projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 24f287e4 | 2 | /* bitops.S: Sparc64 atomic bit operations. |
| 1da177e4 | 3 | * |
| 24f287e4 | 4 | * Copyright (C) 2000, 2007 David S. Miller (davem@davemloft.net) |
| 1da177e4 LT |
5 | */ |
| 6 | ||
| 8695c37d | 7 | #include <linux/linkage.h> |
| 1da177e4 | 8 | #include <asm/asi.h> |
| 24f287e4 | 9 | #include <asm/backoff.h> |
| d3867f04 | 10 | #include <asm/export.h> |
| 1da177e4 | 11 | |
| b445e26c DM |
12 | .text |
| 13 | ||
| 8695c37d | 14 | ENTRY(test_and_set_bit) /* %o0=nr, %o1=addr */ |
| 24f287e4 | 15 | BACKOFF_SETUP(%o3) |
| 1da177e4 LT |
16 | srlx %o0, 6, %g1 |
| 17 | mov 1, %o2 | |
| 18 | sllx %g1, 3, %g3 | |
| 19 | and %o0, 63, %g2 | |
| 20 | sllx %o2, %g2, %o2 | |
| 21 | add %o1, %g3, %o1 | |
| 22 | 1: ldx [%o1], %g7 | |
| 23 | or %g7, %o2, %g1 | |
| 24 | casx [%o1], %g7, %g1 | |
| 25 | cmp %g7, %g1 | |
| 0f58189d | 26 | bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
| 1da177e4 | 27 | and %g7, %o2, %g2 |
| 1da177e4 | 28 | clr %o0 |
| b445e26c | 29 | movrne %g2, 1, %o0 |
| 1da177e4 | 30 | retl |
| b445e26c | 31 | nop |
| 24f287e4 | 32 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
| 8695c37d | 33 | ENDPROC(test_and_set_bit) |
| d3867f04 | 34 | EXPORT_SYMBOL(test_and_set_bit) |
| 1da177e4 | 35 | |
| 8695c37d | 36 | ENTRY(test_and_clear_bit) /* %o0=nr, %o1=addr */ |
| 24f287e4 | 37 | BACKOFF_SETUP(%o3) |
| 1da177e4 LT |
38 | srlx %o0, 6, %g1 |
| 39 | mov 1, %o2 | |
| 40 | sllx %g1, 3, %g3 | |
| 41 | and %o0, 63, %g2 | |
| 42 | sllx %o2, %g2, %o2 | |
| 43 | add %o1, %g3, %o1 | |
| 44 | 1: ldx [%o1], %g7 | |
| 45 | andn %g7, %o2, %g1 | |
| 46 | casx [%o1], %g7, %g1 | |
| 47 | cmp %g7, %g1 | |
| 0f58189d | 48 | bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
| 1da177e4 | 49 | and %g7, %o2, %g2 |
| 1da177e4 | 50 | clr %o0 |
| b445e26c | 51 | movrne %g2, 1, %o0 |
| 1da177e4 | 52 | retl |
| b445e26c | 53 | nop |
| 24f287e4 | 54 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
| 8695c37d | 55 | ENDPROC(test_and_clear_bit) |
| d3867f04 | 56 | EXPORT_SYMBOL(test_and_clear_bit) |
| 1da177e4 | 57 | |
| 8695c37d | 58 | ENTRY(test_and_change_bit) /* %o0=nr, %o1=addr */ |
| 24f287e4 | 59 | BACKOFF_SETUP(%o3) |
| 1da177e4 LT |
60 | srlx %o0, 6, %g1 |
| 61 | mov 1, %o2 | |
| 62 | sllx %g1, 3, %g3 | |
| 63 | and %o0, 63, %g2 | |
| 64 | sllx %o2, %g2, %o2 | |
| 65 | add %o1, %g3, %o1 | |
| 66 | 1: ldx [%o1], %g7 | |
| 67 | xor %g7, %o2, %g1 | |
| 68 | casx [%o1], %g7, %g1 | |
| 69 | cmp %g7, %g1 | |
