1# Copyright (c) 2007 The Hewlett-Packard Development Company 2# All rights reserved. 3# 4# Redistribution and use of this software in source and binary forms, 5# with or without modification, are permitted provided that the 6# following conditions are met: 7# 8# The software must be used only for Non-Commercial Use which means any 9# use which is NOT directed to receiving any direct monetary 10# compensation for, or commercial advantage from such use. Illustrative 11# examples of non-commercial use are academic research, personal study, 12# teaching, education and corporate research & development. 13# Illustrative examples of commercial use are distributing products for 14# commercial advantage and providing services using the software for 15# commercial advantage. 16# 17# If you wish to use this software or functionality therein that may be 18# covered by patents for commercial use, please contact: 19# Director of Intellectual Property Licensing 20# Office of Strategy and Technology 21# Hewlett-Packard Company 22# 1501 Page Mill Road 23# Palo Alto, California 94304 24# 25# Redistributions of source code must retain the above copyright notice, 26# this list of conditions and the following disclaimer. Redistributions 27# in binary form must reproduce the above copyright notice, this list of 28# conditions and the following disclaimer in the documentation and/or 29# other materials provided with the distribution. Neither the name of 30# the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its 31# contributors may be used to endorse or promote products derived from 32# this software without specific prior written permission. No right of 33# sublicense is granted herewith. Derivatives of the software and 34# output created using the software may be prepared, but only for 35# Non-Commercial Uses. Derivatives of the software may be shared with 36# others provided: (i) the others agree to abide by the list of 37# conditions herein which includes the Non-Commercial Use restrictions; 38# and (ii) such Derivatives of the software include the above copyright 39# notice to acknowledge the contribution from this software where 40# applicable, this list of conditions and the disclaimer below. 41# 42# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 43# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 44# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 45# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 46# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 47# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 48# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 49# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 50# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 51# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 52# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 53# 54# Authors: Gabe Black 55 56microcode = ''' 57def macroop JMP_I 58{ 59 # Make the default data size of jumps 64 bits in 64 bit mode 60 .adjust_env oszIn64Override 61 62 rdip t1 63 limm t2, imm 64 wrip t1, t2 65}; 66 67def macroop JMP_R 68{ 69 # Make the default data size of jumps 64 bits in 64 bit mode 70 .adjust_env oszIn64Override 71 72 wripi reg, 0 73}; 74 75def macroop JMP_M 76{ 77 # Make the default data size of jumps 64 bits in 64 bit mode 78 .adjust_env oszIn64Override 79 80 ld t1, seg, sib, disp 81 wripi t1, 0 82}; 83 84def macroop JMP_P 85{ 86 # Make the default data size of jumps 64 bits in 64 bit mode 87 .adjust_env oszIn64Override 88 89 rdip t7 90 ld t1, seg, riprel, disp 91 wripi t1, 0 92}; 93 94def macroop JMP_FAR_M 95{ 96 limm t1, 0, dataSize=8 97 limm t2, 0, dataSize=8 98 lea t1, seg, sib, disp, dataSize=asz 99 ld t2, seg, [1, t0, t1], dsz 100 ld t1, seg, [1, t0, t1] 101 br rom_label("jmpFarWork") 102}; 103 104def macroop JMP_FAR_P 105{ 106 limm t1, 0, dataSize=8 107 limm t2, 0, dataSize=8 108 rdip t7, dataSize=asz 109 lea t1, seg, riprel, disp, dataSize=asz 110 ld t2, seg, [1, t0, t1], dsz 111 ld t1, seg, [1, t0, t1] 112 br rom_label("jmpFarWork") 113}; 114 115def macroop JMP_FAR_I 116{ 117 # Put the whole far pointer into a register. 118 limm t2, imm, dataSize=8 119 # Figure out the width of the offset. 120 limm t3, dsz, dataSize=8
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121 sll t3, t3, 3, dataSize=8
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121 slli t3, t3, 3, dataSize=8 |
122 # Get the selector into t1. 123 sll t1, t2, t3, dataSize=8 124 mov t1, t0, t1, dataSize=2 125 # And get the offset into t2 126 mov t2, t0, t2 127 br rom_label("jmpFarWork") 128}; 129 130def rom 131{ 132 extern jmpFarWork: 133 # t1 has the offset and t2 has the new selector. 134 # This is intended to run in protected mode. 135 andi t0, t2, 0xFC, flags=(EZF,), dataSize=2 136 fault "new GeneralProtection(0)", flags=(CEZF,) 137 andi t3, t2, 0xF8, dataSize=8 138 andi t0, t2, 0x4, flags=(EZF,), dataSize=2 139 br rom_local_label("farJmpGlobalDescriptor"), flags=(CEZF,) 140 ld t4, tsl, [1, t0, t3], dataSize=8, addressSize=8, atCPL0=True 141 br rom_local_label("farJmpProcessDescriptor") 142farJmpGlobalDescriptor: 143 ld t4, tsg, [1, t0, t3], dataSize=8, addressSize=8, atCPL0=True 144farJmpProcessDescriptor: 145 rcri t0, t4, 13, flags=(ECF,), dataSize=2 146 br rom_local_label("farJmpSystemDescriptor"), flags=(nCECF,) 147 chks t2, t4, CSCheck, dataSize=8 148 wrdl cs, t4, t2 149 wrsel cs, t2 150 wrip t0, t1 151 eret 152 153farJmpSystemDescriptor: 154 panic "Far jumps to system descriptors aren't implemented" 155 eret 156}; 157 158def macroop JMP_FAR_REAL_M 159{ 160 lea t1, seg, sib, disp, dataSize=asz 161 ld t2, seg, [1, t0, t1], dsz 162 ld t1, seg, [1, t0, t1] 163 zexti t3, t1, 15, dataSize=8 164 slli t3, t3, 4, dataSize=8 165 wrsel cs, t1, dataSize=2 166 wrbase cs, t3 167 wrip t0, t2, dataSize=asz 168}; 169 170def macroop JMP_FAR_REAL_P 171{ 172 panic "Real mode far jump executed in 64 bit mode!" 173}; 174 175def macroop JMP_FAR_REAL_I 176{ 177 # Put the whole far pointer into a register. 178 limm t2, imm, dataSize=8 179 # Figure out the width of the offset. 180 limm t3, dsz, dataSize=8
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181 sll t3, t3, 3, dataSize=8
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181 slli t3, t3, 3, dataSize=8 |
182 # Get the selector into t1. 183 sll t1, t2, t3, dataSize=8 184 mov t1, t0, t1, dataSize=2 185 # And get the offset into t2 186 mov t2, t0, t2 187 slli t3, t3, 4, dataSize=8 188 wrsel cs, t1, dataSize=2 189 wrbase cs, t3 190 wrip t0, t2, dataSize=asz 191}; 192'''
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