249 lines
6.6 KiB
C
249 lines
6.6 KiB
C
/* $NetBSD: ttwoga_pci.c,v 1.2 2002/05/15 16:57:43 thorpej Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1999, 2000 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Jason R. Thorpe.
|
|
*
|
|
* 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
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, 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 <sys/cdefs.h> /* RCS ID & Copyright macro defns */
|
|
|
|
__KERNEL_RCSID(0, "$NetBSD: ttwoga_pci.c,v 1.2 2002/05/15 16:57:43 thorpej Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/device.h>
|
|
#include <sys/lock.h>
|
|
|
|
#include <dev/pci/pcireg.h>
|
|
#include <dev/pci/pcivar.h>
|
|
|
|
#include <alpha/pci/ttwogareg.h>
|
|
#include <alpha/pci/ttwogavar.h>
|
|
|
|
void ttwoga_attach_hook(struct device *, struct device *,
|
|
struct pcibus_attach_args *);
|
|
int ttwoga_bus_maxdevs(void *, int);
|
|
pcitag_t ttwoga_make_tag(void *, int, int, int);
|
|
void ttwoga_decompose_tag(void *, pcitag_t, int *, int *,
|
|
int *);
|
|
pcireg_t ttwoga_conf_read(void *, pcitag_t, int);
|
|
void ttwoga_conf_write(void *, pcitag_t, int, pcireg_t);
|
|
|
|
paddr_t ttwoga_make_type0addr(int, int);
|
|
|
|
/*
|
|
* The T2 has an annoying bug that can manifest itself while
|
|
* probing for devices. If a non-existent CBUS address is
|
|
* accessed with a read, "a few" subsequent write cycles
|
|
* will generate spurious memory errors. We work around this
|
|
* by tracking which CPU has the PCI configuration mutex and
|
|
* "expect" machine checks on that CPU for the duraction of
|
|
* the PCI configuration access routine.
|
|
*/
|
|
|
|
struct simplelock ttwoga_conf_slock;
|
|
cpuid_t ttwoga_conf_cpu; /* XXX core logic bug */
|
|
|
|
#define TTWOGA_CONF_LOCK(s) \
|
|
do { \
|
|
(s) = splhigh(); \
|
|
simple_lock(&ttwoga_conf_slock); \
|
|
ttwoga_conf_cpu = cpu_number(); \
|
|
} while (0)
|
|
|
|
#define TTWOGA_CONF_UNLOCK(s) \
|
|
do { \
|
|
ttwoga_conf_cpu = (cpuid_t)-1; \
|
|
simple_unlock(&ttwoga_conf_slock); \
|
|
splx((s)); \
|
|
} while (0)
|
|
|
|
void
|
|
ttwoga_pci_init(pci_chipset_tag_t pc, void *v)
|
|
{
|
|
|
|
simple_lock_init(&ttwoga_conf_slock);
|
|
|
|
pc->pc_conf_v = v;
|
|
pc->pc_attach_hook = ttwoga_attach_hook;
|
|
pc->pc_bus_maxdevs = ttwoga_bus_maxdevs;
|
|
pc->pc_make_tag = ttwoga_make_tag;
|
|
pc->pc_decompose_tag = ttwoga_decompose_tag;
|
|
pc->pc_conf_read = ttwoga_conf_read;
|
|
pc->pc_conf_write = ttwoga_conf_write;
|
|
}
|
|
|
|
void
|
|
ttwoga_attach_hook(struct device *parent, struct device *self,
|
|
struct pcibus_attach_args *pba)
|
|
{
|
|
}
|
|
|
|
int
|
|
ttwoga_bus_maxdevs(void *cpv, int busno)
|
|
{
|
|
|
|
return 32;
|
|
}
|
|
|
|
pcitag_t
|
|
ttwoga_make_tag(void *cpv, int b, int d, int f)
|
|
{
|
|
|
|
/* This is the format used for Type 1 configuration cycles. */
