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uasm.h
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1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License. See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (C) 2004, 2005, 2006, 2008 Thiemo Seufer
7  * Copyright (C) 2005 Maciej W. Rozycki
8  * Copyright (C) 2006 Ralf Baechle ([email protected])
9  * Copyright (C) 2012 MIPS Technologies, Inc.
10  */
11 
12 #include <linux/types.h>
13 
14 #ifdef CONFIG_EXPORT_UASM
15 #include <linux/export.h>
16 #define __uasminit
17 #define __uasminitdata
18 #define UASM_EXPORT_SYMBOL(sym) EXPORT_SYMBOL(sym)
19 #else
20 #define __uasminit __cpuinit
21 #define __uasminitdata __cpuinitdata
22 #define UASM_EXPORT_SYMBOL(sym)
23 #endif
24 
25 #define Ip_u1u2u3(op) \
26 void __uasminit \
27 uasm_i##op(u32 **buf, unsigned int a, unsigned int b, unsigned int c)
28 
29 #define Ip_u2u1u3(op) \
30 void __uasminit \
31 uasm_i##op(u32 **buf, unsigned int a, unsigned int b, unsigned int c)
32 
33 #define Ip_u3u1u2(op) \
34 void __uasminit \
35 uasm_i##op(u32 **buf, unsigned int a, unsigned int b, unsigned int c)
36 
37 #define Ip_u1u2s3(op) \
38 void __uasminit \
39 uasm_i##op(u32 **buf, unsigned int a, unsigned int b, signed int c)
40 
41 #define Ip_u2s3u1(op) \
42 void __uasminit \
43 uasm_i##op(u32 **buf, unsigned int a, signed int b, unsigned int c)
44 
45 #define Ip_u2u1s3(op) \
46 void __uasminit \
47 uasm_i##op(u32 **buf, unsigned int a, unsigned int b, signed int c)
48 
49 #define Ip_u2u1msbu3(op) \
50 void __uasminit \
51 uasm_i##op(u32 **buf, unsigned int a, unsigned int b, unsigned int c, \
52  unsigned int d)
53 
54 #define Ip_u1u2(op) \
55 void __uasminit uasm_i##op(u32 **buf, unsigned int a, unsigned int b)
56 
57 #define Ip_u1s2(op) \
58 void __uasminit uasm_i##op(u32 **buf, unsigned int a, signed int b)
59 
60 #define Ip_u1(op) void __uasminit uasm_i##op(u32 **buf, unsigned int a)
61 
62 #define Ip_0(op) void __uasminit uasm_i##op(u32 **buf)
63 
64 Ip_u2u1s3(_addiu);
65 Ip_u3u1u2(_addu);
66 Ip_u3u1u2(_and);
67 Ip_u2u1u3(_andi);
68 Ip_u1u2s3(_bbit0);
69 Ip_u1u2s3(_bbit1);
70 Ip_u1u2s3(_beq);
71 Ip_u1u2s3(_beql);
72 Ip_u1s2(_bgez);
73 Ip_u1s2(_bgezl);
74 Ip_u1s2(_bltz);
75 Ip_u1s2(_bltzl);
76 Ip_u1u2s3(_bne);
77 Ip_u2s3u1(_cache);
78 Ip_u2u1s3(_daddiu);
79 Ip_u3u1u2(_daddu);
80 Ip_u2u1msbu3(_dins);
81 Ip_u2u1msbu3(_dinsm);
82 Ip_u1u2u3(_dmfc0);
83 Ip_u1u2u3(_dmtc0);
84 Ip_u2u1u3(_drotr);
85 Ip_u2u1u3(_drotr32);
86 Ip_u2u1u3(_dsll);
87 Ip_u2u1u3(_dsll32);
88 Ip_u2u1u3(_dsra);
89 Ip_u2u1u3(_dsrl);
90 Ip_u2u1u3(_dsrl32);
91 Ip_u3u1u2(_dsubu);
92 Ip_0(_eret);
93 Ip_u2u1msbu3(_ext);
94 Ip_u2u1msbu3(_ins);
95 Ip_u1(_j);
96 Ip_u1(_jal);
97 Ip_u1(_jr);
98 Ip_u2s3u1(_ld);
99 Ip_u3u1u2(_ldx);
100 Ip_u2s3u1(_ll);
101 Ip_u2s3u1(_lld);
102 Ip_u1s2(_lui);
103 Ip_u2s3u1(_lw);
104 Ip_u3u1u2(_lwx);
105 Ip_u1u2u3(_mfc0);
106 Ip_u1u2u3(_mtc0);
107 Ip_u3u1u2(_or);
108 Ip_u2u1u3(_ori);
109 Ip_u2s3u1(_pref);
110 Ip_0(_rfe);
111 Ip_u2u1u3(_rotr);
112 Ip_u2s3u1(_sc);
