Implement CIA interrupts.
Obtained from: SRM console magic from NetBSD
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@ -23,7 +23,7 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id$
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* $Id: cia.c,v 1.1 1998/07/05 12:16:14 dfr Exp $
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*/
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#include <sys/param.h>
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@ -35,12 +35,15 @@
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#include <alpha/pci/ciareg.h>
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#include <alpha/pci/ciavar.h>
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#include <machine/bwx.h>
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#include <machine/intr.h>
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#define KV(pa) ALPHA_PHYS_TO_K0SEG(pa)
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static devclass_t cia_devclass;
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static device_t cia0; /* XXX only one for now */
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extern void eb164_intr_enable(int irq);
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extern void eb164_intr_disable(int irq);
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static void cia_intr(void* frame, u_long vector);
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struct cia_softc {
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@ -179,12 +182,18 @@ cia_bwx_cfgwritel(u_int b, u_int s, u_int f, u_int r, u_int32_t data)
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static int cia_probe(device_t dev);
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static int cia_attach(device_t dev);
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static void *cia_create_intr(device_t dev, device_t child, int irq, driver_intr_t *intr, void *arg);
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static int cia_connect_intr(device_t dev, void* ih);
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static device_method_t cia_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, cia_probe),
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DEVMETHOD(device_attach, cia_attach),
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/* Bus interface */
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DEVMETHOD(bus_create_intr, cia_create_intr),
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DEVMETHOD(bus_connect_intr, cia_connect_intr),
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{ 0, 0 }
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};
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@ -226,6 +235,7 @@ cia_attach(device_t dev)
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struct cia_softc* sc = CIA_SOFTC(dev);
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cia_init();
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chipset.bridge = dev;
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sc->dmem_base = CIA_EV56_BWMEM;
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sc->smem_base = CIA_PCI_SMEM1;
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@ -237,9 +247,30 @@ cia_attach(device_t dev)
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return 0;
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}
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static void *
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cia_create_intr(device_t dev, device_t child,
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int irq, driver_intr_t *intr, void *arg)
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{
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int vector = 0x900 + (irq << 4);
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return alpha_create_intr(vector, intr, arg);
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}
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static int
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cia_connect_intr(device_t dev, void* ih)
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{
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struct alpha_intr *i = ih;
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int s = splhigh();
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int error = alpha_connect_intr(i);
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if (!error)
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eb164_intr_enable((i->vector - 0x900) >> 4);
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splx(s);
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return error;
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}
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static void
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cia_intr(void* frame, u_long vector)
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{
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alpha_dispatch_intr(vector);
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}
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DRIVER_MODULE(cia, root, cia_driver, cia_devclass, 0, 0);
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64
sys/alpha/pci/pci_eb164_intr.s
Normal file
64
sys/alpha/pci/pci_eb164_intr.s
Normal file
@ -0,0 +1,64 @@
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/* $NetBSD: pci_eb164_intr.s,v 1.5 1997/09/02 13:19:42 thorpej Exp $ */
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/*
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* Copyright (c) 1996 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/*
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* The description of how to enable and disable interrupts in the
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* AlphaPC 164 motherboard technical reference manual is incorrect,
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* at least for the OSF/1 PALcode.
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*
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* These functions were written by disassembling a Digital UNIX kernel's
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* eb164_intrdsabl and eb164_intrenabl functions (because they had
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* interesting names), and then playing with them to see how to call
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* them correctly.
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*
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* It looks like the right thing to do is to call them with the interrupt
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* request that you want to enable or disable (presumably in the range
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* 0 -> 23, since there are 3 8-bit interrupt-enable bits in the
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* interrupt mask PLD).
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*/
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#include <machine/asm.h>
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__KERNEL_RCSID(0, "$NetBSD: pci_eb164_intr.s,v 1.5 1997/09/02 13:19:42 thorpej Exp $");
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.text
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LEAF(eb164_intr_enable,1)
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mov a0, a1
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ldiq a0, 0x34
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call_pal PAL_cserve
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RET
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END(eb164_intr_enable)
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.text
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LEAF(eb164_intr_disable,1)
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mov a0, a1
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ldiq a0, 0x35
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call_pal PAL_cserve
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RET
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END(eb164_intr_enable)
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