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/*
* acpi_mmconfig.c - Architecture-Specific Low-Level ACPI Boot Support
*
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
* Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; If not, see <http://www.gnu.org/licenses/>.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* copied from Linux
*/
#include <xen/config.h>
#include <xen/errno.h>
#include <xen/init.h>
#include <xen/acpi.h>
#include <xen/irq.h>
#include <xen/dmi.h>
#include <asm/fixmap.h>
#include <asm/page.h>
#include <asm/apic.h>
#include <asm/io_apic.h>
#include <asm/apic.h>
#include <asm/io.h>
#include <asm/mpspec.h>
#include <asm/processor.h>
#include <mach_apic.h>
#include <mach_mpparse.h>
#include "mmconfig.h"
/* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
struct acpi_mcfg_allocation *pci_mmcfg_config;
int pci_mmcfg_config_num;
static int __init acpi_mcfg_check_entry(struct acpi_table_mcfg *mcfg,
struct acpi_mcfg_allocation *cfg)
{
int year;
if (cfg->address < 0xFFFFFFFF)
return 0;
if (!strcmp(mcfg->header.oem_id, "SGI") ||
!strcmp(mcfg->header.oem_id, "SGI2"))
return 0;
if (mcfg->header.revision >= 1 &&
dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) &&
year >= 2010)
return 0;
printk(KERN_ERR "MCFG region for %04x:%02x-%02x at %#"PRIx64
" (above 4GB) ignored\n",
cfg->pci_segment, cfg->start_bus_number, cfg->end_bus_number,
cfg->address);
return -EINVAL;
}
int __init acpi_parse_mcfg(struct acpi_table_header *header)
{
struct acpi_table_mcfg *mcfg;
unsigned long i;
if (!header)
return -EINVAL;
mcfg = (struct acpi_table_mcfg *)header;
/* how many config structures do we have */
pci_mmcfg_config_num = 0;
i = header->length - sizeof(struct acpi_table_mcfg);
while (i >= sizeof(struct acpi_mcfg_allocation)) {
++pci_mmcfg_config_num;
i -= sizeof(struct acpi_mcfg_allocation);
};
if (pci_mmcfg_config_num == 0) {
printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
return -ENODEV;
}
pci_mmcfg_config = xmalloc_array(struct acpi_mcfg_allocation,
pci_mmcfg_config_num);
if (!pci_mmcfg_config) {
printk(KERN_WARNING PREFIX
"No memory for MCFG config tables\n");
return -ENOMEM;
}
memcpy(pci_mmcfg_config, &mcfg[1],
pci_mmcfg_config_num * sizeof(*pci_mmcfg_config));
for (i = 0; i < pci_mmcfg_config_num; ++i) {
if (acpi_mcfg_check_entry(mcfg, &pci_mmcfg_config[i])) {
xfree(pci_mmcfg_config);
pci_mmcfg_config_num = 0;
return -ENODEV;
}
pci_add_segment(pci_mmcfg_config[i].pci_segment);
}
return 0;
}
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