1 files changed, 106 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/trace.h b/arch/blackfin/include/asm/trace.h
new file mode 100644
index 000000000..33589a29b
--- /dev/null
+++ b/arch/blackfin/include/asm/trace.h
@@ -0,0 +1,106 @@
+/*
+ * header file for hardware trace functions
+ *
+ * Copyright 2007-2008 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef _BLACKFIN_TRACE_
+#define _BLACKFIN_TRACE_
+
+/* Normally, we use ON, but you can't turn on software expansion until
+ * interrupts subsystem is ready
+ */
+
+#define BFIN_TRACE_INIT ((CONFIG_DEBUG_BFIN_HWTRACE_COMPRESSION << 4) | 0x03)
+#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
+#define BFIN_TRACE_ON   (BFIN_TRACE_INIT | (CONFIG_DEBUG_BFIN_HWTRACE_EXPAND << 2))
+#else
+#define BFIN_TRACE_ON   (BFIN_TRACE_INIT)
+#endif
+
+#ifndef __ASSEMBLY__
+extern unsigned long trace_buff_offset;
+extern unsigned long software_trace_buff[];
+#if defined(CONFIG_DEBUG_VERBOSE)
+extern void decode_address(char *buf, unsigned long address);
+extern bool get_instruction(unsigned int *val, unsigned short *address);
+#else
+static inline void decode_address(char *buf, unsigned long address) { }
+static inline bool get_instruction(unsigned int *val, unsigned short *address) { return false; }
+#endif
+
+/* Trace Macros for C files */
+
+#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
+
+#define trace_buffer_init() bfin_write_TBUFCTL(BFIN_TRACE_INIT)
+
+#define trace_buffer_save(x) \
+	do { \
+		(x) = bfin_read_TBUFCTL(); \
+		bfin_write_TBUFCTL((x) & ~TBUFEN); \
+	} while (0)
+
+#define trace_buffer_restore(x) \
+	do { \
+		bfin_write_TBUFCTL((x));        \
+	} while (0)
+#else /* DEBUG_BFIN_HWTRACE_ON */
+
+#define trace_buffer_save(x)
+#define trace_buffer_restore(x)
+#endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
+
+#else
+/* Trace Macros for Assembly files */
+
+#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
+
+#define trace_buffer_stop(preg, dreg)	\
+	preg.L = LO(TBUFCTL);		\
+	preg.H = HI(TBUFCTL);		\
+	dreg = 0x1;			\
+	[preg] = dreg;
+
+#define trace_buffer_init(preg, dreg) \
+	preg.L = LO(TBUFCTL);         \
+	preg.H = HI(TBUFCTL);         \
+	dreg = BFIN_TRACE_INIT;       \
+	[preg] = dreg;
+
+#define trace_buffer_save(preg, dreg) \
+	preg.L = LO(TBUFCTL); \
+	preg.H = HI(TBUFCTL); \
+	dreg = [preg]; \
+	[--sp] = dreg; \
+	dreg = 0x1; \
+	[preg] = dreg;
+
+#define trace_buffer_restore(preg, dreg) \
+	preg.L = LO(TBUFCTL); \
+	preg.H = HI(TBUFCTL); \
+	dreg = [sp++]; \
+	[preg] = dreg;
+
+#else /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
+
+#define trace_buffer_stop(preg, dreg)
+#define trace_buffer_init(preg, dreg)
+#define trace_buffer_save(preg, dreg)
+#define trace_buffer_restore(preg, dreg)
+
+#endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
+
+#ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE
+# define DEBUG_HWTRACE_SAVE(preg, dreg)    trace_buffer_save(preg, dreg)
+# define DEBUG_HWTRACE_RESTORE(preg, dreg) trace_buffer_restore(preg, dreg)
+#else
+# define DEBUG_HWTRACE_SAVE(preg, dreg)
+# define DEBUG_HWTRACE_RESTORE(preg, dreg)
+#endif
+
+#endif /* __ASSEMBLY__ */
+
+#endif				/* _BLACKFIN_TRACE_ */