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Diffstat (limited to 'include/asm-arm/tlbflush.h')
| -rw-r--r-- | include/asm-arm/tlbflush.h | 500 |
1 files changed, 0 insertions, 500 deletions
diff --git a/include/asm-arm/tlbflush.h b/include/asm-arm/tlbflush.h deleted file mode 100644 index 909656c..0000000 --- a/include/asm-arm/tlbflush.h +++ /dev/null @@ -1,500 +0,0 @@ -/* - * linux/include/asm-arm/tlbflush.h - * - * Copyright (C) 1999-2003 Russell King - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#ifndef _ASMARM_TLBFLUSH_H -#define _ASMARM_TLBFLUSH_H - - -#ifndef CONFIG_MMU - -#define tlb_flush(tlb) ((void) tlb) - -#else /* CONFIG_MMU */ - -#include <asm/glue.h> - -#define TLB_V3_PAGE (1 << 0) -#define TLB_V4_U_PAGE (1 << 1) -#define TLB_V4_D_PAGE (1 << 2) -#define TLB_V4_I_PAGE (1 << 3) -#define TLB_V6_U_PAGE (1 << 4) -#define TLB_V6_D_PAGE (1 << 5) -#define TLB_V6_I_PAGE (1 << 6) - -#define TLB_V3_FULL (1 << 8) -#define TLB_V4_U_FULL (1 << 9) -#define TLB_V4_D_FULL (1 << 10) -#define TLB_V4_I_FULL (1 << 11) -#define TLB_V6_U_FULL (1 << 12) -#define TLB_V6_D_FULL (1 << 13) -#define TLB_V6_I_FULL (1 << 14) - -#define TLB_V6_U_ASID (1 << 16) -#define TLB_V6_D_ASID (1 << 17) -#define TLB_V6_I_ASID (1 << 18) - -#define TLB_L2CLEAN_FR (1 << 29) /* Feroceon */ -#define TLB_DCLEAN (1 << 30) -#define TLB_WB (1 << 31) - -/* - * MMU TLB Model - * ============= - * - * We have the following to choose from: - * v3 - ARMv3 - * v4 - ARMv4 without write buffer - * v4wb - ARMv4 with write buffer without I TLB flush entry instruction - * v4wbi - ARMv4 with write buffer with I TLB flush entry instruction - * fr - Feroceon (v4wbi with non-outer-cacheable page table walks) - * v6wbi - ARMv6 with write buffer with I TLB flush entry instruction - */ -#undef _TLB -#undef MULTI_TLB - -#define v3_tlb_flags (TLB_V3_FULL | TLB_V3_PAGE) - -#ifdef CONFIG_CPU_TLB_V3 -# define v3_possible_flags v3_tlb_flags -# define v3_always_flags v3_tlb_flags -# ifdef _TLB -# define MULTI_TLB 1 -# else -# define _TLB v3 -# endif -#else -# define v3_possible_flags 0 -# define v3_always_flags (-1UL) -#endif - -#define v4_tlb_flags (TLB_V4_U_FULL | TLB_V4_U_PAGE) - -#ifdef CONFIG_CPU_TLB_V4WT -# define v4_possible_flags v4_tlb_flags -# define v4_always_flags v4_tlb_flags -# ifdef _TLB -# define MULTI_TLB 1 -# else -# define _TLB v4 -# endif -#else -# define v4_possible_flags 0 -# define v4_always_flags (-1UL) -#endif - -#define v4wbi_tlb_flags (TLB_WB | TLB_DCLEAN | \ - TLB_V4_I_FULL | TLB_V4_D_FULL | \ - TLB_V4_I_PAGE | TLB_V4_D_PAGE) - -#ifdef CONFIG_CPU_TLB_V4WBI -# define v4wbi_possible_flags v4wbi_tlb_flags -# define v4wbi_always_flags v4wbi_tlb_flags -# ifdef _TLB -# define MULTI_TLB 1 -# else -# define _TLB v4wbi -# endif -#else -# define v4wbi_possible_flags 0 -# define v4wbi_always_flags (-1UL) -#endif - -#define fr_tlb_flags (TLB_WB | TLB_DCLEAN | TLB_L2CLEAN_FR | \ - TLB_V4_I_FULL | TLB_V4_D_FULL | \ - TLB_V4_I_PAGE | TLB_V4_D_PAGE) - -#ifdef CONFIG_CPU_TLB_FEROCEON -# define fr_possible_flags fr_tlb_flags -# define fr_always_flags fr_tlb_flags -# ifdef _TLB -# define MULTI_TLB 1 -# else -# define _TLB v4wbi -# endif -#else -# define fr_possible_flags 0 -# define fr_always_flags (-1UL) -#endif - -#define v4wb_tlb_flags (TLB_WB | TLB_DCLEAN | \ - TLB_V4_I_FULL | TLB_V4_D_FULL | \ - TLB_V4_D_PAGE) - -#ifdef CONFIG_CPU_TLB_V4WB -# define v4wb_possible_flags v4wb_tlb_flags -# define v4wb_always_flags v4wb_tlb_flags -# ifdef _TLB -# define MULTI_TLB 1 -# else -# define _TLB v4wb -# endif -#else -# define v4wb_possible_flags 0 -# define v4wb_always_flags (-1UL) -#endif - -#define v6wbi_tlb_flags (TLB_WB | TLB_DCLEAN | \ - TLB_V6_I_FULL | TLB_V6_D_FULL | \ - TLB_V6_I_PAGE | TLB_V6_D_PAGE | \ - TLB_V6_I_ASID | TLB_V6_D_ASID) - -#ifdef CONFIG_CPU_TLB_V6 -# define v6wbi_possible_flags v6wbi_tlb_flags -# define v6wbi_always_flags v6wbi_tlb_flags -# ifdef _TLB -# define MULTI_TLB 1 -# else -# define _TLB v6wbi -# endif -#else -# define v6wbi_possible_flags 0 -# define v6wbi_always_flags (-1UL) -#endif - -#ifdef CONFIG_CPU_TLB_V7 -# define v7wbi_possible_flags v6wbi_tlb_flags -# define v7wbi_always_flags v6wbi_tlb_flags -# ifdef _TLB -# define MULTI_TLB 1 -# else -# define _TLB v7wbi -# endif -#else -# define v7wbi_possible_flags 0 -# define v7wbi_always_flags (-1UL) -#endif - -#ifndef _TLB -#error Unknown TLB model -#endif - -#ifndef __ASSEMBLY__ - -#include <linux/sched.h> - -struct cpu_tlb_fns { - void (*flush_user_range)(unsigned long, unsigned long, struct vm_area_struct *); - void (*flush_kern_range)(unsigned long, unsigned long); - unsigned long tlb_flags; -}; - -/* - * Select the calling method - */ -#ifdef MULTI_TLB - -#define __cpu_flush_user_tlb_range cpu_tlb.flush_user_range -#define __cpu_flush_kern_tlb_range cpu_tlb.flush_kern_range - -#else - -#define __cpu_flush_user_tlb_range __glue(_TLB,_flush_user_tlb_range) -#define __cpu_flush_kern_tlb_range __glue(_TLB,_flush_kern_tlb_range) - -extern void __cpu_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *); -extern void __cpu_flush_kern_tlb_range(unsigned long, unsigned long); - -#endif - -extern struct cpu_tlb_fns cpu_tlb; - -#define __cpu_tlb_flags cpu_tlb.tlb_flags - -/* - * TLB Management - * ============== - * - * The arch/arm/mm/tlb-*.S files implement these methods. - * - * The TLB specific code is expected to perform whatever tests it - * needs to determine if it should invalidate the TLB for each - * call. Start addresses are inclusive and end addresses are - * exclusive; it is safe to round these addresses down. - * - * flush_tlb_all() - * - * Invalidate the entire TLB. - * - * flush_tlb_mm(mm) - * - * Invalidate all TLB entries in a particular address - * space. - * - mm - mm_struct describing address space - * - * flush_tlb_range(mm,start,end) - * - * Invalidate a range of TLB entries in the specified - * address space. - * - mm - mm_struct describing address space - * - start - start address (may not be aligned) - * - end - end address (exclusive, may not be aligned) - * - * flush_tlb_page(vaddr,vma) - * - * Invalidate the specified page in the specified address range. - * - vaddr - virtual address (may not be aligned) - * - vma - vma_struct describing address range - * - * flush_kern_tlb_page(kaddr) - * - * Invalidate the TLB entry for the specified page. The address - * will be in the kernels virtual memory space. Current uses - * only require the D-TLB to be invalidated. - * - kaddr - Kernel virtual memory address - */ - -/* - * We optimise the code below by: - * - building a set of TLB flags that might be set in __cpu_tlb_flags - * - building a set of TLB flags that will always be set in __cpu_tlb_flags - * - if we're going to need __cpu_tlb_flags, access it once and only once - * - * This allows us to build optimal assembly for the single-CPU type case, - * and as close to optimal given the compiler constrants for multi-CPU - * case. We could do better for the multi-CPU case if the compiler - * implemented the "%?" method, but this has been discontinued due to too - * many people getting it wrong. - */ -#define possible_tlb_flags (v3_possible_flags | \ - v4_possible_flags | \ - v4wbi_possible_flags | \ - fr_possible_flags | \ - v4wb_possible_flags | \ - v6wbi_possible_flags) - -#define always_tlb_flags (v3_always_flags & \ - v4_always_flags & \ - v4wbi_always_flags & \ - fr_always_flags & \ - v4wb_always_flags & \ - v6wbi_always_flags) - -#define tlb_flag(f) ((always_tlb_flags & (f)) || (__tlb_flag & possible_tlb_flags & (f))) - -static inline void local_flush_tlb_all(void) -{ - const int zero = 0; - const unsigned int __tlb_flag = __cpu_tlb_flags; - - if (tlb_flag(TLB_WB)) - dsb(); - - if (tlb_flag(TLB_V3_FULL)) - asm("mcr p15, 0, %0, c6, c0, 0" : : "r" (zero) : "cc"); - if (tlb_flag(TLB_V4_U_FULL | TLB_V6_U_FULL)) - asm("mcr p15, 0, %0, c8, c7, 0" : : "r" (zero) : "cc"); - if (tlb_flag(TLB_V4_D_FULL | TLB_V6_D_FULL)) - asm("mcr p15, 0, %0, c8, c6, 0" : : "r" (zero) : "cc"); - if (tlb_flag(TLB_V4_I_FULL | TLB_V6_I_FULL)) - asm("mcr p15, 0, %0, c8, c5, 0" : : "r" (zero) : "cc"); - - if (tlb_flag(TLB_V6_I_FULL | TLB_V6_D_FULL | - TLB_V6_I_PAGE | TLB_V6_D_PAGE | - TLB_V6_I_ASID | TLB_V6_D_ASID)) { - /* flush the branch target cache */ - asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero) : "cc"); - dsb(); - isb(); - } -} - -static inline void local_flush_tlb_mm(struct mm_struct *mm) -{ - const int zero = 0; - const int asid = ASID(mm); - const unsigned int __tlb_flag = __cpu_tlb_flags; - - if (tlb_flag(TLB_WB)) - dsb(); - - if (cpu_isset(smp_processor_id(), mm->cpu_vm_mask)) { - if (tlb_flag(TLB_V3_FULL)) - asm("mcr p15, 0, %0, c6, c0, 0" : : "r" (zero) : "cc"); - if (tlb_flag(TLB_V4_U_FULL)) - asm("mcr p15, 0, %0, c8, c7, 0" : : "r" (zero) : "cc"); - if (tlb_flag(TLB_V4_D_FULL)) - asm("mcr p15, 0, %0, c8, c6, 0" : : "r" (zero) : "cc"); - if (tlb_flag(TLB_V4_I_FULL)) - asm("mcr p15, 0, %0, c8, c5, 0" : : "r" (zero) : "cc"); - } - - if (tlb_flag(TLB_V6_U_ASID)) - asm("mcr p15, 0, %0, c8, c7, 2" : : "r" (asid) : "cc"); - if (tlb_flag(TLB_V6_D_ASID)) - asm("mcr p15, 0, %0, c8, c6, 2" : : "r" (asid) : "cc"); - if (tlb_flag(TLB_V6_I_ASID)) - asm("mcr p15, 0, %0, c8, c5, 2" : : "r" (asid) : "cc"); - - if (tlb_flag(TLB_V6_I_FULL | TLB_V6_D_FULL | - TLB_V6_I_PAGE | TLB_V6_D_PAGE | - TLB_V6_I_ASID | TLB_V6_D_ASID)) { - /* flush the branch target cache */ - asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero) : "cc"); - dsb(); - } -} - -static inline void -local_flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr) -{ - const int zero = 0; - const unsigned int __tlb_flag = __cpu_tlb_flags; - - uaddr = (uaddr & PAGE_MASK) | ASID(vma->vm_mm); - - if (tlb_flag(TLB_WB)) - dsb(); - - if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask)) { - if (tlb_flag(TLB_V3_PAGE)) - asm("mcr p15, 0, %0, c6, c0, 0" : : "r" (uaddr) : "cc"); - if (tlb_flag(TLB_V4_U_PAGE)) - asm("mcr p15, 0, %0, c8, c7, 1" : : "r" (uaddr) : "cc"); - if (tlb_flag(TLB_V4_D_PAGE)) - asm("mcr p15, 0, %0, c8, c6, 1" : : "r" (uaddr) : "cc"); - if (tlb_flag(TLB_V4_I_PAGE)) - asm("mcr p15, 0, %0, c8, c5, 1" : : "r" (uaddr) : "cc"); - if (!tlb_flag(TLB_V4_I_PAGE) && tlb_flag(TLB_V4_I_FULL)) - asm("mcr p15, 0, %0, c8, c5, 0" : : "r" (zero) : "cc"); - } - - if (tlb_flag(TLB_V6_U_PAGE)) - asm("mcr p15, 0, %0, c8, c7, 1" : : "r" (uaddr) : "cc"); - if (tlb_flag(TLB_V6_D_PAGE)) - asm("mcr p15, 0, %0, c8, c6, 1" : : "r" (uaddr) : "cc"); - if (tlb_flag(TLB_V6_I_PAGE)) - asm("mcr p15, 0, %0, c8, c5, 1" : : "r" (uaddr) : "cc"); - - if (tlb_flag(TLB_V6_I_FULL | TLB_V6_D_FULL | - TLB_V6_I_PAGE | TLB_V6_D_PAGE | - TLB_V6_I_ASID | TLB_V6_D_ASID)) { - /* flush the branch target cache */ - asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero) : "cc"); - dsb(); - } -} - -static inline void local_flush_tlb_kernel_page(unsigned long kaddr) -{ - const int zero = 0; - const unsigned int __tlb_flag = __cpu_tlb_flags; - - kaddr &= PAGE_MASK; - - if (tlb_flag(TLB_WB)) - dsb(); - - if (tlb_flag(TLB_V3_PAGE)) - asm("mcr p15, 0, %0, c6, c0, 0" : : "r" (kaddr) : "cc"); - if (tlb_flag(TLB_V4_U_PAGE)) - asm("mcr p15, 0, %0, c8, c7, 1" : : "r" (kaddr) : "cc"); - if (tlb_flag(TLB_V4_D_PAGE)) - asm("mcr p15, 0, %0, c8, c6, 1" : : "r" (kaddr) : "cc"); - if (tlb_flag(TLB_V4_I_PAGE)) - asm("mcr p15, 0, %0, c8, c5, 1" : : "r" (kaddr) : "cc"); - if (!tlb_flag(TLB_V4_I_PAGE) && tlb_flag(TLB_V4_I_FULL)) - asm("mcr p15, 0, %0, c8, c5, 0" : : "r" (zero) : "cc"); - - if (tlb_flag(TLB_V6_U_PAGE)) - asm("mcr p15, 0, %0, c8, c7, 1" : : "r" (kaddr) : "cc"); - if (tlb_flag(TLB_V6_D_PAGE)) - asm("mcr p15, 0, %0, c8, c6, 1" : : "r" (kaddr) : "cc"); - if (tlb_flag(TLB_V6_I_PAGE)) - asm("mcr p15, 0, %0, c8, c5, 1" : : "r" (kaddr) : "cc"); - - if (tlb_flag(TLB_V6_I_FULL | TLB_V6_D_FULL | - TLB_V6_I_PAGE | TLB_V6_D_PAGE | - TLB_V6_I_ASID | TLB_V6_D_ASID)) { - /* flush the branch target cache */ - asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero) : "cc"); - dsb(); - isb(); - } -} - -/* - * flush_pmd_entry - * - * Flush a PMD entry (word aligned, or double-word aligned) to - * RAM if the TLB for the CPU we are running on requires this. - * This is typically used when we are creating PMD entries. - * - * clean_pmd_entry - * - * Clean (but don't drain the write buffer) if the CPU requires - * these operations. This is typically used when we are removing - * PMD entries. - */ -static inline void flush_pmd_entry(pmd_t *pmd) -{ - const unsigned int __tlb_flag = __cpu_tlb_flags; - - if (tlb_flag(TLB_DCLEAN)) - asm("mcr p15, 0, %0, c7, c10, 1 @ flush_pmd" - : : "r" (pmd) : "cc"); - - if (tlb_flag(TLB_L2CLEAN_FR)) - asm("mcr p15, 1, %0, c15, c9, 1 @ L2 flush_pmd" - : : "r" (pmd) : "cc"); - - if (tlb_flag(TLB_WB)) - dsb(); -} - -static inline void clean_pmd_entry(pmd_t *pmd) -{ - const unsigned int __tlb_flag = __cpu_tlb_flags; - - if (tlb_flag(TLB_DCLEAN)) - asm("mcr p15, 0, %0, c7, c10, 1 @ flush_pmd" - : : "r" (pmd) : "cc"); - - if (tlb_flag(TLB_L2CLEAN_FR)) - asm("mcr p15, 1, %0, c15, c9, 1 @ L2 flush_pmd" - : : "r" (pmd) : "cc"); -} - -#undef tlb_flag -#undef always_tlb_flags -#undef possible_tlb_flags - -/* - * Convert calls to our calling convention. - */ -#define local_flush_tlb_range(vma,start,end) __cpu_flush_user_tlb_range(start,end,vma) -#define local_flush_tlb_kernel_range(s,e) __cpu_flush_kern_tlb_range(s,e) - -#ifndef CONFIG_SMP -#define flush_tlb_all local_flush_tlb_all -#define flush_tlb_mm local_flush_tlb_mm -#define flush_tlb_page local_flush_tlb_page -#define flush_tlb_kernel_page local_flush_tlb_kernel_page -#define flush_tlb_range local_flush_tlb_range -#define flush_tlb_kernel_range local_flush_tlb_kernel_range -#else -extern void flush_tlb_all(void); -extern void flush_tlb_mm(struct mm_struct *mm); -extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr); -extern void flush_tlb_kernel_page(unsigned long kaddr); -extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end); -extern void flush_tlb_kernel_range(unsigned long start, unsigned long end); -#endif - -/* - * if PG_dcache_dirty is set for the page, we need to ensure that any - * cache entries for the kernels virtual memory range are written - * back to the page. - */ -extern void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr, pte_t pte); - -#endif - -#endif /* CONFIG_MMU */ - -#endif |