable interrupts
	ret

	.globl	_splimp
	.globl	_splnet
	ALIGN32
_splimp:
_splnet:
	cli				# disable interrupts
	NOP
	movw	_cpl,%ax
	orw	_netmask,%ax
	movw	%ax,%dx
	orw	_imen,%ax		# mask off those not enabled yet
	movw	%ax,%cx
	outb	%al,$ IO_ICU1+1		/* update icu's */
	NOP
	movb	%ah,%al
	outb	%al,$ IO_ICU2+1
	NOP
	movzwl	_cpl,%eax		# return old priority
	movw	%dx,_cpl		# set new priority level
	sti				# enable interrupts
	ret

	.globl	_splbio	
	ALIGN32
_splbio:
	cli				# disable interrupts
	NOP
	movw	_cpl,%ax
	orw	_biomask,%ax
	movw	%ax,%dx
	orw	_imen,%ax		# mask off those not enabled yet
	movw	%ax,%cx
	outb	%al,$ IO_ICU1+1		/* update icu's */
	NOP
	movb	%ah,%al
	outb	%al,$ IO_ICU2+1
	NOP
	movzwl	_cpl,%eax		# return old priority
	movw	%dx,_cpl		# set new priority level
	sti				# enable interrupts
	ret

	.globl	_splsoftclock
	ALIGN32
_splsoftclock:
	cli				# disable interrupts
	NOP
	movw	_cpl,%ax
	orw	$0x8000,%ax		# set new priority level
	movw	%ax,%dx
	orw	_imen,%ax		# mask off those not enabled yet
	movw	%ax,%cx
	outb	%al,$ IO_ICU1+1		/* update icu's */
	NOP
	movb	%ah,%al
	outb	%al,$ IO_ICU2+1
	NOP
	movzwl	_cpl,%eax		# return old priority
	movw	%dx,_cpl		# set new priority level
	sti				# enable interrupts
	ret

	.globl _splnone
	.globl _spl0
	ALIGN32
_splnone:
_spl0:
	cli				# disable interrupts
	NOP
	pushl	_cpl			# save old priority
	movw	_cpl,%ax
	orw	_netmask,%ax		# mask off those network devices
	movw	%ax,_cpl		# set new priority level
	orw	_imen,%ax		# mask off those not enabled yet
	outb	%al,$ IO_ICU1+1		/* update icu's */
	NOP
	movb	%ah,%al
	outb	%al,$ IO_ICU2+1
	NOP
	sti				# enable interrupts

	DONET(NETISR_RAW,_rawintr)
#ifdef INET
	DONET(NETISR_IP,_ipintr)
#endif
	cli				# disable interrupts
	popl	_cpl			# save old priority
	NOP
	movw	$0,%ax			# set new priority level
	movw	%ax,%dx
	orw	_imen,%ax		# mask off those not enabled yet
	movw	%ax,%cx
	outb	%al,$ IO_ICU1+1		/* update icu's */
	NOP
	movb	%ah,%al
	outb	%al,$ IO_ICU2+1
	NOP
	movzwl	_cpl,%eax		# return old priority
	movw	%dx,_cpl		# set new priority level
	sti				# enable interrupts
	ret

	.globl _splx
	ALIGN32
_splx:
	cli				# disable interrupts
	NOP
	movw	4(%esp),%ax		# new priority level
	movw	%ax,%dx
	cmpw	$0,%dx
	je	_spl0			# going to "zero level" is special

	orw	_imen,%ax		# mask off those not enabled yet
	movw	%ax,%cx
	outb	%al,$ IO_ICU1+1		/* update icu's */
	NOP
	movb	%ah,%al
	outb	%al,$ IO_ICU2+1
	NOP
	movzwl	_cpl,%eax		# return old priority
	movw	%dx,_cpl		# set new priority level
	sti				# enable interrupts
	ret

