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/******************************************************************************
* include/xen/trace.h
*
* Xen Trace Buffer
*
* Copyright (C) 2003 by Intel Research Cambridge
*
* Author: Mark Williamson, mark.a.williamson@intel.com
* Date: January 2004
*
* Copyright (C) 2005 Bin Ren
*
* The trace buffer code is designed to allow debugging traces of Xen to be
* generated on UP / SMP machines. Each trace entry is timestamped so that
* it's possible to reconstruct a chronological record of trace events.
*
* Access to the trace buffers is via a dom0 hypervisor op and analysis of
* trace buffer contents can then be performed using a userland tool.
*/
#ifndef __XEN_TRACE_H__
#define __XEN_TRACE_H__
extern int tb_init_done;
#include <xen/config.h>
#include <public/sysctl.h>
#include <public/trace.h>
#include <asm/trace.h>
/* Used to initialise trace buffer functionality */
void init_trace_bufs(void);
/* used to retrieve the physical address of the trace buffers */
int tb_control(struct xen_sysctl_tbuf_op *tbc);
void __trace_var(u32 event, int cycles, int extra, unsigned char *extra_data);
static inline void trace_var(u32 event, int cycles, int extra,
unsigned char *extra_data)
{
if( unlikely(tb_init_done) )
__trace_var(event, cycles, extra, extra_data);
}
/* Convenience macros for calling the trace function. */
#define TRACE_0D(_e) \
do { \
trace_var(_e, 1, 0, NULL); \
} while ( 0 )
#define TRACE_1D(_e,_d) \
do { \
u32 _d1; \
_d1 = _d; \
trace_var(_e, 1, sizeof(_d1), (unsigned char *)&_d1); \
} while ( 0 )
#define TRACE_2D(_e,d1,d2) \
do { \
u32 _d[2]; \
_d[0]=d1; \
_d[1]=d2; \
trace_var(_e, 1, sizeof(*_d)*2, (unsigned char *)_d); \
} while ( 0 )
#define TRACE_3D(_e,d1,d2,d3) \
do { \
u32 _d[3]; \
_d[0]=d1; \
_d[1]=d2; \
_d[2]=d3; \
trace_var(_e, 1, sizeof(*_d)*3, (unsigned char *)_d); \
} while ( 0 )
#define TRACE_4D(_e,d1,d2,d3,d4) \
do { \
u32 _d[4]; \
_d[0]=d1; \
_d[1]=d2; \
_d[2]=d3; \
_d[3]=d4; \
trace_var(_e, 1, sizeof(*_d)*4, (unsigned char *)_d); \
} while ( 0 )
#define TRACE_5D(_e,d1,d2,d3,d4,d5) \
do { \
u32 _d[5]; \
_d[0]=d1; \
_d[1]=d2; \
_d[2]=d3; \
_d[3]=d4; \
_d[4]=d5; \
trace_var(_e, 1, sizeof(*_d)*5, (unsigned char *)_d); \
} while ( 0 )
#endif /* __XEN_TRACE_H__ */
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