diff options
| author | fishsoupisgood <github@madingley.org> | 2019-04-29 01:17:54 +0100 |
|---|---|---|
| committer | fishsoupisgood <github@madingley.org> | 2019-05-27 03:43:43 +0100 |
| commit | 3f2546b2ef55b661fd8dd69682b38992225e86f6 (patch) | |
| tree | 65ca85f13617aee1dce474596800950f266a456c /roms/ipxe/src/arch/x86_64/include/bits/profile.h | |
| download | qemu-master.tar.gz qemu-master.tar.bz2 qemu-master.zip | |
Diffstat (limited to 'roms/ipxe/src/arch/x86_64/include/bits/profile.h')
| -rw-r--r-- | roms/ipxe/src/arch/x86_64/include/bits/profile.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/roms/ipxe/src/arch/x86_64/include/bits/profile.h b/roms/ipxe/src/arch/x86_64/include/bits/profile.h new file mode 100644 index 00000000..6fc16d84 --- /dev/null +++ b/roms/ipxe/src/arch/x86_64/include/bits/profile.h @@ -0,0 +1,29 @@ +#ifndef _BITS_PROFILE_H +#define _BITS_PROFILE_H + +/** @file + * + * Profiling + * + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#include <stdint.h> + +/** + * Get profiling timestamp + * + * @ret timestamp Timestamp + */ +static inline __attribute__ (( always_inline )) uint64_t +profile_timestamp ( void ) { + uint32_t eax; + uint32_t edx; + + /* Read timestamp counter */ + __asm__ __volatile__ ( "rdtsc" : "=a" ( eax ), "=d" ( edx ) ); + return ( ( ( ( uint64_t ) edx ) << 32 ) | eax ); +} + +#endif /* _BITS_PROFILE_H */ |