	/* hardware interrupt catcher (IDT 32 - 47) */
	.globl	_isa_strayintr

IDTVEC(intr0)
	INTRSTRAY(0, _highmask, 0) ; call	_isa_strayintr ; INTREXIT1

IDTVEC(intr1)
	INTRSTRAY(1, _highmask, 1) ; call	_isa_strayintr ; INTREXIT1

IDTVEC(intr2)
	INTRSTRAY(2, _highmask, 2) ; call	_isa_strayintr ; INTREXIT1

IDTVEC(intr3)
	INTRSTRAY(3, _highmask, 3) ; call	_isa_strayintr ; INTREXIT1

IDTVEC(intr4)
	INTRSTRAY(4, _highmask, 4) ; call	_isa_strayintr ; INTREXIT1

IDTVEC(intr5)
	INTRSTRAY(5, _highmask, 5) ; call	_isa_strayintr ; INTREXIT1

IDTVEC(intr6)
	INTRSTRAY(6, _highmask, 6) ; call	_isa_strayintr ; INTREXIT1

IDTVEC(intr7)
	INTRSTRAY(7, _highmask, 7) ; call	_isa_strayintr ; INTREXIT1


IDTVEC(intr8)
	INTRSTRAY(8, _highmask, 8) ; call	_isa_strayintr ; INTREXIT2

IDTVEC(intr9)
	INTRSTRAY(9, _highmask, 9) ; call	_isa_strayintr ; INTREXIT2

IDTVEC(intr10)
	INTRSTRAY(10, _highmask, 10) ; call	_isa_strayintr ; INTREXIT2

IDTVEC(intr11)
	INTRSTRAY(11, _highmask, 11) ; call	_isa_strayintr ; INTREXIT2

IDTVEC(intr12)
	INTRSTRAY(12, _highmask, 12) ; call	_isa_strayintr ; INTREXIT2

IDTVEC(intr13)
	INTRSTRAY(13, _highmask, 13) ; call	_isa_strayintr ; INTREXIT2

IDTVEC(intr14)
	INTRSTRAY(14, _highmask, 14) ; call	_isa_strayintr ; INTREXIT2

IDTVEC(intr15)
	INTRSTRAY(15, _highmask, 15) ; call	_isa_strayintr ; INTREXIT2

IDTVEC(intrdefault)
	INTRSTRAY(255, _highmask, 255) ; call	_isa_strayintr ; INTREXIT2
Commit	Line	Data
e637a509 WJ	1	/*-
	2	* Copyright (c) 1989, 1990 William F. Jolitz.
	3	* Copyright (c) 1990 The Regents of the University of California.
	4	* All rights reserved.
	5	*
	6	* This code is derived from software contributed to Berkeley by
	7	* William Jolitz.
	8	*
	9	* Redistribution and use in source and binary forms, with or without
	10	* modification, are permitted provided that the following conditions
	11	* are met:
	12	* 1. Redistributions of source code must retain the above copyright
	13	* notice, this list of conditions and the following disclaimer.
	14	* 2. Redistributions in binary form must reproduce the above copyright
	15	* notice, this list of conditions and the following disclaimer in the
	16	* documentation and/or other materials provided with the distribution.
	17	* 3. All advertising materials mentioning features or use of this software
	18	* must display the following acknowledgement:
	19	* This product includes software developed by the University of
	20	* California, Berkeley and its contributors.
	21	* 4. Neither the name of the University nor the names of its contributors
	22	* may be used to endorse or promote products derived from this software
	23	* without specific prior written permission.
	24	*
	25	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	26	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	27	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	28	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	29	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	30	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	31	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	32	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	33	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	34	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	35	* SUCH DAMAGE.
