Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
61 lines
1.6 KiB
ArmAsm
61 lines
1.6 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* linux/arch/arm/mm/tlbv4wbi.S
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*
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* Copyright (C) 1997-2002 Russell King
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*
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* ARM architecture version 4 and version 5 TLB handling functions.
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* These assume a split I/D TLBs, with a write buffer.
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*
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* Processors: ARM920 ARM922 ARM925 ARM926 XScale
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*/
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#include <linux/linkage.h>
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#include <linux/init.h>
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#include <linux/cfi_types.h>
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#include <asm/assembler.h>
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#include <asm/asm-offsets.h>
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#include <asm/tlbflush.h>
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#include "proc-macros.S"
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/*
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* v4wb_flush_user_tlb_range(start, end, mm)
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*
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* Invalidate a range of TLB entries in the specified address space.
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*
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* - start - range start address
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* - end - range end address
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* - mm - mm_struct describing address space
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*/
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.align 5
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SYM_TYPED_FUNC_START(v4wbi_flush_user_tlb_range)
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vma_vm_mm ip, r2
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act_mm r3 @ get current->active_mm
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eors r3, ip, r3 @ == mm ?
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retne lr @ no, we dont do anything
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mov r3, #0
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mcr p15, 0, r3, c7, c10, 4 @ drain WB
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vma_vm_flags r2, r2
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bic r0, r0, #0x0ff
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bic r0, r0, #0xf00
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1: tst r2, #VM_EXEC
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mcrne p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry
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mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry
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add r0, r0, #PAGE_SZ
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cmp r0, r1
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blo 1b
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ret lr
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SYM_FUNC_END(v4wbi_flush_user_tlb_range)
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SYM_TYPED_FUNC_START(v4wbi_flush_kern_tlb_range)
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mov r3, #0
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mcr p15, 0, r3, c7, c10, 4 @ drain WB
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bic r0, r0, #0x0ff
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bic r0, r0, #0xf00
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1: mcr p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry
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mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry
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add r0, r0, #PAGE_SZ
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cmp r0, r1
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blo 1b
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ret lr
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SYM_FUNC_END(v4wbi_flush_kern_tlb_range)
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