[Qemu-trivial] [PATCH 3/3] debugcon: add DPRINTF for debugcon debug

[liguang]

Signed-off-by: liguang <address@hidden>
---
 hw/char/debugcon.c |   13 +++++++++++--
 1 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/hw/char/debugcon.c b/hw/char/debugcon.c
index de73f1b..49a76d5 100644
--- a/hw/char/debugcon.c
+++ b/hw/char/debugcon.c
@@ -35,6 +35,15 @@
 
 //#define DEBUG_DEBUGCON
 
+#ifdef DEBUG_DEBUGCON
+#define DPRINTF(fmt, ...) \
+    do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF(fmt, ...) \
+    do { } while (0)
+#endif
+
+
 typedef struct DebugconState {
     MemoryRegion io;
     CharDriverState *chr;
@@ -55,7 +64,7 @@ static void debugcon_ioport_write(void *opaque, hwaddr addr, 
uint64_t val,
     unsigned char ch = val;
 
 #ifdef DEBUG_DEBUGCON
-    printf(" [debugcon: write addr=0x%04" HWADDR_PRIx " val=0x%02"
+    DPRINTF(" [debugcon: write addr=0x%04" HWADDR_PRIx " val=0x%02"
            PRIx64 "]\n", addr, val);
 #endif
 
@@ -68,7 +77,7 @@ static uint64_t debugcon_ioport_read(void *opaque, hwaddr 
addr, unsigned width)
     DebugconState *s = opaque;
 
 #ifdef DEBUG_DEBUGCON
-    printf("debugcon: read addr=0x%04" HWADDR_PRIx "\n", addr);
+    DPRINTF("debugcon: read addr=0x%04" HWADDR_PRIx "\n", addr);
 #endif
 
     return s->readback;
-- 
1.7.2.5