diff options
Diffstat (limited to 'lib/libstand/zalloc_defs.h')
| -rw-r--r-- | lib/libstand/zalloc_defs.h | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/lib/libstand/zalloc_defs.h b/lib/libstand/zalloc_defs.h index 5331ee0..7f2cc12 100644 --- a/lib/libstand/zalloc_defs.h +++ b/lib/libstand/zalloc_defs.h @@ -52,18 +52,26 @@ #define BLKEXTENDMASK (BLKEXTEND - 1) /* - * required malloc alignment. Just hardwire to 16. + * Required malloc alignment. * - * Note: if we implement a more sophisticated realloc, we should ensure that - * MALLOCALIGN is at least as large as MemNode. + * Embedded platforms using the u-boot API drivers require that all I/O buffers + * be on a cache line sized boundary. The worst case size for that is 64 bytes. + * For other platforms, 16 bytes works fine. The alignment also must be at + * least sizeof(struct MemNode); this is asserted in zalloc.c. */ +#if defined(__arm__) || defined(__mips__) || defined(__powerpc__) +#define MALLOCALIGN 64 +#else +#define MALLOCALIGN 16 +#endif +#define MALLOCALIGN_MASK (MALLOCALIGN - 1) + typedef struct Guard { size_t ga_Bytes; size_t ga_Magic; /* must be at least 32 bits */ } Guard; -#define MALLOCALIGN 16 #define GAMAGIC 0x55FF44FD #define GAFREE 0x5F54F4DF |
