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| Rev | Author | Line No. | Line |
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| 418 | jermar | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2005 Jakub Jermar |
| 418 | jermar | 3 | * All rights reserved. |
| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 1784 | jermar | 29 | /** @addtogroup sparc64 |
| 1702 | cejka | 30 | * @{ |
| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 1860 | jermar | 35 | #ifndef KERN_sparc64_BARRIER_H_ |
| 36 | #define KERN_sparc64_BARRIER_H_ |
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| 418 | jermar | 37 | |
| 38 | /* |
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| 2047 | jermar | 39 | * Our critical section barriers are prepared for the weakest RMO memory model. |
| 418 | jermar | 40 | */ |
| 2047 | jermar | 41 | #define CS_ENTER_BARRIER() \ |
| 2272 | jermar | 42 | asm volatile ( \ |
| 2047 | jermar | 43 | "membar #LoadLoad | #LoadStore\n" \ |
| 44 | ::: "memory" \ |
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| 45 | ) |
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| 46 | #define CS_LEAVE_BARRIER() \ |
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| 2272 | jermar | 47 | asm volatile ( \ |
| 2047 | jermar | 48 | "membar #StoreStore\n" \ |
| 49 | "membar #LoadStore\n" \ |
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| 50 | ::: "memory" \ |
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| 51 | ) |
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| 418 | jermar | 52 | |
| 2047 | jermar | 53 | #define memory_barrier() \ |
| 2082 | decky | 54 | asm volatile ("membar #LoadLoad | #StoreStore\n" ::: "memory") |
| 2047 | jermar | 55 | #define read_barrier() \ |
| 2082 | decky | 56 | asm volatile ("membar #LoadLoad\n" ::: "memory") |
| 2047 | jermar | 57 | #define write_barrier() \ |
| 2082 | decky | 58 | asm volatile ("membar #StoreStore\n" ::: "memory") |
| 418 | jermar | 59 | |
| 3153 | svoboda | 60 | #define flush(a) \ |
| 61 | asm volatile ("flush %0\n" :: "r" ((a)) : "memory") |
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| 62 | |||
| 63 | /** Flush Instruction pipeline. */ |
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| 64 | static inline void flush_pipeline(void) |
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| 613 | jermar | 65 | { |
| 66 | /* |
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| 760 | jermar | 67 | * The FLUSH instruction takes address parameter. |
| 68 | * As such, it may trap if the address is not found in DTLB. |
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| 1854 | jermar | 69 | * |
| 70 | * The entire kernel text is mapped by a locked ITLB and |
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| 71 | * DTLB entries. Therefore, when this function is called, |
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| 72 | * the %o7 register will always be in the range mapped by |
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| 73 | * DTLB. |
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| 613 | jermar | 74 | */ |
| 883 | jermar | 75 | |
| 2082 | decky | 76 | asm volatile ("flush %o7\n"); |
| 613 | jermar | 77 | } |
| 569 | jermar | 78 | |
| 760 | jermar | 79 | /** Memory Barrier instruction. */ |
| 758 | jermar | 80 | static inline void membar(void) |
| 81 | { |
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| 2082 | decky | 82 | asm volatile ("membar #Sync\n"); |
| 758 | jermar | 83 | } |
| 84 | |||
| 4337 | svoboda | 85 | #if defined (US) |
| 86 | |||
| 3153 | svoboda | 87 | #define smc_coherence(a) \ |
| 88 | { \ |
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| 89 | write_barrier(); \ |
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| 90 | flush((a)); \ |
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| 91 | } |
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| 92 | |||
| 93 | #define FLUSH_INVAL_MIN 4 |
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| 94 | #define smc_coherence_block(a, l) \ |
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| 95 | { \ |
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| 96 | unsigned long i; \ |
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| 97 | write_barrier(); \ |
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| 98 | for (i = 0; i < (l); i += FLUSH_INVAL_MIN) \ |
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| 99 | flush((void *)(a) + i); \ |
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| 100 | } |
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| 101 | |||
| 4337 | svoboda | 102 | #elif defined (US3) |
| 103 | |||
| 104 | #define smc_coherence(a) \ |
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| 105 | { \ |
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| 106 | write_barrier(); \ |
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| 107 | flush_pipeline(); \ |
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| 108 | } |
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| 109 | |||
| 110 | #define smc_coherence_block(a, l) \ |
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| 111 | { \ |
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| 112 | write_barrier(); \ |
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| 113 | flush_pipeline(); \ |
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| 114 | } |
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| 115 | |||
| 116 | #endif /* defined(US3) */ |
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| 117 | |||
| 418 | jermar | 118 | #endif |
| 1702 | cejka | 119 | |
| 1784 | jermar | 120 | /** @} |
| 1702 | cejka | 121 | */ |