summaryrefslogtreecommitdiff
path: root/src/arch/x86/isa/formats
diff options
context:
space:
mode:
authorGabe Black <gblack@eecs.umich.edu>2008-10-12 15:31:28 -0700
committerGabe Black <gblack@eecs.umich.edu>2008-10-12 15:31:28 -0700
commita76c4b8ca101c0c89659a536da6271d4116850de (patch)
tree3dc57ad774f0bb768c58b50540a6b08a7530aec8 /src/arch/x86/isa/formats
parentd0a43ce2b29da1640248a756dcd07f0f28561df0 (diff)
downloadgem5-a76c4b8ca101c0c89659a536da6271d4116850de.tar.xz
X86: Implement CPUID with a magical function instead of microcode.
Diffstat (limited to 'src/arch/x86/isa/formats')
-rw-r--r--src/arch/x86/isa/formats/cpuid.isa110
-rw-r--r--src/arch/x86/isa/formats/formats.isa3
2 files changed, 113 insertions, 0 deletions
diff --git a/src/arch/x86/isa/formats/cpuid.isa b/src/arch/x86/isa/formats/cpuid.isa
new file mode 100644
index 000000000..204270556
--- /dev/null
+++ b/src/arch/x86/isa/formats/cpuid.isa
@@ -0,0 +1,110 @@
+// Copyright (c) 2008 The Hewlett-Packard Development Company
+// All rights reserved.
+//
+// Redistribution and use of this software in source and binary forms,
+// with or without modification, are permitted provided that the
+// following conditions are met:
+//
+// The software must be used only for Non-Commercial Use which means any
+// use which is NOT directed to receiving any direct monetary
+// compensation for, or commercial advantage from such use. Illustrative
+// examples of non-commercial use are academic research, personal study,
+// teaching, education and corporate research & development.
+// Illustrative examples of commercial use are distributing products for
+// commercial advantage and providing services using the software for
+// commercial advantage.
+//
+// If you wish to use this software or functionality therein that may be
+// covered by patents for commercial use, please contact:
+// Director of Intellectual Property Licensing
+// Office of Strategy and Technology
+// Hewlett-Packard Company
+// 1501 Page Mill Road
+// Palo Alto, California 94304
+//
+// Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer. 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. Neither the name of
+// the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission. No right of
+// sublicense is granted herewith. Derivatives of the software and
+// output created using the software may be prepared, but only for
+// Non-Commercial Uses. Derivatives of the software may be shared with
+// others provided: (i) the others agree to abide by the list of
+// conditions herein which includes the Non-Commercial Use restrictions;
+// and (ii) such Derivatives of the software include the above copyright
+// notice to acknowledge the contribution from this software where
+// applicable, this list of conditions and the disclaimer below.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
+// OWNER 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.
+//
+// Authors: Gabe Black
+
+output header {{
+ class CPUIDInst : public X86ISA::X86StaticInst
+ {
+ public:
+ static const RegIndex foldOBit = 0;
+ /// Constructor
+ CPUIDInst(const char *_mnemonic, ExtMachInst _machInst,
+ OpClass __opClass) :
+ X86ISA::X86StaticInst(_mnemonic, _machInst, __opClass)
+ {
+ }
+
+ std::string generateDisassembly(Addr pc,
+ const SymbolTable *symtab) const;
+ };
+}};
+
+output decoder {{
+ std::string CPUIDInst::generateDisassembly(Addr PC,
+ const SymbolTable *symtab) const
+ {
+ std::stringstream response;
+
+ printMnemonic(response, mnemonic);
+ ccprintf(response, " ");
+ printReg(response, _srcRegIdx[0], machInst.opSize);
+ return response.str();
+ }
+}};
+
+def template CPUIDExecute {{
+ Fault %(class_name)s::execute(%(CPU_exec_context)s *xc,
+ Trace::InstRecord *traceData) const
+ {
+ // If the CPUID instruction used a valid function number, this will
+ // be set to true. Otherwise, the instruction does nothing.
+ bool success;
+ %(op_decl)s;
+ %(op_rd)s;
+ %(code)s;
+ if (success) {
+ %(op_wb)s;
+ }
+ return NoFault;
+ }
+}};
+
+def format CPUIDInst(code, *opt_flags) {{
+ iop = InstObjParams(name, Name, 'CPUIDInst', code, opt_flags)
+ header_output = BasicDeclare.subst(iop)
+ decoder_output = BasicConstructor.subst(iop)
+ decode_block = BasicDecode.subst(iop)
+ exec_output = CPUIDExecute.subst(iop)
+}};
+
diff --git a/src/arch/x86/isa/formats/formats.isa b/src/arch/x86/isa/formats/formats.isa
index 6906413c0..81179ab45 100644
--- a/src/arch/x86/isa/formats/formats.isa
+++ b/src/arch/x86/isa/formats/formats.isa
@@ -85,6 +85,9 @@
//Templates from this format are used later
##include "basic.isa"
+//Include a format to generate a CPUID instruction.
+##include "cpuid.isa"
+
//Include the "unknown" format
##include "unknown.isa"