1
2 #ifndef _ASM_S390_NOSPEC_ASM_H
3 #define _ASM_S390_NOSPEC_ASM_H
4
5 #include <asm/alternative-asm.h>
6 #include <asm/asm-offsets.h>
7 #include <asm/dwarf.h>
8
9 #ifdef __ASSEMBLY__
10
11 #ifdef CC_USING_EXPOLINE
12
13 _LC_BR_R1 = __LC_BR_R1
14
15
16
17
18
19
20 .macro __THUNK_PROLOG_NAME name
21 .pushsection .text.\name,"axG",@progbits,\name,comdat
22 .globl \name
23 .hidden \name
24 .type \name,@function
25 \name:
26 CFI_STARTPROC
27 .endm
28
29 .macro __THUNK_EPILOG
30 CFI_ENDPROC
31 .popsection
32 .endm
33
34 .macro __THUNK_PROLOG_BR r1,r2
35 __THUNK_PROLOG_NAME __s390_indirect_jump_r\r2\()use_r\r1
36 .endm
37
38 .macro __THUNK_PROLOG_BC d0,r1,r2
39 __THUNK_PROLOG_NAME __s390_indirect_branch_\d0\()_\r2\()use_\r1
40 .endm
41
42 .macro __THUNK_BR r1,r2
43 jg __s390_indirect_jump_r\r2\()use_r\r1
44 .endm
45
46 .macro __THUNK_BC d0,r1,r2
47 jg __s390_indirect_branch_\d0\()_\r2\()use_\r1
48 .endm
49
50 .macro __THUNK_BRASL r1,r2,r3
51 brasl \r1,__s390_indirect_jump_r\r3\()use_r\r2
52 .endm
53
54 .macro __DECODE_RR expand,reg,ruse
55 .set __decode_fail,1
56 .irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
57 .ifc \reg,%r\r1
58 .irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
59 .ifc \ruse,%r\r2
60 \expand \r1,\r2
61 .set __decode_fail,0
62 .endif
63 .endr
64 .endif
65 .endr
66 .if __decode_fail == 1
67 .error "__DECODE_RR failed"
68 .endif
69 .endm
70
71 .macro __DECODE_RRR expand,rsave,rtarget,ruse
72 .set __decode_fail,1
73 .irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
74 .ifc \rsave,%r\r1
75 .irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
76 .ifc \rtarget,%r\r2
77 .irp r3,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
78 .ifc \ruse,%r\r3
79 \expand \r1,\r2,\r3
80 .set __decode_fail,0
81 .endif
82 .endr
83 .endif
84 .endr
85 .endif
86 .endr
87 .if __decode_fail == 1
88 .error "__DECODE_RRR failed"
89 .endif
90 .endm
91
92 .macro __DECODE_DRR expand,disp,reg,ruse
93 .set __decode_fail,1
94 .irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
95 .ifc \reg,%r\r1
96 .irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
97 .ifc \ruse,%r\r2
98 \expand \disp,\r1,\r2
99 .set __decode_fail,0
100 .endif
101 .endr
102 .endif
103 .endr
104 .if __decode_fail == 1
105 .error "__DECODE_DRR failed"
106 .endif
107 .endm
108
109 .macro __THUNK_EX_BR reg,ruse
110 # Be very careful when adding instructions to this macro!
111 # The ALTERNATIVE replacement code has a .+10 which targets
112 # the "br \reg" after the code has been patched.
113 #ifdef CONFIG_HAVE_MARCH_Z10_FEATURES
114 exrl 0,555f
115 j .
116 #else
117 .ifc \reg,%r1
118 ALTERNATIVE "ex %r0,_LC_BR_R1", ".insn ril,0xc60000000000,0,.+10", 35
119 j .
120 .else
121 larl \ruse,555f
122 ex 0,0(\ruse)
123 j .
124 .endif
125 #endif
126 555: br \reg
127 .endm
128
129 .macro __THUNK_EX_BC disp,reg,ruse
130 #ifdef CONFIG_HAVE_MARCH_Z10_FEATURES
131 exrl 0,556f
132 j .
133 #else
134 larl \ruse,556f
135 ex 0,0(\ruse)
136 j .
137 #endif
138 556: b \disp(\reg)
139 .endm
140
141 .macro GEN_BR_THUNK reg,ruse=%r1
142 __DECODE_RR __THUNK_PROLOG_BR,\reg,\ruse
143 __THUNK_EX_BR \reg,\ruse
144 __THUNK_EPILOG
145 .endm
146
147 .macro GEN_B_THUNK disp,reg,ruse=%r1
148 __DECODE_DRR __THUNK_PROLOG_BC,\disp,\reg,\ruse
149 __THUNK_EX_BC \disp,\reg,\ruse
150 __THUNK_EPILOG
151 .endm
152
153 .macro BR_EX reg,ruse=%r1
154 557: __DECODE_RR __THUNK_BR,\reg,\ruse
155 .pushsection .s390_indirect_branches,"a",@progbits
156 .long 557b-.
157 .popsection
158 .endm
159
160 .macro B_EX disp,reg,ruse=%r1
161 558: __DECODE_DRR __THUNK_BC,\disp,\reg,\ruse
162 .pushsection .s390_indirect_branches,"a",@progbits
163 .long 558b-.
164 .popsection
165 .endm
166
167 .macro BASR_EX rsave,rtarget,ruse=%r1
168 559: __DECODE_RRR __THUNK_BRASL,\rsave,\rtarget,\ruse
169 .pushsection .s390_indirect_branches,"a",@progbits
170 .long 559b-.
171 .popsection
172 .endm
173
174 #else
175 .macro GEN_BR_THUNK reg,ruse=%r1
176 .endm
177
178 .macro GEN_B_THUNK disp,reg,ruse=%r1
179 .endm
180
181 .macro BR_EX reg,ruse=%r1
182 br \reg
183 .endm
184
185 .macro B_EX disp,reg,ruse=%r1
186 b \disp(\reg)
187 .endm
188
189 .macro BASR_EX rsave,rtarget,ruse=%r1
190 basr \rsave,\rtarget
191 .endm
192 #endif
193
194 #endif
195
196 #endif