freebsd-dev/sys/sparc64/include/ktr.h
Jeff Roberson 28d91af30f - Implement run-time expansion of the KTR buffer via sysctl.
- Implement a function to ensure that all preempted threads have switched
   back out at least once.  Use this to make sure there are no stale
   references to the old ktr_buf or the lock profiling buffers before
   updating them.

Reviewed by:	marius (sparc64 parts), attilio (earlier patch)
Sponsored by:	EMC / Isilon Storage Division
2012-11-15 00:51:57 +00:00

109 lines
3.1 KiB
C

/*-
* Copyright (c) 1996 Berkeley Software Design, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Berkeley Software Design Inc's name may not be used to endorse or
* promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from BSDI $Id: ktr.h,v 1.10.2.7 2000/03/16 21:44:42 cp Exp $
* $FreeBSD$
*/
#ifndef _MACHINE_KTR_H_
#define _MACHINE_KTR_H_
#include <sys/ktr.h>
#ifndef LOCORE
#define KTR_CPU PCPU_GET(mid)
#else
/*
* XXX could really use another register...
*/
#define ATR(desc, r1, r2, r3, l1, l2) \
.sect .rodata ; \
l1: .asciz desc ; \
.previous ; \
SET(ktr_idx, r2, r1) ; \
lduw [r1], r2 ; \
l2: add r2, 1, r3 ; \
set KTR_ENTRIES - 1, r1 ; \
and r3, r1, r3 ; \
set ktr_idx, r1 ; \
casa [r1] ASI_N, r2, r3 ; \
cmp r2, r3 ; \
bne %icc, l2 ## b ; \
mov r3, r2 ; \
SET(ktr_buf, r3, r1) ; \
ldx [r1], r1 ; \
mulx r2, KTR_SIZEOF, r2 ; \
add r1, r2, r1 ; \
rd %tick, r2 ; \
stx r2, [r1 + KTR_TIMESTAMP] ; \
lduw [PCPU(MID)], r2 ; \
stw r2, [r1 + KTR_CPU] ; \
stw %g0, [r1 + KTR_LINE] ; \
stx %g0, [r1 + KTR_FILE] ; \
SET(l1 ## b, r3, r2) ; \
stx r2, [r1 + KTR_DESC]
/*
* NB: this clobbers %y.
*/
#define CATR(mask, desc, r1, r2, r3, l1, l2, l3) \
set mask, r1 ; \
SET(ktr_mask, r3, r2) ; \
lduw [r2], r2 ; \
and r2, r1, r1 ; \
brz r1, l3 ## f ; \
nop ; \
lduw [PCPU(CPUID)], r2 ; \
mov _NCPUBITS, r3 ; \
mov %g0, %y ; \
udiv r2, r3, r2 ; \
srl r2, 0, r2 ; \
sllx r2, PTR_SHIFT, r2 ; \
SET(ktr_cpumask, r3, r1) ; \
ldx [r1 + r2], r1 ; \
lduw [PCPU(CPUID)], r2 ; \
mov _NCPUBITS, r3 ; \
mov %g0, %y ; \
udiv r2, r3, r2 ; \
srl r2, 0, r2 ; \
smul r2, r3, r3 ; \
lduw [PCPU(CPUID)], r2 ; \
sub r2, r3, r3 ; \
mov 1, r2 ; \
sllx r2, r3, r2 ; \
andn r1, r2, r1 ; \
brz r1, l3 ## f ; \
nop ; \
ATR(desc, r1, r2, r3, l1, l2)
#endif /* LOCORE */
#endif /* !_MACHINE_KTR_H_ */