| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * linux/arch/arm/mm/tlbv4.S |
| * |
| * Copyright (C) 1997-2002 Russell King |
| * |
| * ARM architecture version 4 TLB handling functions. |
| * These assume a split I/D TLBs, and no write buffer. |
| * |
| * Processors: ARM720T |
| */ |
| #include <linux/linkage.h> |
| #include <linux/init.h> |
| #include <linux/cfi_types.h> |
| #include <asm/assembler.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/tlbflush.h> |
| #include "proc-macros.S" |
| |
| .align 5 |
| /* |
| * v4_flush_user_tlb_range(start, end, mm) |
| * |
| * Invalidate a range of TLB entries in the specified user address space. |
| * |
| * - start - range start address |
| * - end - range end address |
| * - mm - mm_struct describing address space |
| */ |
| .align 5 |
| SYM_TYPED_FUNC_START(v4_flush_user_tlb_range) |
| vma_vm_mm ip, r2 |
| act_mm r3 @ get current->active_mm |
| eors r3, ip, r3 @ == mm ? |
| retne lr @ no, we dont do anything |
| .v4_flush_kern_tlb_range: |
| bic r0, r0, #0x0ff |
| bic r0, r0, #0xf00 |
| 1: mcr p15, 0, r0, c8, c7, 1 @ invalidate TLB entry |
| add r0, r0, #PAGE_SZ |
| cmp r0, r1 |
| blo 1b |
| ret lr |
| SYM_FUNC_END(v4_flush_user_tlb_range) |
| |
| /* |
| * v4_flush_kern_tlb_range(start, end) |
| * |
| * Invalidate a range of TLB entries in the specified kernel |
| * address range. |
| * |
| * - start - virtual address (may not be aligned) |
| * - end - virtual address (may not be aligned) |
| */ |
| #ifdef CONFIG_CFI_CLANG |
| SYM_TYPED_FUNC_START(v4_flush_kern_tlb_range) |
| b .v4_flush_kern_tlb_range |
| SYM_FUNC_END(v4_flush_kern_tlb_range) |
| #else |
| .globl v4_flush_kern_tlb_range |
| .equ v4_flush_kern_tlb_range, .v4_flush_kern_tlb_range |
| #endif |
