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gerrit-public.fairphone.software / kernel / msm-4.9 / e6236f781cc7777a2e74d256c478bb07496f35ec / . / arch / ia64 / include / asm / native / pvchk_inst.h
blob: 8d72962ec8383b8d77ba65c4cbdaa4aec271518c [file] [log] [blame]
Isaku Yamahataf8d1f992008-10-17 11:18:13 +0900[diff] [blame]1#ifndef _ASM_NATIVE_PVCHK_INST_H
2#define _ASM_NATIVE_PVCHK_INST_H
3
4/******************************************************************************
5 * arch/ia64/include/asm/native/pvchk_inst.h
6 * Checker for paravirtualizations of privileged operations.
7 *
8 * Copyright (C) 2005 Hewlett-Packard Co
9 * Dan Magenheimer <dan.magenheimer@hp.com>
10 *
11 * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
12 * VA Linux Systems Japan K.K.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 *
28 */
29
30/**********************************************
31 * Instructions paravirtualized for correctness
32 **********************************************/
33
34/* "fc" and "thash" are privilege-sensitive instructions, meaning they
35 * may have different semantics depending on whether they are executed
36 * at PL0 vs PL!=0. When paravirtualized, these instructions mustn't
37 * be allowed to execute directly, lest incorrect semantics result.
38 */
39
40#define fc .error "fc should not be used directly."
41#define thash .error "thash should not be used directly."
42
43/* Note that "ttag" and "cover" are also privilege-sensitive; "ttag"
44 * is not currently used (though it may be in a long-format VHPT system!)
45 * and the semantics of cover only change if psr.ic is off which is very
46 * rare (and currently non-existent outside of assembly code
47 */
48#define ttag .error "ttag should not be used directly."
49#define cover .error "cover should not be used directly."
50
51/* There are also privilege-sensitive registers. These registers are
52 * readable at any privilege level but only writable at PL0.
53 */
54#define cpuid .error "cpuid should not be used directly."
55#define pmd .error "pmd should not be used directly."
56
57/*
58 * mov ar.eflag =
59 * mov = ar.eflag
60 */
61
62/**********************************************
63 * Instructions paravirtualized for performance
64 **********************************************/
65/*
66 * Those instructions include '.' which can't be handled by cpp.
67 * or can't be handled by cpp easily.
68 * They are handled by sed instead of cpp.
69 */
70
71/* for .S
72 * itc.i
73 * itc.d
74 *
75 * bsw.0
76 * bsw.1
77 *
78 * ssm psr.ic | PSR_DEFAULT_BITS
79 * ssm psr.ic
80 * rsm psr.ic
81 * ssm psr.i
82 * rsm psr.i
83 * rsm psr.i | psr.ic
84 * rsm psr.dt
85 * ssm psr.dt
86 *
87 * mov = cr.ifa
88 * mov = cr.itir
89 * mov = cr.isr
90 * mov = cr.iha
91 * mov = cr.ipsr
92 * mov = cr.iim
93 * mov = cr.iip
94 * mov = cr.ivr
95 * mov = psr
96 *
97 * mov cr.ifa =
98 * mov cr.itir =
99 * mov cr.iha =
100 * mov cr.ipsr =
101 * mov cr.ifs =
102 * mov cr.iip =
103 * mov cr.kr =
104 */
105
106/* for intrinsics
107 * ssm psr.i
108 * rsm psr.i
109 * mov = psr
110 * mov = ivr
111 * mov = tpr
112 * mov cr.itm =
113 * mov eoi =
114 * mov rr[] =
115 * mov = rr[]
116 * mov = kr
117 * mov kr =
118 * ptc.ga
119 */
120
121/*************************************************************
122 * define paravirtualized instrcution macros as nop to ingore.
123 * and check whether arguments are appropriate.
