X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-sparc%2Fpgtsun4.h;h=60bda107f2067877138433b74c84d9eabed541be;hb=6c6294c4656749c1eeed12df7ae48e2bf5a394b3;hp=ecd5afcf229d2c76e074faf6e866470d397d5a21;hpb=9213980e6a70d8473e0ffd4b39ab5b6caaba9ff5;p=linux-2.6.git

diff --git a/include/asm-sparc/pgtsun4.h b/include/asm-sparc/pgtsun4.h
index ecd5afcf2..60bda107f 100644
--- 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)