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authorDavid S. Miller <davem@davemloft.net>2008-07-18 11:39:39 +0200
committerDavid S. Miller <davem@davemloft.net>2008-07-18 11:39:39 +0200
commit49997d75152b3d23c53b0fa730599f2f74c92c65 (patch)
tree46e93126170d02cfec9505172e545732c1b69656 /arch/ppc/mm/tlb.c
parentpkt_sched: Make default qdisc nonshared-multiqueue safe. (diff)
parentMerge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff)
downloadlinux-49997d75152b3d23c53b0fa730599f2f74c92c65.tar.xz
linux-49997d75152b3d23c53b0fa730599f2f74c92c65.zip
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts: Documentation/powerpc/booting-without-of.txt drivers/atm/Makefile drivers/net/fs_enet/fs_enet-main.c drivers/pci/pci-acpi.c net/8021q/vlan.c net/iucv/iucv.c
Diffstat (limited to 'arch/ppc/mm/tlb.c')
-rw-r--r--arch/ppc/mm/tlb.c183
1 files changed, 0 insertions, 183 deletions
diff --git a/arch/ppc/mm/tlb.c b/arch/ppc/mm/tlb.c
deleted file mode 100644
index 4ff260bc9dd1..000000000000
--- a/arch/ppc/mm/tlb.c
+++ /dev/null
@@ -1,183 +0,0 @@
-/*
- * This file contains the routines for TLB flushing.
- * On machines where the MMU uses a hash table to store virtual to
- * physical translations, these routines flush entries from the
- * hash table also.
- * -- paulus
- *
- * Derived from arch/ppc/mm/init.c:
- * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- * Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
- * and Cort Dougan (PReP) (cort@cs.nmt.edu)
- * Copyright (C) 1996 Paul Mackerras
- * Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk).
- *
- * Derived from "arch/i386/mm/init.c"
- * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
- *
- * 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.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/highmem.h>
-#include <linux/pagemap.h>
-#include <asm/tlbflush.h>
-#include <asm/tlb.h>
-
-#include "mmu_decl.h"
-
-/*
- * Called when unmapping pages to flush entries from the TLB/hash table.
- */
-void flush_hash_entry(struct mm_struct *mm, pte_t *ptep, unsigned long addr)
-{
- unsigned long ptephys;
-
- if (Hash != 0) {
- ptephys = __pa(ptep) & PAGE_MASK;
- flush_hash_pages(mm->context.id, addr, ptephys, 1);
- }
-}
-
-/*
- * Called by ptep_set_access_flags, must flush on CPUs for which the
- * DSI handler can't just "fixup" the TLB on a write fault
- */
-void flush_tlb_page_nohash(struct vm_area_struct *vma, unsigned long addr)
-{
- if (Hash != 0)
- return;
- _tlbie(addr);
-}
-
-/*
- * Called at the end of a mmu_gather operation to make sure the
- * TLB flush is completely done.
- */
-void tlb_flush(struct mmu_gather *tlb)
-{
- if (Hash == 0) {
- /*
- * 603 needs to flush the whole TLB here since
- * it doesn't use a hash table.
- */
- _tlbia();
- }
-}
-
-/*
- * TLB flushing:
- *
- * - flush_tlb_mm(mm) flushes the specified mm context TLB's
- * - flush_tlb_page(vma, vmaddr) flushes one page
- * - flush_tlb_range(vma, start, end) flushes a range of pages
- * - flush_tlb_kernel_range(start, end) flushes kernel pages
- *
- * since the hardware hash table functions as an extension of the
- * tlb as far as the linux tables are concerned, flush it too.
- * -- Cort
- */
-
-/*
- * 750 SMP is a Bad Idea because the 750 doesn't broadcast all
- * the cache operations on the bus. Hence we need to use an IPI
- * to get the other CPU(s) to invalidate their TLBs.
- */
-#ifdef CONFIG_SMP_750
-#define FINISH_FLUSH smp_send_tlb_invalidate(0)
-#else
-#define FINISH_FLUSH do { } while (0)
-#endif
-
-static void flush_range(struct mm_struct *mm, unsigned long start,
- unsigned long end)
-{
- pmd_t *pmd;
- unsigned long pmd_end;
- int count;
- unsigned int ctx = mm->context.id;
-
- if (Hash == 0) {
- _tlbia();
- return;
- }
- start &= PAGE_MASK;
- if (start >= end)
- return;
- end = (end - 1) | ~PAGE_MASK;
- pmd = pmd_offset(pgd_offset(mm, start), start);
- for (;;) {
- pmd_end = ((start + PGDIR_SIZE) & PGDIR_MASK) - 1;
- if (pmd_end > end)
- pmd_end = end;
- if (!pmd_none(*pmd)) {
- count = ((pmd_end - start) >> PAGE_SHIFT) + 1;
- flush_hash_pages(ctx, start, pmd_val(*pmd), count);
- }
- if (pmd_end == end)
- break;
- start = pmd_end + 1;
- ++pmd;
- }
-}
-
-/*
- * Flush kernel TLB entries in the given range
- */
-void flush_tlb_kernel_range(unsigned long start, unsigned long end)
-{
- flush_range(&init_mm, start, end);
- FINISH_FLUSH;
-}
-
-/*
- * Flush all the (user) entries for the address space described by mm.
- */
-void flush_tlb_mm(struct mm_struct *mm)
-{
- struct vm_area_struct *mp;
-
- if (Hash == 0) {
- _tlbia();
- return;
- }
-
- for (mp = mm->mmap; mp != NULL; mp = mp->vm_next)
- flush_range(mp->vm_mm, mp->vm_start, mp->vm_end);
- FINISH_FLUSH;
-}
-
-void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
-{
- struct mm_struct *mm;
- pmd_t *pmd;
-
- if (Hash == 0) {
- _tlbie(vmaddr);
- return;
- }
- mm = (vmaddr < TASK_SIZE)? vma->vm_mm: &init_mm;
- pmd = pmd_offset(pgd_offset(mm, vmaddr), vmaddr);
- if (!pmd_none(*pmd))
- flush_hash_pages(mm->context.id, vmaddr, pmd_val(*pmd), 1);
- FINISH_FLUSH;
-}
-
-/*
- * For each address in the range, find the pte for the address
- * and check _PAGE_HASHPTE bit; if it is set, find and destroy
- * the corresponding HPTE.
- */
-void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
- unsigned long end)
-{
- flush_range(vma->vm_mm, start, end);
- FINISH_FLUSH;
-}