Add some CACHEALIGN_* macros and a helper function to assist in aligning data and buffers on PortalPlayer processors to cache line boundaries. They're noops when PROC_NEED_CACHEALIGN isn't defined. Go safe and increase the value to 32 since I'm not sure yet if 16 is sufficient - changing that is a one-liner. Add helper to plugin API which will be needed shortly.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15523 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 2 insertions, 0 deletions

diff --git a/firmware/export/general.h b/firmware/export/general.h
index 427e2773b8..f4ea9e206a 100644
--- a/firmware/export/general.h
+++ b/firmware/export/general.h
@@ -21,6 +21,7 @@
 #define GENERAL_H
 
 #include <stdbool.h>
+#include <stddef.h>
 
 /* round a signed/unsigned 32bit value to the closest of a list of values */
 /* returns the index of the closest value */
@@ -34,5 +35,6 @@ int make_list_from_caps32(unsigned long src_mask,
                           unsigned long caps_mask,
                           unsigned long *caps_list);
 
+size_t align_buffer(void **start, size_t size, size_t align);
 
 #endif /* GENERAL_H */