From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- arch/nds32/mm/tlb.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 arch/nds32/mm/tlb.c (limited to 'arch/nds32/mm/tlb.c') diff --git a/arch/nds32/mm/tlb.c b/arch/nds32/mm/tlb.c new file mode 100644 index 000000000..dd41f5e07 --- /dev/null +++ b/arch/nds32/mm/tlb.c @@ -0,0 +1,50 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include +#include +#include +#include +#include + +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); +} -- cgit v1.2.3