Annotation of sys/arch/alpha/pci/pci_eb164_intr.s, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: pci_eb164_intr.s,v 1.3 2002/08/15 17:01:38 deraadt Exp $ */
2: /* $NetBSD: pci_eb164_intr.s,v 1.1 1996/11/25 03:47:07 cgd Exp $ */
3:
4: /*
5: * Copyright (c) 1996 Carnegie-Mellon University.
6: * All rights reserved.
7: *
8: * Author: Chris G. Demetriou
9: *
10: * Permission to use, copy, modify and distribute this software and
11: * its documentation is hereby granted, provided that both the copyright
12: * notice and this permission notice appear in all copies of the
13: * software, derivative works or modified versions, and any portions
14: * thereof, and that both notices appear in supporting documentation.
15: *
16: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
17: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
18: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
19: *
20: * Carnegie Mellon requests users of this software to return to
21: *
22: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
23: * School of Computer Science
24: * Carnegie Mellon University
25: * Pittsburgh PA 15213-3890
26: *
27: * any improvements or extensions that they make and grant Carnegie the
28: * rights to redistribute these changes.
29: */
30:
31: /*
32: * The description of how to enable and disable interrupts in the
33: * AlphaPC 164 motherboard technical reference manual is incorrect,
34: * at least for the OSF/1 PALcode.
35: *
36: * These functions were written by disassembling a Digital UNIX kernel's
37: * eb164_intrdsabl and eb164_intrenabl functions (because they had
38: * interesting names), and then playing with them to see how to call
39: * them correctly.
40: *
41: * It looks like the right thing to do is to call them with the interrupt
42: * request that you want to enable or disable (presumably in the range
43: * 0 -> 23, since there are 3 8-bit interrupt-enable bits in the
44: * interrupt mask PLD).
45: */
46:
47: #include <machine/asm.h>
48:
49: .text
50: LEAF(eb164_intr_enable,1)
51: mov a0, a1
52: ldiq a0, 0x34
53: call_pal PAL_cserve
54: RET
55: END(eb164_intr_enable)
56:
57: .text
58: LEAF(eb164_intr_disable,1)
59: mov a0, a1
60: ldiq a0, 0x35
61: call_pal PAL_cserve
62: RET
63: END(eb164_intr_disable)
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