78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_NOHASH_TLBFLUSH_H
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#define _ASM_POWERPC_NOHASH_TLBFLUSH_H
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/*
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* TLB flushing:
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*
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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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* - local_flush_tlb_mm(mm, full) flushes the specified mm context on
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* the local processor
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* - local_flush_tlb_page(vma, vmaddr) flushes one page on the local processor
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* - flush_tlb_range(vma, 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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*
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*/
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/*
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* TLB flushing for software loaded TLB chips
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*
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* TODO: (CONFIG_PPC_85xx) determine if flush_tlb_range &
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* flush_tlb_kernel_range are best implemented as tlbia vs
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* specific tlbie's
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*/
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struct vm_area_struct;
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struct mm_struct;
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#define MMU_NO_CONTEXT ((unsigned int)-1)
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extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
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unsigned long end);
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#ifdef CONFIG_PPC_8xx
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static inline void local_flush_tlb_mm(struct mm_struct *mm)
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{
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unsigned int pid = READ_ONCE(mm->context.id);
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if (pid != MMU_NO_CONTEXT)
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asm volatile ("sync; tlbia; isync" : : : "memory");
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}
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static inline void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
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{
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asm volatile ("tlbie %0; sync" : : "r" (vmaddr) : "memory");
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}
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static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end)
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{
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start &= PAGE_MASK;
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if (end - start <= PAGE_SIZE)
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asm volatile ("tlbie %0; sync" : : "r" (start) : "memory");
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else
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asm volatile ("sync; tlbia; isync" : : : "memory");
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}
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#else
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extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
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extern void local_flush_tlb_mm(struct mm_struct *mm);
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extern void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
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extern void __local_flush_tlb_page(struct mm_struct *mm, unsigned long vmaddr,
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int tsize, int ind);
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#endif
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#ifdef CONFIG_SMP
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extern void flush_tlb_mm(struct mm_struct *mm);
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extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
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extern void __flush_tlb_page(struct mm_struct *mm, unsigned long vmaddr,
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int tsize, int ind);
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#else
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#define flush_tlb_mm(mm) local_flush_tlb_mm(mm)
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#define flush_tlb_page(vma,addr) local_flush_tlb_page(vma,addr)
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#define __flush_tlb_page(mm,addr,p,i) __local_flush_tlb_page(mm,addr,p,i)
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#endif
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#endif /* _ASM_POWERPC_NOHASH_TLBFLUSH_H */
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