acpi, acpi_piix, vt82c686: factor out PM1a EVT logic

factor out ACPI PM1a EVT logic.
Later this will be used by ich9 acpi.

Cc: Blue Swirl <blauwirbel@gmail.com>
Cc: Huacai Chen <zltjiangshi@gmail.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

1 files changed, 37 insertions, 0 deletions

diff --git a/hw/acpi.c b/hw/acpi.c
index 08cb12673b..07283befce 100644
--- a/hw/acpi.c
+++ b/hw/acpi.c
@@ -15,6 +15,7 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, see <http://www.gnu.org/licenses/>
  */
+#include "sysemu.h"
 #include "hw.h"
 #include "pc.h"
 #include "acpi.h"
@@ -198,6 +199,42 @@ out:
     return -1;
 }
 
+/* ACPI PM1a EVT */
+uint16_t acpi_pm1_evt_get_sts(ACPIPM1EVT *pm1, int64_t overflow_time)
+{
+    int64_t d = acpi_pm_tmr_get_clock();
+    if (d >= overflow_time) {
+        pm1->sts |= ACPI_BITMASK_TIMER_STATUS;
+    }
+    return pm1->sts;
+}
+
+void acpi_pm1_evt_write_sts(ACPIPM1EVT *pm1, ACPIPMTimer *tmr, uint16_t val)
+{
+    uint16_t pm1_sts = acpi_pm1_evt_get_sts(pm1, tmr->overflow_time);
+    if (pm1_sts & val & ACPI_BITMASK_TIMER_STATUS) {
+        /* if TMRSTS is reset, then compute the new overflow time */
+        acpi_pm_tmr_calc_overflow_time(tmr);
+    }
+    pm1->sts &= ~val;
+}
+
+void acpi_pm1_evt_power_down(ACPIPM1EVT *pm1, ACPIPMTimer *tmr)
+{
+    if (!pm1) {
+        qemu_system_shutdown_request();
+    } else if (pm1->en & ACPI_BITMASK_POWER_BUTTON_ENABLE) {
+        pm1->sts |= ACPI_BITMASK_POWER_BUTTON_STATUS;
+        tmr->update_sci(tmr);
+    }
+}
+
+void acpi_pm1_evt_reset(ACPIPM1EVT *pm1)
+{
+    pm1->sts = 0;
+    pm1->en = 0;
+}
+
 /* ACPI PM_TMR */
 void acpi_pm_tmr_update(ACPIPMTimer *tmr, bool enable)
 {