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/asm-offsets.h> 18#include <asm/tlbflush.h> 19#include "proc-macros.S" 20 21/* 22 * v4wb_flush_user_tlb_range(start, end, mm) 23 * 24 * Invalidate a range of TLB entries in the specified address space. 25 * 26 * - start - range start address 27 * - end - range end address 28 * - mm - mm_struct describing address space 29 */ 30 .align 5 31ENTRY(v4wbi_flush_user_tlb_range) 32 vma_vm_mm ip, r2 33 act_mm r3 @ get current->active_mm 34 eors r3, ip, r3 @ == mm ? 35 movne pc, lr @ no, we dont do anything 36 mov r3, #0 37 mcr p15, 0, r3, c7, c10, 4 @ drain WB 38 vma_vm_flags r2, r2 39 bic r0, r0, #0x0ff 40 bic r0, r0, #0xf00 411: tst r2, #VM_EXEC 42 mcrne p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry 43 mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry 44 add r0, r0, #PAGE_SZ 45 cmp r0, r1 46 blo 1b 47 mov pc, lr 48 49ENTRY(v4wbi_flush_kern_tlb_range) 50 mov r3, #0 51 mcr p15, 0, r3, c7, c10, 4 @ drain WB 52 bic r0, r0, #0x0ff 53 bic r0, r0, #0xf00 541: mcr p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry 55 mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry 56 add r0, r0, #PAGE_SZ 57 cmp r0, r1 58 blo 1b 59 mov pc, lr 60 61 __INITDATA 62 63 /* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */ 64 define_tlb_functions v4wbi, v4wbi_tlb_flags 65