[Qemu-devel] [PATCH v1 2/3] xlnx-zynqmp-rtc: Add basic time support

[Alistair Francis]

Allow the guest to determine the time set from the QEMU command line.

Signed-off-by: Alistair Francis <address@hidden>
---

 hw/timer/xlnx-zynqmp-rtc.c         | 24 ++++++++++++++++++++++++
 include/hw/timer/xlnx-zynqmp-rtc.h |  2 ++
 2 files changed, 26 insertions(+)

diff --git a/hw/timer/xlnx-zynqmp-rtc.c b/hw/timer/xlnx-zynqmp-rtc.c
index 40533220fc..eed17805ac 100644
--- a/hw/timer/xlnx-zynqmp-rtc.c
+++ b/hw/timer/xlnx-zynqmp-rtc.c
@@ -29,6 +29,7 @@
 #include "hw/register.h"
 #include "qemu/bitops.h"
 #include "qemu/log.h"
+#include "hw/ptimer.h"
 #include "hw/timer/xlnx-zynqmp-rtc.h"
 
 #ifndef XLNX_ZYNQMP_RTC_ERR_DEBUG
@@ -55,6 +56,13 @@ static void addr_error_int_update_irq(XlnxZynqMPRTC *s)
     qemu_set_irq(s->irq_addr_error_int, pending);
 }
 
+static uint64_t current_time_postr(RegisterInfo *reg, uint64_t val64)
+{
+    XlnxZynqMPRTC *s = XLNX_ZYNQMP_RTC(reg->opaque);
+
+    return mktime(&s->current_tm);
+}
+
 static void rtc_int_status_postw(RegisterInfo *reg, uint64_t val64)
 {
     XlnxZynqMPRTC *s = XLNX_ZYNQMP_RTC(reg->opaque);
@@ -111,11 +119,13 @@ static const RegisterAccessInfo rtc_regs_info[] = {
     {   .name = "SET_TIME_WRITE",  .addr = A_SET_TIME_WRITE,
     },{ .name = "SET_TIME_READ",  .addr = A_SET_TIME_READ,
         .ro = 0xffffffff,
+        .post_read = current_time_postr,
     },{ .name = "CALIB_WRITE",  .addr = A_CALIB_WRITE,
     },{ .name = "CALIB_READ",  .addr = A_CALIB_READ,
         .ro = 0x1fffff,
     },{ .name = "CURRENT_TIME",  .addr = A_CURRENT_TIME,
         .ro = 0xffffffff,
+        .post_read = current_time_postr,
     },{ .name = "CURRENT_TICK",  .addr = A_CURRENT_TICK,
         .ro = 0xffff,
     },{ .name = "ALARM",  .addr = A_ALARM,
@@ -155,6 +165,13 @@ static void rtc_reset(DeviceState *dev)
         register_reset(&s->regs_info[i]);
     }
 
+    qemu_get_timedate(&s->current_tm, 0);
+
+    DB_PRINT("Get time from host: %d-%d-%d %2d:%02d:%02d\n",
+             s->current_tm.tm_year, s->current_tm.tm_mon,
+             s->current_tm.tm_mday, s->current_tm.tm_hour,
+             s->current_tm.tm_min, s->current_tm.tm_sec);
+
     rtc_int_update_irq(s);
     addr_error_int_update_irq(s);
 }
@@ -203,6 +220,13 @@ static const VMStateDescription vmstate_rtc = {
     .minimum_version_id = 1,
     .fields = (VMStateField[]) {
         VMSTATE_UINT32_ARRAY(regs, XlnxZynqMPRTC, XLNX_ZYNQMP_RTC_R_MAX),
+        VMSTATE_INT32(current_tm.tm_sec, XlnxZynqMPRTC),
+        VMSTATE_INT32(current_tm.tm_min, XlnxZynqMPRTC),
+        VMSTATE_INT32(current_tm.tm_hour, XlnxZynqMPRTC),
+        VMSTATE_INT32(current_tm.tm_wday, XlnxZynqMPRTC),
+        VMSTATE_INT32(current_tm.tm_mday, XlnxZynqMPRTC),
+        VMSTATE_INT32(current_tm.tm_mon, XlnxZynqMPRTC),
+        VMSTATE_INT32(current_tm.tm_year, XlnxZynqMPRTC),
         VMSTATE_END_OF_LIST(),
     }
 };
diff --git a/include/hw/timer/xlnx-zynqmp-rtc.h 
b/include/hw/timer/xlnx-zynqmp-rtc.h
index 87649836cc..51a49094ad 100644
--- a/include/hw/timer/xlnx-zynqmp-rtc.h
+++ b/include/hw/timer/xlnx-zynqmp-rtc.h
@@ -79,6 +79,8 @@ typedef struct XlnxZynqMPRTC {
     qemu_irq irq_rtc_int;
     qemu_irq irq_addr_error_int;
 
+    struct tm current_tm;
+
     uint32_t regs[XLNX_ZYNQMP_RTC_R_MAX];
     RegisterInfo regs_info[XLNX_ZYNQMP_RTC_R_MAX];
 } XlnxZynqMPRTC;
-- 
2.14.1