54 lines
994 B
C
54 lines
994 B
C
/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* AMD SYSCALL and SYSRET CPU Instructions.
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*
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*
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*
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* Author: Miran Grca, <mgrca8@gmail.com>
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* Copyright 2016-2018 Miran Grca.
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*/
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static int
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opSYSCALL(uint32_t fetchdat)
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{
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int ret;
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ILLEGAL_ON(!(msr.amd_efer & 0x0000000000000001));
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ret = syscall_op(fetchdat);
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if (ret <= 1) {
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CLOCK_CYCLES(20);
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PREFETCH_RUN(20, 7, -1, 0,0,0,0, 0);
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PREFETCH_FLUSH();
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CPU_BLOCK_END();
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}
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return ret;
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}
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static int
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opSYSRET(uint32_t fetchdat)
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{
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int ret;
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ILLEGAL_ON(!(msr.amd_efer & 0x0000000000000001));
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ret = sysret(fetchdat);
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if (ret <= 1) {
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CLOCK_CYCLES(20);
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PREFETCH_RUN(20, 7, -1, 0,0,0,0, 0);
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PREFETCH_FLUSH();
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CPU_BLOCK_END();
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}
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return ret;
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}
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