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1 | // SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
2 | // | |
3 | // SPDX-License-Identifier: MIT | |
4 | ||
7e30abe3 MD |
5 | #ifndef _URCU_SYSTEM_H |
6 | #define _URCU_SYSTEM_H | |
7 | ||
8 | /* | |
7e30abe3 | 9 | * System definitions. |
7e30abe3 MD |
10 | */ |
11 | ||
12 | #include <urcu/compiler.h> | |
13 | #include <urcu/arch.h> | |
14 | ||
15 | /* | |
d0bbd9c2 MD |
16 | * Identify a shared load. A cmm_smp_rmc() or cmm_smp_mc() should come |
17 | * before the load. | |
7e30abe3 | 18 | */ |
f5ee48a3 | 19 | #define _CMM_LOAD_SHARED(p) CMM_ACCESS_ONCE(p) |
7e30abe3 MD |
20 | |
21 | /* | |
22 | * Load a data from shared memory, doing a cache flush if required. | |
23 | */ | |
6cf3827c | 24 | #define CMM_LOAD_SHARED(p) \ |
1b85da85 | 25 | __extension__ \ |
7e30abe3 | 26 | ({ \ |
5481ddb3 | 27 | cmm_smp_rmc(); \ |
6cf3827c | 28 | _CMM_LOAD_SHARED(p); \ |
7e30abe3 MD |
29 | }) |
30 | ||
31 | /* | |
d0bbd9c2 MD |
32 | * Identify a shared store. A cmm_smp_wmc() or cmm_smp_mc() should |
33 | * follow the store. | |
7e30abe3 | 34 | */ |
1b85da85 | 35 | #define _CMM_STORE_SHARED(x, v) __extension__ ({ CMM_ACCESS_ONCE(x) = (v); }) |
7e30abe3 MD |
36 | |
37 | /* | |
d0bbd9c2 MD |
38 | * Store v into x, where x is located in shared memory. Performs the |
39 | * required cache flush after writing. Returns v. | |
7e30abe3 | 40 | */ |
79a8e6c3 | 41 | #define CMM_STORE_SHARED(x, v) \ |
1b85da85 | 42 | __extension__ \ |
79a8e6c3 MD |
43 | ({ \ |
44 | __typeof__(x) _v = _CMM_STORE_SHARED(x, v); \ | |
45 | cmm_smp_wmc(); \ | |
46 | _v = _v; /* Work around clang "unused result" */ \ | |
7e30abe3 MD |
47 | }) |
48 | ||
49 | #endif /* _URCU_SYSTEM_H */ |