	36	*
	37	* @(#)icu.s 7.2 (Berkeley) 5/21/91
6d829b69 FM	38	*
	39	* PATCHES MAGIC LEVEL PATCH THAT GOT US HERE
	40	* -------------------- ----- ----------------------
6b9305fd	41	* CURRENT PATCH LEVEL: 2 00117
6d829b69 FM	42	* -------------------- ----- ----------------------
	43	*
	44	* 28 Nov 92 Frank MacLachlan Aligned addresses and data
	45	* on 32bit boundaries.
6b9305fd PS	46	* 24 Mar 93 Rodney W. Grimes Added interrupt counters for vmstat
6b9305fd PS	47	* also stray and false intr counters added
e637a509 WJ	48	*/
	49
	50	/*
	51	* AT/386
	52	* Vector interrupt control section
	53	*/
	54
	55	.data
6d829b69	56	ALIGN32
e637a509 WJ	57	.globl _imen
	58	.globl _cpl
	59	_cpl: .long 0xffff # current priority level (all off)
	60	_imen: .long 0xffff # interrupt mask enable (all off)
	61	.globl _highmask
	62	_highmask: .long 0xffff
	63	.globl _ttymask
	64	_ttymask: .long 0
	65	.globl _biomask
	66	_biomask: .long 0
	67	.globl _netmask
	68	_netmask: .long 0
	69	.globl _isa_intr
6b9305fd PS	70	/*
	71	* This is the names of the counters for vmstat added by
	72	* rgrimes@agora.rain.com (Rodney W. Grimes) 10/30/1992
	73	* Added false and stray counters 3/25/1993 rgrimes
	74	*/
	75	.globl _intrcnt, _eintrcnt /* Added to make vmstat happy */
	76	.globl _isa_false7_intrcnt, _isa_false15_intrcnt, _isa_stray_intrcnt
	77	_intrcnt: /* Added to make vmstat happy */
	78	_isa_false7_intrcnt:
	79	.space 4 /* false IRQ7's */
	80	_isa_false15_intrcnt:
	81	.space 4 /* false IRQ15's */
	82	_isa_stray_intrcnt:
	83	.space 4 /* stray interrupts */
e637a509	84	_isa_intr: .space 16*4
6b9305fd	85	_eintrcnt: /* Added to make vmstat happy */
e637a509 WJ	86
	87	.text
	88	/*
	89	* Handle return from interrupt after device handler finishes
	90	*/
6d829b69	91	ALIGN32
e637a509 WJ	92	doreti:
	93	cli
	94	popl %ebx # remove intr number
	95	NOP
	96	popl %eax # get previous priority
	97	# now interrupt frame is a trap frame!
	98	movw %ax,%cx
	99	movw %ax,_cpl
	100	orw _imen,%ax
	101	outb %al,$ IO_ICU1+1 # re-enable intr?
	102	NOP
	103	movb %ah,%al
	104	outb %al,$ IO_ICU2+1
	105	NOP
	106
	107	cmpw $0x1f,13*4(%esp) # to user?
	108	je 1f # nope, leave
	109	andw $0xffff,%cx
	110	cmpw $0,%cx # returning to zero?
	111	je 1f
	112
	113	pop %es # nope, going to non-zero level
	114	pop %ds
	115	popa
	116	addl $8,%esp
	117	iret
	118
6d829b69	119	ALIGN32
e637a509 WJ	120	1: cmpl $0,_netisr # check for softint s/traps
	121	jne 1f
	122	cmpl $0,_want_resched
	123	jne 1f
	124
	125	pop %es # none, going back to base pri
	126	pop %ds
	127	popa
	128	addl $8,%esp
	129	iret
	130
	131	#include "../net/netisr.h"
	132
6d829b69	133	ALIGN32
e637a509 WJ	134	1:
	135
	136	#define DONET(s, c) ; \
	137	.globl c ; \
	138	btrl $ s ,_netisr ; \
	139	jnb 1f ; \
	140	call c ; \
	141	1:
	142
	143	call _splnet
	144
	145	DONET(NETISR_RAW,_rawintr)
	146	#ifdef INET
	147	DONET(NETISR_IP,_ipintr)
	148	#endif
	149	#ifdef IMP
	150	DONET(NETISR_IMP,_impintr)
	151	#endif
	152	#ifdef NS
	153	DONET(NETISR_NS,_nsintr)
	154	#endif
	155
	156	#ifdef notdef
	157	NOP
	158	popl %eax
	159	movw %ax,_cpl
	160	orw _imen,%ax
	161	outb %al,$ IO_ICU1+1 # re-enable intr?
	162	NOP
	163	movb %ah,%al
