1/* 2 * linux/arch/arm/mm/tlbv4wbi.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 and version 5 TLB handling functions. 11 * These assume a split I/D TLBs, with a write buffer. 12 * 13 * Processors: ARM920 ARM922 ARM925 ARM926 XScale 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/* 23 * v4wb_flush_user_tlb_range(start, end, mm) 24 * 25 * Invalidate a range of TLB entries in the specified 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(v4wbi_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 retne lr @ no, we dont do anything 37 mov r3, #0 38 mcr p15, 0, r3, c7, c10, 4 @ drain WB 39 vma_vm_flags r2, r2 40 bic r0, r0, #0x0ff 41 bic r0, r0, #0xf00 421: tst r2, #VM_EXEC 43 mcrne p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry 44 mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry 45 add r0, r0, #PAGE_SZ 46 cmp r0, r1 47 blo 1b 48 ret lr 49 50ENTRY(v4wbi_flush_kern_tlb_range) 51 mov r3, #0 52 mcr p15, 0, r3, c7, c10, 4 @ drain WB 53 bic r0, r0, #0x0ff 54 bic r0, r0, #0xf00 551: mcr p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry 56 mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry 57 add r0, r0, #PAGE_SZ 58 cmp r0, r1 59 blo 1b 60 ret lr 61 62 __INITDATA 63 64 /* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */ 65 define_tlb_functions v4wbi, v4wbi_tlb_flags 66