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#ifndef __PPE42_CACHE_H__
#define __PPE42_CACHE_H__
//-----------------------------------------------------------------------------
// *! (C) Copyright International Business Machines Corp. 2014
// *! All Rights Reserved -- Property of IBM
// *! *** IBM Confidential ***
//-----------------------------------------------------------------------------
/// \file ppe42_cache.h
/// \brief PowerPC-lite (PPE) cache management header for PK
///
/// The data cache flush/invalidate macros defined here create a compiler
/// memory barrier that will cause GCC to flush/invalidate all memory data
/// held in registers before the macro.
#ifndef __ASSEMBLER__
/// Determine cache-alignment of a pointer or byte-count
#define cache_aligned(x) \
((((unsigned long)(x)) & (POW2_32(LOG_CACHE_LINE_SIZE) - 1)) == 0)
/// Cache-align a pointer or byte count. If the 'direction' is <= 0 then we
/// round down, else round up.
#define cache_align(x, direction) \
({ \
unsigned long __x = (unsigned long)(x); \
unsigned long __r; \
if ((direction) <= 0) { \
__r = __x & ~(((unsigned long)CACHE_LINE_SIZE) - 1); \
} else { \
if (__x % CACHE_LINE_SIZE) { \
__r = __x + (CACHE_LINE_SIZE - (__x % CACHE_LINE_SIZE)); \
} \
} \
(void *)__r; \
})
/// Data Cache Block Flush
#define dcbf(p) asm volatile ("dcbf 0, %0" : : "r" (p) : "memory")
/// Data Cache Block Touch
#define dcbt(p) asm volatile ("dcbt 0, %0" : : "r" (p) : "memory")
/// Data Cache Block Invalidate (Privileged)
#define dcbi(p) asm volatile ("dcbi 0, %0" : : "r" (p) : "memory")
void
dcache_invalidate_all(void);
void
dcache_flush_all(void);
void
dcache_invalidate(void *p, size_t bytes);
void
dcache_flush(void *p, size_t bytes);
/// Invalidate a line in the D-cache
///
/// \param p An address withing the cache line to be invalidated.
///
/// The dcache_invalidate_line() API is used to invalidate a single cache line
/// containing the address \a p. Note that invalidation is a destructive
/// operation that may cause the loss of information. It is the caller's
/// responsibility to insure that no useful data is inadverdently invalidated.
/// D-cache invalidation is more-or-less a no-op for data either not in the
/// cache or marked as non-cacheable.
///
/// This API always issues a sync() after the invalidation.
static inline void
dcache_invalidate_line(void *p)
{
dcbi(p);
sync();
}
/// Flush and invalidate a line from the D-cache
///
/// \param p An address within the cache line to be flushed.
///
/// The dcache_flush_line() API can be used as a shortcut to flush and
/// invalidate a single cache line. Note that flushing is not a destructive
/// operation in the sense that no information is lost, however the caller
/// must make sure that the entirity of the data to be flushed is contained in
/// the line that includes the address \a p. D-cache flush is more-or-less a
/// no-op for data either not in the cache or marked as non-cacheable.
///
/// This API always issues a sync() after the flush.
static inline void
dcache_flush_line(void *p)
{
dcbf(p);
sync();
}
#endif /* __ASSEMBLER__ */
#endif /* __PPE42_CAHE_H__ */
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