diff options
Diffstat (limited to 'include/asm-mips/delay.h')
| -rw-r--r-- | include/asm-mips/delay.h | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/include/asm-mips/delay.h b/include/asm-mips/delay.h index fab32131e9b..b0bccd2c4ed 100644 --- a/include/asm-mips/delay.h +++ b/include/asm-mips/delay.h @@ -6,13 +6,16 @@ * 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 */ #ifndef _ASM_DELAY_H #define _ASM_DELAY_H #include <linux/param.h> #include <linux/smp.h> + #include <asm/compiler.h> +#include <asm/war.h> static inline void __delay(unsigned long loops) { @@ -25,7 +28,7 @@ static inline void __delay(unsigned long loops) " .set reorder \n" : "=r" (loops) : "0" (loops)); - else if (sizeof(long) == 8) + else if (sizeof(long) == 8 && !DADDI_WAR) __asm__ __volatile__ ( " .set noreorder \n" " .align 3 \n" @@ -34,6 +37,15 @@ static inline void __delay(unsigned long loops) " .set reorder \n" : "=r" (loops) : "0" (loops)); + else if (sizeof(long) == 8 && DADDI_WAR) + __asm__ __volatile__ ( + " .set noreorder \n" + " .align 3 \n" + "1: bnez %0, 1b \n" + " dsubu %0, %2 \n" + " .set reorder \n" + : "=r" (loops) + : "0" (loops), "r" (1)); } @@ -50,7 +62,7 @@ static inline void __delay(unsigned long loops) static inline void __udelay(unsigned long usecs, unsigned long lpj) { - unsigned long lo; + unsigned long hi, lo; /* * The rates of 128 is rounded wrongly by the catchall case @@ -70,11 +82,16 @@ static inline void __udelay(unsigned long usecs, unsigned long lpj) : "=h" (usecs), "=l" (lo) : "r" (usecs), "r" (lpj) : GCC_REG_ACCUM); - else if (sizeof(long) == 8) + else if (sizeof(long) == 8 && !R4000_WAR) __asm__("dmultu\t%2, %3" : "=h" (usecs), "=l" (lo) : "r" (usecs), "r" (lpj) : GCC_REG_ACCUM); + else if (sizeof(long) == 8 && R4000_WAR) + __asm__("dmultu\t%3, %4\n\tmfhi\t%0" + : "=r" (usecs), "=h" (hi), "=l" (lo) + : "r" (usecs), "r" (lpj) + : GCC_REG_ACCUM); __delay(usecs); } |