[Qemu-devel] [6313] cuda: improve date/time read/write

[Aurelien Jarno <aurelien@aurel32.net>]

Revision: 6313
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6313
Author:   aurel32
Date:     2009-01-15 18:57:15 +0000 (Thu, 15 Jan 2009)

Log Message:
-----------
cuda: improve date/time read/write

- Allow date/time to be written
- Use qemu_get_timedate() to initialize the clock

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

Modified Paths:
--------------
    trunk/hw/cuda.c

Modified: trunk/hw/cuda.c
===================================================================
--- trunk/hw/cuda.c	2009-01-15 17:27:45 UTC (rev 6312)
+++ trunk/hw/cuda.c	2009-01-15 18:57:15 UTC (rev 6313)
@@ -131,6 +131,8 @@
 
     CUDATimer timers[2];
 
+    uint32_t tick_offset;
+
     uint8_t last_b; /* last value of B register */
     uint8_t last_acr; /* last value of B register */
 
@@ -510,7 +512,8 @@
                                 const uint8_t *data, int len)
 {
     uint8_t obuf[16];
-    int ti, autopoll;
+    int autopoll;
+    uint32_t ti;
 
     switch(data[0]) {
     case CUDA_AUTOPOLL:
@@ -529,13 +532,19 @@
         obuf[1] = data[1];
         cuda_send_packet_to_host(s, obuf, 2);
         break;
-    case CUDA_GET_TIME:
     case CUDA_SET_TIME:
-        /* XXX: add time support ? */
-        ti = time(NULL) + RTC_OFFSET;
+        ti = (((uint32_t)data[1]) << 24) + (((uint32_t)data[2]) << 16) + (((uint32_t)data[3]) << 8) + data[4];
+        s->tick_offset = ti - (qemu_get_clock(vm_clock) / ticks_per_sec);
         obuf[0] = CUDA_PACKET;
         obuf[1] = 0;
         obuf[2] = 0;
+        cuda_send_packet_to_host(s, obuf, 3);
+        break;
+    case CUDA_GET_TIME:
+        ti = s->tick_offset + (qemu_get_clock(vm_clock) / ticks_per_sec);
+        obuf[0] = CUDA_PACKET;
+        obuf[1] = 0;
+        obuf[2] = 0;
         obuf[3] = ti >> 24;
         obuf[4] = ti >> 16;
         obuf[5] = ti >> 8;
@@ -663,6 +672,7 @@
     qemu_put_ubyte(f, s->autopoll);
     qemu_put_buffer(f, s->data_in, sizeof(s->data_in));
     qemu_put_buffer(f, s->data_out, sizeof(s->data_out));
+    qemu_put_be32s(f, &s->tick_offset);
     cuda_save_timer(f, &s->timers[0]);
     cuda_save_timer(f, &s->timers[1]);
 }
@@ -700,6 +710,7 @@
     s->autopoll = qemu_get_ubyte(f);
     qemu_get_buffer(f, s->data_in, sizeof(s->data_in));
     qemu_get_buffer(f, s->data_out, sizeof(s->data_out));
+    qemu_get_be32s(f, &s->tick_offset);
     cuda_load_timer(f, &s->timers[0]);
     cuda_load_timer(f, &s->timers[1]);
 
@@ -735,6 +746,7 @@
 
 void cuda_init (int *cuda_mem_index, qemu_irq irq)
 {
+    struct tm tm;
     CUDAState *s = &cuda_state;
 
     s->irq = irq;
@@ -744,6 +756,9 @@
 
     s->timers[1].index = 1;
 
+    qemu_get_timedate(&tm, RTC_OFFSET);
+    s->tick_offset = mktimegm(&tm);
+
     s->adb_poll_timer = qemu_new_timer(vm_clock, cuda_adb_poll, s);
     *cuda_mem_index = cpu_register_io_memory(0, cuda_read, cuda_write, s);
     register_savevm("cuda", -1, 1, cuda_save, cuda_load, s);