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-rw-r--r--arch/mips/mm/tlb-andes.c259
1 files changed, 0 insertions, 259 deletions
diff --git a/arch/mips/mm/tlb-andes.c b/arch/mips/mm/tlb-andes.c
deleted file mode 100644
index 3f422a849c41..000000000000
--- a/arch/mips/mm/tlb-andes.c
+++ /dev/null
@@ -1,259 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1997, 1998, 1999 Ralf Baechle (ralf@gnu.org)
- * Copyright (C) 1999 Silicon Graphics, Inc.
- * Copyright (C) 2000 Kanoj Sarcar (kanoj@sgi.com)
- */
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/mmu_context.h>
-
-extern void build_tlb_refill_handler(void);
-
-#define NTLB_ENTRIES 64
-#define NTLB_ENTRIES_HALF 32
-
-void local_flush_tlb_all(void)
-{
- unsigned long flags;
- unsigned long old_ctx;
- unsigned long entry;
-
- local_irq_save(flags);
- /* Save old context and create impossible VPN2 value */
- old_ctx = read_c0_entryhi() & ASID_MASK;
- write_c0_entryhi(CKSEG0);
- write_c0_entrylo0(0);
- write_c0_entrylo1(0);
-
- entry = read_c0_wired();
-
- /* Blast 'em all away. */
- while (entry < NTLB_ENTRIES) {
- write_c0_index(entry);
- tlb_write_indexed();
- entry++;
- }
- write_c0_entryhi(old_ctx);
- local_irq_restore(flags);
-}
-
-void local_flush_tlb_mm(struct mm_struct *mm)
-{
- int cpu = smp_processor_id();
- if (cpu_context(cpu, mm) != 0) {
- drop_mmu_context(mm,cpu);
- }
-}
-
-void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
- unsigned long end)
-{
- struct mm_struct *mm = vma->vm_mm;
- int cpu = smp_processor_id();
-
- if (cpu_context(cpu, mm) != 0) {
- unsigned long flags;
- int size;
-
- local_irq_save(flags);
- size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
- size = (size + 1) >> 1;
- if (size <= NTLB_ENTRIES_HALF) {
- int oldpid = (read_c0_entryhi() & ASID_MASK);
- int newpid = (cpu_context(smp_processor_id(), mm)
- & ASID_MASK);
-
- start &= (PAGE_MASK << 1);
- end += ((PAGE_SIZE << 1) - 1);
- end &= (PAGE_MASK << 1);
- while(start < end) {
- int idx;
-
- write_c0_entryhi(start | newpid);
- start += (PAGE_SIZE << 1);
- tlb_probe();
- idx = read_c0_index();
- write_c0_entrylo0(0);
- write_c0_entrylo1(0);
- write_c0_entryhi(CKSEG0);
- if(idx < 0)
- continue;
- tlb_write_indexed();
- }
- write_c0_entryhi(oldpid);
- } else {
- drop_mmu_context(mm, cpu);
- }
- local_irq_restore(flags);
- }
-}
-
-void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
-{
- unsigned long flags;
- int size;
-
- size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
- size = (size + 1) >> 1;
-
- local_irq_save(flags);
- if (size <= NTLB_ENTRIES_HALF) {
- int pid = read_c0_entryhi();
-
- start &= (PAGE_MASK << 1);
- end += ((PAGE_SIZE << 1) - 1);
- end &= (PAGE_MASK << 1);
-
- while (start < end) {
- int idx;
-
- write_c0_entryhi(start);
- start += (PAGE_SIZE << 1);
- tlb_probe();
- idx = read_c0_index();
- write_c0_entrylo0(0);
- write_c0_entrylo1(0);
- write_c0_entryhi(CKSEG0 + (idx << (PAGE_SHIFT+1)));
- if (idx < 0)
- continue;
- tlb_write_indexed();
- }
- write_c0_entryhi(pid);
