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138 lines
2.6 KiB
138 lines
2.6 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* bitops.S: Sparc64 atomic bit operations. |
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* |
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* Copyright (C) 2000, 2007 David S. Miller (davem@davemloft.net) |
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*/ |
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#include <linux/linkage.h> |
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#include <asm/asi.h> |
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#include <asm/backoff.h> |
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#include <asm/export.h> |
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.text |
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ENTRY(test_and_set_bit) /* %o0=nr, %o1=addr */ |
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BACKOFF_SETUP(%o3) |
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srlx %o0, 6, %g1 |
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mov 1, %o2 |
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sllx %g1, 3, %g3 |
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and %o0, 63, %g2 |
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sllx %o2, %g2, %o2 |
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add %o1, %g3, %o1 |
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1: ldx [%o1], %g7 |
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or %g7, %o2, %g1 |
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casx [%o1], %g7, %g1 |
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cmp %g7, %g1 |
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bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
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and %g7, %o2, %g2 |
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clr %o0 |
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movrne %g2, 1, %o0 |
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retl |
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nop |
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2: BACKOFF_SPIN(%o3, %o4, 1b) |
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ENDPROC(test_and_set_bit) |
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EXPORT_SYMBOL(test_and_set_bit) |
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ENTRY(test_and_clear_bit) /* %o0=nr, %o1=addr */ |
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BACKOFF_SETUP(%o3) |
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srlx %o0, 6, %g1 |
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mov 1, %o2 |
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sllx %g1, 3, %g3 |
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and %o0, 63, %g2 |
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sllx %o2, %g2, %o2 |
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add %o1, %g3, %o1 |
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1: ldx [%o1], %g7 |
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andn %g7, %o2, %g1 |
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casx [%o1], %g7, %g1 |
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cmp %g7, %g1 |
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bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
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and %g7, %o2, %g2 |
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clr %o0 |
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movrne %g2, 1, %o0 |
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retl |
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nop |
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2: BACKOFF_SPIN(%o3, %o4, 1b) |
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ENDPROC(test_and_clear_bit) |
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EXPORT_SYMBOL(test_and_clear_bit) |
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ENTRY(test_and_change_bit) /* %o0=nr, %o1=addr */ |
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BACKOFF_SETUP(%o3) |
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srlx %o0, 6, %g1 |
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mov 1, %o2 |
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sllx %g1, 3, %g3 |
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and %o0, 63, %g2 |
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sllx %o2, %g2, %o2 |
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add %o1, %g3, %o1 |
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1: ldx [%o1], %g7 |
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xor %g7, %o2, %g1 |
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casx [%o1], %g7, %g1 |
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cmp %g7, %g1 |
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bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
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and %g7, %o2, %g2 |
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clr %o0 |
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movrne %g2, 1, %o0 |
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retl |
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nop |
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2: BACKOFF_SPIN(%o3, %o4, 1b) |
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ENDPROC(test_and_change_bit) |
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EXPORT_SYMBOL(test_and_change_bit) |
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ENTRY(set_bit) /* %o0=nr, %o1=addr */ |
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BACKOFF_SETUP(%o3) |
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srlx %o0, 6, %g1 |
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mov 1, %o2 |
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sllx %g1, 3, %g3 |
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and %o0, 63, %g2 |
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sllx %o2, %g2, %o2 |
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add %o1, %g3, %o1 |
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1: ldx [%o1], %g7 |
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or %g7, %o2, %g1 |
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casx [%o1], %g7, %g1 |
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cmp %g7, %g1 |
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bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
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nop |
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retl |
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nop |
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2: BACKOFF_SPIN(%o3, %o4, 1b) |
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ENDPROC(set_bit) |
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EXPORT_SYMBOL(set_bit) |
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ENTRY(clear_bit) /* %o0=nr, %o1=addr */ |
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BACKOFF_SETUP(%o3) |
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srlx %o0, 6, %g1 |
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mov 1, %o2 |
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sllx %g1, 3, %g3 |
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and %o0, 63, %g2 |
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sllx %o2, %g2, %o2 |
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add %o1, %g3, %o1 |
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1: ldx [%o1], %g7 |
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andn %g7, %o2, %g1 |
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casx [%o1], %g7, %g1 |
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cmp %g7, %g1 |
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bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
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nop |
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retl |
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nop |
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2: BACKOFF_SPIN(%o3, %o4, 1b) |
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ENDPROC(clear_bit) |
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EXPORT_SYMBOL(clear_bit) |
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ENTRY(change_bit) /* %o0=nr, %o1=addr */ |
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BACKOFF_SETUP(%o3) |
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srlx %o0, 6, %g1 |
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mov 1, %o2 |
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sllx %g1, 3, %g3 |
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and %o0, 63, %g2 |
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sllx %o2, %g2, %o2 |
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add %o1, %g3, %o1 |
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1: ldx [%o1], %g7 |
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xor %g7, %o2, %g1 |
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casx [%o1], %g7, %g1 |
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cmp %g7, %g1 |
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bne,pn %xcc, BACKOFF_LABEL(2f, 1b) |
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nop |
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retl |
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nop |
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2: BACKOFF_SPIN(%o3, %o4, 1b) |
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ENDPROC(change_bit) |
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EXPORT_SYMBOL(change_bit)
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