auto import from //branches/cupcake/...@130745

1 files changed, 70 insertions, 0 deletions

diff --git a/android/hw-kmsg.c b/android/hw-kmsg.c
new file mode 100644
index 0000000..987943b
--- /dev/null
+++ b/android/hw-kmsg.c
@@ -0,0 +1,70 @@
+/* Copyright (C) 2007-2008 The Android Open Source Project
+**
+** This software is licensed under the terms of the GNU General Public
+** License version 2, as published by the Free Software Foundation, and
+** may be copied, distributed, and modified under those terms.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+** GNU General Public License for more details.
+*/
+#include "android/hw-kmsg.h"
+#include "qemu-char.h"
+#include "charpipe.h"
+#include "android/utils/debug.h"
+
+static CharDriverState*  android_kmsg_cs;
+
+typedef struct {
+    CharDriverState*  cs;
+    AndroidKmsgFlags  flags;
+} KernelLog;
+
+static int
+kernel_log_can_read( void*  opaque )
+{
+    return 1024;
+}
+
+static void
+kernel_log_read( void*  opaque, const uint8_t*  from, int  len )
+{
+    KernelLog*  k = opaque;
+
+    if (k->flags & ANDROID_KMSG_PRINT_MESSAGES)
+        printf( "%.*s", len, (const char*)from );
+
+    /* XXXX: TODO: save messages into in-memory buffer for later retrieval */
+}
+
+static void
+kernel_log_init( KernelLog*  k, AndroidKmsgFlags  flags )
+{
+    if ( qemu_chr_open_charpipe( &k->cs, &android_kmsg_cs ) < 0 ) {
+        derror( "could not create kernel log charpipe" );
+        exit(1);
+    }
+
+    qemu_chr_add_handlers( k->cs, kernel_log_can_read, kernel_log_read, NULL, k );
+
+    k->flags = flags;
+}
+
+static KernelLog  _kernel_log[1];
+
+void
+android_kmsg_init( AndroidKmsgFlags  flags )
+{
+    if (_kernel_log->cs == NULL)
+        kernel_log_init( _kernel_log, flags );
+}
+
+
+CharDriverState*  android_kmsg_get_cs( void )
+{
+    if (android_kmsg_cs == NULL) {
+        android_kmsg_init(0);
+    }
+    return android_kmsg_cs;
+}