NetBSD-5.0.2/sys/arch/alpha/pci/pci_kn20aa.c
/* $NetBSD: pci_kn20aa.c,v 1.47 2007/12/03 15:33:08 ad Exp $ */
/*
* Copyright (c) 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: pci_kn20aa.c,v 1.47 2007/12/03 15:33:08 ad Exp $");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/syslog.h>
#include <uvm/uvm_extern.h>
#include <machine/autoconf.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <alpha/pci/ciareg.h>
#include <alpha/pci/ciavar.h>
#include <alpha/pci/pci_kn20aa.h>
#include "sio.h"
#if NSIO > 0 || NPCEB > 0
#include <alpha/pci/siovar.h>
#endif
int dec_kn20aa_intr_map __P((struct pci_attach_args *,
pci_intr_handle_t *));
const char *dec_kn20aa_intr_string __P((void *, pci_intr_handle_t));
const struct evcnt *dec_kn20aa_intr_evcnt __P((void *, pci_intr_handle_t));
void *dec_kn20aa_intr_establish __P((void *, pci_intr_handle_t,
int, int (*func)(void *), void *));
void dec_kn20aa_intr_disestablish __P((void *, void *));
#define KN20AA_PCEB_IRQ 31
#define KN20AA_MAX_IRQ 32
#define PCI_STRAY_MAX 5
struct alpha_shared_intr *kn20aa_pci_intr;
void kn20aa_iointr __P((void *arg, unsigned long vec));
void kn20aa_enable_intr __P((int irq));
void kn20aa_disable_intr __P((int irq));
void
pci_kn20aa_pickintr(ccp)
struct cia_config *ccp;
{
int i;
#if NSIO > 0 || NPCEB > 0
bus_space_tag_t iot = &ccp->cc_iot;
#endif
pci_chipset_tag_t pc = &ccp->cc_pc;
char *cp;
pc->pc_intr_v = ccp;
pc->pc_intr_map = dec_kn20aa_intr_map;
pc->pc_intr_string = dec_kn20aa_intr_string;
pc->pc_intr_evcnt = dec_kn20aa_intr_evcnt;
pc->pc_intr_establish = dec_kn20aa_intr_establish;
pc->pc_intr_disestablish = dec_kn20aa_intr_disestablish;
/* Not supported on KN20AA. */
pc->pc_pciide_compat_intr_establish = NULL;
kn20aa_pci_intr = alpha_shared_intr_alloc(KN20AA_MAX_IRQ, 8);
for (i = 0; i < KN20AA_MAX_IRQ; i++) {
alpha_shared_intr_set_maxstrays(kn20aa_pci_intr, i,
PCI_STRAY_MAX);
cp = alpha_shared_intr_string(kn20aa_pci_intr, i);
sprintf(cp, "irq %d", i);
evcnt_attach_dynamic(alpha_shared_intr_evcnt(
kn20aa_pci_intr, i), EVCNT_TYPE_INTR, NULL,
"kn20aa", cp);
}
#if NSIO > 0 || NPCEB > 0
sio_intr_setup(pc, iot);
kn20aa_enable_intr(KN20AA_PCEB_IRQ);
#endif
}
int
dec_kn20aa_intr_map(pa, ihp)
struct pci_attach_args *pa;
pci_intr_handle_t *ihp;
{
pcitag_t bustag = pa->pa_intrtag;
int buspin = pa->pa_intrpin;
pci_chipset_tag_t pc = pa->pa_pc;
int device;
int kn20aa_irq;
if (buspin == 0) {
/* No IRQ used. */
return 1;
}
if (buspin > 4) {
printf("dec_kn20aa_intr_map: bad interrupt pin %d\n", buspin);
return 1;
}
/*
* Slot->interrupt translation. Appears to work, though it
* may not hold up forever.
*
* The DEC engineers who did this hardware obviously engaged
* in random drug testing.
