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NetBSD/sys/arch/alpha/pci/pci_a12.c

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/* $NetBSD: pci_a12.c,v 1.4 1998/04/24 01:25:18 mjacob Exp $ */
/* [Notice revision 2.0]
* Copyright (c) 1997, 1998 Avalon Computer Systems, Inc.
* All rights reserved.
*
* Author: Ross Harvey
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright and
* author notice, this list of conditions, and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Avalon Computer Systems, Inc. nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* 4. This copyright will be assigned to The NetBSD Foundation on
* 1/1/2000 unless these terms (including possibly the assignment
* date) are updated in writing by Avalon prior to the latest specified
* assignment date.
*
* THIS SOFTWARE IS PROVIDED BY AVALON COMPUTER SYSTEMS, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "opt_avalon_a12.h" /* Config options headers */
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: pci_a12.c,v 1.4 1998/04/24 01:25:18 mjacob 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 <vm/vm.h>
#include <machine/autoconf.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <alpha/pci/a12creg.h>
#include <alpha/pci/a12cvar.h>
#include <alpha/pci/pci_a12.h>
#ifndef EVCNT_COUNTERS
#include <machine/intrcnt.h>
#endif
#define PCI_A12() /* Generate ctags(1) key */
#define LOADGSR() (REGVAL(A12_GSR) & 0x7fc0)
static int pci_serr __P((void *));
static int a12_xbar_flag __P((void *));
struct a12_intr_vect_t {
int on;
int (*f) __P((void *));
void *a;
} a12_intr_pci = { 0 },
a12_intr_serr = { 1, pci_serr },
a12_intr_flag = { 1, a12_xbar_flag },
a12_intr_iei = { 0 },
a12_intr_dc = { 0 },
a12_intr_xb = { 0 };
static struct gintcall {
char flag;
char needsclear;
char intr_index; /* XXX implicit crossref */
struct a12_intr_vect_t *f;
char *msg;
} gintcall[] = {
{ 6, 0, 2, &a12_intr_pci, "PCI Device" },
{ 7, 1, 3, &a12_intr_serr, "PCI SERR#" },
{ 8, 1, 4, &a12_intr_flag, "XB Frame MCE" },
{ 9, 1, 5, &a12_intr_flag, "XB Frame ECE" },
/* skip 10, gsr.TEI */
{ 11, 1, 6, &a12_intr_iei, "Interval Timer"},
{ 12, 1, 7, &a12_intr_flag, "XB FIFO Overrun"},
{ 13, 1, 8, &a12_intr_flag, "XB FIFO Underrun"},
{ 14, 1, 9, &a12_intr_dc, "DC Control Word"},
{ 0 }
};
#ifdef EVCNT_COUNTERS
struct evcnt a12_intr_evcnt;
#endif
int avalon_a12_intr_map __P((void *, pcitag_t, int, int,
pci_intr_handle_t *));
const char *avalon_a12_intr_string __P((void *, pci_intr_handle_t));
void *avalon_a12_intr_establish __P((void *, pci_intr_handle_t,
int, int (*func)(void *), void *));
void avalon_a12_intr_disestablish __P((void *, void *));
static void clear_gsr_interrupt __P((long));
static void a12_GInt(void);
void a12_iointr __P((void *framep, unsigned long vec));
void
pci_a12_pickintr(ccp)
struct a12c_config *ccp;
{
pci_chipset_tag_t pc = &ccp->ac_pc;
pc->pc_intr_v = ccp;
pc->pc_intr_map = avalon_a12_intr_map;
pc->pc_intr_string = avalon_a12_intr_string;
pc->pc_intr_establish = avalon_a12_intr_establish;
pc->pc_intr_disestablish = avalon_a12_intr_disestablish;
/* Not supported on A12. */
