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 #include <linux/config.h>
   9
  10 /*
  11  * PA 2.0 processors have 64-byte cachelines; PA 1.1 processors have
  12  * 32-byte cachelines.  The default configuration is not for SMP anyway,
  13  * so if you're building for SMP, you should select the appropriate
  14  * processor type.  There is a potential livelock danger when running
  15  * a machine with this value set too small, but it's more probable you'll
  16  * just ruin performance.
  17  */
  18 #ifdef CONFIG_PA20
  19 #define L1_CACHE_BYTES 64
  20 #define L1_CACHE_SHIFT 6
  21 #else
  22 #define L1_CACHE_BYTES 32
  23 #define L1_CACHE_SHIFT 5
  24 #endif
  25
  26 #ifndef __ASSEMBLY__
  27
  28 #define L1_CACHE_ALIGN(x)       (((x)+(L1_CACHE_BYTES-1))&~(L1_CACHE_BYTES-1))
  29
  30 #define SMP_CACHE_BYTES L1_CACHE_BYTES
  31
  32 #define __read_mostly __attribute__((__section__(".data.read_mostly")))
  33
  34 extern void flush_data_cache_local(void *);  /* flushes local data-cache only */
  35 extern void flush_instruction_cache_local(void *); /* flushes local code-cache only */
  36 #ifdef CONFIG_SMP
  37 extern void flush_data_cache(void); /* flushes data-cache only (all processors) */
  38 extern void flush_instruction_cache(void); /* flushes i-cache only (all processors) */
  39 #else
  40 #define flush_data_cache() flush_data_cache_local(NULL)
  41 #define flush_instruction_cache() flush_instruction_cache_local(NULL)
  42 #endif
  43
  44 extern void parisc_cache_init(void);    /* initializes cache-flushing */
  45 extern void flush_all_caches(void);     /* flush everything (tlb & cache) */
  46 extern int get_cache_info(char *);
  47 extern void flush_user_icache_range_asm(unsigned long, unsigned long);
  48 extern void flush_kernel_icache_range_asm(unsigned long, unsigned long);
  49 extern void flush_user_dcache_range_asm(unsigned long, unsigned long);
  50 extern void flush_kernel_dcache_range_asm(unsigned long, unsigned long);
  51 extern void flush_kernel_dcache_page_asm(void *);
  52 extern void flush_kernel_icache_page(void *);
  53 extern void disable_sr_hashing(void);   /* turns off space register hashing */
  54 extern void disable_sr_hashing_asm(int); /* low level support for above */
  55 extern void free_sid(unsigned long);
  56 unsigned long alloc_sid(void);
  57 extern void flush_user_dcache_page(unsigned long);
  58 extern void flush_user_icache_page(unsigned long);
  59
  60 struct seq_file;
  61 extern void show_cache_info(struct seq_file *m);
  62
  63 extern int split_tlb;
  64 extern int dcache_stride;
  65 extern int icache_stride;
  66 extern struct pdc_cache_info cache_info;
  67
  68 #define pdtlb(addr)         asm volatile("pdtlb 0(%%sr1,%0)" : : "r" (addr));
  69 #define pitlb(addr)         asm volatile("pitlb 0(%%sr1,%0)" : : "r" (addr));
  70 #define pdtlb_kernel(addr)  asm volatile("pdtlb 0(%0)" : : "r" (addr));
  71
  72 #endif /* ! __ASSEMBLY__ */
  73
  74 /* Classes of processor wrt: disabling space register hashing */
  75
  76 #define SRHASH_PCXST    0   /* pcxs, pcxt, pcxt_ */
  77 #define SRHASH_PCXL     1   /* pcxl */
  78 #define SRHASH_PA20     2   /* pcxu, pcxu_, pcxw, pcxw_ */
  79
  80 #endif