Import of Linux/MIPS 2.1.36

1 files changed, 281 insertions, 0 deletions

diff --git a/include/asm-sparc64/spitfire.h b/include/asm-sparc64/spitfire.h
new file mode 100644
index 000000000..10918dc82
--- /dev/null
+++ b/include/asm-sparc64/spitfire.h
@@ -0,0 +1,281 @@
+/* $Id: spitfire.h,v 1.7 1997/04/04 00:50:29 davem Exp $
+ * spitfire.h: SpitFire/BlackBird/Cheetah inline MMU operations.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#ifndef _SPARC64_SPITFIRE_H
+#define _SPARC64_SPITFIRE_H
+
+#include <asm/asi.h>
+
+/* The following register addresses are accessible via ASI_DMMU
+ * and ASI_IMMU, that is there is a distinct and unique copy of
+ * each these registers for each TLB.
+ */
+#define TSB_TAG_TARGET		0x0000000000000000
+#define TLB_SFSR		0x0000000000000018
+#define TSB_REG			0x0000000000000028
+#define TLB_TAG_ACCESS		0x0000000000000030
+
+/* These registers only exist as one entity, and are accessed
+ * via ASI_DMMU only.
+ */
+#define PRIMARY_CONTEXT		0x0000000000000008
+#define SECONDARY_CONTEXT	0x0000000000000010
+#define DMMU_SFAR		0x0000000000000020
+#define VIRT_WATCHPOINT		0x0000000000000038
+#define PHYS_WATCHPOINT		0x0000000000000040
+
+#ifndef __ASSEMBLY__
+
+extern __inline__ unsigned long spitfire_get_isfsr(void)
+{
+	unsigned long ret;
+
+	__asm__ __volatile__("ldxa	[%1] %2, %0"
+			     : "=r" (ret)
+			     : "r" (TLB_SFSR), "i" (ASI_IMMU));
+	return ret;
+}
+
+extern __inline__ unsigned long spitfire_get_dsfsr(void)
+{
+	unsigned long ret;
+
+	__asm__ __volatile__("ldxa	[%1] %2, %0"
+			     : "=r" (ret)
+			     : "r" (TLB_SFSR), "i" (ASI_DMMU));
+	return ret;
+}
+
+extern __inline__ unsigned long spitfire_get_sfar(void)
+{
+	unsigned long ret;
+
+	__asm__ __volatile__("ldxa	[%1] %2, %0"
+			     : "=r" (ret)
+			     : "r" (DMMU_SFAR), "i" (ASI_DMMU));
+	return ret;
+}
+
+extern __inline__ void spitfire_put_isfsr(unsigned long sfsr)
+{
+	__asm__ __volatile__("stxa	%0, [%1] %2" :
+			     : "r" (sfsr), "r" (TLB_SFSR), "i" (ASI_IMMU));
+}
+
+extern __inline__ void spitfire_put_dsfsr(unsigned long sfsr)
+{
+	__asm__ __volatile__("stxa	%0, [%1] %2" :
+			     : "r" (sfsr), "r" (TLB_SFSR), "i" (ASI_DMMU));
+}
+
+extern __inline__ unsigned long spitfire_get_primary_context(void)
+{
+	unsigned long ctx;
+
+	__asm__ __volatile__("ldxa	[%1] %2, %0"
+			     : "=r" (ctx)
+			     : "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
+	return ctx;
+}
+
+extern __inline__ void spitfire_set_primary_context(unsigned long ctx)
+{
+	__asm__ __volatile__("stxa	%0, [%1] %2"
+			     : /* No outputs */
+			     : "r" (ctx & 0x1fff),
+			       "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
+	membar("#Sync");
+}
+
+extern __inline__ unsigned long spitfire_get_secondary_context(void)
+{
+	unsigned long ctx;
+
+	__asm__ __volatile__("ldxa	[%1] %2, %0"
+			     : "=r" (ctx)
+			     : "r" (SECONDARY_CONTEXT), "i" (ASI_DMMU));
+	return ctx;
+}
+
+extern __inline__ void spitfire_set_secondary_context(unsigned long ctx)
+{
+	__asm__ __volatile__("stxa	%0, [%1] %2"
+			     : /* No outputs */
+			     : "r" (ctx & 0x1fff),
+			       "r" (SECONDARY_CONTEXT), "i" (ASI_DMMU));
+	membar("#Sync");
+}
+
+/* The data cache is write through, so this just invalidates the
+ * specified line.
+ */
+extern __inline__ void spitfire_put_dcache_tag(unsigned long addr, unsigned long tag)
+{
+	__asm__ __volatile__("stxa	%0, [%1] %2"
+			     : /* No outputs */
+			     : "r" (tag), "r" (addr), "i" (ASI_DCACHE_TAG));
+}
+
+/* The instruction cache lines are flushed with this, but note that
+ * this does not flush the pipeline.  It is possible for a line to
+ * get flushed but stale instructions to still be in the pipeline,
+ * a flush instruction (to any address) is sufficient to handle
+ * this issue after the line is invalidated.