	164	outb %al,$ IO_ICU2+1
	165	NOP
	166	#else
	167	call _spl0
	168	#endif
	169
	170	btrl $ NETISR_SCLK,_netisr
	171	jnb 1f
	172	# back to an interrupt frame for a moment
	173	call _splsoftclock
	174	pushl $0xff # dummy intr
	175	call _softclock
	176	popl %eax
	177	call _spl0
	178
	179	# jmp 2f
	180
	181	1:
	182	cmpw $0x1f,13*4(%esp) # to user?
	183	jne 2f # nope, leave
	184	cmpl $0,_want_resched
	185	je 2f
	186	call _trap
	187
	188	2: pop %es
	189	pop %ds
	190	popal
	191	addl $8,%esp
	192	iret
	193
	194	/*
	195	* Interrupt priority mechanism
	196	*
	197	* Two flavors -- imlXX masks relative to ISA noemenclature (for PC compat sw)
198	* -- splXX masks with group mechanism for BSD purposes
199	*/
200
201	.globl _splhigh
202	.globl _splclock
6d829b69	203	ALIGN32
e637a509 WJ	204	_splhigh:
	205	_splclock:
	206	cli # disable interrupts
	207	NOP
	208	movw $0xffff,%ax # set new priority level
	209	movw %ax,%dx
	210	# orw _imen,%ax # mask off those not enabled yet
	211	movw %ax,%cx
	212	outb %al,$ IO_ICU1+1 /* update icu's */
	213	NOP
	214	movb %ah,%al
	215	outb %al,$ IO_ICU2+1
	216	NOP
	217	movzwl _cpl,%eax # return old priority
	218	movw %dx,_cpl # set new priority level
	219	sti # enable interrupts
	220	ret
	221
	222	.globl _spltty # block clists
6d829b69	223	ALIGN32
e637a509 WJ	224	_spltty:
	225	cli # disable interrupts
	226	NOP
	227	movw _cpl,%ax
	228	orw _ttymask,%ax
	229	movw %ax,%dx
	230	orw _imen,%ax # mask off those not enabled yet
	231	movw %ax,%cx
	232	outb %al,$ IO_ICU1+1 /* update icu's */
	233	NOP
	234	movb %ah,%al
	235	outb %al,$ IO_ICU2+1
	236	NOP
	237	movzwl _cpl,%eax # return old priority
	238	movw %dx,_cpl # set new priority level
	239	sti # enable interrupts
	240	ret
	241
	242	.globl _splimp
	243	.globl _splnet
6d829b69	244	ALIGN32
e637a509 WJ	245	_splimp:
	246	_splnet:
	247	cli # disable interrupts
	248	NOP
	249	movw _cpl,%ax
	250	orw _netmask,%ax
	251	movw %ax,%dx
	252	orw _imen,%ax # mask off those not enabled yet
	253	movw %ax,%cx
	254	outb %al,$ IO_ICU1+1 /* update icu's */
	255	NOP
	256	movb %ah,%al
	257	outb %al,$ IO_ICU2+1
	258	NOP
	259	movzwl _cpl,%eax # return old priority
	260	movw %dx,_cpl # set new priority level
	261	sti # enable interrupts
	262	ret
	263
	264	.globl _splbio
6d829b69	265	ALIGN32
e637a509 WJ	266	_splbio:
	267	cli # disable interrupts
	268	NOP
	269	movw _cpl,%ax
	270	orw _biomask,%ax
	271	movw %ax,%dx
	272	orw _imen,%ax # mask off those not enabled yet
	273	movw %ax,%cx
	274	outb %al,$ IO_ICU1+1 /* update icu's */
	275	NOP
	276	movb %ah,%al
	277	outb %al,$ IO_ICU2+1
	278	NOP
	279	movzwl _cpl,%eax # return old priority
	280	movw %dx,_cpl # set new priority level
	281	sti # enable interrupts
	282	ret
	283
	284	.globl _splsoftclock
6d829b69	285	ALIGN32
e637a509 WJ	286	_splsoftclock:
	287	cli # disable interrupts
	288	NOP
	289	movw _cpl,%ax
	290	orw $0x8000,%ax # set new priority level
	291	movw %ax,%dx
	292	orw _imen,%ax # mask off those not enabled yet
	293	movw %ax,%cx
	294	outb %al,$ IO_ICU1+1 /* update icu's */
	295	NOP
	296	movb %ah,%al
	297	outb %al,$ IO_ICU2+1
	298	NOP
	299	movzwl _cpl,%eax # return old priority
	300	movw %dx,_cpl # set new priority level
	301	sti # enable interrupts
	302	ret
