powerpc: Remove arch/ppc and include/asm-ppc

All the maintained platforms are now in arch/powerpc, so the old
arch/ppc stuff can now go away.

Acked-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Becky Bruce <becky.bruce@freescale.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Jochen Friedrich <jochen@scram.de>
Acked-by: John Linn <john.linn@xilinx.com>
Acked-by: Jon Loeliger <jdl@freescale.com>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Scott Wood <scottwood@freescale.com>
Acked-by: Sean MacLennan <smaclennan@pikatech.com>
Acked-by: Segher Boessenkool <segher@kernel.crashing.org>
Acked-by: Stefan Roese <sr@denx.de>
Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>

5 files changed, 0 insertions, 1209 deletions

diff --git a/arch/ppc/lib/Makefile b/arch/ppc/lib/Makefile
deleted file mode 100644
index 095e661e79dd..000000000000
--- a/arch/ppc/lib/Makefile
+++ /dev/null
@@ -1,5 +0,0 @@
-#
-# Makefile for ppc-specific library files..
-#
-
-obj-y			:= checksum.o string.o div64.o
diff --git a/arch/ppc/lib/checksum.S b/arch/ppc/lib/checksum.S
deleted file mode 100644
index 7874e8a80455..000000000000
--- a/arch/ppc/lib/checksum.S
+++ /dev/null
@@ -1,225 +0,0 @@
-/*
- * This file contains assembly-language implementations
- * of IP-style 1's complement checksum routines.
- *	
- *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- *  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.
- *
- * Severely hacked about by Paul Mackerras (paulus@cs.anu.edu.au).
- */
-
-#include <linux/sys.h>
-#include <asm/processor.h>
-#include <asm/errno.h>
-#include <asm/ppc_asm.h>
-
-	.text
-
-/*
- * ip_fast_csum(buf, len) -- Optimized for IP header
- * len is in words and is always >= 5.
- */
-_GLOBAL(ip_fast_csum)
-	lwz	r0,0(r3)
-	lwzu	r5,4(r3)
-	addic.	r4,r4,-2
-	addc	r0,r0,r5
-	mtctr	r4
-	blelr-
-1:	lwzu	r4,4(r3)
-	adde	r0,r0,r4
-	bdnz	1b
-	addze	r0,r0		/* add in final carry */
-	rlwinm	r3,r0,16,0,31	/* fold two halves together */
-	add	r3,r0,r3
-	not	r3,r3
-	srwi	r3,r3,16
-	blr
-
-/*
- * Compute checksum of TCP or UDP pseudo-header:
- *   csum_tcpudp_magic(saddr, daddr, len, proto, sum)
- */	
-_GLOBAL(csum_tcpudp_magic)
-	rlwimi	r5,r6,16,0,15	/* put proto in upper half of len */
-	addc	r0,r3,r4	/* add 4 32-bit words together */
-	adde	r0,r0,r5
-	adde	r0,r0,r7
-	addze	r0,r0		/* add in final carry */
-	rlwinm	r3,r0,16,0,31	/* fold two halves together */
-	add	r3,r0,r3
-	not	r3,r3
-	srwi	r3,r3,16
-	blr
-
-/*
- * computes the checksum of a memory block at buff, length len,
- * and adds in "sum" (32-bit)
- *
- * csum_partial(buff, len, sum)
- */
-_GLOBAL(csum_partial)
-	addic	r0,r5,0
-	subi	r3,r3,4
-	srwi.	r6,r4,2
-	beq	3f		/* if we're doing < 4 bytes */
-	andi.	r5,r3,2		/* Align buffer to longword boundary */
-	beq+	1f
-	lhz	r5,4(r3)	/* do 2 bytes to get aligned */
-	addi	r3,r3,2
-	subi	r4,r4,2
-	addc	r0,r0,r5
-	srwi.	r6,r4,2		/* # words to do */
-	beq	3f
-1:	mtctr	r6
-2:	lwzu	r5,4(r3)	/* the bdnz has zero overhead, so it should */
-	adde	r0,r0,r5	/* be unnecessary to unroll this loop */
-	bdnz	2b
-	andi.	r4,r4,3
-3:	cmpwi	0,r4,2
-	blt+	4f
-	lhz	r5,4(r3)
-	addi	r3,r3,2
-	subi	r4,r4,2
-	adde	r0,r0,r5
-4:	cmpwi	0,r4,1
-	bne+	5f
-	lbz	r5,4(r3)
-	slwi	r5,r5,8		/* Upper byte of word */
-	adde	r0,r0,r5
-5:	addze	r3,r0		/* add in final carry */
-	blr
-
-/*
- * Computes the checksum of a memory block at src, length len,
- * and adds in "sum" (32-bit), while copying the block to dst.
- * If an access exception occurs on src or dst, it stores -EFAULT
- * to *src_err or *dst_err respectively, and (for an error on
- * src) zeroes the rest of dst.
