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/*-
* Copyright (c) 2001 Doug Rabson
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/boot/ia64/ski/ssc.c 135696 2004-09-24 03:53:50Z marcel $");
#include <stand.h>
#include "libski.h"
/*
* Ugh... Work around a bug in the Linux version of ski for SSC_GET_RTC. The
* PSR.dt register is not preserved properly and causes further memory
* references to be done without translation. All we need to do is preserve
* PSR.dt across the SSC call. We do this by saving and restoring psr.l
* completely.
*/
u_int64_t
ssc(u_int64_t in0, u_int64_t in1, u_int64_t in2, u_int64_t in3, int which)
{
register u_int64_t psr;
register u_int64_t ret0 __asm("r8");
__asm __volatile("mov %0=psr;;" : "=r"(psr));
__asm __volatile("mov r15=%1\n\t"
"break 0x80000;;"
: "=r"(ret0)
: "r"(which), "r"(in0), "r"(in1), "r"(in2), "r"(in3));
__asm __volatile("mov psr.l=%0;; srlz.d" :: "r"(psr));
return ret0;
}