- } else {
- local_flush_tlb_all();
- }
- local_irq_restore(flags);
-}
-
-void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
-{
- if (cpu_context(smp_processor_id(), vma->vm_mm) != 0) {
- unsigned long flags;
- int oldpid, newpid, idx;
-
- newpid = (cpu_context(smp_processor_id(), vma->vm_mm) &
- ASID_MASK);
- page &= (PAGE_MASK << 1);
- local_irq_save(flags);
- oldpid = (read_c0_entryhi() & ASID_MASK);
- write_c0_entryhi(page | newpid);
- tlb_probe();
- idx = read_c0_index();
- write_c0_entrylo0(0);
- write_c0_entrylo1(0);
- write_c0_entryhi(CKSEG0);
- if (idx < 0)
- goto finish;
- tlb_write_indexed();
-
- finish:
- write_c0_entryhi(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);
- page &= (PAGE_MASK << 1);
- oldpid = read_c0_entryhi() & 0xff;
- write_c0_entryhi(page);
- tlb_probe();
- idx = read_c0_index();
- write_c0_entrylo0(0);
- write_c0_entrylo1(0);
- if (idx >= 0) {
- /* Make sure all entries differ. */
- write_c0_entryhi(CKSEG0+(idx<<(PAGE_SHIFT+1)));
- tlb_write_indexed();
- }
- write_c0_entryhi(oldpid);
-
- local_irq_restore(flags);
-}
-
-/* XXX Simplify this. On the R10000 writing a TLB entry for an virtual
- address that already exists will overwrite the old entry and not result
- in TLB malfunction or TLB shutdown. */
-void __update_tlb(struct vm_area_struct * vma, unsigned long address, pte_t pte)
-{
- unsigned long flags;
- pgd_t *pgdp;
- pud_t *pudp;
- pmd_t *pmdp;
- pte_t *ptep;
- int idx, pid;
-
- /*
- * Handle debugger faulting in for debugee.
- */
- if (current->active_mm != vma->vm_mm)
- return;
-
- pid = read_c0_entryhi() & ASID_MASK;
-
- if ((pid != (cpu_context(smp_processor_id(), vma->vm_mm) & ASID_MASK))
- || (cpu_context(smp_processor_id(), vma->vm_mm) == 0)) {
- printk(KERN_WARNING
- "%s: Wheee, bogus tlbpid mmpid=%d tlbpid=%d\n",
- __FUNCTION__, (int) (cpu_context(smp_processor_id(),
- vma->vm_mm) & ASID_MASK), pid);
- }
-
- local_irq_save(flags);
- address &= (PAGE_MASK << 1);
- write_c0_entryhi(address | (pid));
- pgdp = pgd_offset(vma->vm_mm, address);
- tlb_probe();
- pudp = pud_offset(pgdp, address);
- pmdp = pmd_offset(pudp, address);
- idx = read_c0_index();
- ptep = pte_offset_map(pmdp, address);
- write_c0_entrylo0(pte_val(*ptep++) >> 6);
- write_c0_entrylo1(pte_val(*ptep) >> 6);
- write_c0_entryhi(address | pid);
- if (idx < 0) {
- tlb_write_random();
- } else {
- tlb_write_indexed();
- }
- write_c0_entryhi(pid);
- local_irq_restore(flags);
-}
-
-void __init tlb_init(void)
-{
- /*
- * You should never change this register:
- * - On R4600 1.7 the tlbp never hits for pages smaller than
- * the value in the c0_pagemask register.
- * - The entire mm handling assumes the c0_pagemask register to
- * be set for 4kb pages.
- */
- write_c0_pagemask(PM_4K);
- write_c0_wired(0);
- write_c0_framemask(0);
-
- /* From this point on the ARC firmware is dead. */
- local_flush_tlb_all();
-
- /* Did I tell you that ARC SUCKS? */
-
- build_tlb_refill_handler();
-}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.