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ck_pr.h @ 3becda1

55-freebsd-126-freebsd-12

Last change on this file since 3becda1 was bcdce02, checked in by Sebastian Huber <sebastian.huber@…>, on 08/21/18 at 11:47:02

Update to FreeBSD head 2018-06-01

Git mirror commit fb63610a69b0eb7f69a201ba05c4c1a7a2739cf9.

Update #3472.

Property mode set to 100644

File size: 8.6 KB

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1	/*
2	* Copyright 2009-2015 Samy Al Bahra.
3	* Copyright 2012 JoÃ£o Fernandes.
4	* All rights reserved.
5	*
6	* Redistribution and use in source and binary forms, with or without
7	* modification, are permitted provided that the following conditions
8	* are met:
9	* 1. Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.
11	* 2. Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.
14	*
15	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25	* SUCH DAMAGE.
26	*/
27
28	#ifndef CK_PR_PPC_H
29	#define CK_PR_PPC_H
30
31	#ifndef CK_PR_H
32	#error Do not include this file directly, use ck_pr.h
33	#endif
34
35	#include <ck_cc.h>
36	#include <ck_md.h>
37
38	/*
39	* The following represent supported atomic operations.
40	* These operations may be emulated.
41	*/
42	#include "ck_f_pr.h"
43
44	/*
45	* Minimum interface requirement met.
46	*/
47	#define CK_F_PR
48
49	/*
50	* This bounces the hardware thread from low to medium
51	* priority. I am unsure of the benefits of this approach
52	* but it is used by the Linux kernel.
53	*/
54	CK_CC_INLINE static void
55	ck_pr_stall(void)
56	{
57
58	__asm__ __volatile__("or 1, 1, 1;"
59	"or 2, 2, 2;" ::: "memory");
60	return;
61	}
62
63	#define CK_PR_FENCE(T, I) \
64	CK_CC_INLINE static void \
65	ck_pr_fence_strict_##T(void) \
66	{ \
67	__asm__ __volatile__(I ::: "memory"); \
68	}
69
70	CK_PR_FENCE(atomic, "lwsync")
71	CK_PR_FENCE(atomic_store, "lwsync")
72	CK_PR_FENCE(atomic_load, "sync")
73	CK_PR_FENCE(store_atomic, "lwsync")
74	CK_PR_FENCE(load_atomic, "lwsync")
75	CK_PR_FENCE(store, "lwsync")
76	CK_PR_FENCE(store_load, "sync")
77	CK_PR_FENCE(load, "lwsync")
78	CK_PR_FENCE(load_store, "lwsync")
79	CK_PR_FENCE(memory, "sync")
80	CK_PR_FENCE(acquire, "lwsync")
81	CK_PR_FENCE(release, "lwsync")
82	CK_PR_FENCE(acqrel, "lwsync")
83	CK_PR_FENCE(lock, "lwsync")
84	CK_PR_FENCE(unlock, "lwsync")
85
86	#undef CK_PR_FENCE
87
88	#define CK_PR_LOAD(S, M, T, C, I) \
89	CK_CC_INLINE static T \
90	ck_pr_md_load_##S(const M *target) \
91	{ \
92	T r; \
93	__asm__ __volatile__(I "%U1%X1 %0, %1" \
94	: "=r" (r) \
95	: "m" ((const C )target) \
96	: "memory"); \
97	return (r); \
98	}
99
100	CK_PR_LOAD(ptr, void, void *, uint32_t, "lwz")
101
102	#define CK_PR_LOAD_S(S, T, I) CK_PR_LOAD(S, T, T, T, I)
103
104	CK_PR_LOAD_S(32, uint32_t, "lwz")
105	CK_PR_LOAD_S(16, uint16_t, "lhz")
106	CK_PR_LOAD_S(8, uint8_t, "lbz")
107	CK_PR_LOAD_S(uint, unsigned int, "lwz")
108	CK_PR_LOAD_S(int, int, "lwz")
