/* * Copyright (c) 2005 Jakub Jermar * 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. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. */ /** @addtogroup kernel_sparc64 * @{ */ /** @file */ #ifndef KERN_sparc64_BARRIER_H_ #define KERN_sparc64_BARRIER_H_ #include <trace.h> /** Flush Instruction pipeline. */ _NO_TRACE static inline void flush_pipeline(void) { unsigned long pc; /* * The FLUSH instruction takes address parameter. * As such, it may trap if the address is not found in DTLB. * * The entire kernel text is mapped by a locked ITLB and * DTLB entries. Therefore, when this function is called, * the %pc register will always be in the range mapped by * DTLB. * */ asm volatile ( "rd %%pc, %[pc]\n" "flush %[pc]\n" : [pc] "=&r" (pc) ); } /** Memory Barrier instruction. */ _NO_TRACE static inline void membar(void) { asm volatile ( "membar #Sync\n" ); } #endif /** @} */