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!
diff --git a/include/asm-sparc/pgtsun4.h b/include/asm-sparc/pgtsun4.h
new file mode 100644
index 0000000..60bda10
--- /dev/null
+++ b/include/asm-sparc/pgtsun4.h
@@ -0,0 +1,171 @@
+/* $Id: pgtsun4.h,v 1.5 2000/06/05 06:08:46 anton Exp $
+ * pgtsun4.h: Sun4 specific pgtable.h defines and code.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ */
+#ifndef _SPARC_PGTSUN4C_H
+#define _SPARC_PGTSUN4C_H
+
+#include <asm/contregs.h>
+
+/* PMD_SHIFT determines the size of the area a second-level page table can map */
+#define SUN4C_PMD_SHIFT 23
+
+/* PGDIR_SHIFT determines what a third-level page table entry can map */
+#define SUN4C_PGDIR_SHIFT 23
+#define SUN4C_PGDIR_SIZE (1UL << SUN4C_PGDIR_SHIFT)
+#define SUN4C_PGDIR_MASK (~(SUN4C_PGDIR_SIZE-1))
+#define SUN4C_PGDIR_ALIGN(addr) (((addr)+SUN4C_PGDIR_SIZE-1)&SUN4C_PGDIR_MASK)
+
+/* To represent how the sun4c mmu really lays things out. */
+#define SUN4C_REAL_PGDIR_SHIFT 18
+#define SUN4C_REAL_PGDIR_SIZE (1UL << SUN4C_REAL_PGDIR_SHIFT)
+#define SUN4C_REAL_PGDIR_MASK (~(SUN4C_REAL_PGDIR_SIZE-1))
+#define SUN4C_REAL_PGDIR_ALIGN(addr) (((addr)+SUN4C_REAL_PGDIR_SIZE-1)&SUN4C_REAL_PGDIR_MASK)
+
+/* 19 bit PFN on sun4 */
+#define SUN4C_PFN_MASK 0x7ffff
+
+/* Don't increase these unless the structures in sun4c.c are fixed */
+#define SUN4C_MAX_SEGMAPS 256
+#define SUN4C_MAX_CONTEXTS 16
+
+/*
+ * To be efficient, and not have to worry about allocating such
+ * a huge pgd, we make the kernel sun4c tables each hold 1024
+ * entries and the pgd similarly just like the i386 tables.
+ */
+#define SUN4C_PTRS_PER_PTE 1024
+#define SUN4C_PTRS_PER_PMD 1
+#define SUN4C_PTRS_PER_PGD 1024
+
+/*
+ * Sparc SUN4C pte fields.
+ */
+#define _SUN4C_PAGE_VALID 0x80000000
+#define _SUN4C_PAGE_SILENT_READ 0x80000000 /* synonym */
+#define _SUN4C_PAGE_DIRTY 0x40000000
+#define _SUN4C_PAGE_SILENT_WRITE 0x40000000 /* synonym */
+#define _SUN4C_PAGE_PRIV 0x20000000 /* privileged page */
+#define _SUN4C_PAGE_NOCACHE 0x10000000 /* non-cacheable page */
+#define _SUN4C_PAGE_PRESENT 0x08000000 /* implemented in software */
+#define _SUN4C_PAGE_IO 0x04000000 /* I/O page */
+#define _SUN4C_PAGE_FILE 0x02000000 /* implemented in software */
+#define _SUN4C_PAGE_READ 0x00800000 /* implemented in software */
+#define _SUN4C_PAGE_WRITE 0x00400000 /* implemented in software */
+#define _SUN4C_PAGE_ACCESSED 0x00200000 /* implemented in software */
+#define _SUN4C_PAGE_MODIFIED 0x00100000 /* implemented in software */
+
+#define _SUN4C_READABLE (_SUN4C_PAGE_READ|_SUN4C_PAGE_SILENT_READ|\
+ _SUN4C_PAGE_ACCESSED)
+#define _SUN4C_WRITEABLE (_SUN4C_PAGE_WRITE|_SUN4C_PAGE_SILENT_WRITE|\
+ _SUN4C_PAGE_MODIFIED)
+
+#define _SUN4C_PAGE_CHG_MASK (0xffff|_SUN4C_PAGE_ACCESSED|_SUN4C_PAGE_MODIFIED)
+
+#define SUN4C_PAGE_NONE __pgprot(_SUN4C_PAGE_PRESENT)
+#define SUN4C_PAGE_SHARED __pgprot(_SUN4C_PAGE_PRESENT|_SUN4C_READABLE|\
+ _SUN4C_PAGE_WRITE)
+#define SUN4C_PAGE_COPY __pgprot(_SUN4C_PAGE_PRESENT|_SUN4C_READABLE)
+#define SUN4C_PAGE_READONLY __pgprot(_SUN4C_PAGE_PRESENT|_SUN4C_READABLE)
+#define SUN4C_PAGE_KERNEL __pgprot(_SUN4C_READABLE|_SUN4C_WRITEABLE|\
+ _SUN4C_PAGE_DIRTY|_SUN4C_PAGE_PRIV)
+
+/* SUN4C swap entry encoding
+ *
+ * We use 5 bits for the type and 19 for the offset. This gives us
+ * 32 swapfiles of 4GB each. Encoding looks like:
+ *
+ * RRRRRRRRooooooooooooooooooottttt
+ * fedcba9876543210fedcba9876543210
+ *
+ * The top 8 bits are reserved for protection and status bits, especially
+ * FILE and PRESENT.
