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Add support for cmo extensions except prefetch.* instructions
(They will be overlapped by ORI instruciton).
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Weiwei Li
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Jul 20, 2023
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| /*=======================================================================================*/ | ||
| /* RISCV Sail Model */ | ||
| /* */ | ||
| /* This Sail RISC-V architecture model, comprising all files and */ | ||
| /* directories except for the snapshots of the Lem and Sail libraries */ | ||
| /* in the prover_snapshots directory (which include copies of their */ | ||
| /* licences), is subject to the BSD two-clause licence below. */ | ||
| /* */ | ||
| /* Copyright (c) 2017-2023 */ | ||
| /* Prashanth Mundkur */ | ||
| /* Rishiyur S. Nikhil and Bluespec, Inc. */ | ||
| /* Jon French */ | ||
| /* Brian Campbell */ | ||
| /* Robert Norton-Wright */ | ||
| /* Alasdair Armstrong */ | ||
| /* Thomas Bauereiss */ | ||
| /* Shaked Flur */ | ||
| /* Christopher Pulte */ | ||
| /* Peter Sewell */ | ||
| /* Alexander Richardson */ | ||
| /* Hesham Almatary */ | ||
| /* Jessica Clarke */ | ||
| /* Microsoft, for contributions by Robert Norton-Wright and Nathaniel Wesley Filardo */ | ||
| /* Peter Rugg */ | ||
| /* Aril Computer Corp., for contributions by Scott Johnson */ | ||
| /* Philipp Tomsich */ | ||
| /* VRULL GmbH, for contributions by its employees */ | ||
| /* PLCT, for contributions by its employees */ | ||
| /* */ | ||
| /* All rights reserved. */ | ||
| /* */ | ||
| /* This software was developed by the above within the Rigorous */ | ||
| /* Engineering of Mainstream Systems (REMS) project, partly funded by */ | ||
| /* EPSRC grant EP/K008528/1, at the Universities of Cambridge and */ | ||
| /* Edinburgh. */ | ||
| /* */ | ||
| /* This software was developed by SRI International and the University of */ | ||
| /* Cambridge Computer Laboratory (Department of Computer Science and */ | ||
| /* Technology) under DARPA/AFRL contract FA8650-18-C-7809 ("CIFV"), and */ | ||
| /* under DARPA contract HR0011-18-C-0016 ("ECATS") as part of the DARPA */ | ||
| /* SSITH research programme. */ | ||
| /* */ | ||
| /* This project has received funding from the European Research Council */ | ||
| /* (ERC) under the European Union’s Horizon 2020 research and innovation */ | ||
| /* programme (grant agreement 789108, ELVER). */ | ||
| /* */ | ||
| /* */ | ||
| /* Redistribution and use in source and binary forms, with or without */ | ||
| /* modification, are permitted provided that the following conditions */ | ||
| /* are met: */ | ||
| /* 1. Redistributions of source code must retain the above copyright */ | ||
| /* notice, this list of conditions and the following disclaimer. */ | ||
| /* 2. Redistributions in binary form must reproduce the above copyright */ | ||
| /* notice, this list of conditions and the following disclaimer in */ | ||
| /* the documentation and/or other materials provided with the */ | ||
| /* distribution. */ | ||
| /* */ | ||
| /* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' */ | ||
| /* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED */ | ||
| /* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A */ | ||
| /* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR */ | ||
| /* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */ | ||
| /* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */ | ||
| /* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF */ | ||
