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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* linux/arch/arm/mm/tlbv4wbi.S
*
* Copyright (C) 1997-2002 Russell King
*
* ARM architecture version 4 and version 5 TLB handling functions.
* These assume a split I/D TLBs, with a write buffer.
*
* Processors: ARM920 ARM922 ARM925 ARM926 XScale
*/
#include <linux/linkage.h>
#include <linux/init.h>
#include <linux/cfi_types.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
#include <asm/tlbflush.h>
#include "proc-macros.S"
/*
* v4wb_flush_user_tlb_range(start, end, mm)
*
* Invalidate a range of TLB entries in the specified address space.
*
* - start - range start address
* - end - range end address
* - mm - mm_struct describing address space
*/
.align 5
SYM_TYPED_FUNC_START(v4wbi_flush_user_tlb_range)
vma_vm_mm ip, r2
act_mm r3 @ get current->active_mm
eors r3, ip, r3 @ == mm ?
retne lr @ no, we dont do anything
mov r3, #0
mcr p15, 0, r3, c7, c10, 4 @ drain WB
vma_vm_flags r2, r2
bic r0, r0, #0x0ff
bic r0, r0, #0xf00
1: tst r2, #VM_EXEC
mcrne p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry
mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry
add r0, r0, #PAGE_SZ
cmp r0, r1
blo 1b
ret lr
SYM_FUNC_END(v4wbi_flush_user_tlb_range)
SYM_TYPED_FUNC_START(v4wbi_flush_kern_tlb_range)
mov r3, #0
mcr p15, 0, r3, c7, c10, 4 @ drain WB
bic r0, r0, #0x0ff
bic r0, r0, #0xf00
1: mcr p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry
mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry
add r0, r0, #PAGE_SZ
cmp r0, r1
blo 1b
ret lr
SYM_FUNC_END(v4wbi_flush_kern_tlb_range)
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