powerpc/mm: Move book3s32 specifics in subdirectory mm/book3s64

Several files in arch/powerpc/mm are only for book3S32. This patch
creates a subdirectory for them.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[mpe: Shorten new filenames]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 0 insertions, 118 deletions

diff --git a/arch/powerpc/mm/mmu_context_hash32.c b/arch/powerpc/mm/mmu_context_hash32.c
deleted file mode 100644
index 921c1e33e941..000000000000
--- a/arch/powerpc/mm/mmu_context_hash32.c
+++ /dev/null
@@ -1,118 +0,0 @@
-/*
- * This file contains the routines for handling the MMU on those
- * PowerPC implementations where the MMU substantially follows the
- * architecture specification.  This includes the 6xx, 7xx, 7xxx,
- * and 8260 implementations but excludes the 8xx and 4xx.
- *  -- 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
- *
- *  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/mm.h>
-#include <linux/init.h>
-#include <linux/export.h>
-
-#include <asm/mmu_context.h>
-
-/*
- * On 32-bit PowerPC 6xx/7xx/7xxx CPUs, we use a set of 16 VSIDs
- * (virtual segment identifiers) for each context.  Although the
- * hardware supports 24-bit VSIDs, and thus >1 million contexts,
- * we only use 32,768 of them.  That is ample, since there can be
- * at most around 30,000 tasks in the system anyway, and it means
- * that we can use a bitmap to indicate which contexts are in use.
- * Using a bitmap means that we entirely avoid all of the problems
- * that we used to have when the context number overflowed,
- * particularly on SMP systems.
- *  -- paulus.
- */
-#define NO_CONTEXT      	((unsigned long) -1)
-#define LAST_CONTEXT    	32767
-#define FIRST_CONTEXT    	1
-
-/*
- * This function defines the mapping from contexts to VSIDs (virtual
- * segment IDs).  We use a skew on both the context and the high 4 bits
- * of the 32-bit virtual address (the "effective segment ID") in order
- * to spread out the entries in the MMU hash table.  Note, if this
- * function is changed then arch/ppc/mm/hashtable.S will have to be
- * changed to correspond.
- *
- *
- * CTX_TO_VSID(ctx, va)	(((ctx) * (897 * 16) + ((va) >> 28) * 0x111) \
- *				 & 0xffffff)
- */
-
-static unsigned long next_mmu_context;
-static unsigned long context_map[LAST_CONTEXT / BITS_PER_LONG + 1];
-
-unsigned long __init_new_context(void)
-{
-	unsigned long ctx = next_mmu_context;
-
-	while (test_and_set_bit(ctx, context_map)) {
-		ctx = find_next_zero_bit(context_map, LAST_CONTEXT+1, ctx);
-		if (ctx > LAST_CONTEXT)
-			ctx = 0;
-	}
-	next_mmu_context = (ctx + 1) & LAST_CONTEXT;
-
-	return ctx;
-}
-EXPORT_SYMBOL_GPL(__init_new_context);
-
-/*
- * Set up the context for a new address space.
- */
-int init_new_context(struct task_struct *t, struct mm_struct *mm)
-{
-	mm->context.id = __init_new_context();
-
-	return 0;
-}
-
-/*
- * Free a context ID. Make sure to call this with preempt disabled!
- */
-void __destroy_context(unsigned long ctx)
-{
-	clear_bit(ctx, context_map);
-}
-EXPORT_SYMBOL_GPL(__destroy_context);
-
-/*
- * We're finished using the context for an address space.
- */
-void destroy_context(struct mm_struct *mm)
-{
-	preempt_disable();
-	if (mm->context.id != NO_CONTEXT) {
-		__destroy_context(mm->context.id);
-		mm->context.id = NO_CONTEXT;
-	}
-	preempt_enable();
-}
-
-/*
- * Initialize the context management stuff.
- */
-void __init mmu_context_init(void)
-{
-	/* Reserve context 0 for kernel use */
-	context_map[0] = (1 << FIRST_CONTEXT) - 1;
-	next_mmu_context = FIRST_CONTEXT;
-}