unicore32: rewrite arch-specific tlb.h to use asm-generic version

#ifndef __UNICORE_TLB_H__

#define __UNICORE_TLB_H__

#include <asm/cacheflush.h>

#include <asm/tlbflush.h>

#include <asm/pgalloc.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		range_start;

	unsigned long		range_end;

};

DECLARE_PER_CPU(struct mmu_gather, mmu_gathers);

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;

	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);

}

/*

 * Memorize the range for the TLB flush.

 */

static inline void

tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep, unsigned long addr)

{

	if (!tlb->fullmm) {

		if (addr < tlb->range_start)

			tlb->range_start = addr;

		if (addr + PAGE_SIZE > tlb->range_end)

			tlb->range_end = addr + 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);

		tlb->range_start = TASK_SIZE;

		tlb->range_end = 0;

	}

}

static inline void

tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vma)

{

	if (!tlb->fullmm && tlb->range_end > 0)

		flush_tlb_range(vma, tlb->range_start, tlb->range_end);

}

#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, x, addr)      do { } while (0)

#define tlb_migrate_finish(mm)		do { } while (0)

#define tlb_start_vma(tlb, vma)				do { } while (0)

#define tlb_end_vma(tlb, vma)				do { } while (0)

#define __tlb_remove_tlb_entry(tlb, ptep, address)	do { } while (0)

#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)

#define __pte_free_tlb(tlb, pte, addr)				\

	do {							\

		pgtable_page_dtor(pte);				\

		tlb_remove_page((tlb), (pte));			\

	} while (0)

#include <asm-generic/tlb.h>

#endif