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mips: Heavily rework DMA & caching code

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Based on code originally written by Amaury Pouly (g#1789, g#1791, g#1527)
but rebased and heavily updated.

Change-Id: Ic794abb5e8d89feb4b88fc3abe854270fb28db70
This commit is contained in:
Solomon Peachy 2020-08-28 21:45:58 -04:00
parent 1ae8213a64
commit 0cb162a76b
16 changed files with 188 additions and 129 deletions
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28
firmware/target/mips/mmu-mips.h
View file

@ -28,19 +28,25 @@ void map_address(unsigned long virtual, unsigned long physical,
unsigned long length, unsigned int cache_flags);
void mmu_init(void);
#define HAVE_CPUCACHE_INVALIDATE
//#define HAVE_CPUCACHE_FLUSH
/* Commits entire DCache */
void commit_dcache(void);
/* Commit and discard entire DCache, will do writeback */
void commit_discard_dcache(void);
void __idcache_invalidate_all(void);
void __icache_invalidate_all(void);
void __dcache_invalidate_all(void);
void __dcache_writeback_all(void);
/* Write DCache back to RAM for the given range and remove cache lines
* from DCache afterwards */
void commit_discard_dcache_range(const void *base, unsigned int size);
void dma_cache_wback_inv(unsigned long addr, unsigned long size);
/* Write DCache back to RAM for the given range */
void commit_dcache_range(const void *base, unsigned int size);
#define commit_discard_idcache __idcache_invalidate_all
#define commit_discard_icache __icache_invalidate_all
#define commit_discard_dcache __dcache_invalidate_all
#define commit_dcache __dcache_writeback_all
/*
* Remove cache lines for the given range from DCache
* will *NOT* do write back except for buffer edges not on a line boundary
*/
void discard_dcache_range(const void *base, unsigned int size);
/* Discards the entire ICache, and commit+discards the entire DCache */
void commit_discard_idcache(void);
#endif /* __MMU_MIPS_INCLUDE_H */