diff options
| author | Eric Anholt <anholt@freebsd.org> | 2003-04-26 23:32:00 +0000 |
|---|---|---|
| committer | Eric Anholt <anholt@freebsd.org> | 2003-04-26 23:32:00 +0000 |
| commit | 766a1da2e5841959246abab9cf27c79d75636129 (patch) | |
| tree | 67b55933353dec843e44540882c61b87e81c8b88 /bsd-core/drm_os_netbsd.h | |
| parent | a172ee2a18b715a6de9b8e914aecd8414a4f3b2d (diff) | |
Remove the map argument from DRM_*MEMORYBARRIER. Not all of the uses of
DRM_*MEMORYBARRIER we had were related to an MMIO space. This means
arch-specific code on the BSDs, unfortunately. Also add
DRM_MEMORYBARRIER() and change the DRM_READMEMORYBARRIER()s that used
to be read/write barriers to it.
Diffstat (limited to 'bsd-core/drm_os_netbsd.h')
| -rw-r--r-- | bsd-core/drm_os_netbsd.h | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/bsd-core/drm_os_netbsd.h b/bsd-core/drm_os_netbsd.h index 7a6f9821..246ebdc6 100644 --- a/bsd-core/drm_os_netbsd.h +++ b/bsd-core/drm_os_netbsd.h @@ -94,7 +94,6 @@ extern const int DRM(M_DRM) = M_DEVBUF; #endif /* __NetBSD_Version__ */ #define DRM_MALLOC(size) malloc( size, DRM(M_DRM), M_NOWAIT ) #define DRM_FREE(pt,size) free( pt, DRM(M_DRM) ) -#define DRM_VTOPHYS(addr) vtophys(addr) #define DRM_READ8(map, offset) bus_space_read_1( (map)->iot, (map)->ioh, (offset) ) #define DRM_READ32(map, offset) bus_space_read_4( (map)->iot, (map)->ioh, (offset) ) @@ -173,10 +172,21 @@ while (!condition) { \ #define DRM_GET_USER_UNCHECKED(val, uaddr) \ ((val) = fuword(uaddr), 0) -#define DRM_WRITEMEMORYBARRIER( map ) \ - bus_space_barrier((map)->iot, (map)->ioh, 0, (map)->size, 0); -#define DRM_READMEMORYBARRIER( map ) \ - bus_space_barrier((map)->iot, (map)->ioh, 0, (map)->size, BUS_SPACE_BARRIER_READ); +/* DRM_READMEMORYBARRIER() prevents reordering of reads. + * DRM_WRITEMEMORYBARRIER() prevents reordering of writes. + * DRM_MEMORYBARRIER() prevents reordering of reads and writes. + */ +#if defined(__i386__) +#define DRM_READMEMORYBARRIER() __asm __volatile( \ + "lock; addl $0,0(%%esp)" : : : "memory"); +#define DRM_WRITEMEMORYBARRIER() __asm __volatile("" : : : "memory"); +#define DRM_MEMORYBARRIER() __asm __volatile( \ + "lock; addl $0,0(%%esp)" : : : "memory"); +#elif defined(__alpha__) +#define DRM_READMEMORYBARRIER() alpha_mb(); +#define DRM_WRITEMEMORYBARRIER() alpha_wmb(); +#define DRM_MEMORYBARRIER() alpha_mb(); +#endif #define DRM_WAKEUP(w) wakeup((void *)w) #define DRM_WAKEUP_INT(w) wakeup(w) |