7896bfa451
Architectures that handle DMA-non-coherent memory need to set ARCH_DMA_MINALIGN to make sure that kmalloc'ed buffer is DMA-safe: the buffer doesn't share a cache with the others. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Helge Deller <deller@gmx.de> Cc: James E.J. Bottomley <jejb@parisc-linux.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
/*
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* include/asm-parisc/cache.h
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*/
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#ifndef __ARCH_PARISC_CACHE_H
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#define __ARCH_PARISC_CACHE_H
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/*
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* PA 2.0 processors have 64-byte cachelines; PA 1.1 processors have
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* 32-byte cachelines. The default configuration is not for SMP anyway,
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* so if you're building for SMP, you should select the appropriate
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* processor type. There is a potential livelock danger when running
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* a machine with this value set too small, but it's more probable you'll
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* just ruin performance.
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*/
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#ifdef CONFIG_PA20
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#define L1_CACHE_BYTES 64
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#define L1_CACHE_SHIFT 6
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#else
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#define L1_CACHE_BYTES 32
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#define L1_CACHE_SHIFT 5
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#endif
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#ifndef __ASSEMBLY__
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#define L1_CACHE_ALIGN(x) (((x)+(L1_CACHE_BYTES-1))&~(L1_CACHE_BYTES-1))
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#define SMP_CACHE_BYTES L1_CACHE_BYTES
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#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
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#define __read_mostly __attribute__((__section__(".data..read_mostly")))
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void parisc_cache_init(void); /* initializes cache-flushing */
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void disable_sr_hashing_asm(int); /* low level support for above */
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void disable_sr_hashing(void); /* turns off space register hashing */
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void free_sid(unsigned long);
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unsigned long alloc_sid(void);
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struct seq_file;
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extern void show_cache_info(struct seq_file *m);
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extern int split_tlb;
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extern int dcache_stride;
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extern int icache_stride;
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extern struct pdc_cache_info cache_info;
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void parisc_setup_cache_timing(void);
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#define pdtlb(addr) asm volatile("pdtlb 0(%%sr1,%0)" : : "r" (addr));
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#define pitlb(addr) asm volatile("pitlb 0(%%sr1,%0)" : : "r" (addr));
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#define pdtlb_kernel(addr) asm volatile("pdtlb 0(%0)" : : "r" (addr));
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#endif /* ! __ASSEMBLY__ */
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/* Classes of processor wrt: disabling space register hashing */
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#define SRHASH_PCXST 0 /* pcxs, pcxt, pcxt_ */
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#define SRHASH_PCXL 1 /* pcxl */
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#define SRHASH_PA20 2 /* pcxu, pcxu_, pcxw, pcxw_ */
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#endif
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