+ */
+extern __inline__ void spitfire_put_icache_tag(unsigned long addr, unsigned long tag)
+{
+	__asm__ __volatile__("stxa	%0, [%1] %2"
+			     : /* No outputs */
+			     : "r" (tag), "r" (addr), "i" (ASI_IC_TAG));
+}
+
+extern __inline__ unsigned long spitfire_get_dtlb_data(int entry)
+{
+	unsigned long data;
+
+	__asm__ __volatile__("ldxa	[%1] %2, %0"
+			     : "=r" (data)
+			     : "r" (entry << 3), "i" (ASI_DTLB_DATA_ACCESS));
+	return data;
+}
+
+extern __inline__ unsigned long spitfire_get_dtlb_tag(int entry)
+{
+	unsigned long tag;
+
+	__asm__ __volatile__("ldxa	[%1] %2, %0"
+			     : "=r" (tag)
+			     : "r" (entry << 3), "i" (ASI_DTLB_TAG_READ));
+	return tag;
+}
+
+extern __inline__ void spitfire_put_dtlb_data(int entry, unsigned long data)
+{
+	__asm__ __volatile__("stxa	%0, [%1] %2"
+			     : /* No outputs */
+			     : "r" (data), "r" (entry << 3),
+			       "i" (ASI_DTLB_DATA_ACCESS));
+}
+
+extern __inline__ unsigned long spitfire_get_itlb_data(int entry)
+{
+	unsigned long data;
+
+	__asm__ __volatile__("ldxa	[%1] %2, %0"
+			     : "=r" (data)
+			     : "r" (entry << 3), "i" (ASI_ITLB_DATA_ACCESS));
+	return data;
+}
+
+extern __inline__ unsigned long spitfire_get_itlb_tag(int entry)
+{
+	unsigned long tag;
+
+	__asm__ __volatile__("ldxa	[%1] %2, %0"
+			     : "=r" (tag)
+			     : "r" (entry << 3), "i" (ASI_ITLB_TAG_READ));
+	return tag;
+}
+
+extern __inline__ void spitfire_put_itlb_data(int entry, unsigned long data)
+{
+	__asm__ __volatile__("stxa	%0, [%1] %2"
+			     : /* No outputs */
+			     : "r" (data), "r" (entry << 3),
+			       "i" (ASI_ITLB_DATA_ACCESS));
+}
+
+/* Spitfire hardware assisted TLB flushes. */
+
+/* Context level flushes. */
+extern __inline__ void spitfire_flush_dtlb_primary_context(void)
+{
+	__asm__ __volatile__("stxa	%%g0, [%0] %1"
+			     : /* No outputs */
+			     : "r" (0x40), "i" (ASI_DMMU_DEMAP));
+}
+
+extern __inline__ void spitfire_flush_itlb_primary_context(void)
+{
+	__asm__ __volatile__("stxa	%%g0, [%0] %1"
+			     : /* No outputs */
+			     : "r" (0x40), "i" (ASI_IMMU_DEMAP));
+}
+
+extern __inline__ void spitfire_flush_dtlb_secondary_context(void)
+{
+	__asm__ __volatile__("stxa	%%g0, [%0] %1"
+			     : /* No outputs */
+			     : "r" (0x41), "i" (ASI_DMMU_DEMAP));
+}
+
+extern __inline__ void spitfire_flush_itlb_secondary_context(void)
+{
+	__asm__ __volatile__("stxa	%%g0, [%0] %1"
+			     : /* No outputs */
+			     : "r" (0x41), "i" (ASI_IMMU_DEMAP));
+}
+
+extern __inline__ void spitfire_flush_dtlb_nucleus_context(void)
+{
+	__asm__ __volatile__("stxa	%%g0, [%0] %1"
+			     : /* No outputs */
+			     : "r" (0x42), "i" (ASI_DMMU_DEMAP));
+}
+
+extern __inline__ void spitfire_flush_itlb_nucleus_context(void)
+{
+	__asm__ __volatile__("stxa	%%g0, [%0] %1"
+			     : /* No outputs */
+			     : "r" (0x42), "i" (ASI_IMMU_DEMAP));
+}
+
+/* Page level flushes. */
+extern __inline__ void spitfire_flush_dtlb_primary_page(unsigned long page)
+{
+	__asm__ __volatile__("stxa	%%g0, [%0] %1"
+			     : /* No outputs */
+			     : "r" (page), "i" (ASI_DMMU_DEMAP));
+}
+
+extern __inline__ void spitfire_flush_itlb_primary_page(unsigned long page)
+{
+	__asm__ __volatile__("stxa	%%g0, [%0] %1"
+			     : /* No outputs */
+			     : "r" (page), "i" (ASI_IMMU_DEMAP));
+}
+
+extern __inline__ void spitfire_flush_dtlb_secondary_page(unsigned long page)
+{
+	__asm__ __volatile__("stxa	%%g0, [%0] %1"
+			     : /* No outputs */
+			     : "r" (page | 0x10), "i" (ASI_DMMU_DEMAP));
+}
+
+extern __inline__ void spitfire_flush_itlb_secondary_page(unsigned long page)
+{
+	__asm__ __volatile__("stxa	%%g0, [%0] %1"
+			     : /* No outputs */
+			     : "r" (page | 0x10), "i" (ASI_IMMU_DEMAP));
+}
+
+extern __inline__ void spitfire_flush_dtlb_nucleus_page(unsigned long page)
+{
+	__asm__ __volatile__("stxa	%%g0, [%0] %1"
+			     : /* No outputs */
+			     : "r" (page | 0x20), "i" (ASI_DMMU_DEMAP));
+}
+
+extern __inline__ void spitfire_flush_itlb_nucleus_page(unsigned long page)
+{
+	__asm__ __volatile__("stxa	%%g0, [%0] %1"
+			     : /* No outputs */
+			     : "r" (page | 0x20), "i" (ASI_IMMU_DEMAP));
+}
+
+#endif /* !(__ASSEMBLY__) */
+
+#endif /* !(_SPARC64_SPITFIRE_H) */