1 /*
2 * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
3 * reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the NetLogic
9 * license below:
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 *
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in
19 * the documentation and/or other materials provided with the
20 * distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
29 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
31 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
32 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #ifndef _ASM_NLM_MIPS_EXTS_H
36 #define _ASM_NLM_MIPS_EXTS_H
37
38 /*
39 * XLR and XLP interrupt request and interrupt mask registers
40 */
41 /*
42 * NOTE: Do not save/restore flags around write_c0_eimr().
43 * On non-R2 platforms the flags has part of EIMR that is shadowed in STATUS
44 * register. Restoring flags will overwrite the lower 8 bits of EIMR.
45 *
46 * Call with interrupts disabled.
47 */
48 #define write_c0_eimr(val) \
49 do { \
50 if (sizeof(unsigned long) == 4) { \
51 __asm__ __volatile__( \
52 ".set\tmips64\n\t" \
53 "dsll\t%L0, %L0, 32\n\t" \
54 "dsrl\t%L0, %L0, 32\n\t" \
55 "dsll\t%M0, %M0, 32\n\t" \
56 "or\t%L0, %L0, %M0\n\t" \
57 "dmtc0\t%L0, $9, 7\n\t" \
58 ".set\tmips0" \
59 : : "r" (val)); \
60 } else \
61 __write_64bit_c0_register($9, 7, (val)); \
62 } while (0)
63
64 /*
65 * Handling the 64 bit EIMR and EIRR registers in 32-bit mode with
66 * standard functions will be very inefficient. This provides
67 * optimized functions for the normal operations on the registers.
68 *
69 * Call with interrupts disabled.
70 */
71 static inline void ack_c0_eirr(int irq)
72 {
73 __asm__ __volatile__(
74 ".set push\n\t"
75 ".set mips64\n\t"
76 ".set noat\n\t"
77 "li $1, 1\n\t"
78 "dsllv $1, $1, %0\n\t"
79 "dmtc0 $1, $9, 6\n\t"
80 ".set pop"
81 : : "r" (irq));
82 }
83
84 static inline void set_c0_eimr(int irq)
85 {
86 __asm__ __volatile__(
87 ".set push\n\t"
88 ".set mips64\n\t"
89 ".set noat\n\t"
90 "li $1, 1\n\t"
91 "dsllv %0, $1, %0\n\t"
92 "dmfc0 $1, $9, 7\n\t"
93 "or $1, %0\n\t"
94 "dmtc0 $1, $9, 7\n\t"
95 ".set pop"
96 : "+r" (irq));
97 }
98
99 static inline void clear_c0_eimr(int irq)
100 {
101 __asm__ __volatile__(
102 ".set push\n\t"
103 ".set mips64\n\t"
104 ".set noat\n\t"
105 "li $1, 1\n\t"
106 "dsllv %0, $1, %0\n\t"
107 "dmfc0 $1, $9, 7\n\t"
108 "or $1, %0\n\t"
109 "xor $1, %0\n\t"
110 "dmtc0 $1, $9, 7\n\t"
111 ".set pop"
112 : "+r" (irq));
113 }
114
115 /*
116 * Read c0 eimr and c0 eirr, do AND of the two values, the result is
117 * the interrupts which are raised and are not masked.
118 */
119 static inline uint64_t read_c0_eirr_and_eimr(void)
120 {
121 uint64_t val;
122
123 #ifdef CONFIG_64BIT
124 val = __read_64bit_c0_register($9, 6) & __read_64bit_c0_register($9, 7);
125 #else
126 __asm__ __volatile__(
127 ".set push\n\t"
128 ".set mips64\n\t"
129 ".set noat\n\t"
130 "dmfc0 %M0, $9, 6\n\t"
131 "dmfc0 %L0, $9, 7\n\t"
132 "and %M0, %L0\n\t"
133 "dsll %L0, %M0, 32\n\t"
134 "dsra %M0, %M0, 32\n\t"
135 "dsra %L0, %L0, 32\n\t"
136 ".set pop"
137 : "=r" (val));
138 #endif
139 return val;
140 }
141
142 static inline int hard_smp_processor_id(void)
143 {
144 return __read_32bit_c0_register($15, 1) & 0x3ff;
145 }
146
147 static inline int nlm_nodeid(void)
148 {
149 uint32_t prid = read_c0_prid() & PRID_IMP_MASK;
150
151 if ((prid == PRID_IMP_NETLOGIC_XLP9XX) ||
152 (prid == PRID_IMP_NETLOGIC_XLP5XX))
153 return (__read_32bit_c0_register($15, 1) >> 7) & 0x7;
154 else
155 return (__read_32bit_c0_register($15, 1) >> 5) & 0x3;
156 }
157
158 static inline unsigned int nlm_core_id(void)
159 {
