diff options
Diffstat (limited to 'arch/mips/lib/delay.c')
| -rw-r--r-- | arch/mips/lib/delay.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/arch/mips/lib/delay.c b/arch/mips/lib/delay.c index 5995969e8c4..21d27c6819a 100644 --- a/arch/mips/lib/delay.c +++ b/arch/mips/lib/delay.c @@ -6,25 +6,33 @@ * Copyright (C) 1994 by Waldorf Electronics * Copyright (C) 1995 - 2000, 01, 03 by Ralf Baechle * Copyright (C) 1999, 2000 Silicon Graphics, Inc. - * Copyright (C) 2007 Maciej W. Rozycki + * Copyright (C) 2007, 2014 Maciej W. Rozycki */ #include <linux/module.h> #include <linux/param.h> #include <linux/smp.h> +#include <linux/stringify.h> +#include <asm/asm.h> #include <asm/compiler.h> #include <asm/war.h> -inline void __delay(unsigned int loops) +#ifndef CONFIG_CPU_DADDI_WORKAROUNDS +#define GCC_DADDI_IMM_ASM() "I" +#else +#define GCC_DADDI_IMM_ASM() "r" +#endif + +void __delay(unsigned long loops) { __asm__ __volatile__ ( " .set noreorder \n" " .align 3 \n" "1: bnez %0, 1b \n" - " subu %0, 1 \n" + " " __stringify(LONG_SUBU) " %0, %1 \n" " .set reorder \n" : "=r" (loops) - : "0" (loops)); + : GCC_DADDI_IMM_ASM() (1), "0" (loops)); } EXPORT_SYMBOL(__delay); @@ -32,7 +40,7 @@ EXPORT_SYMBOL(__delay); * Division by multiplication: you don't have to worry about * loss of precision. * - * Use only for very small delays ( < 1 msec). Should probably use a + * Use only for very small delays ( < 1 msec). Should probably use a * lookup table, really, as the multiplications take much too long with * short delays. This is a "reasonable" implementation, though (and the * first constant multiplications gets optimized away if the delay is |