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Diffstat (limited to 'arch/powerpc/include/asm/mmu-hash32.h')
-rw-r--r--arch/powerpc/include/asm/mmu-hash32.h16
1 files changed, 13 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/mmu-hash32.h b/arch/powerpc/include/asm/mmu-hash32.h
index 16b1a1e77e64..16f513e5cbd7 100644
--- a/arch/powerpc/include/asm/mmu-hash32.h
+++ b/arch/powerpc/include/asm/mmu-hash32.h
@@ -55,21 +55,25 @@ struct ppc_bat {
#ifndef __ASSEMBLY__
-/* Hardware Page Table Entry */
+/*
+ * Hardware Page Table Entry
+ * Note that the xpn and x bitfields are used only by processors that
+ * support extended addressing; otherwise, those bits are reserved.
+ */
struct hash_pte {
unsigned long v:1; /* Entry is valid */
unsigned long vsid:24; /* Virtual segment identifier */
unsigned long h:1; /* Hash algorithm indicator */
unsigned long api:6; /* Abbreviated page index */
unsigned long rpn:20; /* Real (physical) page number */
- unsigned long :3; /* Unused */
+ unsigned long xpn:3; /* Real page number bits 0-2, optional */
unsigned long r:1; /* Referenced */
unsigned long c:1; /* Changed */
unsigned long w:1; /* Write-thru cache mode */
unsigned long i:1; /* Cache inhibited */
unsigned long m:1; /* Memory coherence */
unsigned long g:1; /* Guarded */
- unsigned long :1; /* Unused */
+ unsigned long x:1; /* Real page number bit 3, optional */
unsigned long pp:2; /* Page protection */
};
@@ -80,4 +84,10 @@ typedef struct {
#endif /* !__ASSEMBLY__ */
+/* We happily ignore the smaller BATs on 601, we don't actually use
+ * those definitions on hash32 at the moment anyway
+ */
+#define mmu_virtual_psize MMU_PAGE_4K
+#define mmu_linear_psize MMU_PAGE_256M
+
#endif /* _ASM_POWERPC_MMU_HASH32_H_ */