Paul Mackerras | 047ea78 | 2005-11-19 20:17:32 +1100 | [diff] [blame] | 1 | #ifndef _ASM_POWERPC_MMU_H_ |
| 2 | #define _ASM_POWERPC_MMU_H_ |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 3 | #ifdef __KERNEL__ |
Paul Mackerras | 047ea78 | 2005-11-19 20:17:32 +1100 | [diff] [blame] | 4 | |
Benjamin Herrenschmidt | 7c03d65 | 2008-12-18 19:13:32 +0000 | [diff] [blame] | 5 | #include <asm/asm-compat.h> |
| 6 | #include <asm/feature-fixups.h> |
| 7 | |
| 8 | /* |
| 9 | * MMU features bit definitions |
| 10 | */ |
| 11 | |
| 12 | /* |
| 13 | * First half is MMU families |
| 14 | */ |
| 15 | #define MMU_FTR_HPTE_TABLE ASM_CONST(0x00000001) |
| 16 | #define MMU_FTR_TYPE_8xx ASM_CONST(0x00000002) |
| 17 | #define MMU_FTR_TYPE_40x ASM_CONST(0x00000004) |
| 18 | #define MMU_FTR_TYPE_44x ASM_CONST(0x00000008) |
| 19 | #define MMU_FTR_TYPE_FSL_E ASM_CONST(0x00000010) |
Benjamin Herrenschmidt | 57e2a99 | 2009-07-28 11:59:34 +1000 | [diff] [blame] | 20 | #define MMU_FTR_TYPE_3E ASM_CONST(0x00000020) |
Benjamin Herrenschmidt | 7c03d65 | 2008-12-18 19:13:32 +0000 | [diff] [blame] | 21 | |
| 22 | /* |
| 23 | * This is individual features |
| 24 | */ |
| 25 | |
| 26 | /* Enable use of high BAT registers */ |
| 27 | #define MMU_FTR_USE_HIGH_BATS ASM_CONST(0x00010000) |
| 28 | |
| 29 | /* Enable >32-bit physical addresses on 32-bit processor, only used |
| 30 | * by CONFIG_6xx currently as BookE supports that from day 1 |
| 31 | */ |
| 32 | #define MMU_FTR_BIG_PHYS ASM_CONST(0x00020000) |
| 33 | |
Benjamin Herrenschmidt | f048aac | 2008-12-18 19:13:38 +0000 | [diff] [blame] | 34 | /* Enable use of broadcast TLB invalidations. We don't always set it |
| 35 | * on processors that support it due to other constraints with the |
| 36 | * use of such invalidations |
| 37 | */ |
| 38 | #define MMU_FTR_USE_TLBIVAX_BCAST ASM_CONST(0x00040000) |
| 39 | |
Kumar Gala | c307195 | 2009-02-10 22:26:06 -0600 | [diff] [blame] | 40 | /* Enable use of tlbilx invalidate instructions. |
Benjamin Herrenschmidt | f048aac | 2008-12-18 19:13:38 +0000 | [diff] [blame] | 41 | */ |
Kumar Gala | c307195 | 2009-02-10 22:26:06 -0600 | [diff] [blame] | 42 | #define MMU_FTR_USE_TLBILX ASM_CONST(0x00080000) |
Benjamin Herrenschmidt | f048aac | 2008-12-18 19:13:38 +0000 | [diff] [blame] | 43 | |
| 44 | /* This indicates that the processor cannot handle multiple outstanding |
| 45 | * broadcast tlbivax or tlbsync. This makes the code use a spinlock |
| 46 | * around such invalidate forms. |
| 47 | */ |
| 48 | #define MMU_FTR_LOCK_BCAST_INVAL ASM_CONST(0x00100000) |
| 49 | |
Kumar Gala | 2319f12 | 2009-03-19 03:55:41 +0000 | [diff] [blame] | 50 | /* This indicates that the processor doesn't handle way selection |
| 51 | * properly and needs SW to track and update the LRU state. This |
| 52 | * is specific to an errata on e300c2/c3/c4 class parts |
| 53 | */ |
| 54 | #define MMU_FTR_NEED_DTLB_SW_LRU ASM_CONST(0x00200000) |
| 55 | |
Milton Miller | 60dbf43 | 2009-04-29 20:58:01 +0000 | [diff] [blame] | 56 | /* This indicates that the processor uses the ISA 2.06 server tlbie |
| 57 | * mnemonics |
| 58 | */ |
| 59 | #define MMU_FTR_TLBIE_206 ASM_CONST(0x00400000) |
| 60 | |
Benjamin Herrenschmidt | 7c03d65 | 2008-12-18 19:13:32 +0000 | [diff] [blame] | 61 | #ifndef __ASSEMBLY__ |
| 62 | #include <asm/cputable.h> |
| 63 | |
| 64 | static inline int mmu_has_feature(unsigned long feature) |
| 65 | { |
| 66 | return (cur_cpu_spec->mmu_features & feature); |
| 67 | } |
| 68 | |
| 69 | extern unsigned int __start___mmu_ftr_fixup, __stop___mmu_ftr_fixup; |
| 70 | |
Benjamin Herrenschmidt | 757c74d | 2009-03-19 19:34:16 +0000 | [diff] [blame] | 71 | /* MMU initialization (64-bit only fo now) */ |
