1#include <asm/unwind.h>
  2
  3#if __LINUX_ARM_ARCH__ >= 6
  4	.macro	bitop, name, instr
  5ENTRY(	\name		)
  6UNWIND(	.fnstart	)
  7	ands	ip, r1, #3
  8	strneb	r1, [ip]		@ assert word-aligned
  9	mov	r2, #1
 10	and	r3, r0, #31		@ Get bit offset
 11	mov	r0, r0, lsr #5
 12	add	r1, r1, r0, lsl #2	@ Get word offset
 13#if __LINUX_ARM_ARCH__ >= 7 && defined(CONFIG_SMP)
 14	.arch_extension	mp
 15	ALT_SMP(W(pldw)	[r1])
 16	ALT_UP(W(nop))
 17#endif
 18	mov	r3, r2, lsl r3
 191:	ldrex	r2, [r1]
 20	\instr	r2, r2, r3
 21	strex	r0, r2, [r1]
 22	cmp	r0, #0
 23	bne	1b
 24	bx	lr
 25UNWIND(	.fnend		)
 26ENDPROC(\name		)
 27	.endm
 28
 29	.macro	testop, name, instr, store
 30ENTRY(	\name		)
 31UNWIND(	.fnstart	)
 32	ands	ip, r1, #3
 33	strneb	r1, [ip]		@ assert word-aligned
 34	mov	r2, #1
 35	and	r3, r0, #31		@ Get bit offset
 36	mov	r0, r0, lsr #5
 37	add	r1, r1, r0, lsl #2	@ Get word offset
 38	mov	r3, r2, lsl r3		@ create mask
 39	smp_dmb
 40#if __LINUX_ARM_ARCH__ >= 7 && defined(CONFIG_SMP)
 41	.arch_extension	mp
 42	ALT_SMP(W(pldw)	[r1])
 43	ALT_UP(W(nop))
 44#endif
 451:	ldrex	r2, [r1]
 46	ands	r0, r2, r3		@ save old value of bit
 47	\instr	r2, r2, r3		@ toggle bit
 48	strex	ip, r2, [r1]
 49	cmp	ip, #0
 50	bne	1b
 51	smp_dmb
 52	cmp	r0, #0
 53	movne	r0, #1
 542:	bx	lr
 55UNWIND(	.fnend		)
 56ENDPROC(\name		)
 57	.endm
 58#else
 59	.macro	bitop, name, instr
 60ENTRY(	\name		)
 61UNWIND(	.fnstart	)
 62	ands	ip, r1, #3
 63	strneb	r1, [ip]		@ assert word-aligned
 64	and	r2, r0, #31
 65	mov	r0, r0, lsr #5
 66	mov	r3, #1
 67	mov	r3, r3, lsl r2
 68	save_and_disable_irqs ip
 69	ldr	r2, [r1, r0, lsl #2]
 70	\instr	r2, r2, r3
 71	str	r2, [r1, r0, lsl #2]
 72	restore_irqs ip
 73	mov	pc, lr
 74UNWIND(	.fnend		)
 75ENDPROC(\name		)
 76	.endm
 77
 78/**
 79 * testop - implement a test_and_xxx_bit operation.
 80 * @instr: operational instruction
 81 * @store: store instruction
 82 *
 83 * Note: we can trivially conditionalise the store instruction
 84 * to avoid dirtying the data cache.
 85 */
 86	.macro	testop, name, instr, store
 87ENTRY(	\name		)
 88UNWIND(	.fnstart	)
 89	ands	ip, r1, #3
 90	strneb	r1, [ip]		@ assert word-aligned
 91	and	r3, r0, #31
 92	mov	r0, r0, lsr #5
 93	save_and_disable_irqs ip
 94	ldr	r2, [r1, r0, lsl #2]!
