[PATCH v3 1/2] acpi: ged: Add macro for acpi sleep control register

[Bibo Mao]

Macro definition is added for acpi sleep control register, ged emulation
driver can use the macro , also it can be used in FDT table if ged is
exposed with FDT table.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
---
 hw/acpi/generic_event_device.c         | 6 +++---
 include/hw/acpi/generic_event_device.h | 7 +++++--
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
index 15b4c3ebbf..d00f5a6c1c 100644
--- a/hw/acpi/generic_event_device.c
+++ b/hw/acpi/generic_event_device.c
@@ -201,9 +201,9 @@ static void ged_regs_write(void *opaque, hwaddr addr, 
uint64_t data,
 
     switch (addr) {
     case ACPI_GED_REG_SLEEP_CTL:
-        slp_typ = (data >> 2) & 0x07;
-        slp_en  = (data >> 5) & 0x01;
-        if (slp_en && slp_typ == 5) {
+        slp_typ = (data >> ACPI_GED_SLP_TYP_POS) & ACPI_GED_SLP_TYP_MASK;
+        slp_en  = !!(data & ACPI_GED_SLP_EN);
+        if (slp_en && slp_typ == ACPI_GED_SLP_TYP_S5) {
             qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
         }
         return;
diff --git a/include/hw/acpi/generic_event_device.h 
b/include/hw/acpi/generic_event_device.h
index 40af3550b5..d2dac87b4a 100644
--- a/include/hw/acpi/generic_event_device.h
+++ b/include/hw/acpi/generic_event_device.h
@@ -81,8 +81,11 @@ OBJECT_DECLARE_SIMPLE_TYPE(AcpiGedState, ACPI_GED)
 /* ACPI_GED_REG_RESET value for reset*/
 #define ACPI_GED_RESET_VALUE       0x42
 
-/* ACPI_GED_REG_SLEEP_CTL.SLP_TYP value for S5 (aka poweroff) */
-#define ACPI_GED_SLP_TYP_S5        0x05
+/* [ACPI 5.0 Chapter 4.8.3.7] Sleep Control and Status Register */
+#define ACPI_GED_SLP_TYP_POS       0x2   /* SLP_TYPx Bit Offset */
+#define ACPI_GED_SLP_TYP_MASK      0x07  /* SLP_TYPx 3-bit mask */
+#define ACPI_GED_SLP_TYP_S5        0x05  /* System _S5 State (Soft Off) */
+#define ACPI_GED_SLP_EN            0x20  /* SLP_EN write-only bit */
 
 #define GED_DEVICE      "GED"
 #define AML_GED_EVT_REG "EREG"
-- 
2.39.3