54 lines
2.1 KiB
C
54 lines
2.1 KiB
C
/*-
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* Copyright (c) 2001 Doug Rabson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stand.h>
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#include "libski.h"
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/*
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* Ugh... Work around a bug in the Linux version of ski for SSC_GET_RTC. The
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* PSR.dt register is not preserved properly and causes further memory
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* references to be done without translation. All we need to do is preserve
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* PSR.dt across the SSC call. We do this by saving and restoring psr.l
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* completely.
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*/
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u_int64_t
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ssc(u_int64_t in0, u_int64_t in1, u_int64_t in2, u_int64_t in3, int which)
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{
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register u_int64_t psr;
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register u_int64_t ret0 __asm("r8");
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__asm __volatile("mov %0=psr;;" : "=r"(psr));
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__asm __volatile("mov r15=%1\n\t"
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"break 0x80000;;"
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: "=r"(ret0)
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: "r"(which), "r"(in0), "r"(in1), "r"(in2), "r"(in3));
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__asm __volatile("mov psr.l=%0;; srlz.d" :: "r"(psr));
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return ret0;
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}
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