threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
139 lines
2.6 KiB
ArmAsm
139 lines
2.6 KiB
ArmAsm
/* 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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