- *
- * csum_partial_copy_generic(src, dst, len, sum, src_err, dst_err)
- */
-_GLOBAL(csum_partial_copy_generic)
-	addic	r0,r6,0
-	subi	r3,r3,4
-	subi	r4,r4,4
-	srwi.	r6,r5,2
-	beq	3f		/* if we're doing < 4 bytes */
-	andi.	r9,r4,2		/* Align dst to longword boundary */
-	beq+	1f
-81:	lhz	r6,4(r3)	/* do 2 bytes to get aligned */
-	addi	r3,r3,2
-	subi	r5,r5,2
-91:	sth	r6,4(r4)
-	addi	r4,r4,2
-	addc	r0,r0,r6
-	srwi.	r6,r5,2		/* # words to do */
-	beq	3f
-1:	srwi.	r6,r5,4		/* # groups of 4 words to do */
-	beq	10f
-	mtctr	r6
-71:	lwz	r6,4(r3)
-72:	lwz	r9,8(r3)
-73:	lwz	r10,12(r3)
-74:	lwzu	r11,16(r3)
-	adde	r0,r0,r6
-75:	stw	r6,4(r4)
-	adde	r0,r0,r9
-76:	stw	r9,8(r4)
-	adde	r0,r0,r10
-77:	stw	r10,12(r4)
-	adde	r0,r0,r11
-78:	stwu	r11,16(r4)
-	bdnz	71b
-10:	rlwinm.	r6,r5,30,30,31	/* # words left to do */
-	beq	13f
-	mtctr	r6
-82:	lwzu	r9,4(r3)
-92:	stwu	r9,4(r4)
-	adde	r0,r0,r9
-	bdnz	82b
-13:	andi.	r5,r5,3
-3:	cmpwi	0,r5,2
-	blt+	4f
-83:	lhz	r6,4(r3)
-	addi	r3,r3,2
-	subi	r5,r5,2
-93:	sth	r6,4(r4)
-	addi	r4,r4,2
-	adde	r0,r0,r6
-4:	cmpwi	0,r5,1
-	bne+	5f
-84:	lbz	r6,4(r3)
-94:	stb	r6,4(r4)
-	slwi	r6,r6,8		/* Upper byte of word */
-	adde	r0,r0,r6
-5:	addze	r3,r0		/* add in final carry */
-	blr
-
-/* These shouldn't go in the fixup section, since that would
-   cause the ex_table addresses to get out of order. */
-
-src_error_4:
-	mfctr	r6		/* update # bytes remaining from ctr */
-	rlwimi	r5,r6,4,0,27
-	b	79f
-src_error_1:
-	li	r6,0
-	subi	r5,r5,2
-95:	sth	r6,4(r4)
-	addi	r4,r4,2
-79:	srwi.	r6,r5,2
-	beq	3f
-	mtctr	r6
-src_error_2:
-	li	r6,0
-96:	stwu	r6,4(r4)
-	bdnz	96b
-3:	andi.	r5,r5,3
-	beq	src_error
-src_error_3:
-	li	r6,0
-	mtctr	r5
-	addi	r4,r4,3
-97:	stbu	r6,1(r4)
-	bdnz	97b
-src_error:
-	cmpwi	0,r7,0
-	beq	1f
-	li	r6,-EFAULT
-	stw	r6,0(r7)
-1:	addze	r3,r0
-	blr
-
-dst_error:
-	cmpwi	0,r8,0
-	beq	1f
-	li	r6,-EFAULT
-	stw	r6,0(r8)
-1:	addze	r3,r0
-	blr
-
-.section __ex_table,"a"
-	.long	81b,src_error_1
-	.long	91b,dst_error
-	.long	71b,src_error_4
-	.long	72b,src_error_4
-	.long	73b,src_error_4
-	.long	74b,src_error_4
-	.long	75b,dst_error
-	.long	76b,dst_error
-	.long	77b,dst_error
-	.long	78b,dst_error
-	.long	82b,src_error_2
-	.long	92b,dst_error
-	.long	83b,src_error_3
-	.long	93b,dst_error
-	.long	84b,src_error_3
-	.long	94b,dst_error
-	.long	95b,dst_error
-	.long	96b,dst_error
-	.long	97b,dst_error
diff --git a/arch/ppc/lib/div64.S b/arch/ppc/lib/div64.S
deleted file mode 100644
index 3527569e9926..000000000000
--- a/arch/ppc/lib/div64.S
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- * Divide a 64-bit unsigned number by a 32-bit unsigned number.
- * This routine assumes that the top 32 bits of the dividend are
- * non-zero to start with.
- * On entry, r3 points to the dividend, which get overwritten with
- * the 64-bit quotient, and r4 contains the divisor.
- * On exit, r3 contains the remainder.
- *
- * Copyright (C) 2002 Paul Mackerras, IBM Corp.
