2 * Copyright (c) 2003,2004,2008 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * Copyright (c) 1997, by Steve Passe, All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. The name of the developer may NOT be used to endorse or promote products
42 * derived from this software without specific prior written permission.
44 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
45 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
47 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
48 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
49 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
50 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
52 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
53 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56 * $FreeBSD: src/sys/i386/isa/apic_ipl.s,v 1.27.2.2 2000/09/30 02:49:35 ps Exp $
59 #include <machine/asmacros.h>
60 #include <machine/segments.h>
61 #include <machine/lock.h>
62 #include <machine/psl.h>
63 #include <machine/trap.h>
69 #ifdef SMP /* APIC-IO */
75 * Functions to enable and disable a hardware interrupt. The
76 * IRQ number is passed as an argument.
79 APIC_IMASK_LOCK
/* enter critical reg */
82 imull $AIMI_SIZE
, %eax
83 orl $AIMI_FLAG_MASKED
, CNAME
(int_to_apicintpin
) + AIMI_FLAGS
(%rax
)
84 movq CNAME
(int_to_apicintpin
) + AIMI_APIC_ADDRESS
(%rax
), %rdx
85 movl CNAME
(int_to_apicintpin
) + AIMI_REDIRINDEX
(%rax
), %ecx
88 movl
%ecx
, (%rdx
) /* target register index */
89 orl $IOART_INTMASK
, IOAPIC_WINDOW
(%rdx
)
90 /* set intmask in target apic reg */
92 APIC_IMASK_UNLOCK
/* exit critical reg */
96 APIC_IMASK_LOCK
/* enter critical reg */
99 imull $AIMI_SIZE
, %eax
100 andl $~AIMI_FLAG_MASKED
, CNAME
(int_to_apicintpin
) + AIMI_FLAGS
(%rax
)
101 movq CNAME
(int_to_apicintpin
) + AIMI_APIC_ADDRESS
(%rax
), %rdx
102 movl CNAME
(int_to_apicintpin
) + AIMI_REDIRINDEX
(%rax
), %ecx
105 movl
%ecx
, (%rdx
) /* write the target register index */
106 andl $~IOART_INTMASK
, IOAPIC_WINDOW
(%rdx
)
109 APIC_IMASK_UNLOCK
/* exit critical reg */
112 /******************************************************************************
117 * u_int io_apic_read(int apic, int select);
120 movl
%edi
, %ecx
/* APIC # */
122 movq
(%rax
,%rcx
,8), %rdx
/* APIC base register address */
123 movl
%esi
, (%rdx
) /* write the target register index */
124 movl IOAPIC_WINDOW
(%rdx
), %eax
/* read the APIC register data */
125 ret
/* %eax = register value */
128 * void io_apic_write(int apic, int select, u_int value);
131 movl
%edi
, %ecx
/* APIC # */
133 movq
(%rax
,%rcx
,8), %r8 /* APIC base register address */
134 movl
%esi
, (%r8) /* write the target register index */
135 movl
%edx
, IOAPIC_WINDOW
(%r8) /* write the APIC register data */
136 ret
/* %eax = void */