Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 461 insertions, 0 deletions

diff --git a/include/asm-sparc64/spitfire.h b/include/asm-sparc64/spitfire.h
new file mode 100644
index 00000000000..ad78ce64d69
--- /dev/null
+++ b/include/asm-sparc64/spitfire.h
@@ -0,0 +1,461 @@
+/* $Id: spitfire.h,v 1.18 2001/11/29 16:42:10 kanoj 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 /* All chips                         */
+#define TLB_SFSR                0x0000000000000018 /* All chips                         */
+#define TSB_REG                 0x0000000000000028 /* All chips                         */
+#define TLB_TAG_ACCESS          0x0000000000000030 /* All chips                         */
+#define VIRT_WATCHPOINT         0x0000000000000038 /* All chips                         */
+#define PHYS_WATCHPOINT         0x0000000000000040 /* All chips                         */
+#define TSB_EXTENSION_P         0x0000000000000048 /* Ultra-III and later               */
+#define TSB_EXTENSION_S         0x0000000000000050 /* Ultra-III and later, D-TLB only   */
+#define TSB_EXTENSION_N         0x0000000000000058 /* Ultra-III and later               */
+#define TLB_TAG_ACCESS_EXT      0x0000000000000060 /* Ultra-III+ and later              */
+
+/* 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
+
+#define SPITFIRE_HIGHEST_LOCKED_TLBENT  (64 - 1)
+#define CHEETAH_HIGHEST_LOCKED_TLBENT   (16 - 1)
+
+#define L1DCACHE_SIZE           0x4000
+
+#ifndef __ASSEMBLY__
+
+enum ultra_tlb_layout {
+        spitfire = 0,
+        cheetah = 1,
+        cheetah_plus = 2,
+};
+
+extern enum ultra_tlb_layout tlb_type;
+
+#define sparc64_highest_locked_tlbent() \
+        (tlb_type == spitfire ? \
+         SPITFIRE_HIGHEST_LOCKED_TLBENT : \
+         CHEETAH_HIGHEST_LOCKED_TLBENT)
+
+static __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;
+}
+
+static __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;
+}
+
+static __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;
+}
+
+static __inline__ void spitfire_put_isfsr(unsigned long sfsr)
+{
+        __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
+                             "membar    #Sync"
+                             : /* no outputs */
+                             : "r" (sfsr), "r" (TLB_SFSR), "i" (ASI_IMMU));
+}
+
+static __inline__ void spitfire_put_dsfsr(unsigned long sfsr)
+{
+        __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
+                             "membar    #Sync"
+                             : /* no outputs */
+                             : "r" (sfsr), "r" (TLB_SFSR), "i" (ASI_DMMU));
+}
+
+/* The data cache is write through, so this just invalidates the
+ * specified line.
+ */
+static __inline__ void spitfire_put_dcache_tag(unsigned long addr, unsigned long tag)
+{
+        __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (tag), "r" (addr), "i" (ASI_DCACHE_TAG));
+        __asm__ __volatile__ ("membar #Sync" : : : "memory");
+}
+
+/* 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.
+ */
+static __inline__ void spitfire_put_icache_tag(unsigned long addr, unsigned long tag)
+{
+        __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (tag), "r" (addr), "i" (ASI_IC_TAG));
+}
+
+static __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));
+
+        /* Clear TTE diag bits. */
+        data &= ~0x0003fe0000000000UL;
+
+        return data;
+}
+
+static __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;
+}
+
+static __inline__ void spitfire_put_dtlb_data(int entry, unsigned long data)
+{
+        __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (data), "r" (entry << 3),
+                               "i" (ASI_DTLB_DATA_ACCESS));
+}
+
+static __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));
+
+        /* Clear TTE diag bits. */
+        data &= ~0x0003fe0000000000UL;
+
+        return data;
+}
+
+static __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;
+}
+
+static __inline__ void spitfire_put_itlb_data(int entry, unsigned long data)
+{
+        __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (data), "r" (entry << 3),
+                               "i" (ASI_ITLB_DATA_ACCESS));
+}
+
+/* Spitfire hardware assisted TLB flushes. */
+
+/* Context level flushes. */
+static __inline__ void spitfire_flush_dtlb_primary_context(void)
+{
+        __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (0x40), "i" (ASI_DMMU_DEMAP));
+}
+
+static __inline__ void spitfire_flush_itlb_primary_context(void)
+{
+        __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (0x40), "i" (ASI_IMMU_DEMAP));
+}
+
+static __inline__ void spitfire_flush_dtlb_secondary_context(void)
+{
+        __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (0x50), "i" (ASI_DMMU_DEMAP));
+}
+
+static __inline__ void spitfire_flush_itlb_secondary_context(void)
+{
+        __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (0x50), "i" (ASI_IMMU_DEMAP));
+}
+
+static __inline__ void spitfire_flush_dtlb_nucleus_context(void)
+{
+        __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (0x60), "i" (ASI_DMMU_DEMAP));
+}
+
+static __inline__ void spitfire_flush_itlb_nucleus_context(void)
+{
+        __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (0x60), "i" (ASI_IMMU_DEMAP));
+}
+
+/* Page level flushes. */
+static __inline__ void spitfire_flush_dtlb_primary_page(unsigned long page)
+{
+        __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (page), "i" (ASI_DMMU_DEMAP));
+}
+
+static __inline__ void spitfire_flush_itlb_primary_page(unsigned long page)
+{
+        __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (page), "i" (ASI_IMMU_DEMAP));
+}
+
+static __inline__ void spitfire_flush_dtlb_secondary_page(unsigned long page)
+{
+        __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (page | 0x10), "i" (ASI_DMMU_DEMAP));
+}
+
+static __inline__ void spitfire_flush_itlb_secondary_page(unsigned long page)
+{
+        __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (page | 0x10), "i" (ASI_IMMU_DEMAP));
+}
+
+static __inline__ void spitfire_flush_dtlb_nucleus_page(unsigned long page)
+{
+        __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (page | 0x20), "i" (ASI_DMMU_DEMAP));
+}
+
+static __inline__ void spitfire_flush_itlb_nucleus_page(unsigned long page)
+{
+        __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (page | 0x20), "i" (ASI_IMMU_DEMAP));
+}
+
+/* Cheetah has "all non-locked" tlb flushes. */
+static __inline__ void cheetah_flush_dtlb_all(void)
+{
+        __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (0x80), "i" (ASI_DMMU_DEMAP));
+}
+
+static __inline__ void cheetah_flush_itlb_all(void)
+{
+        __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (0x80), "i" (ASI_IMMU_DEMAP));
+}
+
+/* Cheetah has a 4-tlb layout so direct access is a bit different.