	303
	304	.globl _splnone
	305	.globl _spl0
6d829b69	306	ALIGN32
e637a509 WJ	307	_splnone:
	308	_spl0:
	309	cli # disable interrupts
	310	NOP
	311	pushl _cpl # save old priority
	312	movw _cpl,%ax
	313	orw _netmask,%ax # mask off those network devices
	314	movw %ax,_cpl # set new priority level
	315	orw _imen,%ax # mask off those not enabled yet
	316	outb %al,$ IO_ICU1+1 /* update icu's */
	317	NOP
	318	movb %ah,%al
	319	outb %al,$ IO_ICU2+1
	320	NOP
	321	sti # enable interrupts
	322
	323	DONET(NETISR_RAW,_rawintr)
	324	#ifdef INET
	325	DONET(NETISR_IP,_ipintr)
	326	#endif
	327	cli # disable interrupts
	328	popl _cpl # save old priority
	329	NOP
	330	movw $0,%ax # set new priority level
	331	movw %ax,%dx
	332	orw _imen,%ax # mask off those not enabled yet
	333	movw %ax,%cx
	334	outb %al,$ IO_ICU1+1 /* update icu's */
	335	NOP
	336	movb %ah,%al
	337	outb %al,$ IO_ICU2+1
	338	NOP
	339	movzwl _cpl,%eax # return old priority
	340	movw %dx,_cpl # set new priority level
	341	sti # enable interrupts
	342	ret
	343
	344	.globl _splx
6d829b69	345	ALIGN32
e637a509 WJ	346	_splx:
	347	cli # disable interrupts
	348	NOP
	349	movw 4(%esp),%ax # new priority level
	350	movw %ax,%dx
	351	cmpw $0,%dx
	352	je _spl0 # going to "zero level" is special
	353
	354	orw _imen,%ax # mask off those not enabled yet
	355	movw %ax,%cx
	356	outb %al,$ IO_ICU1+1 /* update icu's */
	357	NOP
	358	movb %ah,%al
	359	outb %al,$ IO_ICU2+1
	360	NOP
	361	movzwl _cpl,%eax # return old priority
	362	movw %dx,_cpl # set new priority level
	363	sti # enable interrupts
	364	ret
	365
	366	/* hardware interrupt catcher (IDT 32 - 47) */
	367	.globl _isa_strayintr
	368
	369	IDTVEC(intr0)
	370	INTRSTRAY(0, _highmask, 0) ; call _isa_strayintr ; INTREXIT1
	371
	372	IDTVEC(intr1)
	373	INTRSTRAY(1, _highmask, 1) ; call _isa_strayintr ; INTREXIT1
	374
	375	IDTVEC(intr2)
	376	INTRSTRAY(2, _highmask, 2) ; call _isa_strayintr ; INTREXIT1
	377
	378	IDTVEC(intr3)
	379	INTRSTRAY(3, _highmask, 3) ; call _isa_strayintr ; INTREXIT1
	380
	381	IDTVEC(intr4)
	382	INTRSTRAY(4, _highmask, 4) ; call _isa_strayintr ; INTREXIT1
	383
	384	IDTVEC(intr5)
	385	INTRSTRAY(5, _highmask, 5) ; call _isa_strayintr ; INTREXIT1
	386
	387	IDTVEC(intr6)
	388	INTRSTRAY(6, _highmask, 6) ; call _isa_strayintr ; INTREXIT1
	389
	390	IDTVEC(intr7)
	391	INTRSTRAY(7, _highmask, 7) ; call _isa_strayintr ; INTREXIT1
	392
	393
	394	IDTVEC(intr8)
	395	INTRSTRAY(8, _highmask, 8) ; call _isa_strayintr ; INTREXIT2
	396
	397	IDTVEC(intr9)
	398	INTRSTRAY(9, _highmask, 9) ; call _isa_strayintr ; INTREXIT2
	399
	400	IDTVEC(intr10)
	401	INTRSTRAY(10, _highmask, 10) ; call _isa_strayintr ; INTREXIT2
	402
	403	IDTVEC(intr11)
	404	INTRSTRAY(11, _highmask, 11) ; call _isa_strayintr ; INTREXIT2
	405
	406	IDTVEC(intr12)
	407	INTRSTRAY(12, _highmask, 12) ; call _isa_strayintr ; INTREXIT2
	408
	409	IDTVEC(intr13)
410	INTRSTRAY(13, _highmask, 13) ; call _isa_strayintr ; INTREXIT2
411
412	IDTVEC(intr14)
413	INTRSTRAY(14, _highmask, 14) ; call _isa_strayintr ; INTREXIT2
414
415	IDTVEC(intr15)
416	INTRSTRAY(15, _highmask, 15) ; call _isa_strayintr ; INTREXIT2
417
418	IDTVEC(intrdefault)
419	INTRSTRAY(255, _highmask, 255) ; call _isa_strayintr ; INTREXIT2