1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * linux/arch/arm/mm/tlbv4.S 4 * 5 * Copyright (C) 1997-2002 Russell King 6 * 7 * ARM architecture version 4 TLB handling functions. 8 * These assume a split I/D TLBs, and no write buffer. 9 * 10 * Processors: ARM720T 11 */ 12 #include <linux/linkage.h> 13 #include <linux/init.h> 14 #include <asm/assembler.h> 15 #include <asm/asm-offsets.h> 16 #include <asm/tlbflush.h> 17 #include "proc-macros.S" 18 19 .align 5 20 /* 21 * v4_flush_user_tlb_range(start, end, mm) 22 * 23 * Invalidate a range of TLB entries in the specified user address space. 24 * 25 * - start - range start address 26 * - end - range end address 27 * - mm - mm_struct describing address space 28 */ 29 .align 5 30 ENTRY(v4_flush_user_tlb_range) 31 vma_vm_mm ip, r2 32 act_mm r3 @ get current->active_mm 33 eors r3, ip, r3 @ == mm ? 34 retne lr @ no, we dont do anything 35 .v4_flush_kern_tlb_range: 36 bic r0, r0, #0x0ff 37 bic r0, r0, #0xf00 38 1: mcr p15, 0, r0, c8, c7, 1 @ invalidate TLB entry 39 add r0, r0, #PAGE_SZ 40 cmp r0, r1 41 blo 1b 42 ret lr 43 44 /* 45 * v4_flush_kern_tlb_range(start, end) 46 * 47 * Invalidate a range of TLB entries in the specified kernel 48 * address range. 49 * 50 * - start - virtual address (may not be aligned) 51 * - end - virtual address (may not be aligned) 52 */ 53 .globl v4_flush_kern_tlb_range 54 .equ v4_flush_kern_tlb_range, .v4_flush_kern_tlb_range 55 56 __INITDATA 57 58 /* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */ 59 define_tlb_functions v4, v4_tlb_flags 60