28#include <l4/sys/l4int.h>
171 __asm__ __volatile__ (
"rdtsc" :
"=a"(lo),
"=d"(hi));
181 __asm__ __volatile__ (
"rdpmc" :
"=a"(lo),
"=d"(hi) :
"c"(ecx));
191 __asm__ __volatile__ (
"rdtsc" :
"=a"(lo),
"=d"(hi));
201 __asm__ __volatile__ (
"rdpmc" :
"=a"(lo),
"=d"(hi) :
"c"(ecx));
213 "shrd $27, %%rdx, %%rax \n\t"
214 :
"=a" (ns),
"=d"(dummy)
227 "shrd $32, %%rdx, %%rax \n\t"
228 :
"=a" (ns),
"=d" (dummy)
240 "shrd $27, %%rdx, %%rax \n\t"
241 "xorq %%rdx, %%rdx \n\t"
243 :
"=a" (*s),
"=&d" (*ns)
244 :
"a" (tsc),
"r" ((
l4_uint64_t)l4_scaler_tsc_to_ns),
256 "shrd $27, %%rdx, %%rax \n\t"
257 :
"=a" (tsc),
"=d" (dummy)
L4 compiler related defines.
unsigned long l4_umword_t
Unsigned machine word.
l4_uint64_t l4_cpu_time_t
CPU clock type.
unsigned int l4_uint32_t
Unsigned 32bit value.
unsigned long long l4_uint64_t
Unsigned 64bit value.
#define L4_CV
Define calling convention.
#define L4_INLINE
L4 Inline function attribute.
#define EXTERN_C_BEGIN
Start section with C types and functions.
#define EXTERN_C_END
End section with C types and functions.
void l4_tsc_to_s_and_ns(l4_cpu_time_t tsc, l4_uint32_t *s, l4_uint32_t *ns)
Convert timestamp to s.ns value.
l4_uint32_t l4_get_hz(void)
Get CPU frequency in Hz.
l4_uint32_t l4_tsc_init(l4_kernel_info_t const *kip)
Initialize scaler for TSC calibrations from the kernel.
l4_uint64_t l4_tsc_to_ns(l4_cpu_time_t tsc)
Convert timestamp to ns value.
l4_uint64_t l4_tsc_to_us(l4_cpu_time_t tsc)
Convert timestamp into micro seconds value.
l4_uint32_t l4_calibrate_tsc(l4_kernel_info_t const *kip)
Determine scalers for timestamp calculations.
l4_cpu_time_t l4_rdtsc(void)
Read current value of CPU-internal timestamp counter.
l4_cpu_time_t l4_ns_to_tsc(l4_uint64_t ns)
Convert nano seconds into CPU ticks.
void l4_busy_wait_us(l4_uint64_t us)
Wait busy for a small amount of time.
l4_uint32_t l4_rdpmc_32(int ecx)
Return the least significant 32 bit of a performance counter.
l4_uint64_t l4_rdpmc(int ecx)
Return current value of CPU-internal performance measurement counter.
void l4_busy_wait_ns(l4_uint64_t ns)
Wait busy for a small amount of time.
l4_uint32_t l4_rdtsc_32(void)
Read the lest significant 32 bit of the TSC.
L4 Kernel Interface Page.
Kernel Info Page access functions.