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Linux kernel mirror (for testing)
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1#ifndef _ASM_POWERPC_MMU_HASH32_H_
2#define _ASM_POWERPC_MMU_HASH32_H_
3/*
4 * 32-bit hash table MMU support
5 */
6
7/*
8 * BATs
9 */
10
11/* Block size masks */
12#define BL_128K 0x000
13#define BL_256K 0x001
14#define BL_512K 0x003
15#define BL_1M 0x007
16#define BL_2M 0x00F
17#define BL_4M 0x01F
18#define BL_8M 0x03F
19#define BL_16M 0x07F
20#define BL_32M 0x0FF
21#define BL_64M 0x1FF
22#define BL_128M 0x3FF
23#define BL_256M 0x7FF
24
25/* BAT Access Protection */
26#define BPP_XX 0x00 /* No access */
27#define BPP_RX 0x01 /* Read only */
28#define BPP_RW 0x02 /* Read/write */
29
30#ifndef __ASSEMBLY__
31/* Contort a phys_addr_t into the right format/bits for a BAT */
32#ifdef CONFIG_PHYS_64BIT
33#define BAT_PHYS_ADDR(x) ((u32)((x & 0x00000000fffe0000ULL) | \
34 ((x & 0x0000000e00000000ULL) >> 24) | \
35 ((x & 0x0000000100000000ULL) >> 30)))
36#else
37#define BAT_PHYS_ADDR(x) (x)
38#endif
39
40struct ppc_bat {
41 u32 batu;
42 u32 batl;
43};
44#endif /* !__ASSEMBLY__ */
45
46/*
47 * Hash table
48 */
49
50/* Values for PP (assumes Ks=0, Kp=1) */
51#define PP_RWXX 0 /* Supervisor read/write, User none */
52#define PP_RWRX 1 /* Supervisor read/write, User read */
53#define PP_RWRW 2 /* Supervisor read/write, User read/write */
54#define PP_RXRX 3 /* Supervisor read, User read */
55
56#ifndef __ASSEMBLY__
57
58/* Hardware Page Table Entry */
59struct hash_pte {
60 unsigned long v:1; /* Entry is valid */
61 unsigned long vsid:24; /* Virtual segment identifier */
62 unsigned long h:1; /* Hash algorithm indicator */
63 unsigned long api:6; /* Abbreviated page index */
64 unsigned long rpn:20; /* Real (physical) page number */
65 unsigned long :3; /* Unused */
66 unsigned long r:1; /* Referenced */
67 unsigned long c:1; /* Changed */
68 unsigned long w:1; /* Write-thru cache mode */
69 unsigned long i:1; /* Cache inhibited */
70 unsigned long m:1; /* Memory coherence */
71 unsigned long g:1; /* Guarded */
72 unsigned long :1; /* Unused */
73 unsigned long pp:2; /* Page protection */
74};
75
76typedef struct {
77 unsigned long id;
78 unsigned long vdso_base;
79} mm_context_t;
80
81#endif /* !__ASSEMBLY__ */
82
83#endif /* _ASM_POWERPC_MMU_HASH32_H_ */