arch/parisc/include/asm/cache.h

   1 /*
   2  * include/asm-parisc/cache.h
   3  */
   4
   5 #ifndef __ARCH_PARISC_CACHE_H
   6 #define __ARCH_PARISC_CACHE_H
   7
   8
   9 /*
  10  * PA 2.0 processors have 64-byte cachelines; PA 1.1 processors have
  11  * 32-byte cachelines.  The default configuration is not for SMP anyway,
  12  * so if you're building for SMP, you should select the appropriate
  13  * processor type.  There is a potential livelock danger when running
  14  * a machine with this value set too small, but it's more probable you'll
  15  * just ruin performance.
  16  */
  17 #ifdef CONFIG_PA20
  18 #define L1_CACHE_BYTES 64
  19 #define L1_CACHE_SHIFT 6
  20 #else
  21 #define L1_CACHE_BYTES 32
  22 #define L1_CACHE_SHIFT 5
  23 #endif
  24
  25 #ifndef __ASSEMBLY__
  26
  27 #define L1_CACHE_ALIGN(x)       (((x)+(L1_CACHE_BYTES-1))&~(L1_CACHE_BYTES-1))
  28
  29 #define SMP_CACHE_BYTES L1_CACHE_BYTES
  30
  31 #define ARCH_DMA_MINALIGN       L1_CACHE_BYTES
  32
  33 #define __read_mostly __attribute__((__section__(".data..read_mostly")))
  34
  35 void parisc_cache_init(void);   /* initializes cache-flushing */
  36 void disable_sr_hashing_asm(int); /* low level support for above */
  37 void disable_sr_hashing(void);   /* turns off space register hashing */
  38 void free_sid(unsigned long);
  39 unsigned long alloc_sid(void);
  40
  41 struct seq_file;
  42 extern void show_cache_info(struct seq_file *m);
  43
  44 extern int split_tlb;
  45 extern int dcache_stride;
  46 extern int icache_stride;
  47 extern struct pdc_cache_info cache_info;
  48 void parisc_setup_cache_timing(void);
  49
  50 #define pdtlb(addr)         asm volatile("pdtlb 0(%%sr1,%0)" : : "r" (addr));
  51 #define pitlb(addr)         asm volatile("pitlb 0(%%sr1,%0)" : : "r" (addr));
  52 #define pdtlb_kernel(addr)  asm volatile("pdtlb 0(%0)" : : "r" (addr));
  53
  54 #endif /* ! __ASSEMBLY__ */
  55
  56 /* Classes of processor wrt: disabling space register hashing */
  57
  58 #define SRHASH_PCXST    0   /* pcxs, pcxt, pcxt_ */
  59 #define SRHASH_PCXL     1   /* pcxl */
  60 #define SRHASH_PA20     2   /* pcxu, pcxu_, pcxw, pcxw_ */
  61
  62 #endif