124 *************************************************************/
125
126/* check whether reg is a regular register */
127.macro is_rreg_in reg
128 .ifc "\reg", "r0"
129 nop 0
130 .exitm
131 .endif
132 ;;
133 mov \reg = r0
134 ;;
135.endm
136#define IS_RREG_IN(reg) is_rreg_in reg ;
137
138#define IS_RREG_OUT(reg) \
139 ;; \
140 mov reg = r0 \
141 ;;
142
143#define IS_RREG_CLOB(reg) IS_RREG_OUT(reg)
144
145/* check whether pred is a predicate register */
146#define IS_PRED_IN(pred) \
147 ;; \
148 (pred) nop 0 \
149 ;;
150
151#define IS_PRED_OUT(pred) \
152 ;; \
153 cmp.eq pred, p0 = r0, r0 \
154 ;;
155
156#define IS_PRED_CLOB(pred) IS_PRED_OUT(pred)
157
158
159#define DO_SAVE_MIN(__COVER, SAVE_IFS, EXTRA, WORKAROUND) \
160 nop 0
161#define MOV_FROM_IFA(reg) \
162 IS_RREG_OUT(reg)
163#define MOV_FROM_ITIR(reg) \
164 IS_RREG_OUT(reg)
165#define MOV_FROM_ISR(reg) \
166 IS_RREG_OUT(reg)
167#define MOV_FROM_IHA(reg) \
168 IS_RREG_OUT(reg)
169#define MOV_FROM_IPSR(pred, reg) \
170 IS_PRED_IN(pred) \
171 IS_RREG_OUT(reg)
172#define MOV_FROM_IIM(reg) \
173 IS_RREG_OUT(reg)
174#define MOV_FROM_IIP(reg) \
175 IS_RREG_OUT(reg)
176#define MOV_FROM_IVR(reg, clob) \
177 IS_RREG_OUT(reg) \
178 IS_RREG_CLOB(clob)
179#define MOV_FROM_PSR(pred, reg, clob) \
180 IS_PRED_IN(pred) \
181 IS_RREG_OUT(reg) \
182 IS_RREG_CLOB(clob)
Isaku Yamahata9d1964f2009-03-04 21:05:37 +0900[diff] [blame]183#define MOV_FROM_ITC(pred, pred_clob, reg, clob) \
184 IS_PRED_IN(pred) \
185 IS_PRED_CLOB(pred_clob) \
186 IS_RREG_OUT(reg) \
187 IS_RREG_CLOB(clob)
Isaku Yamahataf8d1f992008-10-17 11:18:13 +0900[diff] [blame]188#define MOV_TO_IFA(reg, clob) \
189 IS_RREG_IN(reg) \
190 IS_RREG_CLOB(clob)
191#define MOV_TO_ITIR(pred, reg, clob) \
192 IS_PRED_IN(pred) \
193 IS_RREG_IN(reg) \
194 IS_RREG_CLOB(clob)
195#define MOV_TO_IHA(pred, reg, clob) \
196 IS_PRED_IN(pred) \
197 IS_RREG_IN(reg) \
198 IS_RREG_CLOB(clob)
199#define MOV_TO_IPSR(pred, reg, clob) \
200 IS_PRED_IN(pred) \
201 IS_RREG_IN(reg) \
202 IS_RREG_CLOB(clob)
203#define MOV_TO_IFS(pred, reg, clob) \
204 IS_PRED_IN(pred) \
205 IS_RREG_IN(reg) \
206 IS_RREG_CLOB(clob)
207#define MOV_TO_IIP(reg, clob) \
208 IS_RREG_IN(reg) \
209 IS_RREG_CLOB(clob)
210#define MOV_TO_KR(kr, reg, clob0, clob1) \
211 IS_RREG_IN(reg) \
212 IS_RREG_CLOB(clob0) \
213 IS_RREG_CLOB(clob1)
214#define ITC_I(pred, reg, clob) \
215 IS_PRED_IN(pred) \
216 IS_RREG_IN(reg) \
217 IS_RREG_CLOB(clob)
218#define ITC_D(pred, reg, clob) \
219 IS_PRED_IN(pred) \
220 IS_RREG_IN(reg) \
221 IS_RREG_CLOB(clob)
222#define ITC_I_AND_D(pred_i, pred_d, reg, clob) \
223 IS_PRED_IN(pred_i) \
224 IS_PRED_IN(pred_d) \
225 IS_RREG_IN(reg) \
226 IS_RREG_CLOB(clob)
227#define THASH(pred, reg0, reg1, clob) \
228 IS_PRED_IN(pred) \
229 IS_RREG_OUT(reg0) \
230 IS_RREG_IN(reg1) \
231 IS_RREG_CLOB(clob)
232#define SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(clob0, clob1) \
233 IS_RREG_CLOB(clob0) \
234 IS_RREG_CLOB(clob1)
235#define SSM_PSR_IC_AND_SRLZ_D(clob0, clob1) \
236 IS_RREG_CLOB(clob0) \
237 IS_RREG_CLOB(clob1)
238#define RSM_PSR_IC(clob) \
239 IS_RREG_CLOB(clob)
240#define SSM_PSR_I(pred, pred_clob, clob) \
241 IS_PRED_IN(pred) \
242 IS_PRED_CLOB(pred_clob) \
243 IS_RREG_CLOB(clob)
244#define RSM_PSR_I(pred, clob0, clob1) \
245 IS_PRED_IN(pred) \
246 IS_RREG_CLOB(clob0) \
247 IS_RREG_CLOB(clob1)
248#define RSM_PSR_I_IC(clob0, clob1, clob2) \
249 IS_RREG_CLOB(clob0) \
250 IS_RREG_CLOB(clob1) \
251 IS_RREG_CLOB(clob2)
252#define RSM_PSR_DT \
253 nop 0
Isaku Yamahatac4312512009-03-04 21:05:45 +0900[diff] [blame]254#define RSM_PSR_BE_I(clob0, clob1) \
255 IS_RREG_CLOB(clob0) \
256 IS_RREG_CLOB(clob1)
Isaku Yamahataf8d1f992008-10-17 11:18:13 +0900[diff] [blame]257#define SSM_PSR_DT_AND_SRLZ_I \
258 nop 0
259#define BSW_0(clob0, clob1, clob2) \
260 IS_RREG_CLOB(clob0) \
261 IS_RREG_CLOB(clob1) \
262 IS_RREG_CLOB(clob2)
263#define BSW_1(clob0, clob1) \
264 IS_RREG_CLOB(clob0) \
265 IS_RREG_CLOB(clob1)
266#define COVER \
267 nop 0
268#define RFI \
269 br.ret.sptk.many rp /* defining nop causes dependency error */
270
271#endif /* _ASM_NATIVE_PVCHK_INST_H */