- *
- * 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 <asm/ppc_asm.h>
-#include <asm/processor.h>
-
-_GLOBAL(__div64_32)
-	lwz	r5,0(r3)	# get the dividend into r5/r6
-	lwz	r6,4(r3)
-	cmplw	r5,r4
-	li	r7,0
-	li	r8,0
-	blt	1f
-	divwu	r7,r5,r4	# if dividend.hi >= divisor,
-	mullw	r0,r7,r4	# quotient.hi = dividend.hi / divisor
-	subf.	r5,r0,r5	# dividend.hi %= divisor
-	beq	3f
-1:	mr	r11,r5		# here dividend.hi != 0
-	andis.	r0,r5,0xc000
-	bne	2f
-	cntlzw	r0,r5		# we are shifting the dividend right
-	li	r10,-1		# to make it < 2^32, and shifting
-	srw	r10,r10,r0	# the divisor right the same amount,
-	add	r9,r4,r10	# rounding up (so the estimate cannot
-	andc	r11,r6,r10	# ever be too large, only too small)
-	andc	r9,r9,r10
-	or	r11,r5,r11
-	rotlw	r9,r9,r0
-	rotlw	r11,r11,r0
-	divwu	r11,r11,r9	# then we divide the shifted quantities
-2:	mullw	r10,r11,r4	# to get an estimate of the quotient,
-	mulhwu	r9,r11,r4	# multiply the estimate by the divisor,
-	subfc	r6,r10,r6	# take the product from the divisor,
-	add	r8,r8,r11	# and add the estimate to the accumulated
-	subfe.	r5,r9,r5	# quotient
-	bne	1b
-3:	cmplw	r6,r4
-	blt	4f
-	divwu	r0,r6,r4	# perform the remaining 32-bit division
-	mullw	r10,r0,r4	# and get the remainder
-	add	r8,r8,r0
-	subf	r6,r10,r6
-4:	stw	r7,0(r3)	# return the quotient in *r3
-	stw	r8,4(r3)
-	mr	r3,r6		# return the remainder in r3
-	blr
diff --git a/arch/ppc/lib/locks.c b/arch/ppc/lib/locks.c
deleted file mode 100644
index ea4aee6b20e6..000000000000
--- a/arch/ppc/lib/locks.c
+++ /dev/null
@@ -1,189 +0,0 @@
-/*
- * Locks for smp ppc
- *
- * Written by Cort Dougan (cort@cs.nmt.edu)
- */
-
-#include <linux/sched.h>
-#include <linux/spinlock.h>
-#include <linux/module.h>
-#include <asm/ppc_asm.h>
-#include <asm/smp.h>
-
-#ifdef CONFIG_DEBUG_SPINLOCK
-
-#undef INIT_STUCK
-#define INIT_STUCK 200000000 /*0xffffffff*/
-
-/*
- * Try to acquire a spinlock.
- * Only does the stwcx. if the load returned 0 - the Programming
- * Environments Manual suggests not doing unnecessary stcwx.'s
- * since they may inhibit forward progress by other CPUs in getting
- * a lock.
- */
-static inline unsigned long __spin_trylock(volatile unsigned long *lock)
-{
-	unsigned long ret;
-
-	__asm__ __volatile__ ("\n\
-1:	lwarx	%0,0,%1\n\
-	cmpwi	0,%0,0\n\
-	bne	2f\n"
-	PPC405_ERR77(0,%1)
-"	stwcx.	%2,0,%1\n\
-	bne-	1b\n\
-	isync\n\
-2:"
-	: "=&r"(ret)
-	: "r"(lock), "r"(1)
-	: "cr0", "memory");
-
-	return ret;
-}
-
-void _raw_spin_lock(spinlock_t *lock)
-{
-	int cpu = smp_processor_id();
-	unsigned int stuck = INIT_STUCK;
-	while (__spin_trylock(&lock->lock)) {
-		while ((unsigned volatile long)lock->lock != 0) {
-			if (!--stuck) {
-				printk("_spin_lock(%p) CPU#%d NIP %p"
-				       " holder: cpu %ld pc %08lX\n",
-				       lock, cpu, __builtin_return_address(0),
-				       lock->owner_cpu,lock->owner_pc);
-				stuck = INIT_STUCK;
-				/* steal the lock */
-				/*xchg_u32((void *)&lock->lock,0);*/
-			}
-		}
-	}
-	lock->owner_pc = (unsigned long)__builtin_return_address(0);
-	lock->owner_cpu = cpu;
-}
-EXPORT_SYMBOL(_raw_spin_lock);
-
-int _raw_spin_trylock(spinlock_t *lock)
-{
-	if (__spin_trylock(&lock->lock))
-		return 0;
-	lock->owner_cpu = smp_processor_id();
-	lock->owner_pc = (unsigned long)__builtin_return_address(0);
-	return 1;
-}
-EXPORT_SYMBOL(_raw_spin_trylock);
-
-void _raw_spin_unlock(spinlock_t *lp)
-{
-  	if ( !lp->lock )
-		printk("_spin_unlock(%p): no lock cpu %d curr PC %p %s/%d\n",
-		       lp, smp_processor_id(), __builtin_return_address(0),
-		       current->comm, current->pid);
-	if ( lp->owner_cpu != smp_processor_id() )
-		printk("_spin_unlock(%p): cpu %d trying clear of cpu %d pc %lx val %lx\n",
-		      lp, smp_processor_id(), (int)lp->owner_cpu,
-		      lp->owner_pc,lp->lock);
-	lp->owner_pc = lp->owner_cpu = 0;
-	wmb();
-	lp->lock = 0;
-}
-EXPORT_SYMBOL(_raw_spin_unlock);
-
-/*
- * For rwlocks, zero is unlocked, -1 is write-locked,
- * positive is read-locked.