|
|
return (b << 16) | (d << 11) | (f << 8);
|
|
}
|
|
|
|
void
|
|
ttwoga_decompose_tag(void *cpv, pcitag_t tag, int *bp, int *dp, int *fp)
|
|
{
|
|
|
|
if (bp != NULL)
|
|
*bp = (tag >> 16) & 0xff;
|
|
if (dp != NULL)
|
|
*dp = (tag >> 11) & 0x1f;
|
|
if (fp != NULL)
|
|
*fp = (tag >> 8) & 0x7;
|
|
}
|
|
|
|
paddr_t
|
|
ttwoga_make_type0addr(int d, int f)
|
|
{
|
|
|
|
if (d > 8) /* XXX ??? */
|
|
return ((paddr_t) -1);
|
|
return ((0x0800UL << d) | (f << 8));
|
|
}
|
|
|
|
pcireg_t
|
|
ttwoga_conf_read(void *cpv, pcitag_t tag, int offset)
|
|
{
|
|
struct ttwoga_config *tcp = cpv;
|
|
pcireg_t *datap, data;
|
|
int s, b, d, f, ba;
|
|
paddr_t addr;
|
|
u_int64_t old_hae3;
|
|
|
|
pci_decompose_tag(&tcp->tc_pc, tag, &b, &d, &f);
|
|
|
|
addr = b ? tag : ttwoga_make_type0addr(d, f);
|
|
if (addr == (paddr_t)-1)
|
|
return ((pcireg_t) -1);
|
|
|
|
TTWOGA_CONF_LOCK(s);
|
|
|
|
alpha_mb();
|
|
old_hae3 = T2GA(tcp, T2_HAE0_3) & ~HAE0_3_PCA;
|
|
T2GA(tcp, T2_HAE0_3) =
|
|
old_hae3 | ((b ? 1UL : 0UL) << HAE0_3_PCA_SHIFT);
|
|
alpha_mb();
|
|
alpha_mb();
|
|
|
|
datap =
|
|
(pcireg_t *)ALPHA_PHYS_TO_K0SEG(tcp->tc_sysmap->tsmap_conf_base |
|
|
addr << 5UL | /* address shift */
|
|
(offset & ~0x03) << 5UL | /* address shift */
|
|
0x3 << 3UL); /* 4-byte, size shift */
|
|
data = (pcireg_t)-1;
|
|
if (!(ba = badaddr(datap, sizeof *datap)))
|
|
data = *datap;
|
|
|
|
alpha_mb();
|
|
T2GA(tcp, T2_HAE0_3) = old_hae3;
|
|
alpha_mb();
|
|
alpha_mb();
|
|
|
|
alpha_pal_draina();
|
|
alpha_mb();
|
|
alpha_mb();
|
|
|
|
TTWOGA_CONF_UNLOCK(s);
|
|
|
|
#if 0
|
|
printf("ttwoga_conf_read: tag 0x%lx, reg 0x%x -> 0x%x @ %p%s\n",
|
|
tag, offset, data, datap, ba ? " (badaddr)" : "");
|
|
#endif
|
|
|
|
return (data);
|
|
}
|
|
|
|
void
|
|
ttwoga_conf_write(void *cpv, pcitag_t tag, int offset, pcireg_t data)
|
|
{
|
|
struct ttwoga_config *tcp = cpv;
|
|
pcireg_t *datap;
|
|
int s, b, d, f;
|
|
paddr_t addr;
|
|
u_int64_t old_hae3;
|
|
|
|
pci_decompose_tag(&tcp->tc_pc, tag, &b, &d, &f);
|
|
|
|
addr = b ? tag : ttwoga_make_type0addr(d, f);
|
|
if (addr == (paddr_t)-1)
|
|
return;
|
|
|
|
TTWOGA_CONF_LOCK(s);
|
|
|
|
alpha_mb();
|
|
old_hae3 = T2GA(tcp, T2_HAE0_3) & ~HAE0_3_PCA;
|
|
T2GA(tcp, T2_HAE0_3) =
|
|
old_hae3 | ((b ? 1UL : 0UL) << HAE0_3_PCA_SHIFT);
|
|
alpha_mb();
|
|
alpha_mb();
|
|
|
|
datap =
|
|
(pcireg_t *)ALPHA_PHYS_TO_K0SEG(tcp->tc_sysmap->tsmap_conf_base |
|
|
addr << 5UL | /* address shift */
|
|
(offset & ~0x03) << 5UL | /* address shift */
|
|
0x3 << 3UL); /* 4-byte, size shift */
|
|
|
|
alpha_mb();
|
|
*datap = data;
|
|
alpha_mb();
|
|
alpha_mb();
|
|
|
|
alpha_mb();
|
|
T2GA(tcp, T2_HAE0_3) = old_hae3;
|
|
alpha_mb();
|
|
alpha_mb();
|
|
|
|
TTWOGA_CONF_UNLOCK(s);
|
|
|
|
#if 0
|
|
printf("ttwoga_conf_write: tag 0x%lx, reg 0x%x -> 0x%x @ %p\n",
|
|
tag, offset, data, datap);
|
|
#endif
|
|
}
|