+ * The first two TLBs are fully assosciative, hold 16 entries, and are
+ * used only for locked and >8K sized translations.  One exists for
+ * data accesses and one for instruction accesses.
+ *
+ * The third TLB is for data accesses to 8K non-locked translations, is
+ * 2 way assosciative, and holds 512 entries.  The fourth TLB is for
+ * instruction accesses to 8K non-locked translations, is 2 way
+ * assosciative, and holds 128 entries.
+ *
+ * Cheetah has some bug where bogus data can be returned from
+ * ASI_{D,I}TLB_DATA_ACCESS loads, doing the load twice fixes
+ * the problem for me. -DaveM
+ */
+static __inline__ unsigned long cheetah_get_ldtlb_data(int entry)
+{
+        unsigned long data;
+
+        __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
+                             "ldxa      [%1] %2, %0"
+                             : "=r" (data)
+                             : "r" ((0 << 16) | (entry << 3)),
+                             "i" (ASI_DTLB_DATA_ACCESS));
+
+        return data;
+}
+
+static __inline__ unsigned long cheetah_get_litlb_data(int entry)
+{
+        unsigned long data;
+
+        __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
+                             "ldxa      [%1] %2, %0"
+                             : "=r" (data)
+                             : "r" ((0 << 16) | (entry << 3)),
+                             "i" (ASI_ITLB_DATA_ACCESS));
+
+        return data;
+}
+
+static __inline__ unsigned long cheetah_get_ldtlb_tag(int entry)
+{
+        unsigned long tag;
+
+        __asm__ __volatile__("ldxa      [%1] %2, %0"
+                             : "=r" (tag)
+                             : "r" ((0 << 16) | (entry << 3)),
+                             "i" (ASI_DTLB_TAG_READ));
+
+        return tag;
+}
+
+static __inline__ unsigned long cheetah_get_litlb_tag(int entry)
+{
+        unsigned long tag;
+
+        __asm__ __volatile__("ldxa      [%1] %2, %0"
+                             : "=r" (tag)
+                             : "r" ((0 << 16) | (entry << 3)),
+                             "i" (ASI_ITLB_TAG_READ));
+
+        return tag;
+}
+
+static __inline__ void cheetah_put_ldtlb_data(int entry, unsigned long data)
+{
+        __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (data),
+                               "r" ((0 << 16) | (entry << 3)),
+                               "i" (ASI_DTLB_DATA_ACCESS));
+}
+
+static __inline__ void cheetah_put_litlb_data(int entry, unsigned long data)
+{
+        __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (data),
+                               "r" ((0 << 16) | (entry << 3)),
+                               "i" (ASI_ITLB_DATA_ACCESS));
+}
+
+static __inline__ unsigned long cheetah_get_dtlb_data(int entry, int tlb)
+{
+        unsigned long data;
+
+        __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
+                             "ldxa      [%1] %2, %0"
+                             : "=r" (data)
+                             : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_DATA_ACCESS));
+
+        return data;
+}
+
+static __inline__ unsigned long cheetah_get_dtlb_tag(int entry, int tlb)
+{
+        unsigned long tag;
+
+        __asm__ __volatile__("ldxa      [%1] %2, %0"
+                             : "=r" (tag)
+                             : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_TAG_READ));
+        return tag;
+}
+
+static __inline__ void cheetah_put_dtlb_data(int entry, unsigned long data, int tlb)
+{
+        __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (data),
+                               "r" ((tlb << 16) | (entry << 3)),
+                               "i" (ASI_DTLB_DATA_ACCESS));
+}
+
+static __inline__ unsigned long cheetah_get_itlb_data(int entry)
+{
+        unsigned long data;
+
+        __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
+                             "ldxa      [%1] %2, %0"
+                             : "=r" (data)
+                             : "r" ((2 << 16) | (entry << 3)),
+                               "i" (ASI_ITLB_DATA_ACCESS));
+
+        return data;
+}
+
+static __inline__ unsigned long cheetah_get_itlb_tag(int entry)
+{
+        unsigned long tag;
+
+        __asm__ __volatile__("ldxa      [%1] %2, %0"
+                             : "=r" (tag)
+                             : "r" ((2 << 16) | (entry << 3)), "i" (ASI_ITLB_TAG_READ));
+        return tag;
+}
+
+static __inline__ void cheetah_put_itlb_data(int entry, unsigned long data)
+{
+        __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
+                             "membar    #Sync"
+                             : /* No outputs */
+                             : "r" (data), "r" ((2 << 16) | (entry << 3)),
+                               "i" (ASI_ITLB_DATA_ACCESS));
+}
+
+#endif /* !(__ASSEMBLY__) */
+
+#endif /* !(_SPARC64_SPITFIRE_H) */