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powerpc: Add memory management headers for new 64-bit BookE

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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>
This commit is contained in:
Benjamin Herrenschmidt
2009-07-28 11:59:34 +10:00
parent 0257c99cdf
commit 57e2a99f74
10 changed files with 205 additions and 40 deletions
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37
arch/powerpc/include/asm/mmu.h
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@@ -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 @@ extern void early_init_mmu_secondary(void);
#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 @@ extern void early_init_mmu_secondary(void);
# include <asm/mmu-8xx.h>
#endif
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_MMU_H_ */