43 lines
1.2 KiB
ArmAsm
43 lines
1.2 KiB
ArmAsm
|
/* */
|
||
|
|
/* sections */
|
||
|
|
#include <machine/asm.h>
|
||
|
|
|
||
|
|
/**===========================================================================* */
|
||
|
|
/* PUBLIC void read_tsc(unsigned long *high, unsigned long *low); */
|
||
|
|
/* Read the cycle counter of the CPU. Pentium and up. */
|
||
|
|
ENTRY(read_tsc)
|
||
|
|
push %edx
|
||
|
|
push %eax
|
||
|
|
.byte 0x0f /* this is the RDTSC instruction */
|
||
|
|
.byte 0x31 /* it places the TSC in EDX:EAX */
|
||
|
|
push %ebp
|
||
|
|
movl 16(%esp), %ebp
|
||
|
|
movl %edx, (%ebp)
|
||
|
|
movl 20(%esp), %ebp
|
||
|
|
movl %eax, (%ebp)
|
||
|
|
pop %ebp
|
||
|
|
pop %eax
|
||
|
|
pop %edx
|
||
|
|
ret
|
||
|
|
|
||
|
|
/**===========================================================================* */
|
||
|
|
/* PUBLIC void read_host_time_ns(unsigned long *high, unsigned long *low); */
|
||
|
|
/* access real time in ns from host in vmware. */
|
||
|
|
ENTRY(read_host_time_ns)
|
||
|
|
pushl %edx
|
||
|
|
pushl %eax
|
||
|
|
pushl %ecx
|
||
|
|
movl $0x10001, %ecx
|
||
|
|
.byte 0x0f /* this is the RDTSC instruction */
|
||
|
|
.byte 0x31 /* it places the TSC in EDX:EAX */
|
||
|
|
pushl %ebp
|
||
|
|
movl 20(%esp), %ebp
|
||
|
|
movl %edx, (%ebp)
|
||
|
|
movl 24(%esp), %ebp
|
||
|
|
movl %eax, (%ebp)
|
||
|
|
popl %ebp
|
||
|
|
popl %ecx
|
||
|
|
popl %eax
|
||
|
|
popl %edx
|
||
|
|
ret
|