sys/arch/alpha/pci/pci_eb66_intr.s

   1 /* $NetBSD: pci_eb66_intr.s,v 1.1.48.2 2004/09/21 13:12:02 skrll 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 1.1.48.2 2004/09/21 13:12:02 skrll Exp $");
  48
  49         .text
  50 LEAF(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
  58 LEAF(eb66_intr_disable,1)
  59         mov     a0, a1
  60         ldiq    a0, 0x35
  61         call_pal PAL_cserve
  62         RET
  63         END(eb66_intr_disable)