[RFC V2 PATCH 02/11] acpi: Implement control method sleep button

[Annie Li <annie.li@oracle.com>]

The control method sleep button is added, as well as its GPE event
handler.

Co-developed-by: Miguel Luis <miguel.luis@oracle.com>
Signed-off-by: Annie Li <annie.li@oracle.com>
---
 hw/acpi/control_method_device.c         | 54 +++++++++++++++++++++++++
 hw/acpi/meson.build                     |  1 +
 include/hw/acpi/control_method_device.h | 25 ++++++++++++
 3 files changed, 80 insertions(+)

diff --git a/hw/acpi/control_method_device.c b/hw/acpi/control_method_device.c
new file mode 100644
index 0000000000..f52c190352
--- /dev/null
+++ b/hw/acpi/control_method_device.c
@@ -0,0 +1,54 @@
+/*
+ * Control method devices
+ *
+ * Copyright (c) 2023 Oracle and/or its affiliates.
+ *
+ *
+ * Authors:
+ *     Annie Li <annie.li@oracle.com>
+ *
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "hw/acpi/control_method_device.h"
+#include "hw/mem/nvdimm.h"
+
+void acpi_dsdt_add_sleep_button(Aml *scope)
+{
+    Aml *dev = aml_device("\\_SB."ACPI_SLEEP_BUTTON_DEVICE);
+    aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0C0E")));
+    Aml *pkg = aml_package(2);
+    aml_append(pkg, aml_int(0x01));
+    aml_append(pkg, aml_int(0x04));
+    aml_append(dev, aml_name_decl("_PRW", pkg));
+    aml_append(dev, aml_operation_region("\\Boo", AML_SYSTEM_IO,
+                                         aml_int(0x201), 0x1));
+    Aml *field = aml_field("\\Boo", AML_BYTE_ACC, AML_NOLOCK,
+                           AML_WRITE_AS_ZEROS);
+    aml_append(field, aml_named_field("SBP", 1));
+    aml_append(field, aml_named_field("SBW", 1));
+    aml_append(dev, field);
+    aml_append(scope, dev);
+}
+
+void acpi_dsdt_add_sleep_gpe_event_handler(Aml *scope)
+{
+     Aml *method = aml_method("_L07", 0, AML_NOTSERIALIZED);
+     Aml *condition = aml_if(aml_name("\\_SB.SLPB.SBP"));
+     aml_append(condition, aml_store(aml_int(1), aml_name("\\_SB.SLPB.SBP")));
+     aml_append(condition,
+                aml_notify(aml_name("\\_SB."ACPI_SLEEP_BUTTON_DEVICE),
+                                    aml_int(0x80)));
+     aml_append(method, condition);
+     condition = aml_if(aml_name("\\_SB.SLPB.SBW"));
+     aml_append(condition, aml_store(aml_int(1), aml_name("\\_SB.SLPB.SBW")));
+     aml_append(condition,
+                aml_notify(aml_name("\\_SB."ACPI_SLEEP_BUTTON_DEVICE),
+                                    aml_int(0x2)));
+     aml_append(method, condition);
+     aml_append(scope, method);
+}
diff --git a/hw/acpi/meson.build b/hw/acpi/meson.build
index fa5c07db90..0b4f1b432d 100644
--- a/hw/acpi/meson.build
+++ b/hw/acpi/meson.build
@@ -17,6 +17,7 @@ acpi_ss.add(when: 'CONFIG_ACPI_PCI', if_true: files('pci.c'))
 acpi_ss.add(when: 'CONFIG_ACPI_CXL', if_true: files('cxl.c'), if_false: files('cxl-stub.c'))
 acpi_ss.add(when: 'CONFIG_ACPI_VMGENID', if_true: files('vmgenid.c'))
 acpi_ss.add(when: 'CONFIG_ACPI_HW_REDUCED', if_true: files('generic_event_device.c'))
+acpi_ss.add(when: 'CONFIG_ACPI_HW_REDUCED', if_true: files('control_method_device.c'))
 acpi_ss.add(when: 'CONFIG_ACPI_HMAT', if_true: files('hmat.c'))
 acpi_ss.add(when: 'CONFIG_ACPI_APEI', if_true: files('ghes.c'), if_false: files('ghes-stub.c'))
 acpi_ss.add(when: 'CONFIG_ACPI_PIIX4', if_true: files('piix4.c'))
diff --git a/include/hw/acpi/control_method_device.h b/include/hw/acpi/control_method_device.h
new file mode 100644
index 0000000000..87f8d6fd59
--- /dev/null
+++ b/include/hw/acpi/control_method_device.h
@@ -0,0 +1,25 @@
+/*
+ * Control method devices
+ *
+ * Copyright (c) 2023 Oracle and/or its affiliates.
+ *
+ *
+ * Authors:
+ *     Annie Li <annie.li@oracle.com>
+ *
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+
+#ifndef HW_ACPI_CONTROL_METHOD_DEVICE_H
+#define HW_ACPI_CONTROL_NETHOD_DEVICE_H
+
+#define ACPI_SLEEP_BUTTON_DEVICE "SLPB"
+
+void acpi_dsdt_add_sleep_button(Aml *scope);
+void acpi_dsdt_add_sleep_gpe_event_handler(Aml *scope);
+
+#endif
-- 
2.43.5