109	CK_PR_LOAD_S(short, short, "lhz")
110	CK_PR_LOAD_S(char, char, "lbz")
111
112	#undef CK_PR_LOAD_S
113	#undef CK_PR_LOAD
114
115	#define CK_PR_STORE(S, M, T, C, I) \
116	CK_CC_INLINE static void \
117	ck_pr_md_store_##S(M *target, T v) \
118	{ \
119	__asm__ __volatile__(I "%U0%X0 %1, %0" \
120	: "=m" ((C )target) \
121	: "r" (v) \
122	: "memory"); \
123	return; \
124	}
125
126	CK_PR_STORE(ptr, void, const void *, uint32_t, "stw")
127
128	#define CK_PR_STORE_S(S, T, I) CK_PR_STORE(S, T, T, T, I)
129
130	CK_PR_STORE_S(32, uint32_t, "stw")
131	CK_PR_STORE_S(16, uint16_t, "sth")
132	CK_PR_STORE_S(8, uint8_t, "stb")
133	CK_PR_STORE_S(uint, unsigned int, "stw")
134	CK_PR_STORE_S(int, int, "stw")
135	CK_PR_STORE_S(short, short, "sth")
136	CK_PR_STORE_S(char, char, "stb")
137
138	#undef CK_PR_STORE_S
139	#undef CK_PR_STORE
140
141	#define CK_PR_CAS(N, T, M) \
142	CK_CC_INLINE static bool \
143	ck_pr_cas_##N##_value(M target, T compare, T set, M value) \
144	{ \
145	T previous; \
146	__asm__ __volatile__("1:" \
147	"lwarx %0, 0, %1;" \
148	"cmpw 0, %0, %3;" \
149	"bne- 2f;" \
150	"stwcx. %2, 0, %1;" \
151	"bne- 1b;" \
152	"2:" \
153	: "=&r" (previous) \
154	: "r" (target), \
155	"r" (set), \
156	"r" (compare) \
157	: "memory", "cc"); \
158	(T )value = previous; \
159	return (previous == compare); \
160	} \
161	CK_CC_INLINE static bool \
162	ck_pr_cas_##N(M *target, T compare, T set) \
163	{ \
164	T previous; \
165	__asm__ __volatile__("1:" \
166	"lwarx %0, 0, %1;" \
167	"cmpw 0, %0, %3;" \
168	"bne- 2f;" \
169	"stwcx. %2, 0, %1;" \
170	"bne- 1b;" \
171	"2:" \
172	: "=&r" (previous) \
173	: "r" (target), \
174	"r" (set), \
175	"r" (compare) \
176	: "memory", "cc"); \
177	return (previous == compare); \
178	}
179
180	CK_PR_CAS(ptr, void *, void)
181	#define CK_PR_CAS_S(a, b) CK_PR_CAS(a, b, b)
182	CK_PR_CAS_S(32, uint32_t)
183	CK_PR_CAS_S(uint, unsigned int)
184	CK_PR_CAS_S(int, int)
185
186	#undef CK_PR_CAS_S
187	#undef CK_PR_CAS
188
189	#define CK_PR_FAS(N, M, T, W) \
190	CK_CC_INLINE static T \
191	ck_pr_fas_##N(M *target, T v) \
192	{ \
193	T previous; \
194	__asm__ __volatile__("1:" \
195	"l" W "arx %0, 0, %1;" \
196	"st" W "cx. %2, 0, %1;" \
197	"bne- 1b;" \
198	: "=&r" (previous) \
199	: "r" (target), \
200	"r" (v) \
201	: "memory", "cc"); \
202	return (previous); \
203	}
204
205	CK_PR_FAS(32, uint32_t, uint32_t, "w")
206	CK_PR_FAS(ptr, void, void *, "w")
207	CK_PR_FAS(int, int, int, "w")
208	CK_PR_FAS(uint, unsigned int, unsigned int, "w")
209
210	#undef CK_PR_FAS
211
212	#define CK_PR_UNARY(O, N, M, T, I, W) \
213	CK_CC_INLINE static void \
214	ck_pr_##O##_##N(M *target) \
215	{ \
216	T previous; \
217	__asm__ __volatile__("1:" \
218	"l" W "arx %0, 0, %1;" \
219	I ";" \
220	"st" W "cx. %0, 0, %1;" \
221	"bne- 1b;" \
222	: "=&r" (previous) \
223	: "r" (target) \
224	: "memory", "cc"); \
225	return; \
226	}
227
