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[MIPS] Sibyte: Fix ZBbus profiler

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o Fix build error.
 o Handle error returns.
 o Deal with signals received while sleeping.
 o Don't allow to be selected when we're not building the directory with
   the driver anyway.
 o Coding style cleanups.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle 2007-03-09 15:59:56 +00:00
parent ca6f5494f5
commit bb9b813bb6
4 changed files with 283 additions and 218 deletions
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110
include/asm-mips/sibyte/trace_prof.h
View file

@ -1,110 +0,0 @@
/*
* Copyright (C) 2001 Broadcom Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __ASM_SIBYTE_TRACE_PROF_H
#define __ASM_SIBYTE_TRACE_PROF_H
#undef DBG
#if SBPROF_TB_DEBUG
#define DBG(a) a
#else
#define DBG(a)
#endif
#define SBPROF_TB_MAJOR 240
#define DEVNAME "bcm1250_tbprof"
typedef u_int64_t tb_sample_t[6*256];
struct sbprof_tb {
int open;
tb_sample_t *sbprof_tbbuf;
int next_tb_sample;
volatile int tb_enable;
volatile int tb_armed;
wait_queue_head_t tb_sync;
wait_queue_head_t tb_read;
};
#define MAX_SAMPLE_BYTES (24*1024*1024)
#define MAX_TBSAMPLE_BYTES (12*1024*1024)
#define MAX_SAMPLES (MAX_SAMPLE_BYTES/sizeof(u_int32_t))
#define TB_SAMPLE_SIZE (sizeof(tb_sample_t))
#define MAX_TB_SAMPLES (MAX_TBSAMPLE_BYTES/TB_SAMPLE_SIZE)
/* IOCTLs */
#define SBPROF_ZBSTART _IOW('s', 0, int)
#define SBPROF_ZBSTOP _IOW('s', 1, int)
#define SBPROF_ZBWAITFULL _IOW('s', 2, int)
/***************************************************************************
* Routines for gathering ZBbus profiles using trace buffer
***************************************************************************/
/* Requires: Already called zclk_timer_init with a value that won't
saturate 40 bits. No subsequent use of SCD performance counters
or trace buffer.
Effect: Starts gathering random ZBbus profiles using trace buffer. */
extern int sbprof_zbprof_start(struct file *filp);
/* Effect: Stops collection of ZBbus profiles */
extern int sbprof_zbprof_stop(void);
/***************************************************************************
* Routines for using 40-bit SCD cycle counter
*
* Client responsible for either handling interrupts or making sure
* the cycles counter never saturates, e.g., by doing
* zclk_timer_init(0) at least every 2^40 - 1 ZCLKs.
***************************************************************************/
/* Configures SCD counter 0 to count ZCLKs starting from val;
Configures SCD counters1,2,3 to count nothing.
Must not be called while gathering ZBbus profiles.
unsigned long long val; */
#define zclk_timer_init(val) \
__asm__ __volatile__ (".set push;" \
".set mips64;" \
"la $8, 0xb00204c0;" /* SCD perf_cnt_cfg */ \
"sd %0, 0x10($8);" /* write val to counter0 */ \
"sd %1, 0($8);" /* config counter0 for zclks*/ \
".set pop" \
: /* no outputs */ \
/* enable, counter0 */ \
: /* inputs */ "r"(val), "r" ((1ULL << 33) | 1ULL) \
: /* modifies */ "$8" )
/* Reads SCD counter 0 and puts result in value
unsigned long long val; */
#define zclk_get(val) \
__asm__ __volatile__ (".set push;" \
".set mips64;" \
"la $8, 0xb00204c0;" /* SCD perf_cnt_cfg */ \
"ld %0, 0x10($8);" /* write val to counter0 */ \
".set pop" \
: /* outputs */ "=r"(val) \
: /* inputs */ \
: /* modifies */ "$8" )
#endif /* __ASM_SIBYTE_TRACE_PROF_H */