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| author | Orit Wasserman <owasserm@redhat.com> | 2012-08-06 21:42:50 +0300 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2012-08-08 13:51:12 +0200 |
| commit | 9fb26641ab497eda9138f9af75cbeb02ed59b5ae (patch) | |
| tree | ad4374600d582b27542fc8677048aa3f17f156ed /qemu-common.h | |
| parent | 34c26412b76840e0cab9808047e29aebd429c139 (diff) | |
| download | qemu-9fb26641ab497eda9138f9af75cbeb02ed59b5ae.tar.gz qemu-9fb26641ab497eda9138f9af75cbeb02ed59b5ae.tar.bz2 qemu-9fb26641ab497eda9138f9af75cbeb02ed59b5ae.zip | |
Add cache handling functions
Add MRU page cache mechanism.
The page are accessed by their address.
Signed-off-by: Benoit Hudzia <benoit.hudzia@sap.com>
Signed-off-by: Petter Svard <petters@cs.umu.se>
Signed-off-by: Aidan Shribman <aidan.shribman@sap.com>
Signed-off-by: Orit Wasserman <owasserm@redhat.com>
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'qemu-common.h')
| -rw-r--r-- | qemu-common.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/qemu-common.h b/qemu-common.h index f16079f432..ff7026e377 100644 --- a/qemu-common.h +++ b/qemu-common.h @@ -1,3 +1,4 @@ + /* Common header file that is included by all of qemu. */ #ifndef QEMU_COMMON_H #define QEMU_COMMON_H @@ -428,6 +429,18 @@ static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c) /* Round number up to multiple */ #define QEMU_ALIGN_UP(n, m) QEMU_ALIGN_DOWN((n) + (m) - 1, (m)) +static inline bool is_power_of_2(uint64_t value) +{ + if (!value) { + return 0; + } + + return !(value & (value - 1)); +} + +/* round down to the nearest power of 2*/ +int64_t pow2floor(int64_t value); + #include "module.h" #endif |