306 lines
7.2 KiB
C
306 lines
7.2 KiB
C
/* $NetBSD: pci_machdep.c,v 1.6 1998/10/21 08:58:36 tsubai Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
|
|
* Copyright (c) 1994 Charles M. Hannum. All rights reserved.
|
|
*
|
|
* 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 Charles M. Hannum.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
|
|
*/
|
|
|
|
/*
|
|
* Machine-specific functions for PCI autoconfiguration.
|
|
*
|
|
* On PCs, there are two methods of generating PCI configuration cycles.
|
|
* We try to detect the appropriate mechanism for this machine and set
|
|
* up a few function pointers to access the correct method directly.
|
|
*
|
|
* The configuration method can be hard-coded in the config file by
|
|
* using `options PCI_CONF_MODE=N', where `N' is the configuration mode
|
|
* as defined section 3.6.4.1, `Generating Configuration Cycles'.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/param.h>
|
|
#include <sys/time.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/device.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_kern.h>
|
|
|
|
#define _MACPPC_BUS_DMA_PRIVATE
|
|
#include <machine/bus.h>
|
|
|
|
#include <machine/bus.h>
|
|
#include <machine/pio.h>
|
|
#include <machine/intr.h>
|
|
|
|
#include <dev/pci/pcivar.h>
|
|
#include <dev/pci/pcireg.h>
|
|
|
|
/*
|
|
* PCI doesn't have any special needs; just use the generic versions
|
|
* of these functions.
|
|
*/
|
|
struct macppc_bus_dma_tag pci_bus_dma_tag = {
|
|
0, /* _bounce_thresh */
|
|
_bus_dmamap_create,
|
|
_bus_dmamap_destroy,
|
|
_bus_dmamap_load,
|
|
_bus_dmamap_load_mbuf,
|
|
_bus_dmamap_load_uio,
|
|
_bus_dmamap_load_raw,
|
|
_bus_dmamap_unload,
|
|
NULL, /* _dmamap_sync */
|
|
_bus_dmamem_alloc,
|
|
_bus_dmamem_free,
|
|
_bus_dmamem_map,
|
|
_bus_dmamem_unmap,
|
|
_bus_dmamem_mmap,
|
|
};
|
|
|
|
void
|
|
pci_attach_hook(parent, self, pba)
|
|
struct device *parent, *self;
|
|
struct pcibus_attach_args *pba;
|
|
{
|
|
}
|
|
|
|
int
|
|
pci_bus_maxdevs(pc, busno)
|
|
pci_chipset_tag_t pc;
|
|
int busno;
|
|
{
|
|
|
|
/*
|
|
* Bus number is irrelevant. Configuration Mechanism 1 is in
|
|
* use, can have devices 0-32 (i.e. the `normal' range).
|
|
*/
|
|
return 32;
|
|
}
|
|
|
|
pcitag_t
|
|
pci_make_tag(pc, bus, device, function)
|
|
pci_chipset_tag_t pc;
|
|
int bus, device, function;
|
|
{
|
|
pcitag_t tag;
|
|
|
|
if (bus >= 256 || device >= 32 || function >= 8)
|
|
panic("pci_make_tag: bad request");
|
|
|
|
tag = 0x80000000 | (bus << 16) | (device << 11) | (function << 8);
|
|
|
|
return tag;
|
|
}
|
|
|
|
void
|
|
pci_decompose_tag(pc, tag, bp, dp, fp)
|
|
pci_chipset_tag_t pc;
|
|
pcitag_t tag;
|
|
int *bp, *dp, *fp;
|
|
{
|
|
if (bp != NULL)
|
|
*bp = (tag >> 16) & 0xff;
|
|
if (dp != NULL)
|
|
*dp = (tag >> 11) & 0x1f;
|
|
if (fp != NULL)
|
|
*fp = (tag >> 8) & 0x7;
|
|
|
|
return;
|
|
}
|
|
|
|
pcireg_t
|
|
pci_conf_read(pc, tag, reg)
|
|
pci_chipset_tag_t pc;
|
|
pcitag_t tag;
|
|
int reg;
|
|
{
|
|
pcireg_t data;
|
|
struct pci_bridge *r;
|
|
|
|
if (pc == PCI_CHIPSET_MPC106) {
|
|
r = &pci_bridges[0];
|
|
|
|
out32rb(r->addr, tag | reg);
|
|
data = in32rb(r->data);
|
|
out32rb(r->addr, 0);
|
|
} else {
|
|
int bus, dev, func;
|
|
|
|
pci_decompose_tag(pc, tag, &bus, &dev, &func);
|
|
|
|
/*
|
|
* bandit's minimum device number is 11. So we behave
|
|
* as if there is no device when dev < 11.