- */
-static __inline__ int __read_trylock(rwlock_t *rw)
-{
-	signed int tmp;
-
-	__asm__ __volatile__(
-"2:	lwarx	%0,0,%1		# __read_trylock\n\
-	addic.	%0,%0,1\n\
-	ble-	1f\n"
-	PPC405_ERR77(0,%1)
-"	stwcx.	%0,0,%1\n\
-	bne-	2b\n\
-	isync\n\
-1:"
-	: "=&r"(tmp)
-	: "r"(&rw->lock)
-	: "cr0", "memory");
-
-	return tmp;
-}
-
-int _raw_read_trylock(rwlock_t *rw)
-{
-	return __read_trylock(rw) > 0;
-}
-EXPORT_SYMBOL(_raw_read_trylock);
-
-void _raw_read_lock(rwlock_t *rw)
-{
-	unsigned int stuck;
-
-	while (__read_trylock(rw) <= 0) {
-		stuck = INIT_STUCK;
-		while (!read_can_lock(rw)) {
-			if (--stuck == 0) {
-				printk("_read_lock(%p) CPU#%d lock %d\n",
-				       rw, raw_smp_processor_id(), rw->lock);
-				stuck = INIT_STUCK;
-			}
-		}
-	}
-}
-EXPORT_SYMBOL(_raw_read_lock);
-
-void _raw_read_unlock(rwlock_t *rw)
-{
-	if ( rw->lock == 0 )
-		printk("_read_unlock(): %s/%d (nip %08lX) lock %d\n",
-		       current->comm,current->pid,current->thread.regs->nip,
-		      rw->lock);
-	wmb();
-	atomic_dec((atomic_t *) &(rw)->lock);
-}
-EXPORT_SYMBOL(_raw_read_unlock);
-
-void _raw_write_lock(rwlock_t *rw)
-{
-	unsigned int stuck;
-
-	while (cmpxchg(&rw->lock, 0, -1) != 0) {
-		stuck = INIT_STUCK;
-		while (!write_can_lock(rw)) {
-			if (--stuck == 0) {
-				printk("write_lock(%p) CPU#%d lock %d)\n",
-				       rw, raw_smp_processor_id(), rw->lock);
-				stuck = INIT_STUCK;
-			}
-		}
-	}
-	wmb();
-}
-EXPORT_SYMBOL(_raw_write_lock);
-
-int _raw_write_trylock(rwlock_t *rw)
-{
-	if (cmpxchg(&rw->lock, 0, -1) != 0)
-		return 0;
-	wmb();
-	return 1;
-}
-EXPORT_SYMBOL(_raw_write_trylock);
-
-void _raw_write_unlock(rwlock_t *rw)
-{
-	if (rw->lock >= 0)
-		printk("_write_lock(): %s/%d (nip %08lX) lock %d\n",
-		      current->comm,current->pid,current->thread.regs->nip,
-		      rw->lock);
-	wmb();
-	rw->lock = 0;
-}
-EXPORT_SYMBOL(_raw_write_unlock);
-
-#endif
diff --git a/arch/ppc/lib/string.S b/arch/ppc/lib/string.S
deleted file mode 100644
index 927253bfc826..000000000000
--- a/arch/ppc/lib/string.S
+++ /dev/null
@@ -1,732 +0,0 @@
-/*
- * String handling functions for PowerPC.
- *
- * Copyright (C) 1996 Paul Mackerras.
- *
- * 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 <asm/processor.h>
-#include <asm/cache.h>
-#include <asm/errno.h>
-#include <asm/ppc_asm.h>
-
-#define COPY_16_BYTES		\
-	lwz	r7,4(r4);	\
-	lwz	r8,8(r4);	\
-	lwz	r9,12(r4);	\
-	lwzu	r10,16(r4);	\
-	stw	r7,4(r6);	\
-	stw	r8,8(r6);	\
-	stw	r9,12(r6);	\
-	stwu	r10,16(r6)
-
-#define COPY_16_BYTES_WITHEX(n)	\
-8 ## n ## 0:			\
-	lwz	r7,4(r4);	\
-8 ## n ## 1:			\
-	lwz	r8,8(r4);	\
-8 ## n ## 2:			\
-	lwz	r9,12(r4);	\
-8 ## n ## 3:			\
-	lwzu	r10,16(r4);	\
-8 ## n ## 4:			\
-	stw	r7,4(r6);	\
-8 ## n ## 5:			\
-	stw	r8,8(r6);	\
-8 ## n ## 6:			\
-	stw	r9,12(r6);	\
-8 ## n ## 7:			\
-	stwu	r10,16(r6)
-
-#define COPY_16_BYTES_EXCODE(n)			\
-9 ## n ## 0:					\
-	addi	r5,r5,-(16 * n);		\
-	b	104f;				\
-9 ## n ## 1:					\
-	addi	r5,r5,-(16 * n);		\
-	b	105f;				\
-.section __ex_table,"a";			\
-	.align	2;				\
-	.long	8 ## n ## 0b,9 ## n ## 0b;	\
-	.long	8 ## n ## 1b,9 ## n ## 0b;	\
-	.long	8 ## n ## 2b,9 ## n ## 0b;	\
-	.long	8 ## n ## 3b,9 ## n ## 0b;	\
-	.long	8 ## n ## 4b,9 ## n ## 1b;	\
-	.long	8 ## n ## 5b,9 ## n ## 1b;	\
