#ifndef _ASM_POWERPC_TLBFLUSH_H
#define _ASM_POWERPC_TLBFLUSH_H
/*
* TLB flushing:
*
* - flush_tlb_mm(mm) flushes the specified mm context TLB's
* - flush_tlb_page(vma, vmaddr) flushes one page
* - flush_tlb_page_nohash(vma, vmaddr) flushes one page if SW loaded TLB
* - flush_tlb_range(vma, start, end) flushes a range of pages
* - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
* - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
*
* 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__
struct mm_struct;
struct vm_area_struct;
#if defined(CONFIG_4xx) || defined(CONFIG_8xx) || defined(CONFIG_FSL_BOOKE)
/*
* TLB flushing for software loaded TLB chips
*
* TODO: (CONFIG_FSL_BOOKE) determine if flush_tlb_range &
* flush_tlb_kernel_range are best implemented as tlbia vs
* specific tlbie's
*/
extern void _tlbie(unsigned long address);
#if defined(CONFIG_40x) || defined(CONFIG_8xx)
#define _tlbia() asm volatile ("tlbia; sync" : : : "memory")
#else /* CONFIG_44x || CONFIG_FSL_BOOKE */
extern void _tlbia(void);
#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_PPC32)
/*
* TLB flushing for "classic" hash-MMMU 32-bit CPUs, 6xx, 7xx, 7xxx
*/
extern void _tlbie(unsigned long address);
extern void _tlbia(void);
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);
#else
/*
* TLB flushing for 64-bit has-MMU CPUs
*/
#include <linux/percpu.h>
#include <asm/page.h>
#define PPC64_TLB_BATCH_NR 192
struct ppc64_tlb_batch {
int active;
unsigned long index;
struct mm_struct *mm;
real_pte_t pte[PPC64_TLB_BATCH_NR];
unsigned long vaddr[PPC64_TLB_BATCH_NR];
unsigned int psize;
};
DECLARE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch);
extern void __flush_tlb_pending(struct ppc64_tlb_batch *batch);
extern void hpte_need_flush(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, unsigned long pte, int huge);
#define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
static inline void arch_enter_lazy_mmu_mode(void)
{
struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
batch->active = 1;
}
static inline void arch_leave_lazy_mmu_mode(void)
{
struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
if (batch->index)
__flush_tlb_pending(batch);
batch->active = 0;
}
#define arch_flush_lazy_mmu_mode() do {} while (0)
extern void flush_hash_page(unsigned long va, real_pte_t pte, int psize,
int local);
extern void flush_hash_range(unsigned long number, int local);
static inline void flush_tlb_mm(struct mm_struct *mm)
{
}
static inline void flush_tlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
{
}
static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
unsigned long vmaddr)
{
}
static inline void flush_tlb_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
}
static inline void flush_tlb_kernel_range(unsigned long start,
unsigned long end)
{
}
#endif
/*
* 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);
/*
* 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)
{
}
#endif /*__KERNEL__ */
#endif /* _ASM_POWERPC_TLBFLUSH_H */
