| David Gibson | 4db68bf | 2007-06-13 14:52:54 +1000 | [diff] [blame] | 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__ |
| David Gibson | 8e561e7 | 2007-06-13 14:52:56 +1000 | [diff] [blame] | 31 | struct ppc_bat { |
| David Gibson | 4db68bf | 2007-06-13 14:52:54 +1000 | [diff] [blame] | 32 | 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 Gibson | 8e561e7 | 2007-06-13 14:52:56 +1000 | [diff] [blame] | 49 | }; |
| David Gibson | 4db68bf | 2007-06-13 14:52:54 +1000 | [diff] [blame] | 50 | #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 Gibson | 8e561e7 | 2007-06-13 14:52:56 +1000 | [diff] [blame] | 65 | struct hash_pte { |
| David Gibson | 4db68bf | 2007-06-13 14:52:54 +1000 | [diff] [blame] | 66 | 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 Gibson | 8e561e7 | 2007-06-13 14:52:56 +1000 | [diff] [blame] | 80 | }; |
| David Gibson | 4db68bf | 2007-06-13 14:52:54 +1000 | [diff] [blame] | 81 | |
| 82 | typedef struct { |
| 83 | unsigned long id; |
| 84 | unsigned long vdso_base; |
| 85 | } mm_context_t; |
| 86 | |
| David Gibson | 4db68bf | 2007-06-13 14:52:54 +1000 | [diff] [blame] | 87 | #endif /* !__ASSEMBLY__ */ |
| 88 | |
| 89 | #endif /* _ASM_POWERPC_MMU_HASH32_H_ */ |