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