From 62c79ca63703ee2b2c5947016c0c5e10744c2479 Mon Sep 17 00:00:00 2001 From: Gabe Black Date: Sat, 1 Dec 2007 23:01:17 -0800 Subject: X86: Implement the lgdt instruction. --HG-- extra : convert_revision : d1698a82df3c57cc9bbf8d5d190f271bfc7cb2e4 --- src/arch/x86/isa/insts/system/__init__.py | 3 +- src/arch/x86/isa/insts/system/segmentation.py | 113 ++++++++++++++++++++++++++ 2 files changed, 115 insertions(+), 1 deletion(-) create mode 100644 src/arch/x86/isa/insts/system/segmentation.py (limited to 'src/arch/x86/isa/insts') diff --git a/src/arch/x86/isa/insts/system/__init__.py b/src/arch/x86/isa/insts/system/__init__.py index 422438b1c..5984761a6 100644 --- a/src/arch/x86/isa/insts/system/__init__.py +++ b/src/arch/x86/isa/insts/system/__init__.py @@ -55,7 +55,8 @@ categories = ["halt", "undefined_operation", - "msrs"] + "msrs", + "segmentation"] microcode = "" for category in categories: diff --git a/src/arch/x86/isa/insts/system/segmentation.py b/src/arch/x86/isa/insts/system/segmentation.py new file mode 100644 index 000000000..6067f64a0 --- /dev/null +++ b/src/arch/x86/isa/insts/system/segmentation.py @@ -0,0 +1,113 @@ +# Copyright (c) 2007 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 + +microcode = ''' +def macroop LGDT_M +{ + .adjust_env oszForPseudoDesc + + # Get the limit + ld t1, seg, sib, disp, dataSize=2 + # Get the base + ld t2, seg, sib, 'adjustedDisp + 2' + wrbase gdtr, t2 + wrlimit gdtr, t1 +}; + +def macroop LGDT_P +{ + .adjust_env oszForPseudoDesc + + rdip t7 + # Get the limit + ld t1, seg, riprel, disp, dataSize=2 + # Get the base + ld t2, seg, riprel, 'adjustedDisp + 2' + wrbase gdtr, t2 + wrlimit gdtr, t1 +}; + +# +# These versions are for when the original data size was 16 bits. The base is +# still 32 bits, but the top byte is zeroed before being used. +# + +def macroop LGDT_16_M +{ + .adjust_env oszForPseudoDesc + + # Get the limit + ld t1, seg, sib, disp, dataSize=2 + # Get the base + ld t2, seg, sib, 'adjustedDisp + 2', dataSize=4 + zexti t2, t2, 23 + wrbase gdtr, t2 + wrlimit gdtr, t1 +}; + +def macroop LGDT_16_P +{ + .adjust_env oszForPseudoDesc + + rdip t7 + # Get the limit + ld t1, seg, riprel, disp, dataSize=2 + # Get the base + ld t2, seg, riprel, 'adjustedDisp + 2', dataSize=4 + zexti t2, t2, 23 + wrbase gdtr, t2 + wrlimit gdtr, t1 +}; +''' -- cgit v1.2.3