pc->pc_pciide_compat_intr_establish = NULL;
set_iointr(a12_iointr);
}
int
avalon_a12_intr_map(ccv, bustag, buspin, line, ihp)
void *ccv;
pcitag_t bustag;
int buspin, line;
pci_intr_handle_t *ihp;
{
/* only one PCI slot (per CPU, that is, but there are 12 CPU's!) */
*ihp = 0;
return 0;
}
const char *
avalon_a12_intr_string(ccv, ih)
void *ccv;
pci_intr_handle_t ih;
{
return "a12 pci irq"; /* see "only one" note above */
}
void *
avalon_a12_intr_establish(ccv, ih, level, func, arg)
void *ccv, *arg;
pci_intr_handle_t ih;
int level;
int (*func) __P((void *));
{
a12_intr_pci.f = func;
a12_intr_pci.a = arg;
a12_intr_pci.on= 1;
alpha_wmb();
REGVAL(A12_OMR) |= A12_OMR_PCI_ENABLE;
alpha_mb();
return (void *)func;
}
void
avalon_a12_intr_disestablish(ccv, cookie)
void *ccv, *cookie;
{
if(cookie == a12_intr_pci.f) {
alpha_wmb();
REGVAL(A12_OMR) &= ~A12_OMR_PCI_ENABLE;
alpha_mb();
a12_intr_pci.f = 0;
a12_intr_pci.on= 0;
} else What();
}
void a12_intr_register_xb(f)
int (*f) __P((void *));
{
a12_intr_xb.f = f;
a12_intr_xb.on = 1;
}
void a12_intr_register_icw(f)
int (*f) __P((void *));
{
long t;
t = REGVAL(A12_OMR) & ~A12_OMR_ICW_ENABLE;
if ((a12_intr_dc.on = (f != NULL)) != 0)
t |= A12_OMR_ICW_ENABLE;
a12_intr_dc.f = f;
alpha_wmb();
REGVAL(A12_OMR) = t;
alpha_mb();
}
long a12_nothing;
static void
clear_gsr_interrupt(write_1_to_clear)
long write_1_to_clear;
{
REGVAL(A12_GSR) = write_1_to_clear;
alpha_mb();
a12_nothing = REGVAL(A12_GSR);
}
static int
pci_serr(p)
void *p;
{
panic("pci_serr");
}
static int
a12_xbar_flag(p)
void *p;
{
panic("a12_xbar_flag: %s", p);
}
static void
a12_GInt(void)
{
struct gintcall *gic;
long gsrsource,
gsrvalue = LOADGSR();
void *s;
/*
* Switch interrupts do not go through this function
*/
for(gic=gintcall; gic->f; ++gic) {
gsrsource = gsrvalue & 1L<<gic->flag;
if (gsrsource && gic->f->on) {
#ifndef EVCNT_COUNTERS
if (gic->intr_index >= INTRCNT_A12_IRQ_LEN)
panic("A12 INTRCNT");
intrcnt[INTRCNT_A12_IRQ + gic->intr_index];
#endif
if(gic->needsclear)
clear_gsr_interrupt(1L<<gic->flag);
s = gic->f->a;
if (s == NULL)
s = gic->msg;
if (gic->f->f == NULL)
printf("Stray interrupt: %s OMR=%lx\n",
gic->msg, REGVAL(A12_OMR) & 0xffc0);
else gic->f->f(s);
alpha_wmb();
}
}
}
/*
* IRQ_H 3 2 1 0
* EV5(10) 23 22 21 20
* EV5(16) 17 16 15 14
* OSF IPL 6 5 4 3
* VECTOR(16) 940 930 920 900 note: no 910 or 940
* f(VECTOR) 4 3 2 0 note: no 1 or 4
* EVENT Never Clk Misc Xbar
*/
void
a12_iointr(framep, vec)
void *framep;
unsigned long vec;
{
unsigned irq = (vec-0x900) >> 4; /* this is the f(vector) above */
/*
* Xbar device is in the A12 CPU core logic, so its interrupts
* might as well be hardwired.
*/
#ifdef EVCNT_COUNTERS
++a12_intr_evcnt.ev_count;
#else
/* XXX implicit knowledge of intrcnt[] */
if(irq < 2)
++intrcnt[INTRCNT_A12_IRQ + irq];
#if 2 >= INTRCNT_A12_IRQ_LEN
#error INTRCNT_A12_IRQ_LEN inconsistent with respect to intrcnt[] use
#endif
#endif
switch(irq) {
case 0:
if (a12_intr_xb.f == NULL)
panic("no switch interrupt registered");
else a12_intr_xb.f(NULL);
return;
case 2:
a12_GInt();
return;
default:
panic("a12_iointr");
}
}
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