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      1  1.7  thorpej /* $NetBSD: pci_eb164_intr.s,v 1.7 2020/09/22 15:24:02 thorpej Exp $ */
      2  1.1      cgd 
      3  1.1      cgd /*
      4  1.1      cgd  * Copyright (c) 1996 Carnegie-Mellon University.
      5  1.1      cgd  * All rights reserved.
      6  1.1      cgd  *
      7  1.1      cgd  * Author: Chris G. Demetriou
      8  1.1      cgd  *
      9  1.1      cgd  * Permission to use, copy, modify and distribute this software and
     10  1.1      cgd  * its documentation is hereby granted, provided that both the copyright
     11  1.1      cgd  * notice and this permission notice appear in all copies of the
     12  1.1      cgd  * software, derivative works or modified versions, and any portions
     13  1.1      cgd  * thereof, and that both notices appear in supporting documentation.
     14  1.1      cgd  *
     15  1.1      cgd  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  1.1      cgd  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     17  1.1      cgd  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  1.1      cgd  *
     19  1.1      cgd  * Carnegie Mellon requests users of this software to return to
     20  1.1      cgd  *
     21  1.1      cgd  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  1.1      cgd  *  School of Computer Science
     23  1.1      cgd  *  Carnegie Mellon University
     24  1.1      cgd  *  Pittsburgh PA 15213-3890
     25  1.1      cgd  *
     26  1.1      cgd  * any improvements or extensions that they make and grant Carnegie the
     27  1.1      cgd  * rights to redistribute these changes.
     28  1.1      cgd  */
     29  1.1      cgd 
     30  1.1      cgd /*
     31  1.1      cgd  * The description of how to enable and disable interrupts in the
     32  1.1      cgd  * AlphaPC 164 motherboard technical reference manual is incorrect,
     33  1.1      cgd  * at least for the OSF/1 PALcode.
     34  1.1      cgd  *
     35  1.1      cgd  * These functions were written by disassembling a Digital UNIX kernel's
     36  1.1      cgd  * eb164_intrdsabl and eb164_intrenabl functions (because they had
     37  1.1      cgd  * interesting names), and then playing with them to see how to call
     38  1.1      cgd  * them correctly.
     39  1.1      cgd  *
     40  1.1      cgd  * It looks like the right thing to do is to call them with the interrupt
     41  1.1      cgd  * request that you want to enable or disable (presumably in the range
     42  1.1      cgd  * 0 -> 23, since there are 3 8-bit interrupt-enable bits in the
     43  1.1      cgd  * interrupt mask PLD).
     44  1.1      cgd  */
     45  1.2      cgd 
     46  1.4      cgd #include <machine/asm.h>
     47  1.1      cgd 
     48  1.7  thorpej __KERNEL_RCSID(0, "$NetBSD: pci_eb164_intr.s,v 1.7 2020/09/22 15:24:02 thorpej Exp $");
     49  1.7  thorpej 
     50  1.7  thorpej /*
     51  1.7  thorpej  * void eb164_intr_enable(pci_chipset_tag_t, int irq);
     52  1.7  thorpej  * void eb164_intr_disenable(pci_chipset_tag_t, int irq);
     53  1.7  thorpej  */
     54  1.1      cgd 
     55  1.1      cgd 	.text
     56  1.7  thorpej LEAF(eb164_intr_enable,2)
     57  1.1      cgd 	ldiq	a0, 0x34
     58  1.1      cgd 	call_pal PAL_cserve
     59  1.1      cgd 	RET
     60  1.1      cgd 	END(eb164_intr_enable)
     61  1.1      cgd 
     62  1.1      cgd 	.text
     63  1.7  thorpej LEAF(eb164_intr_disable,2)
     64  1.1      cgd 	ldiq	a0, 0x35
     65  1.1      cgd 	call_pal PAL_cserve
     66  1.1      cgd 	RET
     67  1.6     ross 	END(eb164_intr_disable)
     68