powerpc: Merge arch/ppc64/mm to arch/powerpc/mm

This moves the remaining files in arch/ppc64/mm to arch/powerpc/mm,
and arranges that we use them when compiling with ARCH=ppc64.

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 0 insertions, 196 deletions

diff --git a/arch/ppc64/mm/tlb.c b/arch/ppc64/mm/tlb.c
deleted file mode 100644
index 09ab81a10f4..00000000000
--- a/arch/ppc64/mm/tlb.c
+++ /dev/null
@@ -1,196 +0,0 @@
-/*
- * This file contains the routines for flushing entries from the
- * TLB and MMU hash table.
- *
- *  Derived from arch/ppc64/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
- *
- *  Dave Engebretsen <engebret@us.ibm.com>
- *      Rework for PPC64 port.
- *
- *  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/config.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/percpu.h>
-#include <linux/hardirq.h>
-#include <asm/pgalloc.h>
-#include <asm/tlbflush.h>
-#include <asm/tlb.h>
-#include <linux/highmem.h>
-
-DEFINE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch);
-
-/* This is declared as we are using the more or less generic
- * include/asm-ppc64/tlb.h file -- tgall
- */
-DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
-DEFINE_PER_CPU(struct pte_freelist_batch *, pte_freelist_cur);
-unsigned long pte_freelist_forced_free;
-
-struct pte_freelist_batch
-{
-	struct rcu_head	rcu;
-	unsigned int	index;
-	pgtable_free_t	tables[0];
-};
-
-DEFINE_PER_CPU(struct pte_freelist_batch *, pte_freelist_cur);
-unsigned long pte_freelist_forced_free;
-
-#define PTE_FREELIST_SIZE \
-	((PAGE_SIZE - sizeof(struct pte_freelist_batch)) \
-	  / sizeof(pgtable_free_t))
-
-#ifdef CONFIG_SMP
-static void pte_free_smp_sync(void *arg)
-{
-	/* Do nothing, just ensure we sync with all CPUs */
-}
-#endif
-
-/* This is only called when we are critically out of memory
- * (and fail to get a page in pte_free_tlb).
- */
-static void pgtable_free_now(pgtable_free_t pgf)
-{
-	pte_freelist_forced_free++;
-
-	smp_call_function(pte_free_smp_sync, NULL, 0, 1);
-
-	pgtable_free(pgf);
-}
-
-static void pte_free_rcu_callback(struct rcu_head *head)
-{
-	struct pte_freelist_batch *batch =
-		container_of(head, struct pte_freelist_batch, rcu);
-	unsigned int i;
-
-	for (i = 0; i < batch->index; i++)
-		pgtable_free(batch->tables[i]);
-
-	free_page((unsigned long)batch);
-}
-
-static void pte_free_submit(struct pte_freelist_batch *batch)
-{
-	INIT_RCU_HEAD(&batch->rcu);
-	call_rcu(&batch->rcu, pte_free_rcu_callback);
-}
-
-void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf)
-{
-	/* This is safe as we are holding page_table_lock */
-        cpumask_t local_cpumask = cpumask_of_cpu(smp_processor_id());
-	struct pte_freelist_batch **batchp = &__get_cpu_var(pte_freelist_cur);
-
-	if (atomic_read(&tlb->mm->mm_users) < 2 ||
-	    cpus_equal(tlb->mm->cpu_vm_mask, local_cpumask)) {
-		pgtable_free(pgf);
-		return;
-	}
-
-	if (*batchp == NULL) {
-		*batchp = (struct pte_freelist_batch *)__get_free_page(GFP_ATOMIC);
-		if (*batchp == NULL) {
-			pgtable_free_now(pgf);
-			return;
-		}
-		(*batchp)->index = 0;
-	}
-	(*batchp)->tables[(*batchp)->index++] = pgf;
-	if ((*batchp)->index == PTE_FREELIST_SIZE) {
-		pte_free_submit(*batchp);
-		*batchp = NULL;
-	}
-}
-
-/*
- * Update the MMU hash table to correspond with a change to
- * a Linux PTE.  If wrprot is true, it is permissible to
- * change the existing HPTE to read-only rather than removing it
- * (if we remove it we should clear the _PTE_HPTEFLAGS bits).
- */
-void hpte_update(struct mm_struct *mm, unsigned long addr,
-		 unsigned long pte, int wrprot)
-{
-	struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
-	unsigned long vsid;
-	int i;
-
-	i = batch->index;
-
-	/*
-	 * This can happen when we are in the middle of a TLB batch and
-	 * we encounter memory pressure (eg copy_page_range when it tries
-	 * to allocate a new pte). If we have to reclaim memory and end
-	 * up scanning and resetting referenced bits then our batch context
-	 * will change mid stream.
-	 */
-	if (i != 0 && (mm != batch->mm || batch->large != pte_huge(pte))) {
-		flush_tlb_pending();
-		i = 0;
-	}
-	if (i == 0) {
-		batch->mm = mm;
-		batch->large = pte_huge(pte);
-	}
-	if (addr < KERNELBASE) {
-		vsid = get_vsid(mm->context.id, addr);
-		WARN_ON(vsid == 0);
-	} else
-		vsid = get_kernel_vsid(addr);
-	batch->vaddr[i] = (vsid << 28 ) | (addr & 0x0fffffff);
-	batch->pte[i] = __pte(pte);
-	batch->index = ++i;
-	if (i >= PPC64_TLB_BATCH_NR)
-		flush_tlb_pending();
-}
-
-void __flush_tlb_pending(struct ppc64_tlb_batch *batch)
-{
-	int i;
-	int cpu;
-	cpumask_t tmp;
-	int local = 0;
-
-	BUG_ON(in_interrupt());
-
-	cpu = get_cpu();
-	i = batch->index;
-	tmp = cpumask_of_cpu(cpu);
-	if (cpus_equal(batch->mm->cpu_vm_mask, tmp))
-		local = 1;
-
-	if (i == 1)
-		flush_hash_page(batch->vaddr[0], batch->pte[0], local);
-	else
-		flush_hash_range(i, local);
-	batch->index = 0;
-	put_cpu();
-}
-
-void pte_free_finish(void)
-{
-	/* This is safe as we are holding page_table_lock */
-	struct pte_freelist_batch **batchp = &__get_cpu_var(pte_freelist_cur);
-
-	if (*batchp == NULL)
-		return;
-	pte_free_submit(*batchp);
-	*batchp = NULL;
-}