NetBSD/sys/arch/prep/pci/pci_machdep.c

209 lines
5.6 KiB
C

/* NetBSD: pci_machdep.c,v 1.12 2001/06/19 11:56:27 nonaka 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.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/extent.h>
#include <sys/device.h>
#include <uvm/uvm_extern.h>
#define _POWERPC_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <machine/intr.h>
#include <machine/platform.h>
#include <dev/isa/isavar.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/pciconf.h>
/*
* PCI doesn't have any special needs; just use the generic versions
* of these functions.
*/
struct powerpc_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,
};
int
prep_pci_bus_maxdevs(void *v, int busno)
{
/*
* Bus number is irrelevant. Configuration Mechanism 1 is in
* use, can have devices 0-32 (i.e. the `normal' range).
*/
return (32);
}
int
prep_pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
int pin = pa->pa_intrpin;
int line = pa->pa_intrline;
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;
}
if (line == IRQ_SLAVE) {
printf("pci_intr_map: changed line 2 to line 9\n");
line = 9;
}
}
*ihp = line;
return 0;
bad:
*ihp = -1;
return 1;
}
const char *
prep_pci_intr_string(void *v, pci_intr_handle_t ih)
{
static char irqstr[8]; /* 4 + 2 + NULL + sanity */
if (ih == 0 || ih >= ICU_LEN || ih == IRQ_SLAVE)
panic("pci_intr_string: bogus handle 0x%x\n", ih);
sprintf(irqstr, "irq %d", ih);
return (irqstr);
}
const struct evcnt *
prep_pci_intr_evcnt(void *v, pci_intr_handle_t ih)
{
/* XXX for now, no evcnt parent reported */
return NULL;
}
void *
prep_pci_intr_establish(void *v, pci_intr_handle_t ih, int level,
int (*func)(void *), void *arg)
{
if (ih == 0 || ih >= ICU_LEN || ih == IRQ_SLAVE)
panic("pci_intr_establish: bogus handle 0x%x\n", ih);
return isa_intr_establish(NULL, ih, IST_LEVEL, level, func, arg);
}
void
prep_pci_intr_disestablish(void *v, void *cookie)
{
isa_intr_disestablish(NULL, cookie);
}
void
prep_pci_conf_interrupt(void *v, int bus, int dev, int pin,
int swiz, int *iline)
{
(*platform->pci_intr_fixup)(bus, dev, iline);
}
int
prep_pci_conf_hook(void *v, int bus, int dev, int func, pcireg_t id)
{
/*
* The P9100 board found in some IBM machines cannot be
* over-configured.
*/
if (PCI_VENDOR(id) == PCI_VENDOR_WEITEK &&
PCI_PRODUCT(id) == PCI_PRODUCT_WEITEK_P9100)
return 0;
return (PCI_CONF_ALL & ~PCI_CONF_MAP_ROM);
}