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67 lines
1.7 KiB
67 lines
1.7 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* linux/arch/arm/mm/tlb-fa.S |
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* |
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* Copyright (C) 2005 Faraday Corp. |
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* Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt> |
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* |
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* Based on tlb-v4wbi.S: |
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* Copyright (C) 1997-2002 Russell King |
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* |
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* ARM architecture version 4, Faraday variation. |
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* This assume an unified TLBs, with a write buffer, and branch target buffer (BTB) |
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* |
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* Processors: FA520 FA526 FA626 |
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*/ |
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#include <linux/linkage.h> |
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#include <linux/init.h> |
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#include <asm/assembler.h> |
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#include <asm/asm-offsets.h> |
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#include <asm/tlbflush.h> |
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#include "proc-macros.S" |
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/* |
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* flush_user_tlb_range(start, end, mm) |
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* |
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* Invalidate a range of TLB entries in the specified address space. |
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* |
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* - start - range start address |
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* - end - range end address |
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* - mm - mm_struct describing address space |
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*/ |
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.align 4 |
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ENTRY(fa_flush_user_tlb_range) |
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vma_vm_mm ip, r2 |
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act_mm r3 @ get current->active_mm |
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eors r3, ip, r3 @ == mm ? |
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retne lr @ no, we dont do anything |
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mov r3, #0 |
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mcr p15, 0, r3, c7, c10, 4 @ drain WB |
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bic r0, r0, #0x0ff |
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bic r0, r0, #0xf00 |
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1: mcr p15, 0, r0, c8, c7, 1 @ invalidate UTLB entry |
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add r0, r0, #PAGE_SZ |
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cmp r0, r1 |
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blo 1b |
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mcr p15, 0, r3, c7, c10, 4 @ data write barrier |
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ret lr |
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ENTRY(fa_flush_kern_tlb_range) |
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mov r3, #0 |
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mcr p15, 0, r3, c7, c10, 4 @ drain WB |
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bic r0, r0, #0x0ff |
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bic r0, r0, #0xf00 |
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1: mcr p15, 0, r0, c8, c7, 1 @ invalidate UTLB entry |
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add r0, r0, #PAGE_SZ |
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cmp r0, r1 |
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blo 1b |
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mcr p15, 0, r3, c7, c10, 4 @ data write barrier |
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mcr p15, 0, r3, c7, c5, 4 @ prefetch flush (isb) |
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ret lr |
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__INITDATA |
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/* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */ |
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define_tlb_functions fa, fa_tlb_flags
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