kernel: Move arches to use common unaligned access

Unaligned access is ok for the following arches:
cris, m68k, mn10300, powerpc, s390, x86

Arches that use the memmove implementation for native endian, and
the byteshifting for the opposite endianness.
h8300, m32r, xtensa

Packed struct for native endian, byteshifting for other endian:
alpha, blackfin, ia64, parisc, sparc, sparc64, mips, sh

m86knommu is generic_be for Coldfire, otherwise unaligned access is ok.

frv, arm chooses endianness based on compiler settings, uses the byteshifting
versions.  Remove the unaligned trap handler from frv as it is now unused.

v850 is le, uses the byteshifting versions for both be and le.

Remove the now unused asm-generic implementation.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

26 files changed, 203 insertions, 1115 deletions

diff --git a/arch/frv/kernel/traps.c b/arch/frv/kernel/traps.c
index a40df80b2ebd..1d2dfe67d442 100644
--- a/arch/frv/kernel/traps.c
+++ b/arch/frv/kernel/traps.c
@@ -362,11 +362,8 @@ asmlinkage void memory_access_exception(unsigned long esr0,
 #ifdef CONFIG_MMU
         unsigned long fixup;
 
-        if ((esr0 & ESRx_EC) == ESRx_EC_DATA_ACCESS)
-                if (handle_misalignment(esr0, ear0, epcr0) == 0)
-                        return;
-
-        if ((fixup = search_exception_table(__frame->pc)) != 0) {
+        fixup = search_exception_table(__frame->pc);
+        if (fixup) {
                 __frame->pc = fixup;
                 return;
         }
diff --git a/arch/frv/mm/unaligned.c b/arch/frv/mm/unaligned.c
deleted file mode 100644
index 8f0375fc15a8..000000000000
--- a/arch/frv/mm/unaligned.c
+++ /dev/null
@@ -1,217 +0,0 @@
-/* unaligned.c: unalignment fixup handler for CPUs on which it is supported (FR451 only)
- *
- * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * 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/sched.h>
-#include <linux/signal.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/types.h>
-#include <linux/user.h>
-#include <linux/string.h>
-#include <linux/linkage.h>
-#include <linux/init.h>
-
-#include <asm/setup.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
-
-#if 0
-#define kdebug(fmt, ...) printk("FDPIC "fmt"\n" ,##__VA_ARGS__ )
-#else
-#define kdebug(fmt, ...) do {} while(0)
-#endif
-
-#define _MA_SIGNED      0x01
-#define _MA_HALF        0x02
-#define _MA_WORD        0x04
-#define _MA_DWORD       0x08
-#define _MA_SZ_MASK     0x0e
-#define _MA_LOAD        0x10
-#define _MA_STORE       0x20
-#define _MA_UPDATE      0x40
-#define _MA_IMM         0x80
-
-#define _MA_LDxU        _MA_LOAD | _MA_UPDATE
-#define _MA_LDxI        _MA_LOAD | _MA_IMM
-#define _MA_STxU        _MA_STORE | _MA_UPDATE
-#define _MA_STxI        _MA_STORE | _MA_IMM
-
-static const uint8_t tbl_LDGRk_reg[0x40] = {
-        [0x02] = _MA_LOAD | _MA_HALF | _MA_SIGNED,      /* LDSH  @(GRi,GRj),GRk */
-        [0x03] = _MA_LOAD | _MA_HALF,                   /* LDUH  @(GRi,GRj),GRk */
-        [0x04] = _MA_LOAD | _MA_WORD,                   /* LD    @(GRi,GRj),GRk */
-        [0x05] = _MA_LOAD | _MA_DWORD,                  /* LDD   @(GRi,GRj),GRk */
-        [0x12] = _MA_LDxU | _MA_HALF | _MA_SIGNED,      /* LDSHU @(GRi,GRj),GRk */
