[Qemu-devel] [PULL 33/59] pc: acpi: move PIIX4 isa-bridge and pm devices into SSDT

["Michael S. Tsirkin" <mst@redhat.com>]

From: Igor Mammedov <imammedo@redhat.com>

and also move PRQx fields declaration as it can't be
split out into separate patch since fields use
PCI0.ISA.P40C operation region and OperationRegion
must be declared in the same table as a Field that
uses it. If this condition is not statisfied Windows
will BSOD ans IASL (make check) will error out as well.

For the same reason pm is moved together with isa-bridge
as the later refernces P13C OperationRegion from pm device.

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>
---
 include/hw/acpi/aml-build.h |  1 +
 hw/i386/acpi-build.c        | 77 +++++++++++++++++++++++++++++++++++++++++++--
 hw/i386/acpi-dsdt.dsl       | 52 +++---------------------------
 3 files changed, 81 insertions(+), 49 deletions(-)

diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
index 83c0102..6d6f705 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -82,6 +82,7 @@ typedef enum {
 typedef enum {
     AML_SYSTEM_MEMORY = 0X00,
     AML_SYSTEM_IO = 0X01,
+    AML_PCI_CONFIG = 0X02,
 } AmlRegionSpace;
 
 typedef enum {
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index b0c82b6..0190dd9 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -109,6 +109,7 @@ typedef struct AcpiPmInfo {
 } AcpiPmInfo;
 
 typedef struct AcpiMiscInfo {
+    bool is_piix4;
     bool has_hpet;
     TPMVersion tpm_version;
     const unsigned char *dsdt_code;
@@ -131,10 +132,12 @@ static void acpi_get_dsdt(AcpiMiscInfo *info)
     assert(!!piix != !!lpc);
 
     if (piix) {
+        info->is_piix4 = true;
         info->dsdt_code = AcpiDsdtAmlCode;
         info->dsdt_size = sizeof AcpiDsdtAmlCode;
     }
     if (lpc) {
+        info->is_piix4 = false;
         info->dsdt_code = Q35AcpiDsdtAmlCode;
         info->dsdt_size = sizeof Q35AcpiDsdtAmlCode;
     }
@@ -1426,6 +1429,68 @@ static void build_dbg_aml(Aml *table)
     aml_append(table, scope);
 }
 
+static void build_piix4_pci0_int(Aml *table)
+{
+    Aml *field;
+    Aml *sb_scope = aml_scope("_SB");
+
+    field = aml_field("PCI0.ISA.P40C", AML_BYTE_ACC, AML_NOLOCK, AML_PRESERVE);
+    aml_append(field, aml_named_field("PRQ0", 8));
+    aml_append(field, aml_named_field("PRQ1", 8));
+    aml_append(field, aml_named_field("PRQ2", 8));
+    aml_append(field, aml_named_field("PRQ3", 8));
+    aml_append(sb_scope, field);
+
+    aml_append(table, sb_scope);
+}
+
+static void build_piix4_pm(Aml *table)
+{
+    Aml *dev;
+    Aml *scope;
+
+    scope =  aml_scope("_SB.PCI0");
+    dev = aml_device("PX13");
+    aml_append(dev, aml_name_decl("_ADR", aml_int(0x00010003)));
+
+    aml_append(dev, aml_operation_region("P13C", AML_PCI_CONFIG,
+                                         0x00, 0xff));
+    aml_append(scope, dev);
+    aml_append(table, scope);
+}
+
+static void build_piix4_isa_bridge(Aml *table)
+{
+    Aml *dev;
+    Aml *scope;
+    Aml *field;
+
+    scope =  aml_scope("_SB.PCI0");
+    dev = aml_device("ISA");
+    aml_append(dev, aml_name_decl("_ADR", aml_int(0x00010000)));
+
+    /* PIIX PCI to ISA irq remapping */
+    aml_append(dev, aml_operation_region("P40C", AML_PCI_CONFIG,
+                                         0x60, 0x04));
+    /* enable bits */
+    field = aml_field("^PX13.P13C", AML_ANY_ACC, AML_NOLOCK, AML_PRESERVE);
+    /* Offset(0x5f),, 7, */
+    aml_append(field, aml_reserved_field(0x2f8));
+    aml_append(field, aml_reserved_field(7));
+    aml_append(field, aml_named_field("LPEN", 1));
+    /* Offset(0x67),, 3, */
+    aml_append(field, aml_reserved_field(0x38));
+    aml_append(field, aml_reserved_field(3));
+    aml_append(field, aml_named_field("CAEN", 1));
+    aml_append(field, aml_reserved_field(3));
+    aml_append(field, aml_named_field("CBEN", 1));
+    aml_append(dev, field);
+    aml_append(dev, aml_name_decl("FDEN", aml_int(1)));
+
+    aml_append(scope, dev);
+    aml_append(table, scope);
+}
+
 static void
 build_ssdt(GArray *table_data, GArray *linker,
            AcpiCpuInfo *cpu, AcpiPmInfo *pm, AcpiMiscInfo *misc,
@@ -1447,8 +1512,16 @@ build_ssdt(GArray *table_data, GArray *linker,
     acpi_data_push(ssdt->buf, sizeof(AcpiTableHeader));
 
