path: root/hw/acpi/pci.c

/*
 * Support for generating PCI related ACPI tables and passing them to Guests
 *
 * Copyright (C) 2006 Fabrice Bellard
 * Copyright (C) 2008-2010  Kevin O'Connor <kevin@koconnor.net>
 * Copyright (C) 2013-2019 Red Hat Inc
 * Copyright (C) 2019 Intel Corporation
 *
 * Author: Wei Yang <richardw.yang@linux.intel.com>
 * Author: Michael S. Tsirkin <mst@redhat.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/>.
 */

#include "qemu/osdep.h"
#include "hw/acpi/aml-build.h"
#include "hw/acpi/pci.h"
#include "hw/pci/pcie_host.h"

void build_mcfg(GArray *table_data, BIOSLinker *linker, AcpiMcfgInfo *info)
{
    AcpiTableMcfg *mcfg;
    int len = sizeof(*mcfg) + sizeof(mcfg->allocation[0]);

    mcfg = acpi_data_push(table_data, len);
    mcfg->allocation[0].address = cpu_to_le64(info->base);

    /* Only a single allocation so no need to play with segments */
    mcfg->allocation[0].pci_segment = cpu_to_le16(0);
    mcfg->allocation[0].start_bus_number = 0;
    mcfg->allocation[0].end_bus_number = PCIE_MMCFG_BUS(info->size - 1);

    build_header(linker, table_data, (void *)mcfg, "MCFG", len, 1, NULL, NULL);
}