hw/nvram/fw_cfg-acpi.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Add fw_cfg device in DSDT
   4  *
   5  */
   6
   7 #include "qemu/osdep.h"
   8 #include "hw/nvram/fw_cfg_acpi.h"
   9 #include "hw/acpi/aml-build.h"
  10
  11 void fw_cfg_acpi_dsdt_add(Aml *scope, const MemMapEntry *fw_cfg_memmap)
  12 {
  13     Aml *dev = aml_device("FWCF");
  14     aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0002")));
  15     /* device present, functioning, decoding, not shown in UI */
  16     aml_append(dev, aml_name_decl("_STA", aml_int(0xB)));
  17     aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
  18
  19     Aml *crs = aml_resource_template();
  20     aml_append(crs, aml_memory32_fixed(fw_cfg_memmap->base,
  21                                        fw_cfg_memmap->size, AML_READ_WRITE));
  22     aml_append(dev, aml_name_decl("_CRS", crs));
  23     aml_append(scope, dev);
  24 }