113 Ip_u2s3u1(_scd);
114 Ip_u2s3u1(_sd);
115 Ip_u2u1u3(_sll);
116 Ip_u2u1u3(_sra);
117 Ip_u2u1u3(_srl);
118 Ip_u3u1u2(_subu);
119 Ip_u2s3u1(_sw);
120 Ip_u1(_syscall);
121 Ip_0(_tlbp);
122 Ip_0(_tlbr);
123 Ip_0(_tlbwi);
124 Ip_0(_tlbwr);
125 Ip_u3u1u2(_xor);
126 Ip_u2u1u3(_xori);
127 
128 
129 /* Handle labels. */
130 struct uasm_label {
131  u32 *addr;
132  int lab;
133 };
134 
135 void __uasminit uasm_build_label(struct uasm_label **lab, u32 *addr, int lid);
136 #ifdef CONFIG_64BIT
137 int uasm_in_compat_space_p(long addr);
138 #endif
139 int uasm_rel_hi(long val);
140 int uasm_rel_lo(long val);
141 void UASM_i_LA_mostly(u32 **buf, unsigned int rs, long addr);
142 void UASM_i_LA(u32 **buf, unsigned int rs, long addr);
143 
144 #define UASM_L_LA(lb) \
145 static inline void __uasminit uasm_l##lb(struct uasm_label **lab, u32 *addr) \
146 { \
147  uasm_build_label(lab, addr, label##lb); \
148 }
149 
150 /* convenience macros for instructions */
151 #ifdef CONFIG_64BIT
152 # define UASM_i_ADDIU(buf, rs, rt, val) uasm_i_daddiu(buf, rs, rt, val)
153 # define UASM_i_ADDU(buf, rs, rt, rd) uasm_i_daddu(buf, rs, rt, rd)
154 # define UASM_i_LL(buf, rs, rt, off) uasm_i_lld(buf, rs, rt, off)
155 # define UASM_i_LW(buf, rs, rt, off) uasm_i_ld(buf, rs, rt, off)
156 # define UASM_i_LWX(buf, rs, rt, rd) uasm_i_ldx(buf, rs, rt, rd)
157 # define UASM_i_MFC0(buf, rt, rd...) uasm_i_dmfc0(buf, rt, rd)
158 # define UASM_i_MTC0(buf, rt, rd...) uasm_i_dmtc0(buf, rt, rd)
159 # define UASM_i_ROTR(buf, rs, rt, sh) uasm_i_drotr(buf, rs, rt, sh)
160 # define UASM_i_SC(buf, rs, rt, off) uasm_i_scd(buf, rs, rt, off)
161 # define UASM_i_SLL(buf, rs, rt, sh) uasm_i_dsll(buf, rs, rt, sh)
162 # define UASM_i_SRA(buf, rs, rt, sh) uasm_i_dsra(buf, rs, rt, sh)
163 # define UASM_i_SRL(buf, rs, rt, sh) uasm_i_dsrl(buf, rs, rt, sh)
164 # define UASM_i_SRL_SAFE(buf, rs, rt, sh) uasm_i_dsrl_safe(buf, rs, rt, sh)
165 # define UASM_i_SUBU(buf, rs, rt, rd) uasm_i_dsubu(buf, rs, rt, rd)
166 # define UASM_i_SW(buf, rs, rt, off) uasm_i_sd(buf, rs, rt, off)
167 #else
168 # define UASM_i_ADDIU(buf, rs, rt, val) uasm_i_addiu(buf, rs, rt, val)
169 # define UASM_i_ADDU(buf, rs, rt, rd) uasm_i_addu(buf, rs, rt, rd)
170 # define UASM_i_LL(buf, rs, rt, off) uasm_i_ll(buf, rs, rt, off)
171 # define UASM_i_LW(buf, rs, rt, off) uasm_i_lw(buf, rs, rt, off)
172 # define UASM_i_LWX(buf, rs, rt, rd) uasm_i_lwx(buf, rs, rt, rd)
173 # define UASM_i_MFC0(buf, rt, rd...) uasm_i_mfc0(buf, rt, rd)
174 # define UASM_i_MTC0(buf, rt, rd...) uasm_i_mtc0(buf, rt, rd)
175 # define UASM_i_ROTR(buf, rs, rt, sh) uasm_i_rotr(buf, rs, rt, sh)
176 # define UASM_i_SC(buf, rs, rt, off) uasm_i_sc(buf, rs, rt, off)
177 # define UASM_i_SLL(buf, rs, rt, sh) uasm_i_sll(buf, rs, rt, sh)
178 # define UASM_i_SRA(buf, rs, rt, sh) uasm_i_sra(buf, rs, rt, sh)
179 # define UASM_i_SRL(buf, rs, rt, sh) uasm_i_srl(buf, rs, rt, sh)
180 # define UASM_i_SRL_SAFE(buf, rs, rt, sh) uasm_i_srl(buf, rs, rt, sh)
181 # define UASM_i_SUBU(buf, rs, rt, rd) uasm_i_subu(buf, rs, rt, rd)