228	CK_PR_UNARY(inc, ptr, void, void *, "addic %0, %0, 1", "w")
229	CK_PR_UNARY(dec, ptr, void, void *, "addic %0, %0, -1", "w")
230	CK_PR_UNARY(not, ptr, void, void *, "not %0, %0", "w")
231	CK_PR_UNARY(neg, ptr, void, void *, "neg %0, %0", "w")
232
233	#define CK_PR_UNARY_S(S, T, W) \
234	CK_PR_UNARY(inc, S, T, T, "addic %0, %0, 1", W) \
235	CK_PR_UNARY(dec, S, T, T, "addic %0, %0, -1", W) \
236	CK_PR_UNARY(not, S, T, T, "not %0, %0", W) \
237	CK_PR_UNARY(neg, S, T, T, "neg %0, %0", W)
238
239	CK_PR_UNARY_S(32, uint32_t, "w")
240	CK_PR_UNARY_S(uint, unsigned int, "w")
241	CK_PR_UNARY_S(int, int, "w")
242
243	#undef CK_PR_UNARY_S
244	#undef CK_PR_UNARY
245
246	#define CK_PR_BINARY(O, N, M, T, I, W) \
247	CK_CC_INLINE static void \
248	ck_pr_##O##_##N(M *target, T delta) \
249	{ \
250	T previous; \
251	__asm__ __volatile__("1:" \
252	"l" W "arx %0, 0, %1;" \
253	I " %0, %2, %0;" \
254	"st" W "cx. %0, 0, %1;" \
255	"bne- 1b;" \
256	: "=&r" (previous) \
257	: "r" (target), \
258	"r" (delta) \
259	: "memory", "cc"); \
260	return; \
261	}
262
263	CK_PR_BINARY(and, ptr, void, uintptr_t, "and", "w")
264	CK_PR_BINARY(add, ptr, void, uintptr_t, "add", "w")
265	CK_PR_BINARY(or, ptr, void, uintptr_t, "or", "w")
266	CK_PR_BINARY(sub, ptr, void, uintptr_t, "sub", "w")
267	CK_PR_BINARY(xor, ptr, void, uintptr_t, "xor", "w")
268
269	#define CK_PR_BINARY_S(S, T, W) \
270	CK_PR_BINARY(and, S, T, T, "and", W) \
271	CK_PR_BINARY(add, S, T, T, "add", W) \
272	CK_PR_BINARY(or, S, T, T, "or", W) \
273	CK_PR_BINARY(sub, S, T, T, "subf", W) \
274	CK_PR_BINARY(xor, S, T, T, "xor", W)
275
276	CK_PR_BINARY_S(32, uint32_t, "w")
277	CK_PR_BINARY_S(uint, unsigned int, "w")
278	CK_PR_BINARY_S(int, int, "w")
279
280	#undef CK_PR_BINARY_S
281	#undef CK_PR_BINARY
282
283	CK_CC_INLINE static void *
284	ck_pr_faa_ptr(void *target, uintptr_t delta)
285	{
286	uintptr_t previous, r;
287
288	__asm__ __volatile__("1:"
289	"lwarx %0, 0, %2;"
290	"add %1, %3, %0;"
291	"stwcx. %1, 0, %2;"
292	"bne- 1b;"
293	: "=&r" (previous),
294	"=&r" (r)
295	: "r" (target),
296	"r" (delta)
297	: "memory", "cc");
298
299	return (void *)(previous);
300	}
301
302	#define CK_PR_FAA(S, T, W) \
303	CK_CC_INLINE static T \
304	ck_pr_faa_##S(T *target, T delta) \
305	{ \
306	T previous, r; \
307	__asm__ __volatile__("1:" \
308	"l" W "arx %0, 0, %2;" \
309	"add %1, %3, %0;" \
310	"st" W "cx. %1, 0, %2;" \
311	"bne- 1b;" \
312	: "=&r" (previous), \
313	"=&r" (r) \
314	: "r" (target), \
315	"r" (delta) \
316	: "memory", "cc"); \
317	return (previous); \
318	}
319
320	CK_PR_FAA(32, uint32_t, "w")
321	CK_PR_FAA(uint, unsigned int, "w")
322	CK_PR_FAA(int, int, "w")
323
324	#undef CK_PR_FAA
325
326	#endif /* CK_PR_PPC_H */
327

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source: rtems-libbsd/freebsd/sys/contrib/ck/include/gcc/ppc/ck_pr.h @ 3becda1

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