NetBSD-5.0.2/sys/arch/powerpc/pci/pci_machdep_common.c
/* $NetBSD: pci_machdep_common.c,v 1.8 2008/04/28 20:23:32 martin Exp $ */
/*-
* Copyright (c) 2007 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Tim Rightnour
*
* 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.
*
* 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.
*/
/*
* Generic PowerPC functions for dealing with a PCI bridge. For most cases,
* these functions will work just fine, however, some machines may need
* specialized code, so those ports are free to write thier own functions
* and call those instead where appropriate.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pci_machdep_common.c,v 1.8 2008/04/28 20:23:32 martin Exp $");
#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 <sys/malloc.h>
#include <uvm/uvm_extern.h>
#define _POWERPC_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <machine/intr.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/pciconf.h>
#include <dev/pci/pciidereg.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
genppc_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno)
{
return 32;
}
const char *
genppc_pci_intr_string(void *v, pci_intr_handle_t ih)
{
static char irqstr[8]; /* 4 + 2 + NULL + sanity */
if (ih == 0 || ih >= ICU_LEN
/* XXX on macppc it's completely legal to have PCI interrupts on a slave PIC */
#ifdef IRQ_SLAVE
|| ih == IRQ_SLAVE
#endif
)
panic("pci_intr_string: bogus handle 0x%x", ih);
sprintf(irqstr, "irq %d", ih);
return (irqstr);
}
const struct evcnt *
genppc_pci_intr_evcnt(void *v, pci_intr_handle_t ih)
{
/* XXX for now, no evcnt parent reported */
return NULL;
}
void *
genppc_pci_intr_establish(void *v, pci_intr_handle_t ih, int level,
int (*func)(void *), void *arg)
{
if (ih == 0 || ih >= ICU_LEN
#ifdef IRQ_SLAVE
|| ih == IRQ_SLAVE
#endif
)
panic("pci_intr_establish: bogus handle 0x%x", ih);
return intr_establish(ih, IST_LEVEL, level, func, arg);
}
void
genppc_pci_intr_disestablish(void *v, void *cookie)
{
intr_disestablish(cookie);
}
void
genppc_pci_conf_interrupt(pci_chipset_tag_t pct, int bus, int dev, int pin,
int swiz, int *iline)
{
/* do nothing */
}
int
genppc_pci_conf_hook(pci_chipset_tag_t pct, int bus, int dev, int func,
pcireg_t id)
{
return (PCI_CONF_DEFAULT);
}
int
genppc_pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
int pin = pa->pa_intrpin;
int line = pa->pa_intrline;
#ifdef DEBUG
printf("%s: pin: %d, line: %d\n", __func__, pin, line);
#endif
if (pin == 0) {
/* No IRQ used. */
aprint_error("pci_intr_map: interrupt pin %d\n", pin);
goto bad;
}
if (pin > 4) {
aprint_error("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) {
aprint_error("pci_intr_map: no mapping for pin %c\n", '@' + pin);
goto bad;
} else {
if (line >= ICU_LEN) {
aprint_error("pci_intr_map: bad interrupt line %d\n", line);
goto bad;
}
}
*ihp = line;
return 0;
bad:
*ihp = -1;
return 1;
}
#ifdef __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH
#include <machine/isa_machdep.h>
#include "isa.h"
void *genppc_pciide_machdep_compat_intr_establish(struct device *,
struct pci_attach_args *, int, int (*)(void *), void *);
void *
genppc_pciide_machdep_compat_intr_establish(struct device *dev,
struct pci_attach_args *pa, int chan, int (*func)(void *), void *arg)
{
#if NISA > 0
int irq;
void *cookie;
irq = PCIIDE_COMPAT_IRQ(chan);
cookie = isa_intr_establish(NULL, irq, IST_LEVEL, IPL_BIO, func, arg);
if (cookie == NULL)
return (NULL);
printf("%s: %s channel interrupting at irq %d\n", dev->dv_xname,
PCIIDE_CHANNEL_NAME(chan), irq);
return (cookie);
#else
panic("pciide_machdep_compat_intr_establish() called");
#endif
}
#endif /* __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH */