[linux-2.6-block.git] / arch / blackfin / include / asm / trace.h

/*
 * 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_ */
Commit	Line	Data
669b792c	1	/*
96f1050d	2	* header file for hardware trace functions
669b792c	3	*
96f1050d RG	4	* Copyright 2007-2008 Analog Devices Inc.
	5	*
	6	* Licensed under the GPL-2 or later.
669b792c RG	7	*/
	8
	9	#ifndef _BLACKFIN_TRACE_
	10	#define _BLACKFIN_TRACE_
	11
518039bc RG	12	/* Normally, we use ON, but you can't turn on software expansion until
	13	* interrupts subsystem is ready
	14	*/
	15
	16	#define BFIN_TRACE_INIT ((CONFIG_DEBUG_BFIN_HWTRACE_COMPRESSION << 4) \| 0x03)
	17	#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
	18	#define BFIN_TRACE_ON (BFIN_TRACE_INIT \| (CONFIG_DEBUG_BFIN_HWTRACE_EXPAND << 2))
	19	#else
	20	#define BFIN_TRACE_ON (BFIN_TRACE_INIT)
	21	#endif
	22
669b792c	23	#ifndef __ASSEMBLY__
518039bc RG	24	extern unsigned long trace_buff_offset;
518039bc RG	25	extern unsigned long software_trace_buff[];
d28cff4b	26	#if defined(CONFIG_DEBUG_VERBOSE)
2a12c463	27	extern void decode_address(char *buf, unsigned long address);
9a95e2f1	28	extern bool get_instruction(unsigned int val, unsigned short address);
d28cff4b	29	#else
9a95e2f1 RG	30	static inline void decode_address(char *buf, unsigned long address) { }
9a95e2f1 RG	31	static inline bool get_instruction(unsigned int val, unsigned short address) { return false; }
d28cff4b	32	#endif
518039bc	33
669b792c RG	34	/* Trace Macros for C files */
669b792c RG	35
518039bc RG	36	#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
518039bc RG	37
46fe23ac GY	38	#define trace_buffer_init() bfin_write_TBUFCTL(BFIN_TRACE_INIT)
46fe23ac GY	39
669b792c	40	#define trace_buffer_save(x) \
518039bc RG	41	do { \
	42	(x) = bfin_read_TBUFCTL(); \
	43	bfin_write_TBUFCTL((x) & ~TBUFEN); \
	44	} while (0)
669b792c RG	45
669b792c RG	46	#define trace_buffer_restore(x) \
518039bc RG	47	do { \
	48	bfin_write_TBUFCTL((x)); \
	49	} while (0)
	50	#else /* DEBUG_BFIN_HWTRACE_ON */
	51
	52	#define trace_buffer_save(x)
	53	#define trace_buffer_restore(x)
	54	#endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
669b792c RG	55
	56	#else
	57	/* Trace Macros for Assembly files */
	58
518039bc RG	59	#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
518039bc RG	60
669b792c RG	61	#define trace_buffer_stop(preg, dreg) \
	62	preg.L = LO(TBUFCTL); \
	63	preg.H = HI(TBUFCTL); \
	64	dreg = 0x1; \
	65	[preg] = dreg;
	66
518039bc RG	67	#define trace_buffer_init(preg, dreg) \
	68	preg.L = LO(TBUFCTL); \
	69	preg.H = HI(TBUFCTL); \
	70	dreg = BFIN_TRACE_INIT; \
669b792c RG	71	[preg] = dreg;
669b792c RG	72
80f31c8a MF	73	#define trace_buffer_save(preg, dreg) \
	74	preg.L = LO(TBUFCTL); \
	75	preg.H = HI(TBUFCTL); \
	76	dreg = [preg]; \
2a0c4fdb	77	[--sp] = dreg; \
80f31c8a MF	78	dreg = 0x1; \
	79	[preg] = dreg;
	80
	81	#define trace_buffer_restore(preg, dreg) \
	82	preg.L = LO(TBUFCTL); \
	83	preg.H = HI(TBUFCTL); \
2a0c4fdb	84	dreg = [sp++]; \
80f31c8a MF	85	[preg] = dreg;
80f31c8a MF	86
518039bc RG	87	#else /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
	88
	89	#define trace_buffer_stop(preg, dreg)
518039bc	90	#define trace_buffer_init(preg, dreg)
80f31c8a MF	91	#define trace_buffer_save(preg, dreg)
80f31c8a MF	92	#define trace_buffer_restore(preg, dreg)
518039bc RG	93
	94	#endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
	95
669b792c	96	#ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE
80f31c8a MF	97	# define DEBUG_HWTRACE_SAVE(preg, dreg) trace_buffer_save(preg, dreg)
80f31c8a MF	98	# define DEBUG_HWTRACE_RESTORE(preg, dreg) trace_buffer_restore(preg, dreg)
669b792c	99	#else
80f31c8a MF	100	# define DEBUG_HWTRACE_SAVE(preg, dreg)
80f31c8a MF	101	# define DEBUG_HWTRACE_RESTORE(preg, dreg)
669b792c RG	102	#endif
	103
	104	#endif /* __ASSEMBLY__ */
	105
	106	#endif /* _BLACKFIN_TRACE_ */