1# Copyright (c) 2007 The Hewlett-Packard Development Company
2# All rights reserved.
3#
4# The license below extends only to copyright in the software and shall
5# not be construed as granting a license to any other intellectual
6# property including but not limited to intellectual property relating
7# to a hardware implementation of the functionality of the software
8# licensed hereunder. You may use the software subject to the license

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33# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
34# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35#
36# Authors: Gabe Black
37
38microcode = '''
39def macroop LGDT_M
40{
41 .adjust_env maxOsz
42
43 # Get the limit
44 ld t1, seg, sib, disp, dataSize=2
45 # Get the base
46 ld t2, seg, sib, 'adjustedDisp + 2'
47 wrbase tsg, t2
48 wrlimit tsg, t1
49};
50
51def macroop LGDT_P
52{
53 .adjust_env maxOsz
54
55 rdip t7
56 # Get the limit
57 ld t1, seg, riprel, disp, dataSize=2
58 # Get the base
59 ld t2, seg, riprel, 'adjustedDisp + 2'
60 wrbase tsg, t2
61 wrlimit tsg, t1
62};
63
64#
65# These versions are for when the original data size was 16 bits. The base is
66# still 32 bits, but the top byte is zeroed before being used.
67#
68
69def macroop LGDT_16_M
70{
71 .adjust_env maxOsz
72
73 # Get the limit
74 ld t1, seg, sib, disp, dataSize=2
75 # Get the base
76 ld t2, seg, sib, 'adjustedDisp + 2', dataSize=4
77 zexti t2, t2, 23, dataSize=8
78 wrbase tsg, t2
79 wrlimit tsg, t1
80};
81
82def macroop LGDT_16_P
83{
84 .adjust_env maxOsz
85
86 rdip t7
87 # Get the limit
88 ld t1, seg, riprel, disp, dataSize=2
89 # Get the base
90 ld t2, seg, riprel, 'adjustedDisp + 2', dataSize=4
91 zexti t2, t2, 23, dataSize=8
92 wrbase tsg, t2
93 wrlimit tsg, t1
94};
95
96def macroop LIDT_M
97{
98 .adjust_env maxOsz
99
100 # Get the limit
101 ld t1, seg, sib, disp, dataSize=2
102 # Get the base
103 ld t2, seg, sib, 'adjustedDisp + 2'
104 wrbase idtr, t2
105 wrlimit idtr, t1
106};
107
108def macroop LIDT_P
109{
110 .adjust_env maxOsz
111
112 rdip t7
113 # Get the limit
114 ld t1, seg, riprel, disp, dataSize=2
115 # Get the base
116 ld t2, seg, riprel, 'adjustedDisp + 2'
117 wrbase idtr, t2
118 wrlimit idtr, t1
119};
120
121#
122# These versions are for when the original data size was 16 bits. The base is
123# still 32 bits, but the top byte is zeroed before being used.
124#
125
126def macroop LIDT_16_M
127{
128 .adjust_env maxOsz
129
130 # Get the limit
131 ld t1, seg, sib, disp, dataSize=2
132 # Get the base
133 ld t2, seg, sib, 'adjustedDisp + 2', dataSize=4
134 zexti t2, t2, 23, dataSize=8
135 wrbase idtr, t2
136 wrlimit idtr, t1
137};
138
139def macroop LIDT_16_P
140{
141 .adjust_env maxOsz
142
143 rdip t7
144 # Get the limit
145 ld t1, seg, riprel, disp, dataSize=2
146 # Get the base
147 ld t2, seg, riprel, 'adjustedDisp + 2', dataSize=4
148 zexti t2, t2, 23, dataSize=8
149 wrbase idtr, t2
150 wrlimit idtr, t1
151};
152
153def macroop LTR_R
154{
155 chks reg, t0, TRCheck
156 limm t4, 0, dataSize=8
157 srli t4, reg, 3, dataSize=2
158 ldst t1, tsg, [8, t4, t0], dataSize=8
159 ld t2, tsg, [8, t4, t0], 8, dataSize=8
160 chks reg, t1, TSSCheck
161 wrdh t3, t1, t2
162 wrdl tr, t1, reg
163 wrbase tr, t3, dataSize=8
164 limm t5, (1 << 9)
165 or t1, t1, t5
166 st t1, tsg, [8, t4, t0], dataSize=8
167};
168
169def macroop LTR_M
170{
171 ld t5, seg, sib, disp, dataSize=2
172 chks t5, t0, TRCheck
173 limm t4, 0, dataSize=8
174 srli t4, t5, 3, dataSize=2
175 ldst t1, tsg, [8, t4, t0], dataSize=8
176 ld t2, tsg, [8, t4, t0], 8, dataSize=8
177 chks t5, t1, TSSCheck
178 wrdh t3, t1, t2
179 wrdl tr, t1, t5
180 wrbase tr, t3, dataSize=8
181 limm t5, (1 << 9)
182 or t1, t1, t5
183 st t1, tsg, [8, t4, t0], dataSize=8
184};
185
186def macroop LTR_P
187{
188 rdip t7
189 ld t5, seg, riprel, disp, dataSize=2
190 chks t5, t0, TRCheck
191 limm t4, 0, dataSize=8
192 srli t4, t5, 3, dataSize=2
193 ldst t1, tsg, [8, t4, t0], dataSize=8
194 ld t2, tsg, [8, t4, t0], 8, dataSize=8
195 chks t5, t1, TSSCheck
196 wrdh t3, t1, t2
197 wrdl tr, t1, t5
198 wrbase tr, t3, dataSize=8
199 limm t5, (1 << 9)
200 or t1, t1, t5
201 st t1, tsg, [8, t4, t0], dataSize=8
202};
203
204def macroop LLDT_R
205{
206 chks reg, t0, InGDTCheck, flags=(EZF,)
207 br label("end"), flags=(CEZF,)
208 limm t4, 0, dataSize=8
209 srli t4, reg, 3, dataSize=2
210 ldst t1, tsg, [8, t4, t0], dataSize=8
211 ld t2, tsg, [8, t4, t0], 8, dataSize=8
212 chks reg, t1, LDTCheck
213 wrdh t3, t1, t2
214 wrdl tr, t1, reg
215 wrbase tr, t3, dataSize=8
216end:
217 fault "NoFault"
218};
219
220def macroop LLDT_M
221{
222 ld t5, seg, sib, disp, dataSize=2
223 chks t5, t0, InGDTCheck, flags=(EZF,)
224 br label("end"), flags=(CEZF,)
225 limm t4, 0, dataSize=8
226 srli t4, t5, 3, dataSize=2
227 ldst t1, tsg, [8, t4, t0], dataSize=8
228 ld t2, tsg, [8, t4, t0], 8, dataSize=8
229 chks t5, t1, LDTCheck
230 wrdh t3, t1, t2
231 wrdl tr, t1, t5
232 wrbase tr, t3, dataSize=8
233end:
234 fault "NoFault"
235};
236
237def macroop LLDT_P
238{
239 rdip t7
240 ld t5, seg, riprel, disp, dataSize=2
241 chks t5, t0, InGDTCheck, flags=(EZF,)
242 br label("end"), flags=(CEZF,)
243 limm t4, 0, dataSize=8
244 srli t4, t5, 3, dataSize=2
245 ldst t1, tsg, [8, t4, t0], dataSize=8
246 ld t2, tsg, [8, t4, t0], 8, dataSize=8

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