patch-2.3.40 linux/arch/arm/lib/bitops.S

• Lines: 153
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.39/linux/arch/arm/lib/bitops.S
• Orig date: Tue Jan 20 16:39:41 1998

diff -u --recursive --new-file v2.3.39/linux/arch/arm/lib/bitops.S linux/arch/arm/lib/bitops.S
@@ -1,152 +0,0 @@
-/*
- * linux/arch/arm/lib/bitops.S
- *
- * Copyright (C) 1995, 1996 Russell King
- */
-
-#include <linux/linkage.h>
-#include <asm/assembler.h>
-                .text
-
-@ Purpose  : Function to set a bit
-@ Prototype: int set_bit(int bit,int *addr)
-
-ENTRY(set_bit)
-                and     r2, r0, #7
-                mov     r3, #1
-                mov     r3, r3, lsl r2
-		SAVEIRQS(ip)
-		DISABLEIRQS(ip)
-		ldrb	r2, [r1, r0, lsr #3]
-		orr	r2, r2, r3
-		strb	r2, [r1, r0, lsr #3]
-		RESTOREIRQS(ip)
-		RETINSTR(mov,pc,lr)
-
-ENTRY(test_and_set_bit)
-		add	r1, r1, r0, lsr #3	@ Get byte offset
-		and	r3, r0, #7		@ Get bit offset
-		mov	r0, #1
-		SAVEIRQS(ip)
-		DISABLEIRQS(ip)
-		ldrb	r2, [r1]
-		tst	r2, r0, lsl r3
-		orr	r2, r2, r0, lsl r3
-		moveq	r0, #0
-		strb	r2, [r1]
-		RESTOREIRQS(ip)
-		RETINSTR(mov,pc,lr)
-
-@ Purpose  : Function to clear a bit
-@ Prototype: int clear_bit(int bit,int *addr)
-
-ENTRY(clear_bit)
-		and	r2, r0, #7
-		mov	r3, #1
-		mov	r3, r3, lsl r2
-		SAVEIRQS(ip)
-		DISABLEIRQS(ip)
-		ldrb	r2, [r1, r0, lsr #3]
-		bic	r2, r2, r3
-		strb	r2, [r1, r0, lsr #3]
-		RESTOREIRQS(ip)
-		RETINSTR(mov,pc,lr)
-
-ENTRY(test_and_clear_bit)
-		add	r1, r1, r0, lsr #3	@ Get byte offset
-		and	r3, r0, #7	@ Get bit offset
-		mov	r0, #1
-		SAVEIRQS(ip)
-		DISABLEIRQS(ip)
-		ldrb	r2, [r1]
-		tst	r2, r0, lsl r3
-		bic	r2, r2, r0, lsl r3
-		moveq	r0, #0
-		strb	r2, [r1]
-		RESTOREIRQS(ip)
-		RETINSTR(mov,pc,lr)
-
-/* Purpose  : Function to change a bit
- * Prototype: int change_bit(int bit,int *addr)
- */
-ENTRY(change_bit)
-                and     r2, r0, #7
-                mov     r3, #1
-                mov     r3, r3, lsl r2
-		SAVEIRQS(ip)
-		DISABLEIRQS(ip)
-		ldrb	r2, [r1, r0, lsr #3]
-		eor	r2, r2, r3
-		strb	r2, [r1, r0, lsr #3]
-		RESTOREIRQS(ip)
-		RETINSTR(mov,pc,lr)
-
-ENTRY(test_and_change_bit)
-		add	r1, r1, r0, lsr #3
-		and	r3, r0, #7
-		mov	r0, #1
-		SAVEIRQS(ip)
-		DISABLEIRQS(ip)
-		ldrb	r2, [r1]
-		tst	r2, r0, lsl r3
-		eor	r2, r2, r0, lsl r3
-		moveq	r0, #0
-		strb	r2, [r1]
-		RESTOREIRQS(ip)
-		RETINSTR(mov,pc,lr)
-
-@ Purpose  : Find a 'zero' bit
-@ Prototype: int find_first_zero_bit(char *addr,int maxbit);
-
-ENTRY(find_first_zero_bit)
-		mov	r2, #0			@ Initialise bit position
-Lfindzbit1lp:	ldrb	r3, [r0, r2, lsr #3]	@ Check byte, if 0xFF, then all bits set
-		teq	r3, #0xFF
-		bne	Lfoundzbit
-		add	r2, r2, #8
-		cmp	r2, r1			@ Check to see if we have come to the end
-		bcc	Lfindzbit1lp
-		add	r0, r1, #1		@ Make sure that we flag an error
-		RETINSTR(mov,pc,lr)
-Lfoundzbit:	tst	r3, #1			@ Check individual bits
-		moveq	r0, r2
-		RETINSTR(moveq,pc,lr)
-		tst	r3, #2
-		addeq	r0, r2, #1
-		RETINSTR(moveq,pc,lr)
-		tst	r3, #4
-		addeq	r0, r2, #2
-		RETINSTR(moveq,pc,lr)
-		tst	r3, #8
-		addeq	r0, r2, #3
-		RETINSTR(moveq,pc,lr)
-		tst	r3, #16
-		addeq	r0, r2, #4
-		RETINSTR(moveq,pc,lr)
-		tst	r3, #32
-		addeq	r0, r2, #5
-		RETINSTR(moveq,pc,lr)
-		tst	r3, #64
-		addeq	r0, r2, #6
-		RETINSTR(moveq,pc,lr)
-		add	r0, r2, #7
-		RETINSTR(mov,pc,lr)
-
-@ Purpose  : Find next 'zero' bit
-@ Prototype: int find_next_zero_bit(char *addr,int maxbit,int offset)
-
-ENTRY(find_next_zero_bit)
-		tst	r2, #7
-		beq	Lfindzbit1lp		@ If new byte, goto old routine
-		ldrb	r3, [r0, r2, lsr#3]
-		orr	r3, r3, #0xFF00		@ Set top bits so we wont get confused
-		stmfd	sp!, {r4}
-		and	r4, r2, #7
-		mov	r3, r3, lsr r4		@ Shift right by no. of bits
-		ldmfd	sp!, {r4}
-		and	r3, r3, #0xFF
-		teq	r3, #0xFF
-		orreq	r2, r2, #7
-		addeq	r2, r2, #1
-		beq	Lfindzbit1lp		@ If all bits are set, goto old routine
-		b	Lfoundzbit