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/*
Copyright (C) 2001 Paul Davis
Code derived from various headers from the Linux kernel
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __jack_cycles_h__
#define __jack_cycles_h__
/* PowerPC */
#define CPU_FTR_601 0x00000100
#ifdef __powerpc64__
#define CPU_FTR_CELL_TB_BUG 0x0000800000000000UL
#endif /* __powerpc64__ */
typedef unsigned long cycles_t;
/* For the "cycle" counter we use the timebase lower half. */
extern cycles_t cacheflush_time;
static inline cycles_t get_cycles (void)
{
cycles_t ret = 0;
#ifdef __powerpc64__
#ifdef ENABLE_CELLBE
asm volatile ( \
"90: mftb %0;\n" \
"97: cmpwi %0,0;\n" \
" beq- 90b;\n" \
"99:\n" \
".section __ftr_fixup,\"a\"\n" \
".align 3\n" \
"98:\n" \
" .llong %1\n" \
" .llong %1\n" \
" .llong 97b-98b\n" \
" .llong 99b-98b\n" \
".previous" \
: "=r" (ret) : "i" (CPU_FTR_CELL_TB_BUG));
#else /* !ENABLE_CELLBE */
__asm__ __volatile__ ("mftb %0" : "=r" (ret));
#endif /* !ENABLE_CELLBE */
#else /* !__powerpc64__ */
__asm__ __volatile__ (
"98: mftb %0\n"
"99:\n"
".section __ftr_fixup,\"a\"\n"
" .long %1\n"
" .long 0\n"
" .long 98b\n"
" .long 99b\n"
".previous"
: "=r" (ret) : "i" (CPU_FTR_601));
#endif /* !__powerpc64__ */
return ret;
}
#endif /* __jack_cycles_h__ */
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