unicore32 additional architecture files: low-level lib: ocd debug

This patch implements low-level debug libraries with On-Chip-Debugger hardware support.

Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 36 insertions, 0 deletions

diff --git a/arch/unicore32/include/mach/ocd.h b/arch/unicore32/include/mach/ocd.h
new file mode 100644
index 000000000000..189fd71bfa34
--- /dev/null
+++ b/arch/unicore32/include/mach/ocd.h
@@ -0,0 +1,36 @@
+/*
+ * linux/arch/unicore32/include/mach/ocd.h
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __MACH_PUV3_OCD_H__
+#define __MACH_PUV3_OCD_H__
+
+#if defined(CONFIG_DEBUG_OCD)
+static inline void ocd_putc(unsigned int c)
+{
+        int status, i = 0x2000000;
+
+        do {
+                if (--i < 0)
+                        return;
+
+                asm volatile ("movc %0, p1.c0, #0" : "=r" (status));
+        } while (status & 2);
+
+        asm("movc p1.c1, %0, #1" : : "r" (c));
+}
+
+#define putc(ch)        ocd_putc(ch)
+#else
+#define putc(ch)
+#endif
+
+#endif