1/* 2 * linux/arch/arm/mm/tlbv4.S 3 * 4 * Copyright (C) 1997-2002 Russell King 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * ARM architecture version 4 TLB handling functions. 11 * These assume a split I/D TLBs, and no write buffer. 12 * 13 * Processors: ARM720T 14 */ 15#include <linux/linkage.h> 16#include <linux/init.h> 17#include <asm/assembler.h> 18#include <asm/asm-offsets.h> 19#include <asm/tlbflush.h> 20#include "proc-macros.S" 21 22 .align 5 23/* 24 * v4_flush_user_tlb_range(start, end, mm) 25 * 26 * Invalidate a range of TLB entries in the specified user address space. 27 * 28 * - start - range start address 29 * - end - range end address 30 * - mm - mm_struct describing address space 31 */ 32 .align 5 33ENTRY(v4_flush_user_tlb_range) 34 vma_vm_mm ip, r2 35 act_mm r3 @ get current->active_mm 36 eors r3, ip, r3 @ == mm ? 37 retne lr @ no, we dont do anything 38.v4_flush_kern_tlb_range: 39 bic r0, r0, #0x0ff 40 bic r0, r0, #0xf00 411: mcr p15, 0, r0, c8, c7, 1 @ invalidate TLB entry 42 add r0, r0, #PAGE_SZ 43 cmp r0, r1 44 blo 1b 45 ret lr 46 47/* 48 * v4_flush_kern_tlb_range(start, end) 49 * 50 * Invalidate a range of TLB entries in the specified kernel 51 * address range. 52 * 53 * - start - virtual address (may not be aligned) 54 * - end - virtual address (may not be aligned) 55 */ 56.globl v4_flush_kern_tlb_range 57.equ v4_flush_kern_tlb_range, .v4_flush_kern_tlb_range 58 59 __INITDATA 60 61 /* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */ 62 define_tlb_functions v4, v4_tlb_flags 63