diff options
| author | Geoff Levand <geoffrey.levand@am.sony.com> | 2007-01-26 19:08:16 -0800 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-02-07 14:03:18 +1100 |
| commit | 577157659fb0ace3b88dd75e2c6cb1af84b3040d (patch) | |
| tree | 280d3f809a17c8db3ff521d369e3eb63e354f7ac | |
| parent | b1eeb38e456281c37bbfc270a6ca08605b7e7045 (diff) | |
[POWERPC] ps3: fix interrupt bmp
Add a comment and a preprocessor macro to help clearify the alignment
needs of the PS3 interrupt bitmap.
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Acked-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
| -rw-r--r-- | arch/powerpc/platforms/ps3/interrupt.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/ps3/interrupt.c b/arch/powerpc/platforms/ps3/interrupt.c index 3735cd14f61..95b128ba908 100644 --- a/arch/powerpc/platforms/ps3/interrupt.c +++ b/arch/powerpc/platforms/ps3/interrupt.c @@ -48,6 +48,9 @@ * behalf of the guest. These mappings are implemented as 256 bit guest * supplied bitmaps indexed by plug number. The addresses of the bitmaps * are registered with the HV through lv1_configure_irq_state_bitmap(). + * The HV requires that the 512 bits of status + mask not cross a page + * boundary. PS3_BMP_MINALIGN is used to define this minimal 64 byte + * alignment. * * The HV supports 256 plugs per thread, assigned as {0..255}, for a total * of 512 plugs supported on a processor. To simplify the logic this @@ -59,6 +62,8 @@ * can acquire. */ +#define PS3_BMP_MINALIGN 64 + struct ps3_bmp { struct { u64 status; @@ -78,7 +83,7 @@ struct ps3_bmp { */ struct ps3_private { - struct ps3_bmp bmp __attribute__ ((aligned (64))); + struct ps3_bmp bmp __attribute__ ((aligned (PS3_BMP_MINALIGN))); u64 node; unsigned int cpu; }; |