182 # define UASM_i_SW(buf, rs, rt, off) uasm_i_sw(buf, rs, rt, off)
183 #endif
184 
185 #define uasm_i_b(buf, off) uasm_i_beq(buf, 0, 0, off)
186 #define uasm_i_beqz(buf, rs, off) uasm_i_beq(buf, rs, 0, off)
187 #define uasm_i_beqzl(buf, rs, off) uasm_i_beql(buf, rs, 0, off)
188 #define uasm_i_bnez(buf, rs, off) uasm_i_bne(buf, rs, 0, off)
189 #define uasm_i_bnezl(buf, rs, off) uasm_i_bnel(buf, rs, 0, off)
190 #define uasm_i_ehb(buf) uasm_i_sll(buf, 0, 0, 3)
191 #define uasm_i_move(buf, a, b) UASM_i_ADDU(buf, a, 0, b)
192 #define uasm_i_nop(buf) uasm_i_sll(buf, 0, 0, 0)
193 #define uasm_i_ssnop(buf) uasm_i_sll(buf, 0, 0, 1)
194 
195 static inline void uasm_i_drotr_safe(u32 **p, unsigned int a1,
196  unsigned int a2, unsigned int a3)
197 {
198  if (a3 < 32)
199  uasm_i_drotr(p, a1, a2, a3);
200  else
201  uasm_i_drotr32(p, a1, a2, a3 - 32);
202 }
203 
204 static inline void uasm_i_dsll_safe(u32 **p, unsigned int a1,
205  unsigned int a2, unsigned int a3)
206 {
207  if (a3 < 32)
208  uasm_i_dsll(p, a1, a2, a3);
209  else
210  uasm_i_dsll32(p, a1, a2, a3 - 32);
211 }
212 
213 static inline void uasm_i_dsrl_safe(u32 **p, unsigned int a1,
214  unsigned int a2, unsigned int a3)
215 {
216  if (a3 < 32)
217  uasm_i_dsrl(p, a1, a2, a3);
218  else
219  uasm_i_dsrl32(p, a1, a2, a3 - 32);
220 }
221 
222 /* Handle relocations. */
223 struct uasm_reloc {
224  u32 *addr;
225  unsigned int type;
226  int lab;
227 };
228 
229 /* This is zero so we can use zeroed label arrays. */
230 #define UASM_LABEL_INVALID 0
231 
232 void uasm_r_mips_pc16(struct uasm_reloc **rel, u32 *addr, int lid);
233 void uasm_resolve_relocs(struct uasm_reloc *rel, struct uasm_label *lab);
234 void uasm_move_relocs(struct uasm_reloc *rel, u32 *first, u32 *end, long off);
235 void uasm_move_labels(struct uasm_label *lab, u32 *first, u32 *end, long off);
236 void uasm_copy_handler(struct uasm_reloc *rel, struct uasm_label *lab,
237  u32 *first, u32 *end, u32 *target);
238 int uasm_insn_has_bdelay(struct uasm_reloc *rel, u32 *addr);
239 
240 /* Convenience functions for labeled branches. */
241 void uasm_il_b(u32 **p, struct uasm_reloc **r, int lid);
242 void uasm_il_bbit0(u32 **p, struct uasm_reloc **r, unsigned int reg,
243  unsigned int bit, int lid);
244 void uasm_il_bbit1(u32 **p, struct uasm_reloc **r, unsigned int reg,
245  unsigned int bit, int lid);
246 void uasm_il_beqz(u32 **p, struct uasm_reloc **r, unsigned int reg, int lid);
247 void uasm_il_beqzl(u32 **p, struct uasm_reloc **r, unsigned int reg, int lid);
248 void uasm_il_bgezl(u32 **p, struct uasm_reloc **r, unsigned int reg, int lid);
249 void uasm_il_bgez(u32 **p, struct uasm_reloc **r, unsigned int reg, int lid);
250 void uasm_il_bltz(u32 **p, struct uasm_reloc **r, unsigned int reg, int lid);
251 void uasm_il_bne(u32 **p, struct uasm_reloc **r, unsigned int reg1,
252  unsigned int reg2, int lid);
253 void uasm_il_bnez(u32 **p, struct uasm_reloc **r, unsigned int reg, int lid);
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