include/asm-parisc/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 __read_mostly __attribute__((__section__(".data.read_mostly")))
  32
  33 extern void flush_data_cache_local(void *);  /* flushes local data-cache only */
  34 extern void flush_instruction_cache_local(void *); /* flushes local code-cache only */
  35 #ifdef CONFIG_SMP
  36 extern void flush_data_cache(void); /* flushes data-cache only (all processors) */
  37 extern void flush_instruction_cache(void); /* flushes i-cache only (all processors) */
  38 #else
  39 #define flush_data_cache() flush_data_cache_local(NULL)
  40 #define flush_instruction_cache() flush_instruction_cache_local(NULL)
  41 #endif
  42
  43 extern void parisc_cache_init(void);    /* initializes cache-flushing */
  44 extern void flush_all_caches(void);     /* flush everything (tlb & cache) */
  45 extern int get_cache_info(char *);
  46 extern void flush_user_icache_range_asm(unsigned long, unsigned long);
  47 extern void flush_kernel_icache_range_asm(unsigned long, unsigned long);
  48 extern void flush_user_dcache_range_asm(unsigned long, unsigned long);
  49 extern void flush_kernel_dcache_range_asm(unsigned long, unsigned long);
  50 extern void flush_kernel_dcache_page_asm(void *);
  51 extern void flush_kernel_icache_page(void *);
  52 extern void disable_sr_hashing(void);   /* turns off space register hashing */
  53 extern void disable_sr_hashing_asm(int); /* low level support for above */
  54 extern void free_sid(unsigned long);
  55 unsigned long alloc_sid(void);
  56 extern void flush_user_dcache_page(unsigned long);
  57 extern void flush_user_icache_page(unsigned long);
  58
  59 struct seq_file;
  60 extern void show_cache_info(struct seq_file *m);
  61
  62 extern int split_tlb;
  63 extern int dcache_stride;
  64 extern int icache_stride;
  65 extern struct pdc_cache_info cache_info;
  66
  67 #define pdtlb(addr)         asm volatile("pdtlb 0(%%sr1,%0)" : : "r" (addr));
  68 #define pitlb(addr)         asm volatile("pitlb 0(%%sr1,%0)" : : "r" (addr));
  69 #define pdtlb_kernel(addr)  asm volatile("pdtlb 0(%0)" : : "r" (addr));
  70
  71 #endif /* ! __ASSEMBLY__ */
  72
  73 /* Classes of processor wrt: disabling space register hashing */
  74
  75 #define SRHASH_PCXST    0   /* pcxs, pcxt, pcxt_ */
  76 #define SRHASH_PCXL     1   /* pcxl */
  77 #define SRHASH_PA20     2   /* pcxu, pcxu_, pcxw, pcxw_ */
  78
  79 #endif