acpi: ged: Add macro for acpi sleep control register

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>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20240918014206.2165821-2-maobibo@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>

diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
index 15b4c3ebbf240b34de14295ea626470e302be739..d00f5a6c1c9bbfe2e45c0e250230137e141dd0af 100644 (file)
--- 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 40af3550b56dd395b3b33cddf98d86ea63c3427b..d2dac87b4a9fb9eaca65b0643c91e7622d52d7a2 100644 (file)
--- 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"