80 lines
2.8 KiB
C
80 lines
2.8 KiB
C
/*
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* Copyright (c) 2010, Stefan Lankes, RWTH Aachen University
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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 are met:
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* * 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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* * 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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* * Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __ARCH_PROCESSOR_H__
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#define __ARCH_PROCESSOR_H__
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#include <eduos/stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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inline static uint64_t rdtsc(void)
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{
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uint64_t x;
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asm volatile ("rdtsc" : "=A" (x));
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return x;
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}
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inline static void flush_cache(void) {
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asm volatile ("wbinvd" : : : "memory");
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}
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inline static void invalid_cache(void) {
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asm volatile ("invd");
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}
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inline static int get_return_value(void) {
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int ret;
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asm volatile ("movl %%eax, %0" : "=r"(ret));
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return ret;
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}
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/* Force strict CPU ordering */
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#ifdef CONFIG_ROCKCREEK
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inline static void mb(void) { asm volatile ("lock; addl $0,0(%%esp)" ::: "memory", "cc"); }
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inline static void rmb(void) { asm volatile ("lock; addl $0,0(%%esp)" ::: "memory", "cc"); }
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inline static void wmb(void) { asm volatile ("lock; addl $0,0(%%esp)" ::: "memory", "cc"); }
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#else
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inline static void mb(void) { asm volatile("mfence" ::: "memory"); }
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inline static void rmb(void) { asm volatile("lfence" ::: "memory"); }
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inline static void wmb(void) { asm volatile("sfence" ::: "memory"); }
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#endif
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#define NOP1 asm volatile ("nop")
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#define NOP2 asm volatile ("nop;nop")
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#define NOP4 asm volatile ("nop;nop;nop;nop")
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#define NOP8 asm volatile ("nop;nop;nop;nop;nop;nop;nop;nop")
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#ifdef __cplusplus
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}
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#endif
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#endif
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