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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; }