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34 lines
1.7 KiB
Systemverilog
34 lines
1.7 KiB
Systemverilog
//////////////////////////////////////////
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// wally-constants.vh
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//
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// Written: tfleming@hmc.edu 4 March 2021
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// Modified:
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//
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// Purpose: Specify certain constants defined in the RISC-V 64-bit architecture.
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// These macros should not be changed, except in the event of an
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// update to the architecture or particularly special circumstances.
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//
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// A component of the Wally configurable RISC-V project.
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//
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// Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
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// modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
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// is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
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// OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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///////////////////////////////////////////
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// Virtual Memory Constants (sv39)
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`define VPN_SEGMENT_BITS 9
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`define VPN_BITS 27
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`define PPN_BITS 44
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`define PPN_HIGH_SEGMENT_BITS 26
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`define PA_BITS 56
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