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Diffstat (limited to 'arch/score/mm/tlb-score.c')
-rw-r--r--arch/score/mm/tlb-score.c251
1 files changed, 0 insertions, 251 deletions
diff --git a/arch/score/mm/tlb-score.c b/arch/score/mm/tlb-score.c
deleted file mode 100644
index 004073717de0..000000000000
--- a/arch/score/mm/tlb-score.c
+++ /dev/null
@@ -1,251 +0,0 @@
-/*
- * arch/score/mm/tlb-score.c
- *
- * Score Processor version.
- *
- * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
- * Lennox Wu <lennox.wu@sunplusct.com>
- * Chen Liqin <liqin.chen@sunplusct.com>
- *
- * 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; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <linux/highmem.h>
-#include <linux/module.h>
-
-#include <asm/irq.h>
-#include <asm/mmu_context.h>
-#include <asm/tlb.h>
-
-#define TLBSIZE 32
-
-unsigned long asid_cache = ASID_FIRST_VERSION;
-EXPORT_SYMBOL(asid_cache);
-
-void local_flush_tlb_all(void)
-{
- unsigned long flags;
- unsigned long old_ASID;
- int entry;
-
- local_irq_save(flags);
- old_ASID = pevn_get() & ASID_MASK;
- pectx_set(0); /* invalid */
- entry = tlblock_get(); /* skip locked entries*/
-
- for (; entry < TLBSIZE; entry++) {
- tlbpt_set(entry);
- pevn_set(KSEG1);
- barrier();
- tlb_write_indexed();
- }
- pevn_set(old_ASID);
- local_irq_restore(flags);
-}
-
-/*
- * If mm is currently active_mm, we can't really drop it. Instead,
- * we will get a new one for it.
- */
-static inline void
-drop_mmu_context(struct mm_struct *mm)
-{
- unsigned long flags;
-
- local_irq_save(flags);
- get_new_mmu_context(mm);
- pevn_set(mm->context & ASID_MASK);
- local_irq_restore(flags);
-}
-
-void local_flush_tlb_mm(struct mm_struct *mm)
-{
- if (mm->context != 0)
- drop_mmu_context(mm);
-}
-
-void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
- unsigned long end)
-{
- struct mm_struct *mm = vma->vm_mm;
- unsigned long vma_mm_context = mm->context;
- if (mm->context != 0) {
- unsigned long flags;
- int size;
-
- local_irq_save(flags);
- size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
- if (size <= TLBSIZE) {
- int oldpid = pevn_get() & ASID_MASK;
- int newpid = vma_mm_context & ASID_MASK;
-
- start &= PAGE_MASK;
- end += (PAGE_SIZE - 1);
- end &= PAGE_MASK;
- while (start < end) {
- int idx;
-
- pevn_set(start | newpid);
- start += PAGE_SIZE;
- barrier();
- tlb_probe();
- idx = tlbpt_get();
- pectx_set(0);
- pevn_set(KSEG1);
- if (idx < 0)
- continue;
- tlb_write_indexed();
- }
- pevn_set(oldpid);
- } else {
- /* Bigger than TLBSIZE, get new ASID directly */
- get_new_mmu_context(mm);
- if (mm == current->active_mm)
- pevn_set(vma_mm_context & ASID_MASK);
- }
- local_irq_restore(flags);
- }
-}
-
-void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
-{
- unsigned long flags;
- int size;
-
- local_irq_save(flags);
- size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
- if (size <= TLBSIZE) {
- int pid = pevn_get();
-
- start &= PAGE_MASK;
- end += PAGE_SIZE - 1;
- end &= PAGE_MASK;
-
- while (start < end) {
- long idx;
-
- pevn_set(start);
- start += PAGE_SIZE;
- tlb_probe();
- idx = tlbpt_get();
- if (idx < 0)
- continue;
- pectx_set(0);
- pevn_set(KSEG1);
- barrier();
- tlb_write_indexed();
- }
- pevn_set(pid);
- } else {
- local_flush_tlb_all();
- }
-
- local_irq_restore(flags);
-}
-
-void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
-{
- if (vma && vma->vm_mm->context != 0) {
- unsigned long flags;
- int oldpid, newpid, idx;
- unsigned long vma_ASID = vma->vm_mm->context;
-
- newpid = vma_ASID & ASID_MASK;
- page &= PAGE_MASK;
- local_irq_save(flags);
- oldpid = pevn_get() & ASID_MASK;
- pevn_set(page | newpid);
- barrier();
- tlb_probe();
- idx = tlbpt_get();
- pectx_set(0);
- pevn_set(KSEG1);
- if (idx < 0) /* p_bit(31) - 1: miss, 0: hit*/
- goto finish;
- barrier();
- tlb_write_indexed();
-finish:
- pevn_set(oldpid);
- local_irq_restore(flags);
- }
-}
-
-/*
- * This one is only used for pages with the global bit set so we don't care
- * much about the ASID.
- */
-void local_flush_tlb_one(unsigned long page)
-{
- unsigned long flags;
- int oldpid, idx;
-
- local_irq_save(flags);
- oldpid = pevn_get();
- page &= (PAGE_MASK << 1);
- pevn_set(page);
- barrier();
- tlb_probe();
- idx = tlbpt_get();
- pectx_set(0);
- if (idx >= 0) {
- /* Make sure all entries differ. */
- pevn_set(KSEG1);
- barrier();
- tlb_write_indexed();
- }
- pevn_set(oldpid);
- local_irq_restore(flags);
-}
-
-void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
-{
- unsigned long flags;
- int idx, pid;
-
- /*
- * Handle debugger faulting in for debugee.
- */
- if (current->active_mm != vma->vm_mm)
- return;
-
- pid = pevn_get() & ASID_MASK;
-
- local_irq_save(flags);
- address &= PAGE_MASK;
- pevn_set(address | pid);
- barrier();
- tlb_probe();
- idx = tlbpt_get();
- pectx_set(pte_val(pte));
- pevn_set(address | pid);
- if (idx < 0)
- tlb_write_random();
- else
- tlb_write_indexed();
-
- pevn_set(pid);
- local_irq_restore(flags);
-}
-
-void tlb_init(void)
-{
- tlblock_set(0);
- local_flush_tlb_all();
- memcpy((void *)(EXCEPTION_VECTOR_BASE_ADDR + 0x100),
- &score7_FTLB_refill_Handler, 0xFC);
- flush_icache_range(EXCEPTION_VECTOR_BASE_ADDR + 0x100,
- EXCEPTION_VECTOR_BASE_ADDR + 0x1FC);
-}
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