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David Gibson4db68bf2007-06-13 14:52:54 +10001#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__
David Gibson8e561e72007-06-13 14:52:56 +100031struct ppc_bat {
David Gibson4db68bf2007-06-13 14:52:54 +100032 struct {
33 unsigned long bepi:15; /* Effective page index (virtual address) */
34 unsigned long :4; /* Unused */
35 unsigned long bl:11; /* Block size mask */
36 unsigned long vs:1; /* Supervisor valid */
37 unsigned long vp:1; /* User valid */
38 } batu; /* Upper register */
39 struct {
40 unsigned long brpn:15; /* Real page index (physical address) */
41 unsigned long :10; /* Unused */
42 unsigned long w:1; /* Write-thru cache */
43 unsigned long i:1; /* Cache inhibit */
44 unsigned long m:1; /* Memory coherence */
45 unsigned long g:1; /* Guarded (MBZ in IBAT) */
46 unsigned long :1; /* Unused */
47 unsigned long pp:2; /* Page access protections */
48 } batl; /* Lower register */
David Gibson8e561e72007-06-13 14:52:56 +100049};
David Gibson4db68bf2007-06-13 14:52:54 +100050#endif /* !__ASSEMBLY__ */
51
52/*
53 * Hash table
54 */
55
56/* Values for PP (assumes Ks=0, Kp=1) */
57#define PP_RWXX 0 /* Supervisor read/write, User none */
58#define PP_RWRX 1 /* Supervisor read/write, User read */
59#define PP_RWRW 2 /* Supervisor read/write, User read/write */
60#define PP_RXRX 3 /* Supervisor read, User read */
61
62#ifndef __ASSEMBLY__
63
64/* Hardware Page Table Entry */
David Gibson8e561e72007-06-13 14:52:56 +100065struct hash_pte {
David Gibson4db68bf2007-06-13 14:52:54 +100066 unsigned long v:1; /* Entry is valid */
67 unsigned long vsid:24; /* Virtual segment identifier */
68 unsigned long h:1; /* Hash algorithm indicator */
69 unsigned long api:6; /* Abbreviated page index */
70 unsigned long rpn:20; /* Real (physical) page number */
71 unsigned long :3; /* Unused */
72 unsigned long r:1; /* Referenced */
73 unsigned long c:1; /* Changed */
74 unsigned long w:1; /* Write-thru cache mode */
75 unsigned long i:1; /* Cache inhibited */
76 unsigned long m:1; /* Memory coherence */
77 unsigned long g:1; /* Guarded */
78 unsigned long :1; /* Unused */
79 unsigned long pp:2; /* Page protection */
David Gibson8e561e72007-06-13 14:52:56 +100080};
David Gibson4db68bf2007-06-13 14:52:54 +100081
82typedef struct {
83 unsigned long id;
84 unsigned long vdso_base;
85} mm_context_t;
86
David Gibson4db68bf2007-06-13 14:52:54 +100087#endif /* !__ASSEMBLY__ */
88
89#endif /* _ASM_POWERPC_MMU_HASH32_H_ */