powerpc: Add memory management headers for new 64-bit BookE
This adds the PTE and pgtable format definitions, along with changes
to the kernel memory map and other definitions related to implementing
support for 64-bit Book3E. This also shields some asm-offset bits that
are currently only relevant on 32-bit
We also move the definition of the "linux" page size constants to
the common mmu.h file and add a few sizes that are relevant to
embedded processors.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index fb57ded..2fcfefc 100644
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -17,6 +17,7 @@
#define MMU_FTR_TYPE_40x ASM_CONST(0x00000004)
#define MMU_FTR_TYPE_44x ASM_CONST(0x00000008)
#define MMU_FTR_TYPE_FSL_E ASM_CONST(0x00000010)
+#define MMU_FTR_TYPE_3E ASM_CONST(0x00000020)
/*
* This is individual features
@@ -73,6 +74,41 @@
#endif /* !__ASSEMBLY__ */
+/* The kernel use the constants below to index in the page sizes array.
+ * The use of fixed constants for this purpose is better for performances
+ * of the low level hash refill handlers.
+ *
+ * A non supported page size has a "shift" field set to 0
+ *
+ * Any new page size being implemented can get a new entry in here. Whether
+ * the kernel will use it or not is a different matter though. The actual page
+ * size used by hugetlbfs is not defined here and may be made variable
+ *
+ * Note: This array ended up being a false good idea as it's growing to the
+ * point where I wonder if we should replace it with something different,
+ * to think about, feedback welcome. --BenH.
+ */
+
+/* There are #define as they have to be used in assembly
+ *
+ * WARNING: If you change this list, make sure to update the array of
+ * names currently in arch/powerpc/mm/hugetlbpage.c or bad things will
+ * happen
+ */
+#define MMU_PAGE_4K 0
+#define MMU_PAGE_16K 1
+#define MMU_PAGE_64K 2
+#define MMU_PAGE_64K_AP 3 /* "Admixed pages" (hash64 only) */
+#define MMU_PAGE_256K 4
+#define MMU_PAGE_1M 5
+#define MMU_PAGE_8M 6
+#define MMU_PAGE_16M 7
+#define MMU_PAGE_256M 8
+#define MMU_PAGE_1G 9
+#define MMU_PAGE_16G 10
+#define MMU_PAGE_64G 11
+#define MMU_PAGE_COUNT 12
+
#if defined(CONFIG_PPC_STD_MMU_64)
/* 64-bit classic hash table MMU */
@@ -94,5 +130,6 @@
# include <asm/mmu-8xx.h>
#endif
+
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_MMU_H_ */