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-rw-r--r--arch/cris/arch-v10/mm/tlb.c179
1 files changed, 0 insertions, 179 deletions
diff --git a/arch/cris/arch-v10/mm/tlb.c b/arch/cris/arch-v10/mm/tlb.c
deleted file mode 100644
index 7f1f752f2445..000000000000
--- a/arch/cris/arch-v10/mm/tlb.c
+++ /dev/null
@@ -1,179 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * linux/arch/cris/arch-v10/mm/tlb.c
- *
- * Low level TLB handling
- *
- *
- * Copyright (C) 2000-2007 Axis Communications AB
- *
- * Authors: Bjorn Wesen (bjornw@axis.com)
- *
- */
-
-#include <linux/mm_types.h>
-
-#include <asm/tlb.h>
-#include <asm/mmu_context.h>
-#include <arch/svinto.h>
-
-#define D(x)
-
-/* The TLB can host up to 64 different mm contexts at the same time.
- * The running context is R_MMU_CONTEXT, and each TLB entry contains a
- * page_id that has to match to give a hit. In page_id_map, we keep track
- * of which mm's we have assigned which page_id's, so that we know when
- * to invalidate TLB entries.
- *
- * The last page_id is never running - it is used as an invalid page_id
- * so we can make TLB entries that will never match.
- *
- * Notice that we need to make the flushes atomic, otherwise an interrupt
- * handler that uses vmalloced memory might cause a TLB load in the middle
- * of a flush causing.
- */
-
-/* invalidate all TLB entries */
-
-void
-flush_tlb_all(void)
-{
- int i;
- unsigned long flags;
-
- /* the vpn of i & 0xf is so we dont write similar TLB entries
- * in the same 4-way entry group. details...
- */
-
- local_irq_save(flags);
- for(i = 0; i < NUM_TLB_ENTRIES; i++) {
- *R_TLB_SELECT = ( IO_FIELD(R_TLB_SELECT, index, i) );
- *R_TLB_HI = ( IO_FIELD(R_TLB_HI, page_id, INVALID_PAGEID ) |
- IO_FIELD(R_TLB_HI, vpn, i & 0xf ) );
-
- *R_TLB_LO = ( IO_STATE(R_TLB_LO, global,no ) |
- IO_STATE(R_TLB_LO, valid, no ) |
- IO_STATE(R_TLB_LO, kernel,no ) |
- IO_STATE(R_TLB_LO, we, no ) |
- IO_FIELD(R_TLB_LO, pfn, 0 ) );
- }
- local_irq_restore(flags);
- D(printk("tlb: flushed all\n"));
-}
-
-/* invalidate the selected mm context only */
-
-void
-flush_tlb_mm(struct mm_struct *mm)
-{
- int i;
- int page_id = mm->context.page_id;
- unsigned long flags;
-
- D(printk("tlb: flush mm context %d (%p)\n", page_id, mm));
-
- if(page_id == NO_CONTEXT)
- return;
-
- /* mark the TLB entries that match the page_id as invalid.
- * here we could also check the _PAGE_GLOBAL bit and NOT flush
- * global pages. is it worth the extra I/O ?
- */
-
- local_irq_save(flags);
- for(i = 0; i < NUM_TLB_ENTRIES; i++) {
- *R_TLB_SELECT = IO_FIELD(R_TLB_SELECT, index, i);
- if (IO_EXTRACT(R_TLB_HI, page_id, *R_TLB_HI) == page_id) {
- *R_TLB_HI = ( IO_FIELD(R_TLB_HI, page_id, INVALID_PAGEID ) |
- IO_FIELD(R_TLB_HI, vpn, i & 0xf ) );
-
- *R_TLB_LO = ( IO_STATE(R_TLB_LO, global,no ) |
- IO_STATE(R_TLB_LO, valid, no ) |
- IO_STATE(R_TLB_LO, kernel,no ) |
- IO_STATE(R_TLB_LO, we, no ) |
- IO_FIELD(R_TLB_LO, pfn, 0 ) );
- }
- }
- local_irq_restore(flags);
-}
-
-/* invalidate a single page */
-
-void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
-{
- struct mm_struct *mm = vma->vm_mm;
- int page_id = mm->context.page_id;
- int i;
- unsigned long flags;
-
- D(printk("tlb: flush page %p in context %d (%p)\n", addr, page_id, mm));
-
- if(page_id == NO_CONTEXT)
- return;
-
- addr &= PAGE_MASK; /* perhaps not necessary */
-
- /* invalidate those TLB entries that match both the mm context
- * and the virtual address requested
- */
-
- local_irq_save(flags);
- for(i = 0; i < NUM_TLB_ENTRIES; i++) {
- unsigned long tlb_hi;
- *R_TLB_SELECT = IO_FIELD(R_TLB_SELECT, index, i);
- tlb_hi = *R_TLB_HI;
- if (IO_EXTRACT(R_TLB_HI, page_id, tlb_hi) == page_id &&
- (tlb_hi & PAGE_MASK) == addr) {
- *R_TLB_HI = IO_FIELD(R_TLB_HI, page_id, INVALID_PAGEID ) |
- addr; /* same addr as before works. */
-
- *R_TLB_LO = ( IO_STATE(R_TLB_LO, global,no ) |
- IO_STATE(R_TLB_LO, valid, no ) |
- IO_STATE(R_TLB_LO, kernel,no ) |
- IO_STATE(R_TLB_LO, we, no ) |
- IO_FIELD(R_TLB_LO, pfn, 0 ) );
- }
- }
- local_irq_restore(flags);
-}
-
-/*
- * Initialize the context related info for a new mm_struct
- * instance.
- */
-
-int
-init_new_context(struct task_struct *tsk, struct mm_struct *mm)
-{
- mm->context.page_id = NO_CONTEXT;
- return 0;
-}
-
-/* called in schedule() just before actually doing the switch_to */
-
-void switch_mm(struct mm_struct *prev, struct mm_struct *next,
- struct task_struct *tsk)
-{
- if (prev != next) {
- /* make sure we have a context */
- get_mmu_context(next);
-
- /* remember the pgd for the fault handlers
- * this is similar to the pgd register in some other CPU's.
- * we need our own copy of it because current and active_mm
- * might be invalid at points where we still need to derefer
- * the pgd.
- */
-
- per_cpu(current_pgd, smp_processor_id()) = next->pgd;
-
- /* switch context in the MMU */
-
- D(printk(KERN_DEBUG "switching mmu_context to %d (%p)\n",
- next->context, next));
-
- *R_MMU_CONTEXT = IO_FIELD(R_MMU_CONTEXT,
- page_id, next->context.page_id);
- }
-}
-