qemu

FORK: QEMU emulator
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pci.c (2175B)

      1 /*
      2  * Support for generating PCI related ACPI tables and passing them to Guests
      3  *
      4  * Copyright (C) 2006 Fabrice Bellard
      5  * Copyright (C) 2008-2010  Kevin O'Connor <kevin@koconnor.net>
      6  * Copyright (C) 2013-2019 Red Hat Inc
      7  * Copyright (C) 2019 Intel Corporation
      8  *
      9  * Author: Wei Yang <richardw.yang@linux.intel.com>
     10  * Author: Michael S. Tsirkin <mst@redhat.com>
     11  *
     12  * This program is free software; you can redistribute it and/or modify
     13  * it under the terms of the GNU General Public License as published by
     14  * the Free Software Foundation; either version 2 of the License, or
     15  * (at your option) any later version.
     16 
     17  * This program is distributed in the hope that it will be useful,
     18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     20  * GNU General Public License for more details.
     21 
     22  * You should have received a copy of the GNU General Public License along
     23  * with this program; if not, see <http://www.gnu.org/licenses/>.
     24  */
     25 
     26 #include "qemu/osdep.h"
     27 #include "hw/acpi/aml-build.h"
     28 #include "hw/acpi/pci.h"
     29 #include "hw/pci/pcie_host.h"
     30 
     31 /*
     32  * PCI Firmware Specification, Revision 3.0
     33  * 4.1.2 MCFG Table Description.
     34  */
     35 void build_mcfg(GArray *table_data, BIOSLinker *linker, AcpiMcfgInfo *info,
     36                 const char *oem_id, const char *oem_table_id)
     37 {
     38     AcpiTable table = { .sig = "MCFG", .rev = 1,
     39                         .oem_id = oem_id, .oem_table_id = oem_table_id };
     40 
     41     acpi_table_begin(&table, table_data);
     42 
     43     /* Reserved */
     44     build_append_int_noprefix(table_data, 0, 8);
     45     /*
     46      * Memory Mapped Enhanced Configuration Space Base Address Allocation
     47      * Structure
     48      */
     49     /* Base address, processor-relative */
     50     build_append_int_noprefix(table_data, info->base, 8);
     51     /* PCI segment group number */
     52     build_append_int_noprefix(table_data, 0, 2);
     53     /* Starting PCI Bus number */
     54     build_append_int_noprefix(table_data, 0, 1);
     55     /* Final PCI Bus number */
     56     build_append_int_noprefix(table_data, PCIE_MMCFG_BUS(info->size - 1), 1);
     57     /* Reserved */
     58     build_append_int_noprefix(table_data, 0, 4);
     59 
     60     acpi_table_end(linker, &table);
     61 }