160 uint32_t prid = read_c0_prid() & PRID_IMP_MASK;
161
162 if ((prid == PRID_IMP_NETLOGIC_XLP9XX) ||
163 (prid == PRID_IMP_NETLOGIC_XLP5XX))
164 return (read_c0_ebase() & 0x7c) >> 2;
165 else
166 return (read_c0_ebase() & 0x1c) >> 2;
167 }
168
169 static inline unsigned int nlm_thread_id(void)
170 {
171 return read_c0_ebase() & 0x3;
172 }
173
174 #define __read_64bit_c2_split(source, sel) \
175 ({ \
176 unsigned long long __val; \
177 unsigned long __flags; \
178 \
179 local_irq_save(__flags); \
180 if (sel == 0) \
181 __asm__ __volatile__( \
182 ".set\tmips64\n\t" \
183 "dmfc2\t%M0, " #source "\n\t" \
184 "dsll\t%L0, %M0, 32\n\t" \
185 "dsra\t%M0, %M0, 32\n\t" \
186 "dsra\t%L0, %L0, 32\n\t" \
187 ".set\tmips0\n\t" \
188 : "=r" (__val)); \
189 else \
190 __asm__ __volatile__( \
191 ".set\tmips64\n\t" \
192 "dmfc2\t%M0, " #source ", " #sel "\n\t" \
193 "dsll\t%L0, %M0, 32\n\t" \
194 "dsra\t%M0, %M0, 32\n\t" \
195 "dsra\t%L0, %L0, 32\n\t" \
196 ".set\tmips0\n\t" \
197 : "=r" (__val)); \
198 local_irq_restore(__flags); \
199 \
200 __val; \
201 })
202
203 #define __write_64bit_c2_split(source, sel, val) \
204 do { \
205 unsigned long __flags; \
206 \
207 local_irq_save(__flags); \
208 if (sel == 0) \
209 __asm__ __volatile__( \
210 ".set\tmips64\n\t" \
211 "dsll\t%L0, %L0, 32\n\t" \
212 "dsrl\t%L0, %L0, 32\n\t" \
213 "dsll\t%M0, %M0, 32\n\t" \
214 "or\t%L0, %L0, %M0\n\t" \
215 "dmtc2\t%L0, " #source "\n\t" \
216 ".set\tmips0\n\t" \
217 : : "r" (val)); \
218 else \
219 __asm__ __volatile__( \
220 ".set\tmips64\n\t" \
221 "dsll\t%L0, %L0, 32\n\t" \
222 "dsrl\t%L0, %L0, 32\n\t" \
223 "dsll\t%M0, %M0, 32\n\t" \
224 "or\t%L0, %L0, %M0\n\t" \
225 "dmtc2\t%L0, " #source ", " #sel "\n\t" \
226 ".set\tmips0\n\t" \
227 : : "r" (val)); \
228 local_irq_restore(__flags); \
229 } while (0)
230
231 #define __read_32bit_c2_register(source, sel) \
232 ({ uint32_t __res; \
233 if (sel == 0) \
234 __asm__ __volatile__( \
235 ".set\tmips32\n\t" \
236 "mfc2\t%0, " #source "\n\t" \
237 ".set\tmips0\n\t" \
238 : "=r" (__res)); \
239 else \
240 __asm__ __volatile__( \
241 ".set\tmips32\n\t" \
242 "mfc2\t%0, " #source ", " #sel "\n\t" \
243 ".set\tmips0\n\t" \
244 : "=r" (__res)); \
245 __res; \
246 })
247
248 #define __read_64bit_c2_register(source, sel) \
249 ({ unsigned long long __res; \
250 if (sizeof(unsigned long) == 4) \
251 __res = __read_64bit_c2_split(source, sel); \
252 else if (sel == 0) \
253 __asm__ __volatile__( \
254 ".set\tmips64\n\t" \
255 "dmfc2\t%0, " #source "\n\t" \
256 ".set\tmips0\n\t" \
257 : "=r" (__res)); \
258 else \
259 __asm__ __volatile__( \
260 ".set\tmips64\n\t" \
261 "dmfc2\t%0, " #source ", " #sel "\n\t" \
262 ".set\tmips0\n\t" \
263 : "=r" (__res)); \
264 __res; \
265 })
266
267 #define __write_64bit_c2_register(register, sel, value) \
268 do { \
269 if (sizeof(unsigned long) == 4) \
270 __write_64bit_c2_split(register, sel, value); \
271 else if (sel == 0) \
272 __asm__ __volatile__( \
273 ".set\tmips64\n\t" \
274 "dmtc2\t%z0, " #register "\n\t" \
275 ".set\tmips0\n\t" \
276 : : "Jr" (value)); \
277 else \
278 __asm__ __volatile__( \
279 ".set\tmips64\n\t" \
280 "dmtc2\t%z0, " #register ", " #sel "\n\t" \
281 ".set\tmips0\n\t" \
282 : : "Jr" (value)); \
283 } while (0)
284
285 #define __write_32bit_c2_register(reg, sel, value) \
286 ({ \
287 if (sel == 0) \
288 __asm__ __volatile__( \
289 ".set\tmips32\n\t" \
290 "mtc2\t%z0, " #reg "\n\t" \
291 ".set\tmips0\n\t" \
292 : : "Jr" (value)); \
293 else \
294 __asm__ __volatile__( \
295 ".set\tmips32\n\t" \
296 "mtc2\t%z0, " #reg ", " #sel "\n\t" \
297 ".set\tmips0\n\t" \
298 : : "Jr" (value)); \
299 })
300
301 #endif /*_ASM_NLM_MIPS_EXTS_H */