|
|
*/
|
|
if (dev < 11) {
|
|
if (reg == PCI_ID_REG)
|
|
return 0xffffffff;
|
|
panic("pci_conf_read: dev < 11");
|
|
}
|
|
if (func > 7)
|
|
panic("pci_conf_read: func > 7");
|
|
|
|
r = &pci_bridges[pc];
|
|
|
|
out32rb(r->addr, (1 << dev) | (func << 8) | reg);
|
|
DELAY(10);
|
|
data = in32rb(r->data);
|
|
DELAY(10);
|
|
out32rb(r->addr, 0);
|
|
DELAY(10);
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
void
|
|
pci_conf_write(pc, tag, reg, data)
|
|
pci_chipset_tag_t pc;
|
|
pcitag_t tag;
|
|
int reg;
|
|
pcireg_t data;
|
|
{
|
|
struct pci_bridge *r = &pci_bridges[pc];
|
|
|
|
if (pc == PCI_CHIPSET_MPC106) {
|
|
r = &pci_bridges[0];
|
|
|
|
out32rb(r->addr, tag | reg);
|
|
out32rb(r->data, data);
|
|
out32rb(r->addr, 0);
|
|
} else {
|
|
int bus, dev, func;
|
|
|
|
pci_decompose_tag(pc, tag, &bus, &dev, &func);
|
|
|
|
if (dev < 11 || func > 7)
|
|
panic("pci_conf_write");
|
|
|
|
r = &pci_bridges[pc];
|
|
|
|
out32rb(r->addr, (1 << dev) | (func << 8) | reg);
|
|
DELAY(10);
|
|
out32rb(r->data, data);
|
|
DELAY(10);
|
|
out32rb(r->addr, 0);
|
|
DELAY(10);
|
|
}
|
|
}
|
|
|
|
int
|
|
pci_intr_map(pc, intrtag, pin, line, ihp)
|
|
pci_chipset_tag_t pc;
|
|
pcitag_t intrtag;
|
|
int pin, line;
|
|
pci_intr_handle_t *ihp;
|
|
{
|
|
|
|
if (pin == 0) {
|
|
/* No IRQ used. */
|
|
goto bad;
|
|
}
|
|
|
|
if (pin > 4) {
|
|
printf("pci_intr_map: bad interrupt pin %d\n", pin);
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* Section 6.2.4, `Miscellaneous Functions', says that 255 means
|
|
* `unknown' or `no connection' on a PC. We assume that a device with
|
|
* `no connection' either doesn't have an interrupt (in which case the
|
|
* pin number should be 0, and would have been noticed above), or
|
|
* wasn't configured by the BIOS (in which case we punt, since there's
|
|
* no real way we can know how the interrupt lines are mapped in the
|
|
* hardware).
|
|
*
|
|
* XXX
|
|
* Since IRQ 0 is only used by the clock, and we can't actually be sure
|
|
* that the BIOS did its job, we also recognize that as meaning that
|
|
* the BIOS has not configured the device.
|
|
*/
|
|
if (line == 0 || line == 255) {
|
|
printf("pci_intr_map: no mapping for pin %c\n", '@' + pin);
|
|
goto bad;
|
|
} else {
|
|
if (line >= ICU_LEN) {
|
|
printf("pci_intr_map: bad interrupt line %d\n", line);
|
|
goto bad;
|
|
}
|
|
}
|
|
|
|
*ihp = line;
|
|
return 0;
|
|
|
|
bad:
|
|
*ihp = -1;
|
|
return 1;
|
|
}
|
|
|
|
const char *
|
|
pci_intr_string(pc, ih)
|
|
pci_chipset_tag_t pc;
|
|
pci_intr_handle_t ih;
|
|
{
|
|
static char irqstr[8]; /* 4 + 2 + NULL + sanity */
|
|
|
|
if (ih == 0 || ih >= ICU_LEN)
|
|
panic("pci_intr_string: bogus handle 0x%x\n", ih);
|
|
|
|
sprintf(irqstr, "irq %d", ih);
|
|
return (irqstr);
|
|
|
|
}
|
|
|
|
extern void * intr_establish();
|
|
extern void intr_disestablish();
|
|
|
|
void *
|
|
pci_intr_establish(pc, ih, level, func, arg)
|
|
pci_chipset_tag_t pc;
|
|
pci_intr_handle_t ih;
|
|
int level, (*func) __P((void *));
|
|
void *arg;
|
|
{
|
|
|
|
if (ih == 0 || ih >= ICU_LEN)
|
|
panic("pci_intr_establish: bogus handle 0x%x\n", ih);
|
|
|
|
return intr_establish(ih, IST_LEVEL, level, func, arg);
|
|
}
|
|
|
|
void
|
|
pci_intr_disestablish(pc, cookie)
|
|
pci_chipset_tag_t pc;
|
|
void *cookie;
|
|
{
|
|
|
|
intr_disestablish(cookie);
|
|
}
|