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[PATCH] ARM: Add missing new file for bitops patch 

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
hifive-unleashed-5.1
Russell King 2005-04-18 22:50:01 +01:00
parent 9c7d3b3a6b
commit 7a55fd0bb3
1 changed files with 33 additions and 0 deletions
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33
arch/arm/lib/bitops.h 100644
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@ -0,0 +1,33 @@
.macro bitop, instr
and r2, r0, #7
mov r3, #1
mov r3, r3, lsl r2
save_and_disable_irqs ip, r2
ldrb r2, [r1, r0, lsr #3]
\instr r2, r2, r3
strb r2, [r1, r0, lsr #3]
restore_irqs ip
mov pc, lr
.endm
/**
* testop - implement a test_and_xxx_bit operation.
* @instr: operational instruction
* @store: store instruction
*
* Note: we can trivially conditionalise the store instruction
* to avoid dirting the data cache.
*/
.macro testop, instr, store
add r1, r1, r0, lsr #3
and r3, r0, #7
mov r0, #1
save_and_disable_irqs ip, r2
ldrb r2, [r1]
tst r2, r0, lsl r3
\instr r2, r2, r0, lsl r3
\store r2, [r1]
restore_irqs ip
moveq r0, #0
mov pc, lr
.endm