1/* 2 * linux/arch/arm/mm/tlbv4wb.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 w/o I TLB entry, with a write buffer. 12 * 13 * Processors: SA110 SA1100 SA1110 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 * 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(v4wb_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 vma_vm_flags r2, r2 38 mcr p15, 0, r3, c7, c10, 4 @ drain WB 39 tst r2, #VM_EXEC 40 mcrne p15, 0, r3, c8, c5, 0 @ invalidate I TLB 41 bic r0, r0, #0x0ff 42 bic r0, r0, #0xf00 431: 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 49/* 50 * v4_flush_kern_tlb_range(start, end) 51 * 52 * Invalidate a range of TLB entries in the specified kernel 53 * address range. 54 * 55 * - start - virtual address (may not be aligned) 56 * - end - virtual address (may not be aligned) 57 */ 58ENTRY(v4wb_flush_kern_tlb_range) 59 mov r3, #0 60 mcr p15, 0, r3, c7, c10, 4 @ drain WB 61 bic r0, r0, #0x0ff 62 bic r0, r0, #0xf00 63 mcr p15, 0, r3, c8, c5, 0 @ invalidate I TLB 641: mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry 65 add r0, r0, #PAGE_SZ 66 cmp r0, r1 67 blo 1b 68 mov pc, lr 69 70 __INITDATA 71 72 /* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */ 73 define_tlb_functions v4wb, v4wb_tlb_flags 74