acpi: factor out fw_cfg_add_acpi_dsdt()

Add helper function to add fw_cfg device,
also move code to hw/i386/fw_cfg.c.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20200619091905.21676-8-kraxel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 1 insertions, 23 deletions

diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 13113e83df..19e9c298dc 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1802,30 +1802,8 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
 
     /* create fw_cfg node, unconditionally */
     {
-        /* when using port i/o, the 8-bit data register *always* overlaps
-         * with half of the 16-bit control register. Hence, the total size
-         * of the i/o region used is FW_CFG_CTL_SIZE; when using DMA, the
-         * DMA control register is located at FW_CFG_DMA_IO_BASE + 4 */
-        uint8_t io_size = object_property_get_bool(OBJECT(x86ms->fw_cfg),
-                                                   "dma_enabled", NULL) ?
-                          ROUND_UP(FW_CFG_CTL_SIZE, 4) + sizeof(dma_addr_t) :
-                          FW_CFG_CTL_SIZE;
-
         scope = aml_scope("\\_SB.PCI0");
-        dev = aml_device("FWCF");
-
-        aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0002")));
-
-        /* device present, functioning, decoding, not shown in UI */
-        aml_append(dev, aml_name_decl("_STA", aml_int(0xB)));
-
-        crs = aml_resource_template();
-        aml_append(crs,
-            aml_io(AML_DECODE16, FW_CFG_IO_BASE, FW_CFG_IO_BASE, 0x01, io_size)
-        );
-        aml_append(dev, aml_name_decl("_CRS", crs));
-
-        aml_append(scope, dev);
+        fw_cfg_add_acpi_dsdt(scope, x86ms->fw_cfg);
         aml_append(dsdt, scope);
     }