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. let kernel use read_tsc() from sysutil library

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. read_tsc() in sysutil library saves edx and eax now
 . added read_tsc_64() by Antonio Mancina to load tsc into
   a 64-bit data type directly
 . deleted read_tsc.h in favour of a prototype in <minix/syslib.h>
This commit is contained in:
Ben Gras 2007-03-08 15:39:14 +00:00
parent 4148c24393
commit 6d50591226
7 changed files with 28 additions and 29 deletions
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5
include/minix/syslib.h
View file

@ -11,6 +11,8 @@
#include <minix/ipc.h>
#endif
#include <minix/u64.h>
#ifndef _DEVIO_H
#include <minix/devio.h>
#endif
@ -205,6 +207,9 @@ _PROTOTYPE( int sys_cprof, (int action, int size, int endpt,
void *ctl_ptr, void *mem_ptr) );
_PROTOTYPE( int sys_profbuf, (void *ctl_ptr, void *mem_ptr) );
/* read_tsc() and friends. */
_PROTOTYPE( void read_tsc_64, (u64_t *t) );
_PROTOTYPE( void read_tsc, (u32_t *hi, u32_t *lo) );
#endif /* _SYSLIB_H */

19
kernel/arch/i386/klib386.s
View file

@ -32,7 +32,6 @@
.define _reset ! reset the system
.define _idle_task ! task executed when there is no work
.define _level0 ! call a function at level 0
.define _read_tsc ! read the cycle counter (Pentium and up)
.define _read_cpu_flags ! read the cpu flags
.define _read_cr0 ! read cr0
.define _write_cr0 ! write a value in cr0
@ -547,24 +546,6 @@ _level0:
ret
!*===========================================================================*
!* read_tsc *
!*===========================================================================*
! PUBLIC void read_tsc(unsigned long *high, unsigned long *low);
! Read the cycle counter of the CPU. Pentium and up.
! This function clobbers edx and eax.
.align 16
_read_tsc:
.data1 0x0f ! this is the RDTSC instruction
.data1 0x31 ! it places the TSC in EDX:EAX
push ebp
mov ebp, 8(esp)
mov (ebp), edx
mov ebp, 12(esp)
mov (ebp), eax
pop ebp
ret
!*===========================================================================*
!* read_flags *
!*===========================================================================*

1
lib/sysutil/Makefile.in
View file

@ -18,6 +18,7 @@ libsysutil_FILES=" \
report.c \
taskcall.c \
read_tsc.s \
read_tsc_64.c \
profile_extern.c \
profile.c"

1
lib/sysutil/profile.c
View file

@ -20,7 +20,6 @@
#include <minix/profile.h>
#include <minix/syslib.h>
#include <minix/u64.h>
#include "read_tsc.h"
#define U64_LO 0
#define U64_HI 1

7
lib/sysutil/read_tsc.h
View file

@ -1,7 +0,0 @@
#ifndef READ_TSC_H
#define READ_TSC_H
_PROTOTYPE(void read_tsc, (unsigned long *hi, unsigned long *lo) );
#endif /* READ_TSC_H */

8
lib/sysutil/read_tsc.s
View file

@ -11,13 +11,17 @@
! Read the cycle counter of the CPU. Pentium and up.
.align 16
_read_tsc:
push edx
push eax
.data1 0x0f ! this is the RDTSC instruction
.data1 0x31 ! it places the TSC in EDX:EAX
push ebp
mov ebp, 8(esp)
mov ebp, 16(esp)
mov (ebp), edx
mov ebp, 12(esp)
mov ebp, 20(esp)
mov (ebp), eax
pop ebp
pop eax
pop edx
ret

16
lib/sysutil/read_tsc_64.c Normal file
View file

@ -0,0 +1,16 @@
#include "sysutil.h"
#include <minix/u64.h>
#include <minix/syslib.h>
/* Utility function to work directly with u64_t
* By Antonio Mancina
*/
PUBLIC void read_tsc_64(t)
u64_t* t;
{
u32_t lo, hi;
read_tsc (&hi, &lo);
*t = make64 (lo, hi);
}