pc: acpi: move COM devices from DSDT to SSDT

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/i386/acpi-build.c

@@ -1330,6 +1330,52 @@ static Aml *build_lpt_device_aml(void)
     return dev;
 }
 
+static Aml *build_com_device_aml(uint8_t uid)
+{
+    Aml *dev;
+    Aml *crs;
+    Aml *method;
+    Aml *if_ctx;
+    Aml *else_ctx;
+    Aml *zero = aml_int(0);
+    Aml *is_present = aml_local(0);
+    const char *enabled_field = "CAEN";
+    uint8_t irq = 4;
+    uint16_t io_port = 0x03F8;
+
+    assert(uid == 1 || uid == 2);
+    if (uid == 2) {
+        enabled_field = "CBEN";
+        irq = 3;
+        io_port = 0x02F8;
+    }
+
+    dev = aml_device("COM%d", uid);
+    aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0501")));
+    aml_append(dev, aml_name_decl("_UID", aml_int(uid)));
+
+    method = aml_method("_STA", 0, AML_NOTSERIALIZED);
+    aml_append(method, aml_store(aml_name("%s", enabled_field), is_present));
+    if_ctx = aml_if(aml_equal(is_present, zero));
+    {
+        aml_append(if_ctx, aml_return(aml_int(0x00)));
+    }
+    aml_append(method, if_ctx);
+    else_ctx = aml_else();
+    {
+        aml_append(else_ctx, aml_return(aml_int(0x0f)));
+    }
+    aml_append(method, else_ctx);
+    aml_append(dev, method);
+
+    crs = aml_resource_template();
+    aml_append(crs, aml_io(AML_DECODE16, io_port, io_port, 0x00, 0x08));
+    aml_append(crs, aml_irq_no_flags(irq));
+    aml_append(dev, aml_name_decl("_CRS", crs));
+
+    return dev;
+}
+
 static void build_isa_devices_aml(Aml *table)
 {
     Aml *scope = aml_scope("_SB.PCI0.ISA");
@@ -1339,6 +1385,8 @@ static void build_isa_devices_aml(Aml *table)
     aml_append(scope, build_mouse_device_aml());
     aml_append(scope, build_fdc_device_aml());
     aml_append(scope, build_lpt_device_aml());
+    aml_append(scope, build_com_device_aml(1));
+    aml_append(scope, build_com_device_aml(2));
 
     aml_append(table, scope);
 }

hw/i386/acpi-dsdt-isa.dsl

@@ -1,52 +0,0 @@
-/*
- * 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/>.
- */
-
-/* Common legacy ISA style devices. */
-Scope(\_SB.PCI0.ISA) {
-
-    Device(COM1) {
-        Name(_HID, EisaId("PNP0501"))
-        Name(_UID, 0x01)
-        Method(_STA, 0, NotSerialized) {
-            Store(CAEN, Local0)
-            If (LEqual(Local0, 0)) {
-                Return (0x00)
-            } Else {
-                Return (0x0F)
-            }
-        }
-        Name(_CRS, ResourceTemplate() {
-            IO(Decode16, 0x03F8, 0x03F8, 0x00, 0x08)
-            IRQNoFlags() { 4 }
-        })
-    }
-
-    Device(COM2) {
-        Name(_HID, EisaId("PNP0501"))
-        Name(_UID, 0x02)
-        Method(_STA, 0, NotSerialized) {
-            Store(CBEN, Local0)
-            If (LEqual(Local0, 0)) {
-                Return (0x00)
-            } Else {
-                Return (0x0F)
-            }
-        }
-        Name(_CRS, ResourceTemplate() {
-            IO(Decode16, 0x02F8, 0x02F8, 0x00, 0x08)
-            IRQNoFlags() { 3 }
-        })
-    }
-}

hw/i386/acpi-dsdt.dsl

@@ -80,9 +80,6 @@ DefinitionBlock (
         }
     }
 
-#include "acpi-dsdt-isa.dsl"
-
-
 /****************************************************************
  * PCI hotplug
  ****************************************************************/

hw/i386/q35-acpi-dsdt.dsl

@@ -146,9 +146,6 @@ DefinitionBlock (
         }
     }
 
-#include "acpi-dsdt-isa.dsl"
-
-
 /****************************************************************
  * PCI IRQs
  ****************************************************************/