diff options
Diffstat (limited to '')
| -rw-r--r-- | arch/arm/mm/tlb-v4.S | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/arm/mm/tlb-v4.S b/arch/arm/mm/tlb-v4.S new file mode 100644 index 000000000..b962b4e75 --- /dev/null +++ b/arch/arm/mm/tlb-v4.S @@ -0,0 +1,59 @@ +/* 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 <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 +ENTRY(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 + +/* + * 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) + */ +.globl v4_flush_kern_tlb_range +.equ v4_flush_kern_tlb_range, .v4_flush_kern_tlb_range + + __INITDATA + + /* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */ + define_tlb_functions v4, v4_tlb_flags |