e3e1d15855
Previously, the 36-bit code was using these bits, but they had never been named in the pte format definition. This patch just gives those fields their proper names and adds a comment that they are only present on some processors. There is no functional code change. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
#ifndef _ASM_POWERPC_MMU_HASH32_H_
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#define _ASM_POWERPC_MMU_HASH32_H_
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/*
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* 32-bit hash table MMU support
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*/
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/*
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* BATs
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*/
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/* Block size masks */
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#define BL_128K 0x000
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#define BL_256K 0x001
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#define BL_512K 0x003
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#define BL_1M 0x007
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#define BL_2M 0x00F
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#define BL_4M 0x01F
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#define BL_8M 0x03F
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#define BL_16M 0x07F
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#define BL_32M 0x0FF
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#define BL_64M 0x1FF
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#define BL_128M 0x3FF
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#define BL_256M 0x7FF
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/* BAT Access Protection */
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#define BPP_XX 0x00 /* No access */
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#define BPP_RX 0x01 /* Read only */
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#define BPP_RW 0x02 /* Read/write */
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#ifndef __ASSEMBLY__
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/* Contort a phys_addr_t into the right format/bits for a BAT */
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#ifdef CONFIG_PHYS_64BIT
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#define BAT_PHYS_ADDR(x) ((u32)((x & 0x00000000fffe0000ULL) | \
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((x & 0x0000000e00000000ULL) >> 24) | \
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((x & 0x0000000100000000ULL) >> 30)))
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#else
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#define BAT_PHYS_ADDR(x) (x)
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#endif
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struct ppc_bat {
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u32 batu;
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u32 batl;
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};
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#endif /* !__ASSEMBLY__ */
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/*
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* Hash table
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*/
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/* Values for PP (assumes Ks=0, Kp=1) */
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#define PP_RWXX 0 /* Supervisor read/write, User none */
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#define PP_RWRX 1 /* Supervisor read/write, User read */
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#define PP_RWRW 2 /* Supervisor read/write, User read/write */
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#define PP_RXRX 3 /* Supervisor read, User read */
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#ifndef __ASSEMBLY__
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/*
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* Hardware Page Table Entry
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* Note that the xpn and x bitfields are used only by processors that
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* support extended addressing; otherwise, those bits are reserved.
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*/
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struct hash_pte {
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unsigned long v:1; /* Entry is valid */
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unsigned long vsid:24; /* Virtual segment identifier */
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unsigned long h:1; /* Hash algorithm indicator */
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unsigned long api:6; /* Abbreviated page index */
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unsigned long rpn:20; /* Real (physical) page number */
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unsigned long xpn:3; /* Real page number bits 0-2, optional */
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unsigned long r:1; /* Referenced */
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unsigned long c:1; /* Changed */
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unsigned long w:1; /* Write-thru cache mode */
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unsigned long i:1; /* Cache inhibited */
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unsigned long m:1; /* Memory coherence */
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unsigned long g:1; /* Guarded */
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unsigned long x:1; /* Real page number bit 3, optional */
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unsigned long pp:2; /* Page protection */
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};
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typedef struct {
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unsigned long id;
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unsigned long vdso_base;
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} mm_context_t;
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#endif /* !__ASSEMBLY__ */
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/* We happily ignore the smaller BATs on 601, we don't actually use
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* those definitions on hash32 at the moment anyway
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*/
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#define mmu_virtual_psize MMU_PAGE_4K
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#define mmu_linear_psize MMU_PAGE_256M
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#endif /* _ASM_POWERPC_MMU_HASH32_H_ */
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