diff options
Diffstat (limited to 'kernel/arch/ia64/include/asm/tlbflush.h')
-rw-r--r-- | kernel/arch/ia64/include/asm/tlbflush.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/kernel/arch/ia64/include/asm/tlbflush.h b/kernel/arch/ia64/include/asm/tlbflush.h new file mode 100644 index 000000000..3be25dfed --- /dev/null +++ b/kernel/arch/ia64/include/asm/tlbflush.h @@ -0,0 +1,102 @@ +#ifndef _ASM_IA64_TLBFLUSH_H +#define _ASM_IA64_TLBFLUSH_H + +/* + * Copyright (C) 2002 Hewlett-Packard Co + * David Mosberger-Tang <davidm@hpl.hp.com> + */ + + +#include <linux/mm.h> + +#include <asm/intrinsics.h> +#include <asm/mmu_context.h> +#include <asm/page.h> + +/* + * Now for some TLB flushing routines. This is the kind of stuff that + * can be very expensive, so try to avoid them whenever possible. + */ +extern void setup_ptcg_sem(int max_purges, int from_palo); + +/* + * Flush everything (kernel mapping may also have changed due to + * vmalloc/vfree). + */ +extern void local_flush_tlb_all (void); + +#ifdef CONFIG_SMP + extern void smp_flush_tlb_all (void); + extern void smp_flush_tlb_mm (struct mm_struct *mm); + extern void smp_flush_tlb_cpumask (cpumask_t xcpumask); +# define flush_tlb_all() smp_flush_tlb_all() +#else +# define flush_tlb_all() local_flush_tlb_all() +# define smp_flush_tlb_cpumask(m) local_flush_tlb_all() +#endif + +static inline void +local_finish_flush_tlb_mm (struct mm_struct *mm) +{ + if (mm == current->active_mm) + activate_context(mm); +} + +/* + * Flush a specified user mapping. This is called, e.g., as a result of fork() and + * exit(). fork() ends up here because the copy-on-write mechanism needs to write-protect + * the PTEs of the parent task. + */ +static inline void +flush_tlb_mm (struct mm_struct *mm) +{ + if (!mm) + return; + + set_bit(mm->context, ia64_ctx.flushmap); + mm->context = 0; + + if (atomic_read(&mm->mm_users) == 0) + return; /* happens as a result of exit_mmap() */ + +#ifdef CONFIG_SMP + smp_flush_tlb_mm(mm); +#else + local_finish_flush_tlb_mm(mm); +#endif +} + +extern void flush_tlb_range (struct vm_area_struct *vma, unsigned long start, unsigned long end); + +/* + * Page-granular tlb flush. + */ +static inline void +flush_tlb_page (struct vm_area_struct *vma, unsigned long addr) +{ +#ifdef CONFIG_SMP + flush_tlb_range(vma, (addr & PAGE_MASK), (addr & PAGE_MASK) + PAGE_SIZE); +#else + if (vma->vm_mm == current->active_mm) + ia64_ptcl(addr, (PAGE_SHIFT << 2)); + else + vma->vm_mm->context = 0; +#endif +} + +/* + * Flush the local TLB. Invoked from another cpu using an IPI. + */ +#ifdef CONFIG_SMP +void smp_local_flush_tlb(void); +#else +#define smp_local_flush_tlb() +#endif + +static inline void flush_tlb_kernel_range(unsigned long start, + unsigned long end) +{ + flush_tlb_all(); /* XXX fix me */ +} + +#endif /* _ASM_IA64_TLBFLUSH_H */ |