forked from luck/tmp_suning_uos_patched
7019cc2dd6
Real-time code needs to know the number of cycles per second on SGI UV. The information is provided via a run time BIOS call. This patch provides the linux side of that interface. This is the first of several run time BIOS calls to be defined in uv/bios.h and bios_uv.c. Note that BIOS_CALL() is just a stub for now. The bios side is being worked on. Signed-off-by: Russ Anderson <rja@sgi.com> Cc: Jack Steiner <steiner@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/*
|
|
* BIOS run time interface routines.
|
|
*
|
|
* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include <asm/uv/bios.h>
|
|
|
|
const char *
|
|
x86_bios_strerror(long status)
|
|
{
|
|
const char *str;
|
|
switch (status) {
|
|
case 0: str = "Call completed without error"; break;
|
|
case -1: str = "Not implemented"; break;
|
|
case -2: str = "Invalid argument"; break;
|
|
case -3: str = "Call completed with error"; break;
|
|
default: str = "Unknown BIOS status code"; break;
|
|
}
|
|
return str;
|
|
}
|
|
|
|
long
|
|
x86_bios_freq_base(unsigned long which, unsigned long *ticks_per_second,
|
|
unsigned long *drift_info)
|
|
{
|
|
struct uv_bios_retval isrv;
|
|
|
|
BIOS_CALL(isrv, BIOS_FREQ_BASE, which, 0, 0, 0, 0, 0, 0);
|
|
*ticks_per_second = isrv.v0;
|
|
*drift_info = isrv.v1;
|
|
return isrv.status;
|
|
}
|
|
EXPORT_SYMBOL_GPL(x86_bios_freq_base);
|