VServer 1.9.2 (patch-2.6.8.1-vs1.9.2.diff)

[linux-2.6.git] / include / asm-sparc / pgtsun4.h

diff --git a/include/asm-sparc/pgtsun4.h b/include/asm-sparc/pgtsun4.h
index ecd5afc..60bda10 100644 (file)
--- a/include/asm-sparc/pgtsun4.h
+++ b/include/asm-sparc/pgtsun4.h
@@ -51,6 +51,7 @@
 #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 */
@@ -71,6 +72,21 @@
 #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)