diff options
Diffstat (limited to 'include/asm-alpha/pgalloc.h')
| -rw-r--r-- | include/asm-alpha/pgalloc.h | 224 |
1 files changed, 2 insertions, 222 deletions
diff --git a/include/asm-alpha/pgalloc.h b/include/asm-alpha/pgalloc.h index 0fbeaa56610d..445dc28b827a 100644 --- a/include/asm-alpha/pgalloc.h +++ b/include/asm-alpha/pgalloc.h @@ -3,228 +3,6 @@ #include <linux/config.h> -#ifndef __EXTERN_INLINE -#define __EXTERN_INLINE extern inline -#define __MMU_EXTERN_INLINE -#endif - -extern void __load_new_mm_context(struct mm_struct *); - - -/* Caches aren't brain-dead on the Alpha. */ -#define flush_cache_all() do { } while (0) -#define flush_cache_mm(mm) do { } while (0) -#define flush_cache_range(vma, start, end) do { } while (0) -#define flush_cache_page(vma, vmaddr) do { } while (0) -#define flush_page_to_ram(page) do { } while (0) -#define flush_dcache_page(page) do { } while (0) - -/* Note that the following two definitions are _highly_ dependent - on the contexts in which they are used in the kernel. I personally - think it is criminal how loosely defined these macros are. */ - -/* We need to flush the kernel's icache after loading modules. The - only other use of this macro is in load_aout_interp which is not - used on Alpha. - - Note that this definition should *not* be used for userspace - icache flushing. While functional, it is _way_ overkill. The - icache is tagged with ASNs and it suffices to allocate a new ASN - for the process. */ -#ifndef CONFIG_SMP -#define flush_icache_range(start, end) imb() -#else -#define flush_icache_range(start, end) smp_imb() -extern void smp_imb(void); -#endif - - -/* - * Use a few helper functions to hide the ugly broken ASN - * numbers on early Alphas (ev4 and ev45) - */ - -__EXTERN_INLINE void -ev4_flush_tlb_current(struct mm_struct *mm) -{ - __load_new_mm_context(mm); - tbiap(); -} - -__EXTERN_INLINE void -ev5_flush_tlb_current(struct mm_struct *mm) -{ - __load_new_mm_context(mm); -} - -static inline void -flush_tlb_other(struct mm_struct *mm) -{ - long * mmc = &mm->context[smp_processor_id()]; - /* - * Check it's not zero first to avoid cacheline ping pong when - * possible. - */ - if (*mmc) - *mmc = 0; -} - -/* We need to flush the userspace icache after setting breakpoints in - ptrace. - - Instead of indiscriminately using imb, take advantage of the fact - that icache entries are tagged with the ASN and load a new mm context. */ -/* ??? Ought to use this in arch/alpha/kernel/signal.c too. */ - -#ifndef CONFIG_SMP -static inline void -flush_icache_user_range(struct vm_area_struct *vma, struct page *page, - unsigned long addr, int len) -{ - if (vma->vm_flags & VM_EXEC) { - struct mm_struct *mm = vma->vm_mm; - if (current->active_mm == mm) - __load_new_mm_context(mm); - else - mm->context[smp_processor_id()] = 0; - } -} -#else -extern void flush_icache_user_range(struct vm_area_struct *vma, - struct page *page, unsigned long addr, int len); -#endif - -/* this is used only in do_no_page and do_swap_page */ -#define flush_icache_page(vma, page) flush_icache_user_range((vma), (page), 0, 0) - -/* - * Flush just one page in the current TLB set. - * We need to be very careful about the icache here, there - * is no way to invalidate a specific icache page.. - */ - -__EXTERN_INLINE void -ev4_flush_tlb_current_page(struct mm_struct * mm, - struct vm_area_struct *vma, - unsigned long addr) -{ - int tbi_flag = 2; - if (vma->vm_flags & VM_EXEC) { - __load_new_mm_context(mm); - tbi_flag = 3; - } - tbi(tbi_flag, addr); -} - -__EXTERN_INLINE void -ev5_flush_tlb_current_page(struct mm_struct * mm, - struct vm_area_struct *vma, - unsigned long addr) -{ - if (vma->vm_flags & VM_EXEC) - __load_new_mm_context(mm); - else - tbi(2, addr); -} - - -#ifdef CONFIG_ALPHA_GENERIC -# define flush_tlb_current alpha_mv.mv_flush_tlb_current -# define flush_tlb_current_page alpha_mv.mv_flush_tlb_current_page -#else -# ifdef CONFIG_ALPHA_EV4 -# define flush_tlb_current ev4_flush_tlb_current -# define flush_tlb_current_page ev4_flush_tlb_current_page -# else -# define flush_tlb_current ev5_flush_tlb_current -# define flush_tlb_current_page ev5_flush_tlb_current_page -# endif -#endif - -#ifdef __MMU_EXTERN_INLINE -#undef __EXTERN_INLINE -#undef __MMU_EXTERN_INLINE -#endif - -/* - * Flush current user mapping. - */ -static inline void flush_tlb(void) -{ - flush_tlb_current(current->active_mm); -} - -/* - * Flush a specified range of user mapping page tables - * from TLB. - * Although Alpha uses VPTE caches, this can be a nop, as Alpha does - * not have finegrained tlb flushing, so it will flush VPTE stuff - * during next flush_tlb_range. - */ -static inline void flush_tlb_pgtables(struct mm_struct *mm, - unsigned long start, unsigned long end) -{ -} - -#ifndef CONFIG_SMP -/* - * Flush everything (kernel mapping may also have - * changed due to vmalloc/vfree) - */ -static inline void flush_tlb_all(void) -{ - tbia(); -} - -/* - * Flush a specified user mapping - */ -static inline void flush_tlb_mm(struct mm_struct *mm) -{ - if (mm == current->active_mm) - flush_tlb_current(mm); - else - flush_tlb_other(mm); -} - -/* - * Page-granular tlb flush. - * - * do a tbisd (type = 2) normally, and a tbis (type = 3) - * if it is an executable mapping. We want to avoid the - * itlb flush, because that potentially also does a - * icache flush. - */ -static inline void flush_tlb_page(struct vm_area_struct *vma, - unsigned long addr) -{ - struct mm_struct * mm = vma->vm_mm; - - if (mm == current->active_mm) - flush_tlb_current_page(mm, vma, addr); - else - flush_tlb_other(mm); -} - -/* - * Flush a specified range of user mapping: on the - * Alpha we flush the whole user tlb. - */ -static inline void flush_tlb_range(struct vm_area_struct *vma, - unsigned long start, unsigned long end) -{ - flush_tlb_mm(vma->vm_mm); -} - -#else /* CONFIG_SMP */ - -extern void flush_tlb_all(void); -extern void flush_tlb_mm(struct mm_struct *); -extern void flush_tlb_page(struct vm_area_struct *, unsigned long); -extern void flush_tlb_range(struct vm_area_struct *, unsigned long, unsigned long); - -#endif /* CONFIG_SMP */ - /* * Allocate and free page tables. The xxx_kernel() versions are * used to allocate a kernel page table - this turns on ASN bits @@ -292,4 +70,6 @@ pte_free(struct page *page) __free_page(page); } +#define check_pgt_cache() do { } while (0) + #endif /* _ALPHA_PGALLOC_H */ |