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50 lines
1.3 KiB
50 lines
1.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// Copyright (C) 2005-2017 Andes Technology Corporation |
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#include <linux/spinlock_types.h> |
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#include <linux/mm.h> |
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#include <linux/sched.h> |
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#include <asm/nds32.h> |
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#include <nds32_intrinsic.h> |
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unsigned int cpu_last_cid = { TLB_MISC_mskCID + (2 << TLB_MISC_offCID) }; |
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DEFINE_SPINLOCK(cid_lock); |
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void local_flush_tlb_range(struct vm_area_struct *vma, |
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unsigned long start, unsigned long end) |
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{ |
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unsigned long flags, ocid, ncid; |
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if ((end - start) > 0x400000) { |
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__nds32__tlbop_flua(); |
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__nds32__isb(); |
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return; |
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} |
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spin_lock_irqsave(&cid_lock, flags); |
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ocid = __nds32__mfsr(NDS32_SR_TLB_MISC); |
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ncid = (ocid & ~TLB_MISC_mskCID) | vma->vm_mm->context.id; |
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__nds32__mtsr_dsb(ncid, NDS32_SR_TLB_MISC); |
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while (start < end) { |
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__nds32__tlbop_inv(start); |
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__nds32__isb(); |
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start += PAGE_SIZE; |
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} |
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__nds32__mtsr_dsb(ocid, NDS32_SR_TLB_MISC); |
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spin_unlock_irqrestore(&cid_lock, flags); |
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} |
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void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) |
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{ |
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unsigned long flags, ocid, ncid; |
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spin_lock_irqsave(&cid_lock, flags); |
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ocid = __nds32__mfsr(NDS32_SR_TLB_MISC); |
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ncid = (ocid & ~TLB_MISC_mskCID) | vma->vm_mm->context.id; |
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__nds32__mtsr_dsb(ncid, NDS32_SR_TLB_MISC); |
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__nds32__tlbop_inv(addr); |
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__nds32__isb(); |
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__nds32__mtsr_dsb(ocid, NDS32_SR_TLB_MISC); |
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spin_unlock_irqrestore(&cid_lock, flags); |
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}
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