*/
pci_decompose_tag(pc, bustag, NULL, &device, NULL);
switch (device) {
case 11:
case 12:
kn20aa_irq = ((device - 11) + 0) * 4;
break;
case 7:
kn20aa_irq = 8;
break;
case 9:
kn20aa_irq = 12;
break;
case 6: /* 21040 on AlphaStation 500 */
kn20aa_irq = 13;
break;
case 8:
kn20aa_irq = 16;
break;
default:
printf("dec_kn20aa_intr_map: weird device number %d\n",
device);
return 1;
}
kn20aa_irq += buspin - 1;
if (kn20aa_irq > KN20AA_MAX_IRQ)
panic("dec_kn20aa_intr_map: kn20aa_irq too large (%d)",
kn20aa_irq);
*ihp = kn20aa_irq;
return (0);
}
const char *
dec_kn20aa_intr_string(ccv, ih)
void *ccv;
pci_intr_handle_t ih;
{
#if 0
struct cia_config *ccp = ccv;
#endif
static char irqstr[15]; /* 11 + 2 + NULL + sanity */
if (ih > KN20AA_MAX_IRQ)
panic("dec_kn20aa_intr_string: bogus kn20aa IRQ 0x%lx",
ih);
sprintf(irqstr, "kn20aa irq %ld", ih);
return (irqstr);
}
const struct evcnt *
dec_kn20aa_intr_evcnt(ccv, ih)
void *ccv;
pci_intr_handle_t ih;
{
#if 0
struct cia_config *ccp = ccv;
#endif
if (ih > KN20AA_MAX_IRQ)
panic("dec_kn20aa_intr_string: bogus kn20aa IRQ 0x%lx", ih);
return (alpha_shared_intr_evcnt(kn20aa_pci_intr, ih));
}
void *
dec_kn20aa_intr_establish(ccv, ih, level, func, arg)
void *ccv, *arg;
pci_intr_handle_t ih;
int level;
int (*func) __P((void *));
{
#if 0
struct cia_config *ccp = ccv;
#endif
void *cookie;
if (ih > KN20AA_MAX_IRQ)
panic("dec_kn20aa_intr_establish: bogus kn20aa IRQ 0x%lx",
ih);
cookie = alpha_shared_intr_establish(kn20aa_pci_intr, ih, IST_LEVEL,
level, func, arg, "kn20aa irq");
if (cookie != NULL &&
alpha_shared_intr_firstactive(kn20aa_pci_intr, ih)) {
scb_set(0x900 + SCB_IDXTOVEC(ih), kn20aa_iointr, NULL,
level);
kn20aa_enable_intr(ih);
}
return (cookie);
}
void
dec_kn20aa_intr_disestablish(ccv, cookie)
void *ccv, *cookie;
{
#if 0
struct cia_config *ccp = ccv;
#endif
struct alpha_shared_intrhand *ih = cookie;
unsigned int irq = ih->ih_num;
int s;
s = splhigh();
alpha_shared_intr_disestablish(kn20aa_pci_intr, cookie,
"kn20aa irq");
if (alpha_shared_intr_isactive(kn20aa_pci_intr, irq) == 0) {
kn20aa_disable_intr(irq);
alpha_shared_intr_set_dfltsharetype(kn20aa_pci_intr, irq,
IST_NONE);
scb_free(0x900 + SCB_IDXTOVEC(irq));
}
splx(s);
}
void
kn20aa_iointr(arg, vec)
void *arg;
unsigned long vec;
{
int irq;
irq = SCB_VECTOIDX(vec - 0x900);
if (!alpha_shared_intr_dispatch(kn20aa_pci_intr, irq)) {
alpha_shared_intr_stray(kn20aa_pci_intr, irq,
"kn20aa irq");
if (ALPHA_SHARED_INTR_DISABLE(kn20aa_pci_intr, irq))
kn20aa_disable_intr(irq);
} else
alpha_shared_intr_reset_strays(kn20aa_pci_intr, irq);
}
void
kn20aa_enable_intr(irq)
int irq;
{
/*
* From disassembling small bits of the OSF/1 kernel:
* the following appears to enable a given interrupt request.
* "blech." I'd give valuable body parts for better docs or
* for a good decompiler.
*/
alpha_mb();
REGVAL(0x8780000000L + 0x40L) |= (1 << irq); /* XXX */
alpha_mb();
}
void
kn20aa_disable_intr(irq)
int irq;
{
alpha_mb();
REGVAL(0x8780000000L + 0x40L) &= ~(1 << irq); /* XXX */
alpha_mb();
}