/* 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
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