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11/17/2022 06:42:16 AM
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Kbuild
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tlbflush.h
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Editing: tlbflush.h
Close
/* MN10300 TLB flushing functions * * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public Licence * as published by the Free Software Foundation; either version * 2 of the Licence, or (at your option) any later version. */ #ifndef _ASM_TLBFLUSH_H #define _ASM_TLBFLUSH_H #include <linux/mm.h> #include <asm/processor.h> struct tlb_state { struct mm_struct *active_mm; int state; }; DECLARE_PER_CPU_SHARED_ALIGNED(struct tlb_state, cpu_tlbstate); /** * local_flush_tlb - Flush the current MM's entries from the local CPU's TLBs */ static inline void local_flush_tlb(void) { int w; asm volatile( " mov %1,%0 \n" " or %2,%0 \n" " mov %0,%1 \n" : "=d"(w) : "m"(MMUCTR), "i"(MMUCTR_IIV|MMUCTR_DIV) : "cc", "memory"); } /** * local_flush_tlb_all - Flush all entries from the local CPU's TLBs */ static inline void local_flush_tlb_all(void) { local_flush_tlb(); } /** * local_flush_tlb_one - Flush one entry from the local CPU's TLBs */ static inline void local_flush_tlb_one(unsigned long addr) { local_flush_tlb(); } /** * local_flush_tlb_page - Flush a page's entry from the local CPU's TLBs * @mm: The MM to flush for * @addr: The address of the target page in RAM (not its page struct) */ static inline void local_flush_tlb_page(struct mm_struct *mm, unsigned long addr) { unsigned long pteu, flags, cnx; addr &= PAGE_MASK; local_irq_save(flags); cnx = 1; #ifdef CONFIG_MN10300_TLB_USE_PIDR cnx = mm->context.tlbpid[smp_processor_id()]; #endif if (cnx) { pteu = addr; #ifdef CONFIG_MN10300_TLB_USE_PIDR pteu |= cnx & xPTEU_PID; #endif IPTEU = pteu; DPTEU = pteu; if (IPTEL & xPTEL_V) IPTEL = 0; if (DPTEL & xPTEL_V) DPTEL = 0; } local_irq_restore(flags); } /* * TLB flushing: * * - flush_tlb() flushes the current mm struct TLBs * - 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 * - flush_tlb_pgtables(mm, start, end) flushes a range of page tables */ #ifdef CONFIG_SMP #include <asm/smp.h> extern void flush_tlb_all(void); extern void flush_tlb_current_task(void); extern void flush_tlb_mm(struct mm_struct *); extern void flush_tlb_page(struct vm_area_struct *, unsigned long); #define flush_tlb() flush_tlb_current_task() static inline void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) { flush_tlb_mm(vma->vm_mm); } #else /* CONFIG_SMP */ static inline void flush_tlb_all(void) { preempt_disable(); local_flush_tlb_all(); preempt_enable(); } static inline void flush_tlb_mm(struct mm_struct *mm) { preempt_disable(); local_flush_tlb_all(); preempt_enable(); } static inline void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) { preempt_disable(); local_flush_tlb_all(); preempt_enable(); } #define flush_tlb_page(vma, addr) local_flush_tlb_page((vma)->vm_mm, addr) #define flush_tlb() flush_tlb_all() #endif /* CONFIG_SMP */ static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end) { flush_tlb_all(); } static inline void flush_tlb_pgtables(struct mm_struct *mm, unsigned long start, unsigned long end) { } #endif /* _ASM_TLBFLUSH_H */