-	.long	8 ## n ## 6b,9 ## n ## 1b;	\
-	.long	8 ## n ## 7b,9 ## n ## 1b;	\
-	.text
-
-	.text
-	.stabs	"arch/ppc/lib/",N_SO,0,0,0f
-	.stabs	"string.S",N_SO,0,0,0f
-
-CACHELINE_BYTES = L1_CACHE_BYTES
-LG_CACHELINE_BYTES = L1_CACHE_SHIFT
-CACHELINE_MASK = (L1_CACHE_BYTES-1)
-
-_GLOBAL(strcpy)
-	addi	r5,r3,-1
-	addi	r4,r4,-1
-1:	lbzu	r0,1(r4)
-	cmpwi	0,r0,0
-	stbu	r0,1(r5)
-	bne	1b
-	blr
-
-/* This clears out any unused part of the destination buffer,
-   just as the libc version does.  -- paulus */
-_GLOBAL(strncpy)
-	cmpwi	0,r5,0
-	beqlr
-	mtctr	r5
-	addi	r6,r3,-1
-	addi	r4,r4,-1
-1:	lbzu	r0,1(r4)
-	cmpwi	0,r0,0
-	stbu	r0,1(r6)
-	bdnzf	2,1b		/* dec ctr, branch if ctr != 0 && !cr0.eq */
-	bnelr			/* if we didn't hit a null char, we're done */
-	mfctr	r5
-	cmpwi	0,r5,0		/* any space left in destination buffer? */
-	beqlr			/* we know r0 == 0 here */
-2:	stbu	r0,1(r6)	/* clear it out if so */
-	bdnz	2b
-	blr
-
-_GLOBAL(strcat)
-	addi	r5,r3,-1
-	addi	r4,r4,-1
-1:	lbzu	r0,1(r5)
-	cmpwi	0,r0,0
-	bne	1b
-	addi	r5,r5,-1
-1:	lbzu	r0,1(r4)
-	cmpwi	0,r0,0
-	stbu	r0,1(r5)
-	bne	1b
-	blr
-
-_GLOBAL(strcmp)
-	addi	r5,r3,-1
-	addi	r4,r4,-1
-1:	lbzu	r3,1(r5)
-	cmpwi	1,r3,0
-	lbzu	r0,1(r4)
-	subf.	r3,r0,r3
-	beqlr	1
-	beq	1b
-	blr
-
-_GLOBAL(strncmp)
-	PPC_LCMPI r5,0
-	beqlr
-	mtctr	r5
-	addi	r5,r3,-1
-	addi	r4,r4,-1
-1:	lbzu	r3,1(r5)
-	cmpwi	1,r3,0
-	lbzu	r0,1(r4)
-	subf.	r3,r0,r3
-	beqlr	1
-	bdnzt	eq,1b
-	blr
-
-_GLOBAL(strlen)
-	addi	r4,r3,-1
-1:	lbzu	r0,1(r4)
-	cmpwi	0,r0,0
-	bne	1b
-	subf	r3,r3,r4
-	blr
-
-/*
- * Use dcbz on the complete cache lines in the destination
- * to set them to zero.  This requires that the destination
- * area is cacheable.  -- paulus
- */
-_GLOBAL(cacheable_memzero)
-	mr	r5,r4
-	li	r4,0
-	addi	r6,r3,-4
-	cmplwi	0,r5,4
-	blt	7f
-	stwu	r4,4(r6)
-	beqlr
-	andi.	r0,r6,3
-	add	r5,r0,r5
-	subf	r6,r0,r6
-	clrlwi	r7,r6,32-LG_CACHELINE_BYTES
-	add	r8,r7,r5
-	srwi	r9,r8,LG_CACHELINE_BYTES
-	addic.	r9,r9,-1	/* total number of complete cachelines */
-	ble	2f
-	xori	r0,r7,CACHELINE_MASK & ~3
-	srwi.	r0,r0,2
-	beq	3f
-	mtctr	r0
-4:	stwu	r4,4(r6)
-	bdnz	4b
-3:	mtctr	r9
-	li	r7,4
-#if !defined(CONFIG_8xx)
-10:	dcbz	r7,r6
-#else
-10:	stw	r4, 4(r6)
-	stw	r4, 8(r6)
-	stw	r4, 12(r6)
-	stw	r4, 16(r6)
-#if CACHE_LINE_SIZE >= 32
-	stw	r4, 20(r6)
-	stw	r4, 24(r6)
-	stw	r4, 28(r6)
-	stw	r4, 32(r6)
-#endif /* CACHE_LINE_SIZE */
-#endif
-	addi	r6,r6,CACHELINE_BYTES
-	bdnz	10b
-	clrlwi	r5,r8,32-LG_CACHELINE_BYTES
-	addi	r5,r5,4
-2:	srwi	r0,r5,2
-	mtctr	r0
-	bdz	6f
-1:	stwu	r4,4(r6)
-	bdnz	1b
-6:	andi.	r5,r5,3
-7:	cmpwi	0,r5,0
-	beqlr
-	mtctr	r5
-	addi	r6,r6,3
-8:	stbu	r4,1(r6)
-	bdnz	8b
-	blr
-
-_GLOBAL(memset)
-	rlwimi	r4,r4,8,16,23
-	rlwimi	r4,r4,16,0,15
-	addi	r6,r3,-4
-	cmplwi	0,r5,4
-	blt	7f
-	stwu	r4,4(r6)
-	beqlr
-	andi.	r0,r6,3
-	add	r5,r0,r5
-	subf	r6,r0,r6
-	srwi	r0,r5,2
-	mtctr	r0
-	bdz	6f
-1:	stwu	r4,4(r6)
-	bdnz	1b
-6:	andi.	r5,r5,3
-7:	cmpwi	0,r5,0
-	beqlr
-	mtctr	r5
-	addi	r6,r6,3
-8:	stbu	r4,1(r6)
-	bdnz	8b
-	blr
-
-/*
- * This version uses dcbz on the complete cache lines in the
- * destination area to reduce memory traffic.  This requires that
- * the destination area is cacheable.
- * We only use this version if the source and dest don't overlap.
- * -- paulus.
