112 lines
2.5 KiB
C
112 lines
2.5 KiB
C
#ifndef __ASM_SH_TLB_H
|
|
#define __ASM_SH_TLB_H
|
|
|
|
#ifdef CONFIG_SUPERH64
|
|
# include "tlb_64.h"
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <linux/pagemap.h>
|
|
|
|
#ifdef CONFIG_MMU
|
|
#include <asm/pgalloc.h>
|
|
#include <asm/tlbflush.h>
|
|
|
|
/*
|
|
* TLB handling. This allows us to remove pages from the page
|
|
* tables, and efficiently handle the TLB issues.
|
|
*/
|
|
struct mmu_gather {
|
|
struct mm_struct *mm;
|
|
unsigned int fullmm;
|
|
unsigned long start, end;
|
|
};
|
|
|
|
DECLARE_PER_CPU(struct mmu_gather, mmu_gathers);
|
|
|
|
static inline void init_tlb_gather(struct mmu_gather *tlb)
|
|
{
|
|
tlb->start = TASK_SIZE;
|
|
tlb->end = 0;
|
|
|
|
if (tlb->fullmm) {
|
|
tlb->start = 0;
|
|
tlb->end = TASK_SIZE;
|
|
}
|
|
}
|
|
|
|
static inline struct mmu_gather *
|
|
tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush)
|
|
{
|
|
struct mmu_gather *tlb = &get_cpu_var(mmu_gathers);
|
|
|
|
tlb->mm = mm;
|
|
tlb->fullmm = full_mm_flush;
|
|
|
|
init_tlb_gather(tlb);
|
|
|
|
return tlb;
|
|
}
|
|
|
|
static inline void
|
|
tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end)
|
|
{
|
|
if (tlb->fullmm)
|
|
flush_tlb_mm(tlb->mm);
|
|
|
|
/* keep the page table cache within bounds */
|
|
check_pgt_cache();
|
|
|
|
put_cpu_var(mmu_gathers);
|
|
}
|
|
|
|
static inline void
|
|
tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep, unsigned long address)
|
|
{
|
|
if (tlb->start > address)
|
|
tlb->start = address;
|
|
if (tlb->end < address + PAGE_SIZE)
|
|
tlb->end = address + PAGE_SIZE;
|
|
}
|
|
|
|
/*
|
|
* In the case of tlb vma handling, we can optimise these away in the
|
|
* case where we're doing a full MM flush. When we're doing a munmap,
|
|
* the vmas are adjusted to only cover the region to be torn down.
|
|
*/
|
|
static inline void
|
|
tlb_start_vma(struct mmu_gather *tlb, struct vm_area_struct *vma)
|
|
{
|
|
if (!tlb->fullmm)
|
|
flush_cache_range(vma, vma->vm_start, vma->vm_end);
|
|
}
|
|
|
|
static inline void
|
|
tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vma)
|
|
{
|
|
if (!tlb->fullmm && tlb->end) {
|
|
flush_tlb_range(vma, tlb->start, tlb->end);
|
|
init_tlb_gather(tlb);
|
|
}
|
|
}
|
|
|
|
#define tlb_remove_page(tlb,page) free_page_and_swap_cache(page)
|
|
#define pte_free_tlb(tlb, ptep, addr) pte_free((tlb)->mm, ptep)
|
|
#define pmd_free_tlb(tlb, pmdp, addr) pmd_free((tlb)->mm, pmdp)
|
|
#define pud_free_tlb(tlb, pudp, addr) pud_free((tlb)->mm, pudp)
|
|
|
|
#define tlb_migrate_finish(mm) do { } while (0)
|
|
|
|
#else /* CONFIG_MMU */
|
|
|
|
#define tlb_start_vma(tlb, vma) do { } while (0)
|
|
#define tlb_end_vma(tlb, vma) do { } while (0)
|
|
#define __tlb_remove_tlb_entry(tlb, pte, address) do { } while (0)
|
|
#define tlb_flush(tlb) do { } while (0)
|
|
|
|
#include <asm-generic/tlb.h>
|
|
|
|
#endif /* CONFIG_MMU */
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif /* __ASM_SH_TLB_H */
|