78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
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#ifndef __ASM_METAG_TLBFLUSH_H
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#define __ASM_METAG_TLBFLUSH_H
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#include <linux/io.h>
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#include <linux/sched.h>
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#include <asm/metag_mem.h>
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#include <asm/pgalloc.h>
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/*
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* TLB flushing:
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*
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* - flush_tlb() flushes the current mm struct TLBs
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* - flush_tlb_all() flushes all processes TLBs
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* - flush_tlb_mm(mm) flushes the specified mm context TLB's
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* - flush_tlb_page(vma, vmaddr) flushes one page
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* - flush_tlb_range(mm, start, end) flushes a range of pages
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* - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
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* - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
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*
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* FIXME: Meta 2 can flush single TLB entries.
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*
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*/
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#if defined(CONFIG_METAG_META21) && !defined(CONFIG_SMP)
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static inline void __flush_tlb(void)
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{
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/* flush TLB entries for just the current hardware thread */
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int thread = hard_processor_id();
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metag_out32(0, (LINSYSCFLUSH_TxMMCU_BASE +
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LINSYSCFLUSH_TxMMCU_STRIDE * thread));
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}
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#else
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static inline void __flush_tlb(void)
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{
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/* flush TLB entries for all hardware threads */
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metag_out32(0, LINSYSCFLUSH_MMCU);
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}
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#endif /* defined(CONFIG_METAG_META21) && !defined(CONFIG_SMP) */
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#define flush_tlb() __flush_tlb()
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#define flush_tlb_all() __flush_tlb()
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#define local_flush_tlb_all() __flush_tlb()
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static inline void flush_tlb_mm(struct mm_struct *mm)
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{
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if (mm == current->active_mm)
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__flush_tlb();
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}
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static inline void flush_tlb_page(struct vm_area_struct *vma,
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unsigned long addr)
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{
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flush_tlb_mm(vma->vm_mm);
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}
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static inline void flush_tlb_range(struct vm_area_struct *vma,
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unsigned long start, unsigned long end)
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{
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flush_tlb_mm(vma->vm_mm);
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}
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static inline void flush_tlb_pgtables(struct mm_struct *mm,
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unsigned long start, unsigned long end)
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{
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flush_tlb_mm(mm);
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}
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static inline void flush_tlb_kernel_range(unsigned long start,
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unsigned long end)
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{
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flush_tlb_all();
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}
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#endif /* __ASM_METAG_TLBFLUSH_H */
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