| 72 | extern void early_init_mmu(void); |
| 73 | extern void early_init_mmu_secondary(void); |
| 74 | |
Benjamin Herrenschmidt | 7c03d65 | 2008-12-18 19:13:32 +0000 | [diff] [blame] | 75 | #endif /* !__ASSEMBLY__ */ |
| 76 | |
Benjamin Herrenschmidt | 57e2a99 | 2009-07-28 11:59:34 +1000 | [diff] [blame] | 77 | /* The kernel use the constants below to index in the page sizes array. |
| 78 | * The use of fixed constants for this purpose is better for performances |
| 79 | * of the low level hash refill handlers. |
| 80 | * |
| 81 | * A non supported page size has a "shift" field set to 0 |
| 82 | * |
| 83 | * Any new page size being implemented can get a new entry in here. Whether |
| 84 | * the kernel will use it or not is a different matter though. The actual page |
| 85 | * size used by hugetlbfs is not defined here and may be made variable |
| 86 | * |
| 87 | * Note: This array ended up being a false good idea as it's growing to the |
| 88 | * point where I wonder if we should replace it with something different, |
| 89 | * to think about, feedback welcome. --BenH. |
| 90 | */ |
| 91 | |
| 92 | /* There are #define as they have to be used in assembly |
| 93 | * |
| 94 | * WARNING: If you change this list, make sure to update the array of |
| 95 | * names currently in arch/powerpc/mm/hugetlbpage.c or bad things will |
| 96 | * happen |
| 97 | */ |
| 98 | #define MMU_PAGE_4K 0 |
| 99 | #define MMU_PAGE_16K 1 |
| 100 | #define MMU_PAGE_64K 2 |
| 101 | #define MMU_PAGE_64K_AP 3 /* "Admixed pages" (hash64 only) */ |
| 102 | #define MMU_PAGE_256K 4 |
| 103 | #define MMU_PAGE_1M 5 |
| 104 | #define MMU_PAGE_8M 6 |
| 105 | #define MMU_PAGE_16M 7 |
| 106 | #define MMU_PAGE_256M 8 |
| 107 | #define MMU_PAGE_1G 9 |
| 108 | #define MMU_PAGE_16G 10 |
| 109 | #define MMU_PAGE_64G 11 |
| 110 | #define MMU_PAGE_COUNT 12 |
| 111 | |
Benjamin Herrenschmidt | 7c03d65 | 2008-12-18 19:13:32 +0000 | [diff] [blame] | 112 | |
Benjamin Herrenschmidt | 9449168 | 2009-06-02 21:17:45 +0000 | [diff] [blame] | 113 | #if defined(CONFIG_PPC_STD_MMU_64) |
David Gibson | 8d2169e | 2007-04-27 11:53:52 +1000 | [diff] [blame] | 114 | /* 64-bit classic hash table MMU */ |
| 115 | # include <asm/mmu-hash64.h> |
Benjamin Herrenschmidt | 9449168 | 2009-06-02 21:17:45 +0000 | [diff] [blame] | 116 | #elif defined(CONFIG_PPC_STD_MMU_32) |
David Gibson | 4db68bf | 2007-06-13 14:52:54 +1000 | [diff] [blame] | 117 | /* 32-bit classic hash table MMU */ |
| 118 | # include <asm/mmu-hash32.h> |
Josh Boyer | 4d922c8 | 2007-08-20 07:28:48 -0500 | [diff] [blame] | 119 | #elif defined(CONFIG_40x) |
| 120 | /* 40x-style software loaded TLB */ |
| 121 | # include <asm/mmu-40x.h> |
David Gibson | 57d7909 | 2007-04-30 14:06:25 +1000 | [diff] [blame] | 122 | #elif defined(CONFIG_44x) |
| 123 | /* 44x-style software loaded TLB */ |
| 124 | # include <asm/mmu-44x.h> |
Kumar Gala | 70fe3af | 2009-02-12 16:12:40 -0600 | [diff] [blame] | 125 | #elif defined(CONFIG_PPC_BOOK3E_MMU) |
| 126 | /* Freescale Book-E software loaded TLB or Book-3e (ISA 2.06+) MMU */ |
| 127 | # include <asm/mmu-book3e.h> |
David Gibson | 3120234 | 2007-06-22 14:58:55 +1000 | [diff] [blame] | 128 | #elif defined (CONFIG_PPC_8xx) |
| 129 | /* Motorola/Freescale 8xx software loaded TLB */ |
| 130 | # include <asm/mmu-8xx.h> |
David Gibson | 1f8d419 | 2005-05-05 16:15:13 -0700 | [diff] [blame] | 131 | #endif |
David Gibson | 1f8d419 | 2005-05-05 16:15:13 -0700 | [diff] [blame] | 132 | |
Benjamin Herrenschmidt | 57e2a99 | 2009-07-28 11:59:34 +1000 | [diff] [blame] | 133 | |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 134 | #endif /* __KERNEL__ */ |
Paul Mackerras | 047ea78 | 2005-11-19 20:17:32 +1100 | [diff] [blame] | 135 | #endif /* _ASM_POWERPC_MMU_H_ */ |