diff options
Diffstat (limited to 'hw/acpi/pci.c')
| -rw-r--r-- | hw/acpi/pci.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/hw/acpi/pci.c b/hw/acpi/pci.c new file mode 100644 index 0000000000..9510597a19 --- /dev/null +++ b/hw/acpi/pci.c @@ -0,0 +1,61 @@ +/* + * 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) +{ + int mcfg_start = table_data->len; + + /* + * PCI Firmware Specification, Revision 3.0 + * 4.1.2 MCFG Table Description. + */ + acpi_data_push(table_data, sizeof(AcpiTableHeader)); + /* Reserved */ + build_append_int_noprefix(table_data, 0, 8); + + /* + * Memory Mapped Enhanced Configuration Space Base Address Allocation + * Structure + */ + /* Base address, processor-relative */ + build_append_int_noprefix(table_data, info->base, 8); + /* PCI segment group number */ + build_append_int_noprefix(table_data, 0, 2); + /* Starting PCI Bus number */ + build_append_int_noprefix(table_data, 0, 1); + /* Final PCI Bus number */ + build_append_int_noprefix(table_data, PCIE_MMCFG_BUS(info->size - 1), 1); + /* Reserved */ + build_append_int_noprefix(table_data, 0, 4); + + build_header(linker, table_data, (void *)(table_data->data + mcfg_start), + "MCFG", table_data->len - mcfg_start, 1, NULL, NULL); +} + |