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/* $OpenBSD: acpimcfg.c,v 1.2 2011/01/05 22:29:31 kettenis Exp $ */
/*
* Copyright (c) 2010 Mark Kettenis <kettenis@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/apicvar.h>
#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
#include <dev/pci/pcivar.h>
int acpimcfg_match(struct device *, void *, void *);
void acpimcfg_attach(struct device *, struct device *, void *);
struct cfattach acpimcfg_ca = {
sizeof(struct device), acpimcfg_match, acpimcfg_attach
};
struct cfdriver acpimcfg_cd = {
NULL, "acpimcfg", DV_DULL
};
int
acpimcfg_match(struct device *parent, void *match, void *aux)
{
struct acpi_attach_args *aaa = aux;
struct acpi_table_header *hdr;
/*
* If we do not have a table, it is not us
*/
if (aaa->aaa_table == NULL)
return (0);
/*
* If it is an MCFG table, we can attach
*/
hdr = (struct acpi_table_header *)aaa->aaa_table;
if (memcmp(hdr->signature, MCFG_SIG, sizeof(MCFG_SIG) - 1) != 0)
return (0);
return (1);
}
void
acpimcfg_attach(struct device *parent, struct device *self, void *aux)
{
struct acpi_attach_args *aaa = aux;
struct acpi_mcfg *mcfg = (struct acpi_mcfg *)aaa->aaa_table;
printf(" addr 0x%llx, bus %d-%d\n", mcfg->base_address,
mcfg->min_bus_number, mcfg->max_bus_number);
/*
* Some (broken?) BIOSen have an MCFG table for an empty bus
* range. Ignore those tables.
*/
if (mcfg->min_bus_number == mcfg->max_bus_number)
return;
pci_mcfg_addr = mcfg->base_address;
pci_mcfg_min_bus = mcfg->min_bus_number;
pci_mcfg_max_bus = mcfg->max_bus_number;
}
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