1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * linux/arch/arm/mm/tlbv4.S 4 * 5 * Copyright (C) 1997-2002 Russell King 6 * 7 * ARM architecture version 4 TLB handling functions. 8 * These assume a split I/D TLBs, and no write buffer. 9 * 10 * Processors: ARM720T 11 */ 12 #include <linux/linkage.h> 13 #include <linux/init.h> 14 #include <linux/cfi_types.h> 15 #include <asm/assembler.h> 16 #include <asm/asm-offsets.h> 17 #include <asm/tlbflush.h> 18 #include "proc-macros.S" 19 20 .align 5 21 /* 22 * v4_flush_user_tlb_range(start, end, mm) 23 * 24 * Invalidate a range of TLB entries in the specified user address space. 25 * 26 * - start - range start address 27 * - end - range end address 28 * - mm - mm_struct describing address space 29 */ 30 .align 5 31 SYM_TYPED_FUNC_START(v4_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 retne lr @ no, we dont do anything 36 .v4_flush_kern_tlb_range: 37 bic r0, r0, #0x0ff 38 bic r0, r0, #0xf00 39 1: mcr p15, 0, r0, c8, c7, 1 @ invalidate TLB entry 40 add r0, r0, #PAGE_SZ 41 cmp r0, r1 42 blo 1b 43 ret lr 44 SYM_FUNC_END(v4_flush_user_tlb_range) 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 #ifdef CONFIG_CFI_CLANG 56 SYM_TYPED_FUNC_START(v4_flush_kern_tlb_range) 57 b .v4_flush_kern_tlb_range 58 SYM_FUNC_END(v4_flush_kern_tlb_range) 59 #else 60 .globl v4_flush_kern_tlb_range 61 .equ v4_flush_kern_tlb_range, .v4_flush_kern_tlb_range 62 #endif
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