arch/powerpc/include/asm/mmu.h

   1 #ifndef _ASM_POWERPC_MMU_H_
   2 #define _ASM_POWERPC_MMU_H_
   3 #ifdef __KERNEL__
   4
   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)
  20
  21 /*
  22  * This is individual features
  23  */
  24
  25 /* Enable use of high BAT registers */
  26 #define MMU_FTR_USE_HIGH_BATS           ASM_CONST(0x00010000)
  27
  28 /* Enable >32-bit physical addresses on 32-bit processor, only used
  29  * by CONFIG_6xx currently as BookE supports that from day 1
  30  */
  31 #define MMU_FTR_BIG_PHYS                ASM_CONST(0x00020000)
  32
  33 /* Enable use of broadcast TLB invalidations. We don't always set it
  34  * on processors that support it due to other constraints with the
  35  * use of such invalidations
  36  */
  37 #define MMU_FTR_USE_TLBIVAX_BCAST       ASM_CONST(0x00040000)
  38
  39 /* Enable use of tlbilx invalidate instructions.
  40  */
  41 #define MMU_FTR_USE_TLBILX              ASM_CONST(0x00080000)
  42
  43 /* This indicates that the processor cannot handle multiple outstanding
  44  * broadcast tlbivax or tlbsync. This makes the code use a spinlock
  45  * around such invalidate forms.
  46  */
  47 #define MMU_FTR_LOCK_BCAST_INVAL        ASM_CONST(0x00100000)
  48
  49 /* This indicates that the processor doesn't handle way selection
  50  * properly and needs SW to track and update the LRU state.  This
  51  * is specific to an errata on e300c2/c3/c4 class parts
  52  */
  53 #define MMU_FTR_NEED_DTLB_SW_LRU        ASM_CONST(0x00200000)
  54
  55 #ifndef __ASSEMBLY__
  56 #include <asm/cputable.h>
  57
  58 static inline int mmu_has_feature(unsigned long feature)
  59 {
  60         return (cur_cpu_spec->mmu_features & feature);
  61 }
  62
  63 extern unsigned int __start___mmu_ftr_fixup, __stop___mmu_ftr_fixup;
  64
  65 #endif /* !__ASSEMBLY__ */
  66
  67
  68 #ifdef CONFIG_PPC64
  69 /* 64-bit classic hash table MMU */
  70 #  include <asm/mmu-hash64.h>
  71 #elif defined(CONFIG_PPC_STD_MMU)
  72 /* 32-bit classic hash table MMU */
  73 #  include <asm/mmu-hash32.h>
  74 #elif defined(CONFIG_40x)
  75 /* 40x-style software loaded TLB */
  76 #  include <asm/mmu-40x.h>
  77 #elif defined(CONFIG_44x)
  78 /* 44x-style software loaded TLB */
  79 #  include <asm/mmu-44x.h>
  80 #elif defined(CONFIG_PPC_BOOK3E_MMU)
  81 /* Freescale Book-E software loaded TLB or Book-3e (ISA 2.06+) MMU */
  82 #  include <asm/mmu-book3e.h>
  83 #elif defined (CONFIG_PPC_8xx)
  84 /* Motorola/Freescale 8xx software loaded TLB */
  85 #  include <asm/mmu-8xx.h>
  86 #endif
  87
  88 #endif /* __KERNEL__ */
  89 #endif /* _ASM_POWERPC_MMU_H_ */