diff options
| author | Marek Vasut <marex@denx.de> | 2012-07-15 04:43:47 +0000 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2012-07-18 14:43:14 +0200 |
| commit | de4d11355f70e243f91a49fd15c2004251d8f45b (patch) | |
| tree | a70dc34c45c295b888562330277aac752bcbed33 /include | |
| parent | eec3866e00faf700a4b7d3b30266383914da347f (diff) | |
common.h: Introduce DEFINE_CACHE_ALIGN_BUFFER
This is the out-of-function-scope counterpart of
ALLOC_CACHE_ALIGN_BUFFER.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Tom Rini <trini@ti.com>
[ilya.yanok]: added missing <linux/compiler.h> include and
{DEFINE,ALLOC}_ALIGN_BUFFER macros allowing explicit alignment
specification.
Signed-off-by: Ilya Yanok <ilya.yanok@cogentembedded.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/common.h | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/include/common.h b/include/common.h index d1dd65a851e..be9c278ee80 100644 --- a/include/common.h +++ b/include/common.h @@ -39,6 +39,7 @@ typedef volatile unsigned char vu_char; #include <linux/bitops.h> #include <linux/types.h> #include <linux/string.h> +#include <linux/compiler.h> #include <asm/ptrace.h> #include <stdarg.h> #if defined(CONFIG_PCI) && (defined(CONFIG_4xx) && !defined(CONFIG_AP1000)) @@ -944,11 +945,25 @@ int cpu_release(int nr, int argc, char * const argv[]); * of a function scoped static buffer. It can not be used to create a cache * line aligned global buffer. */ +#define ALLOC_ALIGN_BUFFER(type, name, size, align) \ + char __##name[ROUND(size * sizeof(type), align) + (align - 1)]; \ + \ + type *name = (type *) ALIGN((uintptr_t)__##name, align) #define ALLOC_CACHE_ALIGN_BUFFER(type, name, size) \ - char __##name[ROUND(size * sizeof(type), ARCH_DMA_MINALIGN) + \ - ARCH_DMA_MINALIGN - 1]; \ + ALLOC_ALIGN_BUFFER(type, name, size, ARCH_DMA_MINALIGN) + +/* + * DEFINE_CACHE_ALIGN_BUFFER() is similar to ALLOC_CACHE_ALIGN_BUFFER, but it's + * purpose is to allow allocating aligned buffers outside of function scope. + * Usage of this macro shall be avoided or used with extreme care! + */ +#define DEFINE_ALIGN_BUFFER(type, name, size, align) \ + static char __##name[roundup(size * sizeof(type), align)] \ + __aligned(align); \ \ - type *name = (type *) ALIGN((uintptr_t)__##name, ARCH_DMA_MINALIGN) + static type *name = (type *)__##name +#define DEFINE_CACHE_ALIGN_BUFFER(type, name, size) \ + DEFINE_ALIGN_BUFFER(type, name, size, ARCH_DMA_MINALIGN) /* Pull in stuff for the build system */ #ifdef DO_DEPS_ONLY |