| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * linux/arch/arm/mm/tlbv4.S |
| 4 | * |
| 5 | * Copyright (C) 1997-2002 Russell King |
| 6 | * |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 <asm/assembler.h> |
| 15 | #include <asm/asm-offsets.h> |
| 16 | #include <asm/tlbflush.h> |
| 17 | #include "proc-macros.S" |
| 18 | |
| 19 | .align 5 |
| 20 | /* |
| 21 | * v4_flush_user_tlb_range(start, end, mm) |
| 22 | * |
| 23 | * Invalidate a range of TLB entries in the specified user address space. |
| 24 | * |
| 25 | * - start - range start address |
| 26 | * - end - range end address |
| 27 | * - mm - mm_struct describing address space |
| 28 | */ |
| 29 | .align 5 |
| 30 | ENTRY(v4_flush_user_tlb_range) |
| 31 | vma_vm_mm ip, r2 |
| 32 | act_mm r3 @ get current->active_mm |
| 33 | eors r3, ip, r3 @ == mm ? |
| 34 | retne lr @ no, we dont do anything |
| 35 | .v4_flush_kern_tlb_range: |
| 36 | bic r0, r0, #0x0ff |
| 37 | bic r0, r0, #0xf00 |
| 38 | 1: mcr p15, 0, r0, c8, c7, 1 @ invalidate TLB entry |
| 39 | add r0, r0, #PAGE_SZ |
| 40 | cmp r0, r1 |
| 41 | blo 1b |
| 42 | ret lr |
| 43 | |
| 44 | /* |
| 45 | * v4_flush_kern_tlb_range(start, end) |
| 46 | * |
| 47 | * Invalidate a range of TLB entries in the specified kernel |
| 48 | * address range. |
| 49 | * |
| 50 | * - start - virtual address (may not be aligned) |
| 51 | * - end - virtual address (may not be aligned) |
| 52 | */ |
| 53 | .globl v4_flush_kern_tlb_range |
| 54 | .equ v4_flush_kern_tlb_range, .v4_flush_kern_tlb_range |
| 55 | |
| 56 | __INITDATA |
| 57 | |
| 58 | /* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */ |
| 59 | define_tlb_functions v4, v4_tlb_flags |