- */
-_GLOBAL(cacheable_memcpy)
-	add	r7,r3,r5		/* test if the src & dst overlap */
-	add	r8,r4,r5
-	cmplw	0,r4,r7
-	cmplw	1,r3,r8
-	crand	0,0,4			/* cr0.lt &= cr1.lt */
-	blt	memcpy			/* if regions overlap */
-
-	addi	r4,r4,-4
-	addi	r6,r3,-4
-	neg	r0,r3
-	andi.	r0,r0,CACHELINE_MASK	/* # bytes to start of cache line */
-	beq	58f
-
-	cmplw	0,r5,r0			/* is this more than total to do? */
-	blt	63f			/* if not much to do */
-	andi.	r8,r0,3			/* get it word-aligned first */
-	subf	r5,r0,r5
-	mtctr	r8
-	beq+	61f
-70:	lbz	r9,4(r4)		/* do some bytes */
-	stb	r9,4(r6)
-	addi	r4,r4,1
-	addi	r6,r6,1
-	bdnz	70b
-61:	srwi.	r0,r0,2
-	mtctr	r0
-	beq	58f
-72:	lwzu	r9,4(r4)		/* do some words */
-	stwu	r9,4(r6)
-	bdnz	72b
-
-58:	srwi.	r0,r5,LG_CACHELINE_BYTES /* # complete cachelines */
-	clrlwi	r5,r5,32-LG_CACHELINE_BYTES
-	li	r11,4
-	mtctr	r0
-	beq	63f
-53:
-#if !defined(CONFIG_8xx)
-	dcbz	r11,r6
-#endif
-	COPY_16_BYTES
-#if L1_CACHE_BYTES >= 32
-	COPY_16_BYTES
-#if L1_CACHE_BYTES >= 64
-	COPY_16_BYTES
-	COPY_16_BYTES
-#if L1_CACHE_BYTES >= 128
-	COPY_16_BYTES
-	COPY_16_BYTES
-	COPY_16_BYTES
-	COPY_16_BYTES
-#endif
-#endif
-#endif
-	bdnz	53b
-
-63:	srwi.	r0,r5,2
-	mtctr	r0
-	beq	64f
-30:	lwzu	r0,4(r4)
-	stwu	r0,4(r6)
-	bdnz	30b
-
-64:	andi.	r0,r5,3
-	mtctr	r0
-	beq+	65f
-40:	lbz	r0,4(r4)
-	stb	r0,4(r6)
-	addi	r4,r4,1
-	addi	r6,r6,1
-	bdnz	40b
-65:	blr
-
-_GLOBAL(memmove)
-	cmplw	0,r3,r4
-	bgt	backwards_memcpy
-	/* fall through */
-
-_GLOBAL(memcpy)
-	srwi.	r7,r5,3
-	addi	r6,r3,-4
-	addi	r4,r4,-4
-	beq	2f			/* if less than 8 bytes to do */
-	andi.	r0,r6,3			/* get dest word aligned */
-	mtctr	r7
-	bne	5f
-1:	lwz	r7,4(r4)
-	lwzu	r8,8(r4)
-	stw	r7,4(r6)
-	stwu	r8,8(r6)
-	bdnz	1b
-	andi.	r5,r5,7
-2:	cmplwi	0,r5,4
-	blt	3f
-	lwzu	r0,4(r4)
-	addi	r5,r5,-4
-	stwu	r0,4(r6)
-3:	cmpwi	0,r5,0
-	beqlr
-	mtctr	r5
-	addi	r4,r4,3
-	addi	r6,r6,3
-4:	lbzu	r0,1(r4)
-	stbu	r0,1(r6)
-	bdnz	4b
-	blr
-5:	subfic	r0,r0,4
-	mtctr	r0
-6:	lbz	r7,4(r4)
-	addi	r4,r4,1
-	stb	r7,4(r6)
-	addi	r6,r6,1
-	bdnz	6b
-	subf	r5,r0,r5
-	rlwinm.	r7,r5,32-3,3,31
-	beq	2b
-	mtctr	r7
-	b	1b
-
-_GLOBAL(backwards_memcpy)
-	rlwinm.	r7,r5,32-3,3,31		/* r0 = r5 >> 3 */
-	add	r6,r3,r5
-	add	r4,r4,r5
-	beq	2f
-	andi.	r0,r6,3
-	mtctr	r7
-	bne	5f
-1:	lwz	r7,-4(r4)
-	lwzu	r8,-8(r4)
-	stw	r7,-4(r6)
-	stwu	r8,-8(r6)
-	bdnz	1b
-	andi.	r5,r5,7
-2:	cmplwi	0,r5,4
-	blt	3f
-	lwzu	r0,-4(r4)
-	subi	r5,r5,4
-	stwu	r0,-4(r6)
-3:	cmpwi	0,r5,0
-	beqlr
-	mtctr	r5
-4:	lbzu	r0,-1(r4)
-	stbu	r0,-1(r6)
-	bdnz	4b
-	blr
-5:	mtctr	r0
-6:	lbzu	r7,-1(r4)
-	stbu	r7,-1(r6)
-	bdnz	6b
-	subf	r5,r0,r5
-	rlwinm.	r7,r5,32-3,3,31
-	beq	2b
-	mtctr	r7
-	b	1b
-
-_GLOBAL(memcmp)
-	cmpwi	0,r5,0
-	ble-	2f
-	mtctr	r5
-	addi	r6,r3,-1
-	addi	r4,r4,-1
-1:	lbzu	r3,1(r6)
-	lbzu	r0,1(r4)
-	subf.	r3,r0,r3
-	bdnzt	2,1b
-	blr
-2:	li	r3,0
-	blr
-
-_GLOBAL(memchr)
-	cmpwi	0,r5,0
-	ble-	2f
-	mtctr	r5
-	addi	r3,r3,-1
-1:	lbzu	r0,1(r3)
-	cmpw	0,r0,r4
-	bdnzf	2,1b
-	beqlr
-2:	li	r3,0
-	blr
-
-_GLOBAL(__copy_tofrom_user)
-	addi	r4,r4,-4
-	addi	r6,r3,-4
-	neg	r0,r3
-	andi.	r0,r0,CACHELINE_MASK	/* # bytes to start of cache line */
-	beq	58f
-
-	cmplw	0,r5,r0			/* is this more than total to do? */
-	blt	63f			/* if not much to do */
-	andi.	r8,r0,3			/* get it word-aligned first */
-	mtctr	r8
-	beq+	61f
-70:	lbz	r9,4(r4)		/* do some bytes */
