1 files changed, 83 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/mmu-hash32.h b/arch/powerpc/include/asm/mmu-hash32.h
new file mode 100644
index 000000000000..16b1a1e77e64
--- /dev/null
+++ b/arch/powerpc/include/asm/mmu-hash32.h
@@ -0,0 +1,83 @@
+#ifndef _ASM_POWERPC_MMU_HASH32_H_
+#define _ASM_POWERPC_MMU_HASH32_H_
+/*
+ * 32-bit hash table MMU support
+ */
+
+/*
+ * BATs
+ */
+
+/* Block size masks */
+#define BL_128K 0x000
+#define BL_256K 0x001
+#define BL_512K 0x003
+#define BL_1M   0x007
+#define BL_2M   0x00F
+#define BL_4M   0x01F
+#define BL_8M   0x03F
+#define BL_16M  0x07F
+#define BL_32M  0x0FF
+#define BL_64M  0x1FF
+#define BL_128M 0x3FF
+#define BL_256M 0x7FF
+
+/* BAT Access Protection */
+#define BPP_XX  0x00            /* No access */
+#define BPP_RX  0x01            /* Read only */
+#define BPP_RW  0x02            /* Read/write */
+
+#ifndef __ASSEMBLY__
+/* Contort a phys_addr_t into the right format/bits for a BAT */
+#ifdef CONFIG_PHYS_64BIT
+#define BAT_PHYS_ADDR(x) ((u32)((x & 0x00000000fffe0000ULL) | \
+                                ((x & 0x0000000e00000000ULL) >> 24) | \
+                                ((x & 0x0000000100000000ULL) >> 30)))
+#else
+#define BAT_PHYS_ADDR(x) (x)
+#endif
+
+struct ppc_bat {
+        u32 batu;
+        u32 batl;
+};
+#endif /* !__ASSEMBLY__ */
+
+/*
+ * Hash table
+ */
+
+/* Values for PP (assumes Ks=0, Kp=1) */
+#define PP_RWXX 0       /* Supervisor read/write, User none */
+#define PP_RWRX 1       /* Supervisor read/write, User read */
+#define PP_RWRW 2       /* Supervisor read/write, User read/write */
+#define PP_RXRX 3       /* Supervisor read,       User read */
+
+#ifndef __ASSEMBLY__
+
+/* Hardware Page Table Entry */
+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 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 pp:2;     /* Page protection */
+};
+
+typedef struct {
+        unsigned long id;
+        unsigned long vdso_base;
+} mm_context_t;
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* _ASM_POWERPC_MMU_HASH32_H_ */