1// SPDX-License-Identifier: GPL-2.0
 2// Copyright (C) 2005-2017 Andes Technology Corporation
 3
 4#include <linux/spinlock_types.h>
 5#include <linux/mm.h>
 6#include <linux/sched.h>
 7#include <asm/nds32.h>
 8#include <nds32_intrinsic.h>
 9
10unsigned int cpu_last_cid = { TLB_MISC_mskCID + (2 << TLB_MISC_offCID) };
11
12DEFINE_SPINLOCK(cid_lock);
13
14void local_flush_tlb_range(struct vm_area_struct *vma,
15			   unsigned long start, unsigned long end)
16{
17	unsigned long flags, ocid, ncid;
18
19	if ((end - start) > 0x400000) {
20		__nds32__tlbop_flua();
21		__nds32__isb();
22		return;
23	}
24
25	spin_lock_irqsave(&cid_lock, flags);
26	ocid = __nds32__mfsr(NDS32_SR_TLB_MISC);
27	ncid = (ocid & ~TLB_MISC_mskCID) | vma->vm_mm->context.id;
28	__nds32__mtsr_dsb(ncid, NDS32_SR_TLB_MISC);
29	while (start < end) {
30		__nds32__tlbop_inv(start);
31		__nds32__isb();
32		start += PAGE_SIZE;
33	}
34	__nds32__mtsr_dsb(ocid, NDS32_SR_TLB_MISC);
35	spin_unlock_irqrestore(&cid_lock, flags);
36}
37
38void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
39{
40	unsigned long flags, ocid, ncid;
41
42	spin_lock_irqsave(&cid_lock, flags);
43	ocid = __nds32__mfsr(NDS32_SR_TLB_MISC);
44	ncid = (ocid & ~TLB_MISC_mskCID) | vma->vm_mm->context.id;
45	__nds32__mtsr_dsb(ncid, NDS32_SR_TLB_MISC);
46	__nds32__tlbop_inv(addr);
47	__nds32__isb();
48	__nds32__mtsr_dsb(ocid, NDS32_SR_TLB_MISC);
49	spin_unlock_irqrestore(&cid_lock, flags);
50}

 1// SPDX-License-Identifier: GPL-2.0
 2// Copyright (C) 2005-2017 Andes Technology Corporation
 3
 4#include <linux/spinlock_types.h>
 5#include <linux/mm.h>
 6#include <linux/sched.h>
 7#include <asm/nds32.h>
 8#include <nds32_intrinsic.h>
 9
10unsigned int cpu_last_cid = { TLB_MISC_mskCID + (2 << TLB_MISC_offCID) };
11
12DEFINE_SPINLOCK(cid_lock);
13
14void local_flush_tlb_range(struct vm_area_struct *vma,
15			   unsigned long start, unsigned long end)
16{
17	unsigned long flags, ocid, ncid;
18
19	if ((end - start) > 0x400000) {
20		__nds32__tlbop_flua();
21		__nds32__isb();
22		return;
23	}
24
25	spin_lock_irqsave(&cid_lock, flags);
26	ocid = __nds32__mfsr(NDS32_SR_TLB_MISC);
27	ncid = (ocid & ~TLB_MISC_mskCID) | vma->vm_mm->context.id;
28	__nds32__mtsr_dsb(ncid, NDS32_SR_TLB_MISC);
29	while (start < end) {
30		__nds32__tlbop_inv(start);
31		__nds32__isb();
32		start += PAGE_SIZE;
33	}
34	__nds32__mtsr_dsb(ocid, NDS32_SR_TLB_MISC);
35	spin_unlock_irqrestore(&cid_lock, flags);
36}
37
38void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
39{
40	unsigned long flags, ocid, ncid;
41
42	spin_lock_irqsave(&cid_lock, flags);
43	ocid = __nds32__mfsr(NDS32_SR_TLB_MISC);
44	ncid = (ocid & ~TLB_MISC_mskCID) | vma->vm_mm->context.id;
45	__nds32__mtsr_dsb(ncid, NDS32_SR_TLB_MISC);
46	__nds32__tlbop_inv(addr);
47	__nds32__isb();
48	__nds32__mtsr_dsb(ocid, NDS32_SR_TLB_MISC);
49	spin_unlock_irqrestore(&cid_lock, flags);
50}