1 files changed, 79 insertions, 0 deletions

diff --git a/include/asm-parisc/cache.h b/include/asm-parisc/cache.h
new file mode 100644
index 000000000000..5da72e38bdde
--- /dev/null
+++ b/include/asm-parisc/cache.h
@@ -0,0 +1,79 @@
+/*
+ * include/asm-parisc/cache.h
+ */
+
+#ifndef __ARCH_PARISC_CACHE_H
+#define __ARCH_PARISC_CACHE_H
+
+#include <linux/config.h>
+
+/*
+ * PA 2.0 processors have 64-byte cachelines; PA 1.1 processors have
+ * 32-byte cachelines.  The default configuration is not for SMP anyway,
+ * so if you're building for SMP, you should select the appropriate
+ * processor type.  There is a potential livelock danger when running
+ * a machine with this value set too small, but it's more probable you'll
+ * just ruin performance.
+ */
+#ifdef CONFIG_PA20
+#define L1_CACHE_BYTES 64
+#define L1_CACHE_SHIFT 6
+#else
+#define L1_CACHE_BYTES 32
+#define L1_CACHE_SHIFT 5
+#endif
+
+#ifndef __ASSEMBLY__
+
+#define L1_CACHE_ALIGN(x)       (((x)+(L1_CACHE_BYTES-1))&~(L1_CACHE_BYTES-1))
+
+#define SMP_CACHE_BYTES L1_CACHE_BYTES
+#define L1_CACHE_SHIFT_MAX 5    /* largest L1 which this arch supports */
+
+extern void flush_data_cache_local(void);  /* flushes local data-cache only */
+extern void flush_instruction_cache_local(void); /* flushes local code-cache only */
+#ifdef CONFIG_SMP
+extern void flush_data_cache(void); /* flushes data-cache only (all processors) */
+extern void flush_instruction_cache(void); /* flushes i-cache only (all processors) */
+#else
+#define flush_data_cache flush_data_cache_local
+#define flush_instruction_cache flush_instruction_cache_local
+#endif
+
+extern void parisc_cache_init(void);    /* initializes cache-flushing */
+extern void flush_all_caches(void);     /* flush everything (tlb & cache) */
+extern int get_cache_info(char *);
+extern void flush_user_icache_range_asm(unsigned long, unsigned long);
+extern void flush_kernel_icache_range_asm(unsigned long, unsigned long);
+extern void flush_user_dcache_range_asm(unsigned long, unsigned long);
+extern void flush_kernel_dcache_range_asm(unsigned long, unsigned long);
+extern void flush_kernel_dcache_page(void *);
+extern void flush_kernel_icache_page(void *);
+extern void disable_sr_hashing(void);   /* turns off space register hashing */
+extern void disable_sr_hashing_asm(int); /* low level support for above */
+extern void free_sid(unsigned long);
+unsigned long alloc_sid(void);
+extern void flush_user_dcache_page(unsigned long);
+extern void flush_user_icache_page(unsigned long);
+
+struct seq_file;
+extern void show_cache_info(struct seq_file *m);
+
+extern int split_tlb;
+extern int dcache_stride;
+extern int icache_stride;
+extern struct pdc_cache_info cache_info;
+
+#define pdtlb(addr)         asm volatile("pdtlb 0(%%sr1,%0)" : : "r" (addr));
+#define pitlb(addr)         asm volatile("pitlb 0(%%sr1,%0)" : : "r" (addr));
+#define pdtlb_kernel(addr)  asm volatile("pdtlb 0(%0)" : : "r" (addr));
+
+#endif /* ! __ASSEMBLY__ */
+
+/* Classes of processor wrt: disabling space register hashing */
+
+#define SRHASH_PCXST    0   /* pcxs, pcxt, pcxt_ */
+#define SRHASH_PCXL     1   /* pcxl */
+#define SRHASH_PA20     2   /* pcxu, pcxu_, pcxw, pcxw_ */
+
+#endif