-        [0x13] = _MA_LDxU | _MA_HALF,                   /* LDUHU @(GRi,GRj),GRk */
-        [0x14] = _MA_LDxU | _MA_WORD,                   /* LDU   @(GRi,GRj),GRk */
-        [0x15] = _MA_LDxU | _MA_DWORD,                  /* LDDU  @(GRi,GRj),GRk */
-};
-
-static const uint8_t tbl_STGRk_reg[0x40] = {
-        [0x01] = _MA_STORE | _MA_HALF,                  /* STH   @(GRi,GRj),GRk */
-        [0x02] = _MA_STORE | _MA_WORD,                  /* ST    @(GRi,GRj),GRk */
-        [0x03] = _MA_STORE | _MA_DWORD,                 /* STD   @(GRi,GRj),GRk */
-        [0x11] = _MA_STxU  | _MA_HALF,                  /* STHU  @(GRi,GRj),GRk */
-        [0x12] = _MA_STxU  | _MA_WORD,                  /* STU   @(GRi,GRj),GRk */
-        [0x13] = _MA_STxU  | _MA_DWORD,                 /* STDU  @(GRi,GRj),GRk */
-};
-
-static const uint8_t tbl_LDSTGRk_imm[0x80] = {
-        [0x31] = _MA_LDxI | _MA_HALF | _MA_SIGNED,      /* LDSHI @(GRi,d12),GRk */
-        [0x32] = _MA_LDxI | _MA_WORD,                   /* LDI   @(GRi,d12),GRk */
-        [0x33] = _MA_LDxI | _MA_DWORD,                  /* LDDI  @(GRi,d12),GRk */
-        [0x36] = _MA_LDxI | _MA_HALF,                   /* LDUHI @(GRi,d12),GRk */
-        [0x51] = _MA_STxI | _MA_HALF,                   /* STHI  @(GRi,d12),GRk */
-        [0x52] = _MA_STxI | _MA_WORD,                   /* STI   @(GRi,d12),GRk */
-        [0x53] = _MA_STxI | _MA_DWORD,                  /* STDI  @(GRi,d12),GRk */
-};
-
-
-/*****************************************************************************/
-/*
- * see if we can handle the exception by fixing up a misaligned memory access
- */
-int handle_misalignment(unsigned long esr0, unsigned long ear0, unsigned long epcr0)
-{
-        unsigned long insn, addr, *greg;
-        int GRi, GRj, GRk, D12, op;
-
-        union {
-                uint64_t _64;
-                uint32_t _32[2];
-                uint16_t _16;
-                uint8_t _8[8];
-        } x;
-
-        if (!(esr0 & ESR0_EAV) || !(epcr0 & EPCR0_V) || !(ear0 & 7))
-                return -EAGAIN;
-
-        epcr0 &= EPCR0_PC;
-
-        if (__frame->pc != epcr0) {
-                kdebug("MISALIGN: Execution not halted on excepting instruction\n");
-                BUG();
-        }
-
-        if (__get_user(insn, (unsigned long *) epcr0) < 0)
-                return -EFAULT;
-
-        /* determine the instruction type first */
-        switch ((insn >> 18) & 0x7f) {
-        case 0x2:
-                /* LDx @(GRi,GRj),GRk */
-                op = tbl_LDGRk_reg[(insn >> 6) & 0x3f];
-                break;
-
-        case 0x3:
-                /* STx GRk,@(GRi,GRj) */
-                op = tbl_STGRk_reg[(insn >> 6) & 0x3f];
-                break;
-
-        default:
-                op = tbl_LDSTGRk_imm[(insn >> 18) & 0x7f];
-                break;
-        }
-
-        if (!op)
-                return -EAGAIN;
-
-        kdebug("MISALIGN: pc=%08lx insn=%08lx ad=%08lx op=%02x\n", epcr0, insn, ear0, op);
-
-        memset(&x, 0xba, 8);
-
-        /* validate the instruction parameters */
-        greg = (unsigned long *) &__frame->tbr;
-
-        GRi = (insn >> 12) & 0x3f;
-        GRk = (insn >> 25) & 0x3f;
-