| /* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND */ | ||
| /* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, */ | ||
| /* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT */ | ||
| /* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF */ | ||
| /* SUCH DAMAGE. */ | ||
| /*=======================================================================================*/ | ||
|
|
||
| /* ****************************************************************** */ | ||
| union clause ast = RISCV_ZICBOM : (cbop_zicbom, regidx) | ||
|
|
||
| mapping encdec_cbop : cbop_zicbom <-> bits(12) = { | ||
| CBO_CLEAN <-> 0b000000000001, | ||
| CBO_FLUSH <-> 0b000000000010, | ||
| CBO_INVAL <-> 0b000000000000 | ||
| } | ||
|
|
||
| mapping clause encdec = RISCV_ZICBOM(cbop, rs1) if haveZicbom() | ||
| <-> encdec_cbop(cbop) @ rs1 @ 0b010 @ 0b00000 @ 0b0001111 if haveZicbom() | ||
|
|
||
| mapping cbop_mnemonic : cbop_zicbom <-> string = { | ||
| CBO_CLEAN <-> "cbo.clean", | ||
| CBO_FLUSH <-> "cbo.flush", | ||
| CBO_INVAL <-> "cbo.inval" | ||
| } | ||
|
|
||
| mapping clause assembly = RISCV_ZICBOM(cbop, rs1) | ||
| <-> cbop_mnemonic(cbop) ^ spc() ^ "(" ^ reg_name(rs1) ^ ")" | ||
|
|
||
| val process_clean_inval : (regidx, cbop_zicbom) -> Retired effect {escape, rmem, rmemt, rreg, wmv, wmvt, wreg} | ||
| function process_clean_inval(rs1, cbop) = { | ||
| let rs1_val = X(rs1); | ||
| let cache_block_size = plat_cache_block_size(); | ||
| let begin_addr = rs1_val & ~(cache_block_size - EXTZ(0b1)); | ||
| let offset = begin_addr - rs1_val; | ||
| match ext_data_get_addr(rs1, offset, Read(Data), cache_block_size) { | ||
| Ext_DataAddr_Error(e) => { ext_handle_data_check_error(e); RETIRE_FAIL }, | ||
| Ext_DataAddr_OK(vaddr) => { | ||
| let res: option(ExceptionType) = match translateAddr(vaddr, Read(Data)) { | ||
| TR_Address(paddr, _) => { | ||
| match mem_read(Read(Data), paddr, 1, false, false, false) { | ||
| MemValue(_) => None(), | ||
| MemException(e) => Some(e) | ||
| } | ||
| }, | ||
| TR_Failure(e, _) => Some(e) | ||
| }; | ||
| match res { | ||
| None() => RETIRE_SUCCESS, // do nothing for cbop currently | ||
| Some(e) => { | ||
| match (e) { | ||
| E_Load_Access_Fault() => { handle_mem_exception(vaddr, E_SAMO_Access_Fault()); RETIRE_FAIL }, | ||
| E_Load_Page_Fault() => { handle_mem_exception(vaddr, E_SAMO_Page_Fault()); RETIRE_FAIL } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| function cbo_clean_flush_enable(p : Privilege) -> bool = | ||
| ~((p != Machine & menvcfg.CBCFE() == 0b0) | (p == User & senvcfg.CBCFE() == 0b0)) | ||
|
|
||
| function cbop_for_cbo_inval(p : Privilege) -> option(cbop_zicbom) = { | ||
| let illegal = ((p != Machine) & (menvcfg.CBIE() == 0b00)) | | ||
| ((p == User) & (senvcfg.CBIE() == 0b00)); | ||
| let flush = ((p != Machine) & (menvcfg.CBIE() == 0b01)) | | ||
| ((p == User) & (senvcfg.CBIE() == 0b01)); | ||
| if illegal then None() | ||
| else if flush then Some(CBO_FLUSH) | ||
| else Some(CBO_INVAL) | ||
| } | ||
|
|
||
| function clause execute(RISCV_ZICBOM(cbop, rs1)) = { | ||
| let cbcfe = cbo_clean_flush_enable(cur_privilege); | ||
| let final_op : option(cbop_zicbom) = match (cbop, cbcfe) { | ||
| (CBO_CLEAN, true) => Some(CBO_CLEAN), | ||
| (CBO_CLEAN, false) => None(), | ||
| (CBO_FLUSH, true) => Some(CBO_FLUSH), | ||
| (CBO_FLUSH, false) => None(), | ||
| (CBO_INVAL, _) => cbop_for_cbo_inval(cur_privilege) | ||
| }; | ||
| match final_op { | ||
| None() => { handle_illegal(); RETIRE_FAIL }, | ||
| Some(cbop) => process_clean_inval(rs1, cbop) | ||
| } | ||
| } |
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