+ */
+#define SUN4C_SWP_TYPE_MASK 0x1f
+#define SUN4C_SWP_OFF_MASK 0x7ffff
+#define SUN4C_SWP_OFF_SHIFT 5
+
+#ifndef __ASSEMBLY__
+
+static inline unsigned long sun4c_get_synchronous_error(void)
+{
+ unsigned long sync_err;
+
+ __asm__ __volatile__("lda [%1] %2, %0\n\t" :
+ "=r" (sync_err) :
+ "r" (AC_SYNC_ERR), "i" (ASI_CONTROL));
+ return sync_err;
+}
+
+static inline unsigned long sun4c_get_synchronous_address(void)
+{
+ unsigned long sync_addr;
+
+ __asm__ __volatile__("lda [%1] %2, %0\n\t" :
+ "=r" (sync_addr) :
+ "r" (AC_SYNC_VA), "i" (ASI_CONTROL));
+ return sync_addr;
+}
+
+/* SUN4 pte, segmap, and context manipulation */
+static inline unsigned long sun4c_get_segmap(unsigned long addr)
+{
+ register unsigned long entry;
+
+ __asm__ __volatile__("\n\tlduha [%1] %2, %0\n\t" :
+ "=r" (entry) :
+ "r" (addr), "i" (ASI_SEGMAP));
+ return entry;
+}
+
+static inline void sun4c_put_segmap(unsigned long addr, unsigned long entry)
+{
+ __asm__ __volatile__("\n\tstha %1, [%0] %2; nop; nop; nop;\n\t" : :
+ "r" (addr), "r" (entry),
+ "i" (ASI_SEGMAP)
+ : "memory");
+}
+
+static inline unsigned long sun4c_get_pte(unsigned long addr)
+{
+ register unsigned long entry;
+
+ __asm__ __volatile__("\n\tlda [%1] %2, %0\n\t" :
+ "=r" (entry) :
+ "r" (addr), "i" (ASI_PTE));
+ return entry;
+}
+
+static inline void sun4c_put_pte(unsigned long addr, unsigned long entry)
+{
+ __asm__ __volatile__("\n\tsta %1, [%0] %2; nop; nop; nop;\n\t" : :
+ "r" (addr),
+ "r" ((entry & ~(_SUN4C_PAGE_PRESENT))), "i" (ASI_PTE)
+ : "memory");
+}
+
+static inline int sun4c_get_context(void)
+{
+ register int ctx;
+
+ __asm__ __volatile__("\n\tlduba [%1] %2, %0\n\t" :
+ "=r" (ctx) :
+ "r" (AC_CONTEXT), "i" (ASI_CONTROL));
+
+ return ctx;
+}
+
+static inline int sun4c_set_context(int ctx)
+{
+ __asm__ __volatile__("\n\tstba %0, [%1] %2; nop; nop; nop;\n\t" : :
+ "r" (ctx), "r" (AC_CONTEXT), "i" (ASI_CONTROL)
+ : "memory");
+
+ return ctx;
+}
+
+#endif /* !(__ASSEMBLY__) */
+
+#endif /* !(_SPARC_PGTSUN4_H) */