xref: /netbsd/sys/arch/alpha/pci/pci_eb66_intr.s (revision bf9ec67e)
1/* $NetBSD: pci_eb66_intr.s,v 1.1 1998/06/27 10:10:51 thorpej Exp $ */
2
3/*
4 * Copyright (c) 1996 Carnegie-Mellon University.
5 * All rights reserved.
6 *
7 * Author: Chris G. Demetriou
8 *
9 * Permission to use, copy, modify and distribute this software and
10 * its documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation.
14 *
15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 *
19 * Carnegie Mellon requests users of this software to return to
20 *
21 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
22 *  School of Computer Science
23 *  Carnegie Mellon University
24 *  Pittsburgh PA 15213-3890
25 *
26 * any improvements or extensions that they make and grant Carnegie the
27 * rights to redistribute these changes.
28 */
29
30/*
31 * This file hacked from pci_eb164_intr.s
32 *
33 * These functions were written by disassembling a Digital UNIX kernel's
34 * eb66_intrdsabl and eb66_intrenabl functions (because they had
35 * interesting names, and looked like the eb164 versions which were
36 * known to already work), and then playing with them to see how to call
37 * them correctly.
38 *
39 * It looks like the right thing to do is to call them with the interrupt
40 * request that you want to enable or disable (presumably in the range
41 * 0 -> 23, since there are 3 8-bit interrupt-enable bits in the
42 * interrupt mask PLD).
43 */
44
45#include <machine/asm.h>
46
47__KERNEL_RCSID(0, "$NetBSD: pci_eb66_intr.s,v 1.1 1998/06/27 10:10:51 thorpej Exp $");
48
49	.text
50LEAF(eb66_intr_enable,1)
51	mov	a0, a1
52	ldiq	a0, 0x34
53	call_pal PAL_cserve
54	RET
55	END(eb66_intr_enable)
56
57	.text
58LEAF(eb66_intr_disable,1)
59	mov	a0, a1
60	ldiq	a0, 0x35
61	call_pal PAL_cserve
62	RET
63	END(eb66_intr_enable)
64