#ifndef _ASM_POWERPC_MMU_H_ #define _ASM_POWERPC_MMU_H_ #ifdef __KERNEL__ #include <linux/types.h> #include <asm/asm-compat.h> #include <asm/feature-fixups.h> /* * MMU features bit definitions */ /* * First half is MMU families */ #define MMU_FTR_HPTE_TABLE ASM_CONST(0x00000001) #define MMU_FTR_TYPE_8xx ASM_CONST(0x00000002) #define MMU_FTR_TYPE_40x ASM_CONST(0x00000004) #define MMU_FTR_TYPE_44x ASM_CONST(0x00000008) #define MMU_FTR_TYPE_FSL_E ASM_CONST(0x00000010) #define MMU_FTR_TYPE_47x ASM_CONST(0x00000020) /* * This is individual features */ /* Enable use of high BAT registers */ #define MMU_FTR_USE_HIGH_BATS ASM_CONST(0x00010000) /* Enable >32-bit physical addresses on 32-bit processor, only used * by CONFIG_6xx currently as BookE supports that from day 1 */ #define MMU_FTR_BIG_PHYS ASM_CONST(0x00020000) /* Enable use of broadcast TLB invalidations. We don't always set it * on processors that support it due to other constraints with the * use of such invalidations */ #define MMU_FTR_USE_TLBIVAX_BCAST ASM_CONST(0x00040000) /* Enable use of tlbilx invalidate instructions. */ #define MMU_FTR_USE_TLBILX ASM_CONST(0x00080000) /* This indicates that the processor cannot handle multiple outstanding * broadcast tlbivax or tlbsync. This makes the code use a spinlock * around such invalidate forms. */ #define MMU_FTR_LOCK_BCAST_INVAL ASM_CONST(0x00100000) /* This indicates that the processor doesn't handle way selection * properly and needs SW to track and update the LRU state. This * is specific to an errata on e300c2/c3/c4 class parts */ #define MMU_FTR_NEED_DTLB_SW_LRU ASM_CONST(0x00200000) /* Enable use of TLB reservation. Processor should support tlbsrx. * instruction and MAS0[WQ]. */ #define MMU_FTR_USE_TLBRSRV ASM_CONST(0x00800000) /* Use paired MAS registers (MAS7||MAS3, etc.) */ #define MMU_FTR_USE_PAIRED_MAS ASM_CONST(0x01000000) /* Doesn't support the B bit (1T segment) in SLBIE */ #define MMU_FTR_NO_SLBIE_B ASM_CONST(0x02000000) /* Support 16M large pages */ #define MMU_FTR_16M_PAGE ASM_CONST(0x04000000) /* Supports TLBIEL variant */ #define MMU_FTR_TLBIEL ASM_CONST(0x08000000) /* Supports tlbies w/o locking */ #define MMU_FTR_LOCKLESS_TLBIE ASM_CONST(0x10000000) /* Large pages can be marked CI */ #define MMU_FTR_CI_LARGE_PAGE ASM_CONST(0x20000000) /* 1T segments available */ #define MMU_FTR_1T_SEGMENT ASM_CONST(0x40000000) /* MMU feature bit sets for various CPUs */ #define MMU_FTRS_DEFAULT_HPTE_ARCH_V2 \ MMU_FTR_HPTE_TABLE | MMU_FTR_PPCAS_ARCH_V2 #define MMU_FTRS_POWER4 MMU_FTRS_DEFAULT_HPTE_ARCH_V2 #define MMU_FTRS_PPC970 MMU_FTRS_POWER4 #define MMU_FTRS_POWER5 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE #define MMU_FTRS_POWER6 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE #define MMU_FTRS_POWER7 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE #define MMU_FTRS_POWER8 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE #define MMU_FTRS_CELL MMU_FTRS_DEFAULT_HPTE_ARCH_V2 | \ MMU_FTR_CI_LARGE_PAGE #define MMU_FTRS_PA6T MMU_FTRS_DEFAULT_HPTE_ARCH_V2 | \ MMU_FTR_CI_LARGE_PAGE | MMU_FTR_NO_SLBIE_B #ifndef __ASSEMBLY__ #include <asm/cputable.h> #ifdef CONFIG_PPC_FSL_BOOK3E #include <asm/percpu.h> DECLARE_PER_CPU(int, next_tlbcam_idx); #endif static inline int mmu_has_feature(unsigned long feature) { return (cur_cpu_spec->mmu_features & feature); } static inline void mmu_clear_feature(unsigned long feature) { cur_cpu_spec->mmu_features &= ~feature; } extern unsigned int __start___mmu_ftr_fixup, __stop___mmu_ftr_fixup; /* MMU initialization */ extern void early_init_mmu(void); extern void early_init_mmu_secondary(void); extern void setup_initial_memory_limit(phys_addr_t first_memblock_base, phys_addr_t first_memblock_size); #ifdef CONFIG_PPC64 /* This is our real memory area size on ppc64 server, on embedded, we * make it match the size our of bolted TLB area */ extern u64 ppc64_rma_size; #endif /* CONFIG_PPC64 */ struct mm_struct; #ifdef CONFIG_DEBUG_VM extern void assert_pte_locked(struct mm_struct *mm, unsigned long addr); #else /* CONFIG_DEBUG_VM */ static inline void assert_pte_locked(struct mm_struct *mm, unsigned long addr) { } #endif /* !CONFIG_DEBUG_VM */ #endif /* !__ASSEMBLY__ */ /* The kernel use the constants below to index in the page sizes array. * The use of fixed constants for this purpose is better for performances * of the low level hash refill handlers. * * A non supported page size has a "shift" field set to 0 * * Any new page size being implemented can get a new entry in here. Whether * the kernel will use it or not is a different matter though. The actual page * size used by hugetlbfs is not defined here and may be made variable * * Note: This array ended up being a false good idea as it's growing to the * point where I wonder if we should replace it with something different, * to think about, feedback welcome. --BenH. */ /* These are #defines as they have to be used in assembly */ #define MMU_PAGE_4K 0 #define MMU_PAGE_16K 1 #define MMU_PAGE_64K 2 #define MMU_PAGE_64K_AP 3 /* "Admixed pages" (hash64 only) */ #define MMU_PAGE_256K 4 #define MMU_PAGE_1M 5 #define MMU_PAGE_2M 6 #define MMU_PAGE_4M 7 #define MMU_PAGE_8M 8 #define MMU_PAGE_16M 9 #define MMU_PAGE_64M 10 #define MMU_PAGE_256M 11 #define MMU_PAGE_1G 12 #define MMU_PAGE_16G 13 #define MMU_PAGE_64G 14 #define MMU_PAGE_COUNT 15 #if defined(CONFIG_PPC_STD_MMU_64) /* 64-bit classic hash table MMU */ # include <asm/mmu-hash64.h> #elif defined(CONFIG_PPC_STD_MMU_32) /* 32-bit classic hash table MMU */ # include <asm/mmu-hash32.h> #elif defined(CONFIG_40x) /* 40x-style software loaded TLB */ # include <asm/mmu-40x.h> #elif defined(CONFIG_44x) /* 44x-style software loaded TLB */ # include <asm/mmu-44x.h> #elif defined(CONFIG_PPC_BOOK3E_MMU) /* Freescale Book-E software loaded TLB or Book-3e (ISA 2.06+) MMU */ # include <asm/mmu-book3e.h> #elif defined (CONFIG_PPC_8xx) /* Motorola/Freescale 8xx software loaded TLB */ # include <asm/mmu-8xx.h> #endif #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_MMU_H_ */