Import of Linux/MIPS 1.3.0

1 files changed, 89 insertions, 0 deletions

diff --git a/include/asm-sparc/vac-ops.h b/include/asm-sparc/vac-ops.h
new file mode 100644
index 000000000..18755e048
--- /dev/null
+++ b/include/asm-sparc/vac-ops.h
@@ -0,0 +1,89 @@
+#ifndef _SPARC_VAC_OPS_H
+#define _SPARC_VAC_OPS_H
+
+/* vac-ops.h: Inline assembly routines to do operations on the Sparc
+              VAC (virtual address cache).
+
+   Copyright (C) 1994, David S. Miller (davem@caip.rutgers.edu)
+*/
+
+extern unsigned long *trapbase;
+extern char end, etext, msgbuf;
+
+extern void flush_vac_context(void);
+extern void flush_vac_segment(unsigned int foo_segment);
+extern void flush_vac_page(unsigned int foo_addr);
+
+extern int vac_do_hw_vac_flushes, vac_size, vac_linesize;
+extern int vac_entries_per_context, vac_entries_per_segment;
+extern int vac_entries_per_page;
+
+/* enable_vac() enables the virtual address cache. It returns 0 on
+   success, 1 on failure.
+*/
+
+extern __inline__ int enable_vac(void)
+{
+  int success=0;
+
+  __asm__ __volatile__("lduba [%1] 2, %0\n\t"
+		       "or    %0, 0x10, %0\n\t"
+		       "stba  %0, [%1] 2\n\t"
+		       "or    %%g0, %%g0, %0" :
+		       "=r" (success) :
+		       "r" ((unsigned int) 0x40000000),
+		       "0" (success));
+  return success;
+}
+
+/* disable_vac() disables the virtual address cache. It returns 0 on
+   success, 1 on failure.
+*/
+
+extern __inline__ int disable_vac(void)
+{
+  int success=0;
+
+  __asm__ __volatile__("lduba [%1] 0x2, %0\n\t"
+			"xor   %0, 0x10, %0\n\t"
+			"stba  %0, [%1] 0x2\n\t"
+			"or    %%g0, %%g0, %0" : 
+		       "=r" (success) : 
+		       "r" (0x40000000),
+		       "0" (success));
+  return success;
+}
+
+/* Various one-shot VAC entry flushes on the Sparc */
+
+extern __inline__ void hw_flush_vac_context_entry(char* addr)
+{
+  __asm__ __volatile__("sta %%g0, [%0] 0x7" : : "r" (addr));
+}
+
+extern __inline__ void sw_flush_vac_context_entry(char* addr)
+{
+  __asm__ __volatile__("sta %%g0, [%0] 0xe" : : "r" (addr));
+}
+
+extern __inline__ void hw_flush_vac_segment_entry(char* addr)
+{
+  __asm__ __volatile__("sta %%g0, [%0] 0x5" : : "r" (addr));
+}
+
+extern __inline__ void sw_flush_vac_segment_entry(char* addr)
+{
+  __asm__ __volatile__("sta %%g0, [%0] 0xc" : : "r" (addr));
+}
+
+extern __inline__ void hw_flush_vac_page_entry(unsigned long* addr)
+{
+  __asm__ __volatile__("sta %%g0, [%0] 0x6" : : "r" (addr));
+}
+
+extern __inline__ void sw_flush_vac_page_entry(unsigned long* addr)
+{
+  __asm__ __volatile__("sta %%g0, [%0] 0xd" : : "r" (addr));
+}
+ 
+#endif /* !(_SPARC_VAC_OPS_H) */