mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-01 14:44:12 +00:00
5673a60b80
1. These tlb flush functions have been using vma instead mm long time ago, but there is still some comments use mm as parameter. 2. the actual struct we use is vm_area_struct instead of vma_struct. 3. remove unused flush_kern_tlb_page. Link: https://lkml.kernel.org/r/87k0oaq311.wl-chenli@uniontech.com Signed-off-by: Chen Li <chenli@uniontech.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Jonas Bonn <jonas@southpole.se> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
90 lines
2.5 KiB
ArmAsm
90 lines
2.5 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* linux/arch/arm/mm/tlb-v6.S
|
|
*
|
|
* Copyright (C) 1997-2002 Russell King
|
|
*
|
|
* ARM architecture version 6 TLB handling functions.
|
|
* These assume a split I/D TLB.
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/linkage.h>
|
|
#include <asm/asm-offsets.h>
|
|
#include <asm/assembler.h>
|
|
#include <asm/page.h>
|
|
#include <asm/tlbflush.h>
|
|
#include "proc-macros.S"
|
|
|
|
#define HARVARD_TLB
|
|
|
|
/*
|
|
* v6wbi_flush_user_tlb_range(start, end, vma)
|
|
*
|
|
* Invalidate a range of TLB entries in the specified address space.
|
|
*
|
|
* - start - start address (may not be aligned)
|
|
* - end - end address (exclusive, may not be aligned)
|
|
* - vma - vm_area_struct describing address range
|
|
*
|
|
* It is assumed that:
|
|
* - the "Invalidate single entry" instruction will invalidate
|
|
* both the I and the D TLBs on Harvard-style TLBs
|
|
*/
|
|
ENTRY(v6wbi_flush_user_tlb_range)
|
|
vma_vm_mm r3, r2 @ get vma->vm_mm
|
|
mov ip, #0
|
|
mmid r3, r3 @ get vm_mm->context.id
|
|
mcr p15, 0, ip, c7, c10, 4 @ drain write buffer
|
|
mov r0, r0, lsr #PAGE_SHIFT @ align address
|
|
mov r1, r1, lsr #PAGE_SHIFT
|
|
asid r3, r3 @ mask ASID
|
|
orr r0, r3, r0, lsl #PAGE_SHIFT @ Create initial MVA
|
|
mov r1, r1, lsl #PAGE_SHIFT
|
|
vma_vm_flags r2, r2 @ get vma->vm_flags
|
|
1:
|
|
#ifdef HARVARD_TLB
|
|
mcr p15, 0, r0, c8, c6, 1 @ TLB invalidate D MVA (was 1)
|
|
tst r2, #VM_EXEC @ Executable area ?
|
|
mcrne p15, 0, r0, c8, c5, 1 @ TLB invalidate I MVA (was 1)
|
|
#else
|
|
mcr p15, 0, r0, c8, c7, 1 @ TLB invalidate MVA (was 1)
|
|
#endif
|
|
add r0, r0, #PAGE_SZ
|
|
cmp r0, r1
|
|
blo 1b
|
|
mcr p15, 0, ip, c7, c10, 4 @ data synchronization barrier
|
|
ret lr
|
|
|
|
/*
|
|
* v6wbi_flush_kern_tlb_range(start,end)
|
|
*
|
|
* Invalidate a range of kernel TLB entries
|
|
*
|
|
* - start - start address (may not be aligned)
|
|
* - end - end address (exclusive, may not be aligned)
|
|
*/
|
|
ENTRY(v6wbi_flush_kern_tlb_range)
|
|
mov r2, #0
|
|
mcr p15, 0, r2, c7, c10, 4 @ drain write buffer
|
|
mov r0, r0, lsr #PAGE_SHIFT @ align address
|
|
mov r1, r1, lsr #PAGE_SHIFT
|
|
mov r0, r0, lsl #PAGE_SHIFT
|
|
mov r1, r1, lsl #PAGE_SHIFT
|
|
1:
|
|
#ifdef HARVARD_TLB
|
|
mcr p15, 0, r0, c8, c6, 1 @ TLB invalidate D MVA
|
|
mcr p15, 0, r0, c8, c5, 1 @ TLB invalidate I MVA
|
|
#else
|
|
mcr p15, 0, r0, c8, c7, 1 @ TLB invalidate MVA
|
|
#endif
|
|
add r0, r0, #PAGE_SZ
|
|
cmp r0, r1
|
|
blo 1b
|
|
mcr p15, 0, r2, c7, c10, 4 @ data synchronization barrier
|
|
mcr p15, 0, r2, c7, c5, 4 @ prefetch flush (isb)
|
|
ret lr
|
|
|
|
__INIT
|
|
|
|
/* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */
|
|
define_tlb_functions v6wbi, v6wbi_tlb_flags
|