1 files changed, 86 insertions, 0 deletions

diff --git a/arch/ppc/syslib/gen550_kgdb.c b/arch/ppc/syslib/gen550_kgdb.c
new file mode 100644
index 000000000000..7239d5d7ddcd
--- /dev/null
+++ b/arch/ppc/syslib/gen550_kgdb.c
@@ -0,0 +1,86 @@
+/*
+ * arch/ppc/syslib/gen550_kgdb.c
+ *
+ * Generic 16550 kgdb support intended to be useful on a variety
+ * of platforms.  To enable this support, it is necessary to set
+ * the CONFIG_GEN550 option.  Any virtual mapping of the serial
+ * port(s) to be used can be accomplished by setting
+ * ppc_md.early_serial_map to a platform-specific mapping function.
+ *
+ * Adapted from ppc4xx_kgdb.c.
+ *
+ * Author: Matt Porter <mporter@kernel.crashing.org>
+ *
+ * 2002-2004 (c) MontaVista Software, Inc.  This file is licensed under
+ * the terms of the GNU General Public License version 2.  This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+
+#include <asm/machdep.h>
+
+extern unsigned long serial_init(int, void *);
+extern unsigned long serial_getc(unsigned long);
+extern unsigned long serial_putc(unsigned long, unsigned char);
+
+#if defined(CONFIG_KGDB_TTYS0)
+#define KGDB_PORT 0
+#elif defined(CONFIG_KGDB_TTYS1)
+#define KGDB_PORT 1
+#elif defined(CONFIG_KGDB_TTYS2)
+#define KGDB_PORT 2
+#elif defined(CONFIG_KGDB_TTYS3)
+#define KGDB_PORT 3
+#else
+#error "invalid kgdb_tty port"
+#endif
+
+static volatile unsigned int kgdb_debugport;
+
+void putDebugChar(unsigned char c)
+{
+        if (kgdb_debugport == 0)
+                kgdb_debugport = serial_init(KGDB_PORT, NULL);
+
+        serial_putc(kgdb_debugport, c);
+}
+
+int getDebugChar(void)
+{
+        if (kgdb_debugport == 0)
+                kgdb_debugport = serial_init(KGDB_PORT, NULL);
+
+        return(serial_getc(kgdb_debugport));
+}
+
+void kgdb_interruptible(int enable)
+{
+        return;
+}
+
+void putDebugString(char* str)
+{
+        while (*str != '\0') {
+                putDebugChar(*str);
+                str++;
+        }
+        putDebugChar('\r');
+        return;
+}
+
+/*
+ * Note: gen550_init() must be called already on the port we are going
+ * to use.
+ */
+void
+gen550_kgdb_map_scc(void)
+{
+        printk(KERN_DEBUG "kgdb init\n");
+        if (ppc_md.early_serial_map)
+                ppc_md.early_serial_map();
+        kgdb_debugport = serial_init(KGDB_PORT, NULL);
+}