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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.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15523 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2007-11-08 05:17:20 +00:00
parent 194a66ef83
commit 57d71e4267
8 changed files with 87 additions and 5 deletions
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15
apps/plugin.h
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@ -37,6 +37,7 @@
#include "config.h"
#include "system.h"
#include "dir.h"
#include "general.h"
#include "kernel.h"
#include "thread.h"
#include "button.h"
@ -112,7 +113,7 @@
#define PLUGIN_MAGIC 0x526F634B /* RocK */
/* increase this every time the api struct changes */
#define PLUGIN_API_VERSION 88
#define PLUGIN_API_VERSION 89
/* update this to latest version if a change to the api struct breaks
backwards compatibility (and please take the opportunity to sort in any
@ -640,6 +641,10 @@ struct plugin_api {
#endif
void (*thread_wait)(struct thread_entry *thread);
#ifdef PROC_NEEDS_CACHEALIGN
size_t (*align_buffer)(void **start, size_t size, size_t align);
#endif
};
/* plugin header */
@ -742,4 +747,12 @@ enum plugin_status plugin_start(struct plugin_api* rockbox, void* parameter)
#endif /* CACHE_FUNCTION_WRAPPERS */
#ifndef ALIGN_BUFFER_WRAPPER
#define ALIGN_BUFFER_WRAPPER(api) \
size_t align_buffer(void **start, size_t size, size_t align) \
{ \
return (api)->align_buffer(start, size, align); \
}
#endif /* ALIGN_BUFFER_WRAPPER */
#endif