[patch] SPU timebase

[Jeff Johnston]

Patch checked in.

-- Jeff J.

Ken Werner wrote:
> Hi,
>
> this small patch adds support for determining the SPU timebase. Ok to Apply?
>
> Ken
>
> newlib/ChangeLog:
>
> 2008-09-01  Ken Werner  <ken.werner@de.ibm.com>
>
>         * libc/machine/spu/include/spu_timer.h: spu_timebase function added.
>         * libc/machine/spu/spu_timebase.c: New file.
>         * libc/machine/spu/Makefile.am: Add new file.
>
> Index: src/newlib/libc/machine/spu/Makefile.am
> ===================================================================
> --- src.orig/newlib/libc/machine/spu/Makefile.am
> +++ src/newlib/libc/machine/spu/Makefile.am
> @@ -23,7 +23,7 @@ lib_a_SOURCES = setjmp.S assert.c cleare
>  	vsiscanf.c vsniprintf.c vsnprintf.c vsprintf.c vsscanf.c \
>  	stack_reg_va.S spu_clock_svcs.c spu_clock_stop.c spu_timer_flih.S \
>  	spu_timer_slih.c spu_timer_slih_reg.c spu_timer_svcs.c \
> -	spu_timer_stop.c spu_timer_free.c
> +	spu_timer_stop.c spu_timer_free.c spu_timebase.c
>  
>  lib_a_CCASFLAGS = $(AM_CCASFLAGS)
>  lib_a_CFLAGS = $(AM_CFLAGS)
> Index: src/newlib/libc/machine/spu/include/spu_timer.h
> ===================================================================
> --- src.orig/newlib/libc/machine/spu/include/spu_timer.h
> +++ src/newlib/libc/machine/spu/include/spu_timer.h
> @@ -47,6 +47,7 @@ extern int spu_timer_alloc (int interval
>  extern int spu_timer_free (int id);
>  extern int spu_timer_start (int id);
>  extern int spu_timer_stop (int id);
> +extern unsigned spu_timebase (void);
>  
>  /* Interrupt services.  */
>  extern void spu_slih_register (unsigned event_mask,
> Index: src/newlib/libc/machine/spu/spu_timebase.c
> ===================================================================
> --- /dev/null
> +++ src/newlib/libc/machine/spu/spu_timebase.c
> @@ -0,0 +1,51 @@
> +/*
> +(C) Copyright IBM Corp. 2008
> +
> +All rights reserved.
> +
> +Redistribution and use in source and binary forms, with or without
> +modification, are permitted provided that the following conditions are met:
> +
> +* Redistributions of source code must retain the above copyright notice,
> +this list of conditions and the following disclaimer.
> +* 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.
> +* Neither the name of IBM nor the names of its contributors may be
> +used to endorse or promote products derived from this software without
> +specific prior written permission.
> +
> +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER OR CONTRIBUTORS 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.
> +*/
> +
> +#include <spu_timer.h>
> +#include <stdio.h>
> +
> +/* This function queries /proc/cpuinfo and returns the SPU time base in
> +   Hertz.  */
> +unsigned int
> +spu_timebase (void)
> +{
> +  FILE *f;
> +  unsigned tb = 0;
> +  char line[64];
> +  if ((f = fopen ("/proc/cpuinfo", "r")))
> +    {
> +      while (fgets (line, sizeof (line), f))
> +        if (sscanf (line, "timebase : %u", &tb))
> +          break;
> +      fclose (f);
> +    }
> +  return (tb);
> +}
> +
>