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/asm-offsets.h> 18#include <asm/tlbflush.h> 19#include "proc-macros.S" 20 21 .align 5 22/* 23 * v4_flush_user_tlb_range(start, end, mm) 24 * 25 * Invalidate a range of TLB entries in the specified user address space. 26 * 27 * - start - range start address 28 * - end - range end address 29 * - mm - mm_struct describing address space 30 */ 31 .align 5 32ENTRY(v4_flush_user_tlb_range) 33 vma_vm_mm ip, r2 34 act_mm r3 @ get current->active_mm 35 eors r3, ip, r3 @ == mm ? 36 movne pc, lr @ no, we dont do anything 37.v4_flush_kern_tlb_range: 38 bic r0, r0, #0x0ff 39 bic r0, r0, #0xf00 401: mcr p15, 0, r0, c8, c7, 1 @ invalidate TLB entry 41 add r0, r0, #PAGE_SZ 42 cmp r0, r1 43 blo 1b 44 mov pc, lr 45 46/* 47 * v4_flush_kern_tlb_range(start, end) 48 * 49 * Invalidate a range of TLB entries in the specified kernel 50 * address range. 51 * 52 * - start - virtual address (may not be aligned) 53 * - end - virtual address (may not be aligned) 54 */ 55.globl v4_flush_kern_tlb_range 56.equ v4_flush_kern_tlb_range, .v4_flush_kern_tlb_range 57 58 __INITDATA 59 60 /* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */ 61 define_tlb_functions v4, v4_tlb_flags 62