| # Copyright (c) 2007 The Hewlett-Packard Development Company |
| # Copyright (c) 2012-2013 AMD |
| # All rights reserved. |
| # |
| # The license below extends only to copyright in the software and shall |
| # not be construed as granting a license to any other intellectual |
| # property including but not limited to intellectual property relating |
| # to a hardware implementation of the functionality of the software |
| # licensed hereunder. You may use the software subject to the license |
| # terms below provided that you ensure that this notice is replicated |
| # unmodified and in its entirety in all distributions of the software, |
| # modified or unmodified, in source code or in binary form. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions are |
| # met: 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 holders nor the names of its |
| # contributors may be used to endorse or promote products derived from |
| # this software without specific prior written permission. |
| # |
| # 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. |
| |
| microcode = ''' |
| def macroop JMP_I |
| { |
| # Make the default data size of jumps 64 bits in 64 bit mode |
| .adjust_env oszIn64Override |
| .control_direct |
| |
| rdip t1 |
| limm t2, imm |
| wrip t1, t2 |
| }; |
| |
| def macroop JMP_R |
| { |
| # Make the default data size of jumps 64 bits in 64 bit mode |
| .adjust_env oszIn64Override |
| .control_indirect |
| |
| wripi reg, 0 |
| }; |
| |
| def macroop JMP_M |
| { |
| # Make the default data size of jumps 64 bits in 64 bit mode |
| .adjust_env oszIn64Override |
| .control_indirect |
| |
| ld t1, seg, sib, disp |
| wripi t1, 0 |
| }; |
| |
| def macroop JMP_P |
| { |
| # Make the default data size of jumps 64 bits in 64 bit mode |
| .adjust_env oszIn64Override |
| .control_indirect |
| |
| rdip t7 |
| ld t1, seg, riprel, disp |
| wripi t1, 0 |
| }; |
| |
| def macroop JMP_FAR_M |
| { |
| .control_indirect |
| |
| limm t1, 0, dataSize=8 |
| limm t2, 0, dataSize=8 |
| lea t1, seg, sib, disp, dataSize=asz |
| ld t2, seg, [1, t0, t1], dsz |
| ld t1, seg, [1, t0, t1] |
| br rom_label("jmpFarWork") |
| }; |
| |
| def macroop JMP_FAR_P |
| { |
| .control_indirect |
| |
| limm t1, 0, dataSize=8 |
| limm t2, 0, dataSize=8 |
| rdip t7, dataSize=asz |
| lea t1, seg, riprel, disp, dataSize=asz |
| ld t2, seg, [1, t0, t1], dsz |
| ld t1, seg, [1, t0, t1] |
| br rom_label("jmpFarWork") |
| }; |
| |
| def macroop JMP_FAR_I |
| { |
| .control_indirect |
| |
| # Put the whole far pointer into a register. |
| limm t2, imm, dataSize=8 |
| # Figure out the width of the offset. |
| limm t3, dsz, dataSize=8 |
| slli t3, t3, 3, dataSize=8 |
| # Get the offset into t1. |
| mov t1, t0, t2 |
| # Get the selector into t2. |
| srl t2, t2, t3, dataSize=8 |
| mov t2, t0, t2, dataSize=2 |
| br rom_label("jmpFarWork") |
| }; |
| |
| def rom |
| { |
| extern jmpFarWork: |
| # t1 has the offset and t2 has the new selector. |
| # This is intended to run in protected mode. |
| andi t0, t2, 0xFC, flags=(EZF,), dataSize=2 |
| fault "std::make_shared<GeneralProtection>(0)", flags=(CEZF,) |
| andi t3, t2, 0xF8, dataSize=8 |
| andi t0, t2, 0x4, flags=(EZF,), dataSize=2 |
| br rom_local_label("farJmpGlobalDescriptor"), flags=(CEZF,) |
| ld t4, tsl, [1, t0, t3], dataSize=8, addressSize=8, atCPL0=True |
| br rom_local_label("farJmpProcessDescriptor") |
| farJmpGlobalDescriptor: |
| ld t4, tsg, [1, t0, t3], dataSize=8, addressSize=8, atCPL0=True |
| farJmpProcessDescriptor: |
| rcri t0, t4, 13, flags=(ECF,), dataSize=2 |
| br rom_local_label("farJmpSystemDescriptor"), flags=(nCECF,) |
| chks t2, t4, CSCheck, dataSize=8 |
| wrdl cs, t4, t2, dataSize=4 |
| wrsel cs, t2, dataSize=4 |
| wrip t0, t1, dataSize=4 |
| eret |
| |
| farJmpSystemDescriptor: |
| panic "Far jumps to system descriptors aren't implemented" |
| eret |
| }; |
| |
| def macroop JMP_FAR_REAL_M |
| { |
| .control_indirect |
| |
| lea t1, seg, sib, disp, dataSize=asz |
| ld t2, seg, [1, t0, t1], dsz |
| ld t1, seg, [1, t0, t1] |
| zexti t3, t1, 15, dataSize=8 |
| slli t3, t3, 4, dataSize=8 |
| wrsel cs, t1, dataSize=2 |
| wrbase cs, t3, dataSize=8 |
| wrip t0, t2, dataSize=asz |
| }; |
| |
| def macroop JMP_FAR_REAL_P |
| { |
| .control_indirect |
| panic "Real mode far jump executed in 64 bit mode!" |
| }; |
| |
| def macroop JMP_FAR_REAL_I |
| { |
| .control_indirect |
| |
| # Put the whole far pointer into a register. |
| limm t2, imm, dataSize=8 |
| # Figure out the width of the offset. |
| limm t3, dsz, dataSize=8 |
| slli t3, t3, 3, dataSize=8 |
| # Get the selector into t1. |
| srl t1, t2, t3, dataSize=8 |
| mov t1, t0, t1, dataSize=2 |
| # And get the offset into t2 |
| mov t2, t0, t2 |
| slli t3, t1, 4, dataSize=8 |
| wrsel cs, t1, dataSize=2 |
| wrbase cs, t3, dataSize=8 |
| wrip t0, t2, dataSize=asz |
| }; |
| ''' |