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