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| author | Thomas Bushnell <thomas@gnu.org> | 1999-04-26 05:58:44 +0000 |
|---|---|---|
| committer | Thomas Bushnell <thomas@gnu.org> | 1999-04-26 05:58:44 +0000 |
| commit | 86297c41a26f18d924e64fc93321c59cbc4c48dd (patch) | |
| tree | 376954c6b95b735d361875319a1a2a9db6a27527 /linux/src/include/asm-i386/delay.h | |
| parent | 851137902d3e7ad87af177487df3eea53e940a1c (diff) | |
| download | gnumach-86297c41a26f18d924e64fc93321c59cbc4c48dd.tar.gz gnumach-86297c41a26f18d924e64fc93321c59cbc4c48dd.tar.bz2 gnumach-86297c41a26f18d924e64fc93321c59cbc4c48dd.zip | |
1998-11-30 OKUJI Yoshinori <okuji@kuicr.kyoto-u.ac.jp>
Clean up linux emulation code to make it architecture-independent
as much as possible.
* linux: Renamed from linuxdev.
* Makefile.in (objfiles): Add linux.o instead of linuxdev.o.
(MAKE): New variable. Used for the linux.o target.
* configure.in: Add AC_CHECK_TOOL(MAKE, make).
* i386/i386/spl.h: Include <i386/ipl.h>, for compatibility with
OSF Mach 3.0. Suggested by Elgin Lee <ehl@funghi.com>.
* linux/src: Renamed from linux/linux.
* linux/dev: Renamed from linux/mach.
* linux/Drivers.in (AC_INIT): Use dev/include/linux/autoconf.h,
instead of mach/include/linux/autoconf.h.
* Makefile.in (all): Target ../linux.o instead of ../linuxdev.o.
* linux/dev/drivers/block/genhd.c: Include <machine/spl.h> instead
of <i386/ipl.h>.
* linux/dev/drivers/net/auto_irq.c: Remove unneeded header files,
<i386/ipl.h> and <i386/pic.h>.
* linux/dev/init/main.c: Many i386-dependent codes moved to ...
* linux/dev/arch/i386/irq.c: ... here.
* linux/dev/arch/i386/setup.c: New file.
* linux/dev/arch/i386/linux_emul.h: Likewise.
* linux/dev/arch/i386/glue/timer.c: Merged into sched.c.
* linux/dev/arch/i386/glue/sched.c: Include <machine/spl.h> instead
of <i386/ipl.h>, and moved to ...
* linux/dev/kernel/sched.c: ... here.
* linux/dev/arch/i386/glue/block.c: Include <machine/spl.h> and
<linux_emul.h>, instead of i386-dependent header files, and
moved to ...
* linux/dev/glue/blocl.c: ... here.
* linux/dev/arch/i386/glue/net.c: Include <machine/spl.h> and
<linux_emul.h>, instead of i386-dependent header files, and
moved to ...
* linux/dev/glue/net.c: ... here.
* linux/dev/arch/i386/glue/misc.c: Remove `x86' and moved to ...
* linux/dev/glue/misc.c: ... here.
* linux/dev/arch/i386/glue/kmem.c: Moved to ...
* linux/dev/glue/kmem.c: ... here.
Diffstat (limited to 'linux/src/include/asm-i386/delay.h')
| -rw-r--r-- | linux/src/include/asm-i386/delay.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/linux/src/include/asm-i386/delay.h b/linux/src/include/asm-i386/delay.h new file mode 100644 index 00000000..2f4a41b9 --- /dev/null +++ b/linux/src/include/asm-i386/delay.h @@ -0,0 +1,63 @@ +#ifndef _I386_DELAY_H +#define _I386_DELAY_H + +/* + * Copyright (C) 1993 Linus Torvalds + * + * Delay routines, using a pre-computed "loops_per_second" value. + */ + +#include <linux/linkage.h> + +#ifdef __SMP__ +#include <asm/smp.h> +#endif + +extern void __do_delay(void); /* Special register call calling convention */ + +extern __inline__ void __delay(int loops) +{ + __asm__ __volatile__( + "call " SYMBOL_NAME_STR(__do_delay) + :/* no outputs */ + :"a" (loops) + :"ax"); +} + +/* + * 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 + * 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 + * a constant) + */ +extern __inline__ void udelay(unsigned long usecs) +{ + usecs *= 0x000010c6; /* 2**32 / 1000000 */ + __asm__("mull %0" + :"=d" (usecs) +#ifdef __SMP__ + :"a" (usecs),"0" (cpu_data[smp_processor_id()].udelay_val) +#else + :"a" (usecs),"0" (loops_per_sec) +#endif + :"ax"); + + __delay(usecs); +} + +extern __inline__ unsigned long muldiv(unsigned long a, unsigned long b, unsigned long c) +{ + __asm__("mull %1 ; divl %2" + :"=a" (a) + :"d" (b), + "r" (c), + "0" (a) + :"dx"); + return a; +} + +#endif /* defined(_I386_DELAY_H) */ |