     build_dbg_aml(ssdt);
-    build_hpet_aml(ssdt);
-    build_isa_devices_aml(ssdt);
+    if (misc->is_piix4) {
+        build_hpet_aml(ssdt);
+        build_piix4_pm(ssdt);
+        build_piix4_isa_bridge(ssdt);
+        build_isa_devices_aml(ssdt);
+        build_piix4_pci0_int(ssdt);
+    } else {
+        build_hpet_aml(ssdt);
+        build_isa_devices_aml(ssdt);
+    }
     build_cpu_hotplug_aml(ssdt);
     build_memory_hotplug_aml(ssdt, nr_mem, pm->mem_hp_io_base,
                              pm->mem_hp_io_len);
diff --git a/hw/i386/acpi-dsdt.dsl b/hw/i386/acpi-dsdt.dsl
index 6048cc7..11e2e61 100644
--- a/hw/i386/acpi-dsdt.dsl
+++ b/hw/i386/acpi-dsdt.dsl
@@ -40,47 +40,6 @@ DefinitionBlock (
     }
 
 /****************************************************************
- * PIIX4 PM
- ****************************************************************/
-
-    Scope(\_SB.PCI0) {
-        Device(PX13) {
-            Name(_ADR, 0x00010003)
-            OperationRegion(P13C, PCI_Config, 0x00, 0xff)
-        }
-    }
-
-
-/****************************************************************
- * PIIX3 ISA bridge
- ****************************************************************/
-
-    Scope(\_SB.PCI0) {
-
-        External(ISA, DeviceObj)
-
-        Device(ISA) {
-            Name(_ADR, 0x00010000)
-
-            /* PIIX PCI to ISA irq remapping */
-            OperationRegion(P40C, PCI_Config, 0x60, 0x04)
-
-            /* enable bits */
-            Field(\_SB.PCI0.PX13.P13C, AnyAcc, NoLock, Preserve) {
-                Offset(0x5f),
-                , 7,
-                LPEN, 1,         // LPT
-                Offset(0x67),
-                , 3,
-                CAEN, 1,         // COM1
-                , 3,
-                CBEN, 1,         // COM2
-            }
-            Name(FDEN, 1)
-        }
-    }
-
-/****************************************************************
  * PCI hotplug
  ****************************************************************/
 
@@ -168,12 +127,11 @@ DefinitionBlock (
             }
         }
 
-        Field(PCI0.ISA.P40C, ByteAcc, NoLock, Preserve) {
-            PRQ0,   8,
-            PRQ1,   8,
-            PRQ2,   8,
-            PRQ3,   8
-        }
+
+        External(PRQ0, FieldUnitObj)
+        External(PRQ1, FieldUnitObj)
+        External(PRQ2, FieldUnitObj)
+        External(PRQ3, FieldUnitObj)
 
         Method(IQST, 1, NotSerialized) {
             // _STA method - get status
-- 
MST