 95	mov	r0, #1
 96	tst	r2, r0, lsl r3
 97	\instr	r2, r2, r0, lsl r3
 98	\store	r2, [r1]
 99	moveq	r0, #0
100	restore_irqs ip
101	mov	pc, lr
102UNWIND(	.fnend		)
103ENDPROC(\name		)
104	.endm
105#endif

  1#include <asm/assembler.h>
  2#include <asm/unwind.h>
  3
  4#if __LINUX_ARM_ARCH__ >= 6
  5	.macro	bitop, name, instr
  6ENTRY(	\name		)
  7UNWIND(	.fnstart	)
  8	ands	ip, r1, #3
  9	strneb	r1, [ip]		@ assert word-aligned
 10	mov	r2, #1
 11	and	r3, r0, #31		@ Get bit offset
 12	mov	r0, r0, lsr #5
 13	add	r1, r1, r0, lsl #2	@ Get word offset
 14#if __LINUX_ARM_ARCH__ >= 7 && defined(CONFIG_SMP)
 15	.arch_extension	mp
 16	ALT_SMP(W(pldw)	[r1])
 17	ALT_UP(W(nop))
 18#endif
 19	mov	r3, r2, lsl r3
 201:	ldrex	r2, [r1]
 21	\instr	r2, r2, r3
 22	strex	r0, r2, [r1]
 23	cmp	r0, #0
 24	bne	1b
 25	bx	lr
 26UNWIND(	.fnend		)
 27ENDPROC(\name		)
 28	.endm
 29
 30	.macro	testop, name, instr, store
 31ENTRY(	\name		)
 32UNWIND(	.fnstart	)
 33	ands	ip, r1, #3
 34	strneb	r1, [ip]		@ assert word-aligned
 35	mov	r2, #1
 36	and	r3, r0, #31		@ Get bit offset
 37	mov	r0, r0, lsr #5
 38	add	r1, r1, r0, lsl #2	@ Get word offset
 39	mov	r3, r2, lsl r3		@ create mask
 40	smp_dmb
 41#if __LINUX_ARM_ARCH__ >= 7 && defined(CONFIG_SMP)
 42	.arch_extension	mp
 43	ALT_SMP(W(pldw)	[r1])
 44	ALT_UP(W(nop))
 45#endif
 461:	ldrex	r2, [r1]
 47	ands	r0, r2, r3		@ save old value of bit
 48	\instr	r2, r2, r3		@ toggle bit
 49	strex	ip, r2, [r1]
 50	cmp	ip, #0
 51	bne	1b
 52	smp_dmb
 53	cmp	r0, #0
 54	movne	r0, #1
 552:	bx	lr
 56UNWIND(	.fnend		)
 57ENDPROC(\name		)
 58	.endm
 59#else
 60	.macro	bitop, name, instr
 61ENTRY(	\name		)
 62UNWIND(	.fnstart	)
 63	ands	ip, r1, #3
 64	strneb	r1, [ip]		@ assert word-aligned
 65	and	r2, r0, #31
 66	mov	r0, r0, lsr #5
 67	mov	r3, #1
 68	mov	r3, r3, lsl r2
 69	save_and_disable_irqs ip
 70	ldr	r2, [r1, r0, lsl #2]
 71	\instr	r2, r2, r3
 72	str	r2, [r1, r0, lsl #2]
 73	restore_irqs ip
 74	ret	lr
 75UNWIND(	.fnend		)
 76ENDPROC(\name		)
 77	.endm
 78
 79/**
 80 * testop - implement a test_and_xxx_bit operation.
 81 * @instr: operational instruction
 82 * @store: store instruction
 83 *
 84 * Note: we can trivially conditionalise the store instruction
 85 * to avoid dirtying the data cache.
 86 */
 87	.macro	testop, name, instr, store
 88ENTRY(	\name		)
 89UNWIND(	.fnstart	)
 90	ands	ip, r1, #3
 91	strneb	r1, [ip]		@ assert word-aligned
 92	and	r3, r0, #31
 93	mov	r0, r0, lsr #5
 94	save_and_disable_irqs ip
 95	ldr	r2, [r1, r0, lsl #2]!
 96	mov	r0, #1
 97	tst	r2, r0, lsl r3
 98	\instr	r2, r2, r0, lsl r3
 99	\store	r2, [r1]
100	moveq	r0, #0
101	restore_irqs ip
102	ret	lr
103UNWIND(	.fnend		)
104ENDPROC(\name		)
105	.endm
106#endif