-71:	stb	r9,4(r6)
-	addi	r4,r4,1
-	addi	r6,r6,1
-	bdnz	70b
-61:	subf	r5,r0,r5
-	srwi.	r0,r0,2
-	mtctr	r0
-	beq	58f
-72:	lwzu	r9,4(r4)		/* do some words */
-73:	stwu	r9,4(r6)
-	bdnz	72b
-
-	.section __ex_table,"a"
-	.align	2
-	.long	70b,100f
-	.long	71b,101f
-	.long	72b,102f
-	.long	73b,103f
-	.text
-
-58:	srwi.	r0,r5,LG_CACHELINE_BYTES /* # complete cachelines */
-	clrlwi	r5,r5,32-LG_CACHELINE_BYTES
-	li	r11,4
-	beq	63f
-
-#ifdef CONFIG_8xx
-	/* Don't use prefetch on 8xx */
-	mtctr	r0
-	li	r0,0
-53:	COPY_16_BYTES_WITHEX(0)
-	bdnz	53b
-
-#else /* not CONFIG_8xx */
-	/* Here we decide how far ahead to prefetch the source */
-	li	r3,4
-	cmpwi	r0,1
-	li	r7,0
-	ble	114f
-	li	r7,1
-#if MAX_COPY_PREFETCH > 1
-	/* Heuristically, for large transfers we prefetch
-	   MAX_COPY_PREFETCH cachelines ahead.  For small transfers
-	   we prefetch 1 cacheline ahead. */
-	cmpwi	r0,MAX_COPY_PREFETCH
-	ble	112f
-	li	r7,MAX_COPY_PREFETCH
-112:	mtctr	r7
-111:	dcbt	r3,r4
-	addi	r3,r3,CACHELINE_BYTES
-	bdnz	111b
-#else
-	dcbt	r3,r4
-	addi	r3,r3,CACHELINE_BYTES
-#endif /* MAX_COPY_PREFETCH > 1 */
-
-114:	subf	r8,r7,r0
-	mr	r0,r7
-	mtctr	r8
-
-53:	dcbt	r3,r4
-54:	dcbz	r11,r6
-	.section __ex_table,"a"
-	.align	2
-	.long	54b,105f
-	.text
-/* the main body of the cacheline loop */
-	COPY_16_BYTES_WITHEX(0)
-#if L1_CACHE_BYTES >= 32
-	COPY_16_BYTES_WITHEX(1)
-#if L1_CACHE_BYTES >= 64
-	COPY_16_BYTES_WITHEX(2)
-	COPY_16_BYTES_WITHEX(3)
-#if L1_CACHE_BYTES >= 128
-	COPY_16_BYTES_WITHEX(4)
-	COPY_16_BYTES_WITHEX(5)
-	COPY_16_BYTES_WITHEX(6)
-	COPY_16_BYTES_WITHEX(7)
-#endif
-#endif
-#endif
-	bdnz	53b
-	cmpwi	r0,0
-	li	r3,4
-	li	r7,0
-	bne	114b
-#endif /* CONFIG_8xx */
-
-63:	srwi.	r0,r5,2
-	mtctr	r0
-	beq	64f
-30:	lwzu	r0,4(r4)
-31:	stwu	r0,4(r6)
-	bdnz	30b
-
-64:	andi.	r0,r5,3
-	mtctr	r0
-	beq+	65f
-40:	lbz	r0,4(r4)
-41:	stb	r0,4(r6)
-	addi	r4,r4,1
-	addi	r6,r6,1
-	bdnz	40b
-65:	li	r3,0
-	blr
-
-/* read fault, initial single-byte copy */
-100:	li	r9,0
-	b	90f
-/* write fault, initial single-byte copy */
-101:	li	r9,1
-90:	subf	r5,r8,r5
-	li	r3,0
-	b	99f
-/* read fault, initial word copy */
-102:	li	r9,0
-	b	91f
-/* write fault, initial word copy */
-103:	li	r9,1
-91:	li	r3,2
-	b	99f
-
-/*
- * this stuff handles faults in the cacheline loop and branches to either
- * 104f (if in read part) or 105f (if in write part), after updating r5
- */
-	COPY_16_BYTES_EXCODE(0)
-#if L1_CACHE_BYTES >= 32
-	COPY_16_BYTES_EXCODE(1)
-#if L1_CACHE_BYTES >= 64
-	COPY_16_BYTES_EXCODE(2)
-	COPY_16_BYTES_EXCODE(3)
-#if L1_CACHE_BYTES >= 128
-	COPY_16_BYTES_EXCODE(4)
-	COPY_16_BYTES_EXCODE(5)
-	COPY_16_BYTES_EXCODE(6)
-	COPY_16_BYTES_EXCODE(7)
-#endif
-#endif
-#endif
-
-/* read fault in cacheline loop */
-104:	li	r9,0
-	b	92f
-/* fault on dcbz (effectively a write fault) */
-/* or write fault in cacheline loop */
-105:	li	r9,1
-92:	li	r3,LG_CACHELINE_BYTES
-	mfctr	r8
-	add	r0,r0,r8
-	b	106f
-/* read fault in final word loop */
-108:	li	r9,0
-	b	93f
-/* write fault in final word loop */
-109:	li	r9,1
-93:	andi.	r5,r5,3
-	li	r3,2
-	b	99f
-/* read fault in final byte loop */
-110:	li	r9,0
-	b	94f
-/* write fault in final byte loop */
-111:	li	r9,1
-94:	li	r5,0
-	li	r3,0
-/*
- * At this stage the number of bytes not copied is
- * r5 + (ctr << r3), and r9 is 0 for read or 1 for write.
