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CONFIG_PPC_STD_MMU_64 indicates support for the "standard" powerpc MMU on 64-bit CPUs. The "standard" MMU refers to the hash page table MMU found in "server" processors, from IBM mainly. Currently CONFIG_PPC_STD_MMU_64 is == CONFIG_PPC_BOOK3S_64. While it's annoying to have two symbols that always have the same value, it's not quite annoying enough to bother removing one. However with the arrival of Power9, we now have the situation where CONFIG_PPC_STD_MMU_64 is enabled, but the kernel is running using the Radix MMU - *not* the "standard" MMU. So it is now actively confusing to use it, because it implies that code is disabled or inactive when the Radix MMU is in use, however that is not necessarily true. So s/CONFIG_PPC_STD_MMU_64/CONFIG_PPC_BOOK3S_64/, and do some minor formatting updates of some of the affected lines. This will be a pain for backports, but c'est la vie. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
87 lines
2.9 KiB
C
87 lines
2.9 KiB
C
#ifndef _ASM_POWERPC_TLBFLUSH_H
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#define _ASM_POWERPC_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_page_nohash(vma, vmaddr) flushes one page if SW loaded TLB
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifdef __KERNEL__
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#ifdef CONFIG_PPC_MMU_NOHASH
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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_FSL_BOOKE) 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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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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#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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#elif defined(CONFIG_PPC_STD_MMU_32)
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#define MMU_NO_CONTEXT (0)
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/*
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* TLB flushing for "classic" hash-MMU 32-bit CPUs, 6xx, 7xx, 7xxx
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*/
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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_nohash(struct vm_area_struct *vma, unsigned long addr);
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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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extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
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static inline void local_flush_tlb_page(struct vm_area_struct *vma,
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unsigned long vmaddr)
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{
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flush_tlb_page(vma, vmaddr);
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}
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static inline void local_flush_tlb_mm(struct mm_struct *mm)
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{
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flush_tlb_mm(mm);
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}
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#elif defined(CONFIG_PPC_BOOK3S_64)
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#include <asm/book3s/64/tlbflush.h>
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#else
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#error Unsupported MMU type
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#endif
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#endif /*__KERNEL__ */
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#endif /* _ASM_POWERPC_TLBFLUSH_H */
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