diff options
Diffstat (limited to 'include/asm-x86/delay_32.h')
| -rw-r--r-- | include/asm-x86/delay_32.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/include/asm-x86/delay_32.h b/include/asm-x86/delay_32.h new file mode 100644 index 000000000000..9ae5e3782ed8 --- /dev/null +++ b/include/asm-x86/delay_32.h @@ -0,0 +1,31 @@ +#ifndef _I386_DELAY_H +#define _I386_DELAY_H + +/* + * Copyright (C) 1993 Linus Torvalds + * + * Delay routines calling functions in arch/i386/lib/delay.c + */ + +/* Undefined functions to get compile-time errors */ +extern void __bad_udelay(void); +extern void __bad_ndelay(void); + +extern void __udelay(unsigned long usecs); +extern void __ndelay(unsigned long nsecs); +extern void __const_udelay(unsigned long usecs); +extern void __delay(unsigned long loops); + +/* 0x10c7 is 2**32 / 1000000 (rounded up) */ +#define udelay(n) (__builtin_constant_p(n) ? \ + ((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c7ul)) : \ + __udelay(n)) + +/* 0x5 is 2**32 / 1000000000 (rounded up) */ +#define ndelay(n) (__builtin_constant_p(n) ? \ + ((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \ + __ndelay(n)) + +void use_tsc_delay(void); + +#endif /* defined(_I386_DELAY_H) */ |