- */
-99:	mfctr	r0
-106:	slw	r3,r0,r3
-	add.	r3,r3,r5
-	beq	120f			/* shouldn't happen */
-	cmpwi	0,r9,0
-	bne	120f
-/* for a read fault, first try to continue the copy one byte at a time */
-	mtctr	r3
-130:	lbz	r0,4(r4)
-131:	stb	r0,4(r6)
-	addi	r4,r4,1
-	addi	r6,r6,1
-	bdnz	130b
-/* then clear out the destination: r3 bytes starting at 4(r6) */
-132:	mfctr	r3
-	srwi.	r0,r3,2
-	li	r9,0
-	mtctr	r0
-	beq	113f
-112:	stwu	r9,4(r6)
-	bdnz	112b
-113:	andi.	r0,r3,3
-	mtctr	r0
-	beq	120f
-114:	stb	r9,4(r6)
-	addi	r6,r6,1
-	bdnz	114b
-120:	blr
-
-	.section __ex_table,"a"
-	.align	2
-	.long	30b,108b
-	.long	31b,109b
-	.long	40b,110b
-	.long	41b,111b
-	.long	130b,132b
-	.long	131b,120b
-	.long	112b,120b
-	.long	114b,120b
-	.text
-
-_GLOBAL(__clear_user)
-	addi	r6,r3,-4
-	li	r3,0
-	li	r5,0
-	cmplwi	0,r4,4
-	blt	7f
-	/* clear a single word */
-11:	stwu	r5,4(r6)
-	beqlr
-	/* clear word sized chunks */
-	andi.	r0,r6,3
-	add	r4,r0,r4
-	subf	r6,r0,r6
-	srwi	r0,r4,2
-	andi.	r4,r4,3
-	mtctr	r0
-	bdz	7f
-1:	stwu	r5,4(r6)
-	bdnz	1b
-	/* clear byte sized chunks */
-7:	cmpwi	0,r4,0
-	beqlr
-	mtctr	r4
-	addi	r6,r6,3
-8:	stbu	r5,1(r6)
-	bdnz	8b
-	blr
-90:	mr	r3,r4
-	blr
-91:	mfctr	r3
-	slwi	r3,r3,2
-	add	r3,r3,r4
-	blr
-92:	mfctr	r3
-	blr
-
-	.section __ex_table,"a"
-	.align	2
-	.long	11b,90b
-	.long	1b,91b
-	.long	8b,92b
-	.text
-
-_GLOBAL(__strncpy_from_user)
-	addi	r6,r3,-1
-	addi	r4,r4,-1
-	cmpwi	0,r5,0
-	beq	2f
-	mtctr	r5
-1:	lbzu	r0,1(r4)
-	cmpwi	0,r0,0
-	stbu	r0,1(r6)
-	bdnzf	2,1b		/* dec ctr, branch if ctr != 0 && !cr0.eq */
-	beq	3f
-2:	addi	r6,r6,1
-3:	subf	r3,r3,r6
-	blr
-99:	li	r3,-EFAULT
-	blr
-
-	.section __ex_table,"a"
-	.align	2
-	.long	1b,99b
-	.text
-
-/* r3 = str, r4 = len (> 0), r5 = top (highest addr) */
-_GLOBAL(__strnlen_user)
-	addi	r7,r3,-1
-	subf	r6,r7,r5	/* top+1 - str */
-	cmplw	0,r4,r6
-	bge	0f
-	mr	r6,r4
-0:	mtctr	r6		/* ctr = min(len, top - str) */
-1:	lbzu	r0,1(r7)	/* get next byte */
-	cmpwi	0,r0,0
-	bdnzf	2,1b		/* loop if --ctr != 0 && byte != 0 */
-	addi	r7,r7,1
-	subf	r3,r3,r7	/* number of bytes we have looked at */
-	beqlr			/* return if we found a 0 byte */
-	cmpw	0,r3,r4		/* did we look at all len bytes? */
-	blt	99f		/* if not, must have hit top */
-	addi	r3,r4,1		/* return len + 1 to indicate no null found */
-	blr
-99:	li	r3,0		/* bad address, return 0 */
-	blr
-
-	.section __ex_table,"a"
-	.align	2
-	.long	1b,99b