1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun // Copyright (C) 2005-2017 Andes Technology Corporation
3*4882a593Smuzhiyun
4*4882a593Smuzhiyun #include <linux/spinlock_types.h>
5*4882a593Smuzhiyun #include <linux/mm.h>
6*4882a593Smuzhiyun #include <linux/sched.h>
7*4882a593Smuzhiyun #include <asm/nds32.h>
8*4882a593Smuzhiyun #include <nds32_intrinsic.h>
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun unsigned int cpu_last_cid = { TLB_MISC_mskCID + (2 << TLB_MISC_offCID) };
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun DEFINE_SPINLOCK(cid_lock);
13*4882a593Smuzhiyun
local_flush_tlb_range(struct vm_area_struct * vma,unsigned long start,unsigned long end)14*4882a593Smuzhiyun void local_flush_tlb_range(struct vm_area_struct *vma,
15*4882a593Smuzhiyun unsigned long start, unsigned long end)
16*4882a593Smuzhiyun {
17*4882a593Smuzhiyun unsigned long flags, ocid, ncid;
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun if ((end - start) > 0x400000) {
20*4882a593Smuzhiyun __nds32__tlbop_flua();
21*4882a593Smuzhiyun __nds32__isb();
22*4882a593Smuzhiyun return;
23*4882a593Smuzhiyun }
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun spin_lock_irqsave(&cid_lock, flags);
26*4882a593Smuzhiyun ocid = __nds32__mfsr(NDS32_SR_TLB_MISC);
27*4882a593Smuzhiyun ncid = (ocid & ~TLB_MISC_mskCID) | vma->vm_mm->context.id;
28*4882a593Smuzhiyun __nds32__mtsr_dsb(ncid, NDS32_SR_TLB_MISC);
29*4882a593Smuzhiyun while (start < end) {
30*4882a593Smuzhiyun __nds32__tlbop_inv(start);
31*4882a593Smuzhiyun __nds32__isb();
32*4882a593Smuzhiyun start += PAGE_SIZE;
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun __nds32__mtsr_dsb(ocid, NDS32_SR_TLB_MISC);
35*4882a593Smuzhiyun spin_unlock_irqrestore(&cid_lock, flags);
36*4882a593Smuzhiyun }
37*4882a593Smuzhiyun
local_flush_tlb_page(struct vm_area_struct * vma,unsigned long addr)38*4882a593Smuzhiyun void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun unsigned long flags, ocid, ncid;
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun spin_lock_irqsave(&cid_lock, flags);
43*4882a593Smuzhiyun ocid = __nds32__mfsr(NDS32_SR_TLB_MISC);
44*4882a593Smuzhiyun ncid = (ocid & ~TLB_MISC_mskCID) | vma->vm_mm->context.id;
45*4882a593Smuzhiyun __nds32__mtsr_dsb(ncid, NDS32_SR_TLB_MISC);
46*4882a593Smuzhiyun __nds32__tlbop_inv(addr);
47*4882a593Smuzhiyun __nds32__isb();
48*4882a593Smuzhiyun __nds32__mtsr_dsb(ocid, NDS32_SR_TLB_MISC);
49*4882a593Smuzhiyun spin_unlock_irqrestore(&cid_lock, flags);
50*4882a593Smuzhiyun }
51