From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/arm26/lib/delay.S | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 arch/arm26/lib/delay.S (limited to 'arch/arm26/lib/delay.S') diff --git a/arch/arm26/lib/delay.S b/arch/arm26/lib/delay.S new file mode 100644 index 000000000000..66f2b68e1b13 --- /dev/null +++ b/arch/arm26/lib/delay.S @@ -0,0 +1,57 @@ +/* + * linux/arch/arm26/lib/delay.S + * + * Copyright (C) 1995, 1996 Russell King + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include +#include + .text + +LC0: .word loops_per_jiffy + +/* + * 0 <= r0 <= 2000 + */ +ENTRY(udelay) + mov r2, #0x6800 + orr r2, r2, #0x00db + mul r1, r0, r2 + ldr r2, LC0 + ldr r2, [r2] + mov r1, r1, lsr #11 + mov r2, r2, lsr #11 + mul r0, r1, r2 + movs r0, r0, lsr #6 + RETINSTR(moveq,pc,lr) + +/* + * loops = (r0 * 0x10c6 * 100 * loops_per_jiffy) / 2^32 + * + * Oh, if only we had a cycle counter... + */ + +@ Delay routine +ENTRY(__delay) + subs r0, r0, #1 +#if 0 + RETINSTR(movls,pc,lr) + subs r0, r0, #1 + RETINSTR(movls,pc,lr) + subs r0, r0, #1 + RETINSTR(movls,pc,lr) + subs r0, r0, #1 + RETINSTR(movls,pc,lr) + subs r0, r0, #1 + RETINSTR(movls,pc,lr) + subs r0, r0, #1 + RETINSTR(movls,pc,lr) + subs r0, r0, #1 + RETINSTR(movls,pc,lr) + subs r0, r0, #1 +#endif + bhi __delay + RETINSTR(mov,pc,lr) -- cgit v1.2.3