forked from Github_Repos/cvw
44 lines
2.2 KiB
Systemverilog
44 lines
2.2 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: kmacsaigoren@hmc.edu 31 May 2021
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// added svmode constants. These aren't strictly necessary since we're just checking one bit,
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// but they're here to stay consistent and to make sure we dont wind up
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// a "NO_TRANSLATE undefined" situation.
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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 (sv32)
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`define VPN_SEGMENT_BITS 10
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`define VPN_BITS 20
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`define PPN_BITS 22
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`define PPN_HIGH_SEGMENT_BITS 12
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`define PA_BITS 34
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`define SVMODE_BITS 1
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// constants to check SATP_MODE against
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// defined in Table 4.3 of the privileged spec
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`define NO_TRANSLATE 0
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`define SV32 1
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`define SV39 8 // These two are only here to stop
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`define SV48 9 // the verilator from yelling at me
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