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/*
* linux/include/asm-arm/proc-armo/cache.h
*
* Copyright (C) 1999-2001 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Cache handling for 26-bit ARM processors.
*/
#define flush_cache_all() do { } while (0)
#define flush_cache_mm(mm) do { } while (0)
#define flush_cache_range(mm,start,end) do { } while (0)
#define flush_cache_page(vma,vmaddr) do { } while (0)
#define flush_page_to_ram(page) do { } while (0)
#define invalidate_dcache_range(start,end) do { } while (0)
#define clean_dcache_range(start,end) do { } while (0)
#define flush_dcache_range(start,end) do { } while (0)
#define flush_dcache_page(page) do { } while (0)
#define clean_dcache_entry(_s) do { } while (0)
#define clean_cache_entry(_start) do { } while (0)
#define flush_icache_range(start,end) do { } while (0)
#define flush_icache_page(vma,page) do { } while (0)
/* DAG: ARM3 will flush cache on MEMC updates anyway? so don't bother */
#define clean_cache_area(_start,_size) do { } while (0)
/*
* TLB flushing:
*
* - flush_tlb_all() flushes all processes TLBs
* - flush_tlb_mm(mm) flushes the specified mm context TLB's
* - flush_tlb_page(vma, vmaddr) flushes one page
* - flush_tlb_range(mm, start, end) flushes a range of pages
*/
#define flush_tlb_all() memc_update_all()
#define flush_tlb_mm(mm) memc_update_mm(mm)
#define flush_tlb_range(mm,start,end) \
do { memc_update_mm(mm); (void)(start); (void)(end); } while (0)
#define flush_tlb_page(vma, vmaddr) do { } while (0)
/*
* The following handle the weird MEMC chip
*/
static inline void memc_update_all(void)
{
struct task_struct *p;
cpu_memc_update_all(init_mm.pgd);
for_each_task(p) {
if (!p->mm)
continue;
cpu_memc_update_all(p->mm->pgd);
}
processor._set_pgd(current->active_mm->pgd);
}
static inline void memc_update_mm(struct mm_struct *mm)
{
cpu_memc_update_all(mm->pgd);
if (mm == current->active_mm)
processor._set_pgd(mm->pgd);
}
static inline void
memc_clear(struct mm_struct *mm, struct page *page)
{
cpu_memc_update_entry(mm->pgd, (unsigned long) page_address(page), 0);
if (mm == current->active_mm)
processor._set_pgd(mm->pgd);
}
static inline void
memc_update_addr(struct mm_struct *mm, pte_t pte, unsigned long vaddr)
{
cpu_memc_update_entry(mm->pgd, pte_val(pte), vaddr);
if (mm == current->active_mm)
processor._set_pgd(mm->pgd);
}
static inline void
update_mmu_cache(struct vm_area_struct *vma, unsigned long addr, pte_t pte)
{
struct mm_struct *mm = vma->vm_mm;
memc_update_addr(mm, pte, addr);
}
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