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Diffstat (limited to 'include/asm-ppc/tlbflush.h')
| -rw-r--r-- | include/asm-ppc/tlbflush.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/include/asm-ppc/tlbflush.h b/include/asm-ppc/tlbflush.h new file mode 100644 index 000000000000..9850f53f54b0 --- /dev/null +++ b/include/asm-ppc/tlbflush.h @@ -0,0 +1,115 @@ +/* + * include/asm-ppc/tlbflush.h + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ +#ifdef __KERNEL__ +#ifndef _PPC_TLBFLUSH_H +#define _PPC_TLBFLUSH_H + +#include <linux/config.h> +#include <linux/mm.h> + +extern void _tlbie(unsigned long address); +extern void _tlbia(void); + +#if defined(CONFIG_4xx) + +#ifndef CONFIG_44x +#define __tlbia() asm volatile ("sync; tlbia; isync" : : : "memory") +#else +#define __tlbia _tlbia +#endif + +static inline void flush_tlb_mm(struct mm_struct *mm) + { __tlbia(); } +static inline void flush_tlb_page(struct vm_area_struct *vma, + unsigned long vmaddr) + { _tlbie(vmaddr); } +static inline void flush_tlb_page_nohash(struct vm_area_struct *vma, + unsigned long vmaddr) + { _tlbie(vmaddr); } +static inline void flush_tlb_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end) + { __tlbia(); } +static inline void flush_tlb_kernel_range(unsigned long start, + unsigned long end) + { __tlbia(); } + +#elif defined(CONFIG_FSL_BOOKE) + +/* TODO: determine if flush_tlb_range & flush_tlb_kernel_range + * are best implemented as tlbia vs specific tlbie's */ + +#define __tlbia() _tlbia() + +static inline void flush_tlb_mm(struct mm_struct *mm) + { __tlbia(); } +static inline void flush_tlb_page(struct vm_area_struct *vma, + unsigned long vmaddr) + { _tlbie(vmaddr); } +static inline void flush_tlb_page_nohash(struct vm_area_struct *vma, + unsigned long vmaddr) + { _tlbie(vmaddr); } +static inline void flush_tlb_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end) + { __tlbia(); } +static inline void flush_tlb_kernel_range(unsigned long start, + unsigned long end) + { __tlbia(); } + +#elif defined(CONFIG_8xx) +#define __tlbia() asm volatile ("tlbia; sync" : : : "memory") + +static inline void flush_tlb_mm(struct mm_struct *mm) + { __tlbia(); } +static inline void flush_tlb_page(struct vm_area_struct *vma, + unsigned long vmaddr) + { _tlbie(vmaddr); } +static inline void flush_tlb_page_nohash(struct vm_area_struct *vma, + unsigned long vmaddr) + { _tlbie(vmaddr); } +static inline void flush_tlb_range(struct mm_struct *mm, + unsigned long start, unsigned long end) + { __tlbia(); } +static inline void flush_tlb_kernel_range(unsigned long start, + unsigned long end) + { __tlbia(); } + +#else /* 6xx, 7xx, 7xxx cpus */ +struct mm_struct; +struct vm_area_struct; +extern void flush_tlb_mm(struct mm_struct *mm); +extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr); +extern void flush_tlb_page_nohash(struct vm_area_struct *vma, unsigned long addr); +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 + +/* + * This is called in munmap when we have freed up some page-table + * pages. We don't need to do anything here, there's nothing special + * about our page-table pages. -- paulus + */ +static inline void flush_tlb_pgtables(struct mm_struct *mm, + unsigned long start, unsigned long end) +{ +} + +/* + * This gets called at the end of handling a page fault, when + * the kernel has put a new PTE into the page table for the process. + * We use it to ensure coherency between the i-cache and d-cache + * for the page which has just been mapped in. + * On machines which use an MMU hash table, we use this to put a + * corresponding HPTE into the hash table ahead of time, instead of + * waiting for the inevitable extra hash-table miss exception. + */ +extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t); + +#endif /* _PPC_TLBFLUSH_H */ +#endif /*__KERNEL__ */ |