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Diffstat (limited to 'include/asm-mips/sibyte/trace_prof.h')
| -rw-r--r-- | include/asm-mips/sibyte/trace_prof.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/include/asm-mips/sibyte/trace_prof.h b/include/asm-mips/sibyte/trace_prof.h new file mode 100644 index 00000000000..557792075e9 --- /dev/null +++ b/include/asm-mips/sibyte/trace_prof.h @@ -0,0 +1,110 @@ +/* + * 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 */ |