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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* linux/arch/arm/mm/tlbv4.S
*
* Copyright (C) 1997-2002 Russell King
*
* ARM architecture version 4 TLB handling functions.
* These assume a split I/D TLBs, and no write buffer.
*
* Processors: ARM720T
*/
#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"
.align 5
/*
* v4_flush_user_tlb_range(start, end, mm)
*
* Invalidate a range of TLB entries in the specified user address space.
*
* - start - range start address
* - end - range end address
* - mm - mm_struct describing address space
*/
.align 5
SYM_TYPED_FUNC_START(v4_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
.v4_flush_kern_tlb_range:
bic r0, r0, #0x0ff
bic r0, r0, #0xf00
1: mcr p15, 0, r0, c8, c7, 1 @ invalidate TLB entry
add r0, r0, #PAGE_SZ
cmp r0, r1
blo 1b
ret lr
SYM_FUNC_END(v4_flush_user_tlb_range)
/*
* v4_flush_kern_tlb_range(start, end)
*
* Invalidate a range of TLB entries in the specified kernel
* address range.
*
* - start - virtual address (may not be aligned)
* - end - virtual address (may not be aligned)
*/
#ifdef CONFIG_CFI_CLANG
SYM_TYPED_FUNC_START(v4_flush_kern_tlb_range)
b .v4_flush_kern_tlb_range
SYM_FUNC_END(v4_flush_kern_tlb_range)
#else
.globl v4_flush_kern_tlb_range
.equ v4_flush_kern_tlb_range, .v4_flush_kern_tlb_range
#endif
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