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43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
/*
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* pdp10-ea.h -- PDP10 Effective-Address Calculation
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* Copyright (C) 2018 Mikael Pettersson
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*
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* This file is part of pdp10-tools.
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*
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* pdp10-tools is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* pdp10-tools is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with pdp10-tools. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef PDP10_EA_H
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#define PDP10_EA_H
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#include "pdp10-core.h"
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/* This performs Effective Address Calculation, but not Instruction Fetch
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* or looping on XCT instructions; the caller is assumed to handle that.
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* Returns (uint64_t)-1 on failure (page fault), otherwise a pdp10_vaddr_t
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* (30 bits) and a 1-bit local(0)/global(1) flag in the MSB (2^30).
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*/
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uint64_t pdp10_ea(struct pdp10_cpu *cpu, uint64_t MB);
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static inline int pdp10_ea_is_page_fault(uint64_t ea)
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{
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return ea == (uint64_t)-1;
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}
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static inline int pdp10_ea_is_global(uint64_t ea)
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{
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return ea & (1UL << 30);
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}
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#endif /* PDP10_EA_H */
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