diff options
Diffstat (limited to 'arch/tile/kernel/tlb.c')
-rw-r--r-- | arch/tile/kernel/tlb.c | 104 |
1 files changed, 0 insertions, 104 deletions
diff --git a/arch/tile/kernel/tlb.c b/arch/tile/kernel/tlb.c deleted file mode 100644 index f23b53515671..000000000000 --- a/arch/tile/kernel/tlb.c +++ /dev/null @@ -1,104 +0,0 @@ -/* - * Copyright 2010 Tilera Corporation. All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation, version 2. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for - * more details. - * - */ - -#include <linux/cpumask.h> -#include <linux/module.h> -#include <linux/hugetlb.h> -#include <asm/tlbflush.h> -#include <asm/homecache.h> -#include <hv/hypervisor.h> - -/* From tlbflush.h */ -DEFINE_PER_CPU(int, current_asid); -int min_asid, max_asid; - -/* - * Note that we flush the L1I (for VM_EXEC pages) as well as the TLB - * so that when we are unmapping an executable page, we also flush it. - * Combined with flushing the L1I at context switch time, this means - * we don't have to do any other icache flushes. - */ - -void flush_tlb_mm(struct mm_struct *mm) -{ - HV_Remote_ASID asids[NR_CPUS]; - int i = 0, cpu; - for_each_cpu(cpu, mm_cpumask(mm)) { - HV_Remote_ASID *asid = &asids[i++]; - asid->y = cpu / smp_topology.width; - asid->x = cpu % smp_topology.width; - asid->asid = per_cpu(current_asid, cpu); - } - flush_remote(0, HV_FLUSH_EVICT_L1I, mm_cpumask(mm), - 0, 0, 0, NULL, asids, i); -} - -void flush_tlb_current_task(void) -{ - flush_tlb_mm(current->mm); -} - -void flush_tlb_page_mm(struct vm_area_struct *vma, struct mm_struct *mm, - unsigned long va) -{ - unsigned long size = vma_kernel_pagesize(vma); - int cache = (vma->vm_flags & VM_EXEC) ? HV_FLUSH_EVICT_L1I : 0; - flush_remote(0, cache, mm_cpumask(mm), - va, size, size, mm_cpumask(mm), NULL, 0); -} - -void flush_tlb_page(struct vm_area_struct *vma, unsigned long va) -{ - flush_tlb_page_mm(vma, vma->vm_mm, va); -} -EXPORT_SYMBOL(flush_tlb_page); - -void flush_tlb_range(struct vm_area_struct *vma, - unsigned long start, unsigned long end) -{ - unsigned long size = vma_kernel_pagesize(vma); - struct mm_struct *mm = vma->vm_mm; - int cache = (vma->vm_flags & VM_EXEC) ? HV_FLUSH_EVICT_L1I : 0; - flush_remote(0, cache, mm_cpumask(mm), start, end - start, size, - mm_cpumask(mm), NULL, 0); -} - -void flush_tlb_all(void) -{ - int i; - for (i = 0; ; ++i) { - HV_VirtAddrRange r = hv_inquire_virtual(i); - if (r.size == 0) - break; - flush_remote(0, HV_FLUSH_EVICT_L1I, cpu_online_mask, - r.start, r.size, PAGE_SIZE, cpu_online_mask, - NULL, 0); - flush_remote(0, 0, NULL, - r.start, r.size, HPAGE_SIZE, cpu_online_mask, - NULL, 0); - } -} - -/* - * Callers need to flush the L1I themselves if necessary, e.g. for - * kernel module unload. Otherwise we assume callers are not using - * executable pgprot_t's. Using EVICT_L1I means that dataplane cpus - * will get an unnecessary interrupt otherwise. - */ -void flush_tlb_kernel_range(unsigned long start, unsigned long end) -{ - flush_remote(0, 0, NULL, - start, end - start, PAGE_SIZE, cpu_online_mask, NULL, 0); -} |