| 0f58189d | 70 | bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
| 1da177e4 | 71 | and %g7, %o2, %g2 |
| 1da177e4 | 72 | clr %o0 |
| b445e26c | 73 | movrne %g2, 1, %o0 |
| 1da177e4 | 74 | retl |
| b445e26c | 75 | nop |
| 24f287e4 | 76 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
| 8695c37d | 77 | ENDPROC(test_and_change_bit) |
| d3867f04 | 78 | EXPORT_SYMBOL(test_and_change_bit) |
| 1da177e4 | 79 | |
| 8695c37d | 80 | ENTRY(set_bit) /* %o0=nr, %o1=addr */ |
| 24f287e4 | 81 | BACKOFF_SETUP(%o3) |
| 1da177e4 LT |
82 | srlx %o0, 6, %g1 |
| 83 | mov 1, %o2 | |
| 84 | sllx %g1, 3, %g3 | |
| 85 | and %o0, 63, %g2 | |
| 86 | sllx %o2, %g2, %o2 | |
| 87 | add %o1, %g3, %o1 | |
| 88 | 1: ldx [%o1], %g7 | |
| 89 | or %g7, %o2, %g1 | |
| 90 | casx [%o1], %g7, %g1 | |
| 91 | cmp %g7, %g1 | |
| 0f58189d | 92 | bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
| 1da177e4 LT |
93 | nop |
| 94 | retl | |
| 95 | nop | |
| 24f287e4 | 96 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
| 8695c37d | 97 | ENDPROC(set_bit) |
| d3867f04 | 98 | EXPORT_SYMBOL(set_bit) |
| 1da177e4 | 99 | |
| 8695c37d | 100 | ENTRY(clear_bit) /* %o0=nr, %o1=addr */ |
| 24f287e4 | 101 | BACKOFF_SETUP(%o3) |
| 1da177e4 LT |
102 | srlx %o0, 6, %g1 |
| 103 | mov 1, %o2 | |
| 104 | sllx %g1, 3, %g3 | |
| 105 | and %o0, 63, %g2 | |
| 106 | sllx %o2, %g2, %o2 | |
| 107 | add %o1, %g3, %o1 | |
| 108 | 1: ldx [%o1], %g7 | |
| 109 | andn %g7, %o2, %g1 | |
| 110 | casx [%o1], %g7, %g1 | |
| 111 | cmp %g7, %g1 | |
| 0f58189d | 112 | bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
| 1da177e4 LT |
113 | nop |
| 114 | retl | |
| 115 | nop | |
| 24f287e4 | 116 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
| 8695c37d | 117 | ENDPROC(clear_bit) |
| d3867f04 | 118 | EXPORT_SYMBOL(clear_bit) |
| 1da177e4 | 119 | |
| 8695c37d | 120 | ENTRY(change_bit) /* %o0=nr, %o1=addr */ |
| 24f287e4 | 121 | BACKOFF_SETUP(%o3) |
| 1da177e4 LT |
122 | srlx %o0, 6, %g1 |
| 123 | mov 1, %o2 | |
| 124 | sllx %g1, 3, %g3 | |
| 125 | and %o0, 63, %g2 | |
| 126 | sllx %o2, %g2, %o2 | |
| 127 | add %o1, %g3, %o1 | |
| 128 | 1: ldx [%o1], %g7 | |
| 129 | xor %g7, %o2, %g1 | |
| 130 | casx [%o1], %g7, %g1 | |
| 131 | cmp %g7, %g1 | |
| 0f58189d | 132 | bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
| 1da177e4 LT |
133 | nop |
| 134 | retl | |
| 135 | nop | |
| 24f287e4 | 136 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
| 8695c37d | 137 | ENDPROC(change_bit) |
| d3867f04 | 138 | EXPORT_SYMBOL(change_bit) |