#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;
}
+++ /dev/null
-/* 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;
-
- if (GRi > 31 || GRk > 31)
- return -ENOENT;
-
- if (op & _MA_DWORD && GRk & 1)
- return -EINVAL;
-
- if (op & _MA_IMM) {
- D12 = insn & 0xfff;
- asm ("slli %0,#20,%0 ! srai %0,#20,%0" : "=r"(D12) : "0"(D12)); /* sign extend */
- addr = (GRi ? greg[GRi] : 0) + D12;
- }
- else {
- GRj = (insn >> 0) & 0x3f;
- if (GRj > 31)
- return -ENOENT;
- addr = (GRi ? greg[GRi] : 0) + (GRj ? greg[GRj] : 0);
- }
-
- if (addr != ear0) {
- kdebug("MISALIGN: Calculated addr (%08lx) does not match EAR0 (%08lx)\n",
- addr, ear0);
- return -EFAULT;
- }
-
- /* check the address is okay */
- if (user_mode(__frame) && ___range_ok(ear0, 8) < 0)
- return -EFAULT;
-
- /* perform the memory op */
- if (op & _MA_STORE) {
- /* perform a store */
- x._32[0] = 0;
- if (GRk != 0) {
- if (op & _MA_HALF) {
- x._16 = greg[GRk];
- }
- else {
- x._32[0] = greg[GRk];
- }
- }
- if (op & _MA_DWORD)
- x._32[1] = greg[GRk + 1];
-
- kdebug("MISALIGN: Store GR%d { %08x:%08x } -> %08lx (%dB)\n",
- GRk, x._32[1], x._32[0], addr, op & _MA_SZ_MASK);
-
- if (__memcpy_user((void *) addr, &x, op & _MA_SZ_MASK) != 0)
- return -EFAULT;
- }
- else {
- /* perform a load */
- if (__memcpy_user(&x, (void *) addr, op & _MA_SZ_MASK) != 0)
- return -EFAULT;
-
- if (op & _MA_HALF) {
- if (op & _MA_SIGNED)
- asm ("slli %0,#16,%0 ! srai %0,#16,%0"
- : "=r"(x._32[0]) : "0"(x._16));
- else
- asm ("sethi #0,%0"
- : "=r"(x._32[0]) : "0"(x._16));
- }
-
- kdebug("MISALIGN: Load %08lx (%dB) -> GR%d, { %08x:%08x }\n",
- addr, op & _MA_SZ_MASK, GRk, x._32[1], x._32[0]);
-
- if (GRk != 0)
- greg[GRk] = x._32[0];
- if (op & _MA_DWORD)
- greg[GRk + 1] = x._32[1];
- }
-
- /* update the base pointer if required */
- if (op & _MA_UPDATE)
- greg[GRi] = addr;
-
- /* well... we've done that insn */
- __frame->pc = __frame->pc + 4;
-
- return 0;
-} /* end handle_misalignment() */
-#ifndef __ALPHA_UNALIGNED_H
-#define __ALPHA_UNALIGNED_H
+#ifndef _ASM_ALPHA_UNALIGNED_H
+#define _ASM_ALPHA_UNALIGNED_H
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/le_struct.h>
+#include <linux/unaligned/be_byteshift.h>
+#include <linux/unaligned/generic.h>
-#endif
+#define get_unaligned __get_unaligned_le
+#define put_unaligned __put_unaligned_le
+
+#endif /* _ASM_ALPHA_UNALIGNED_H */
-#ifndef __ASM_ARM_UNALIGNED_H
-#define __ASM_ARM_UNALIGNED_H
+#ifndef _ASM_ARM_UNALIGNED_H
+#define _ASM_ARM_UNALIGNED_H
-#include <asm/types.h>
-
-extern int __bug_unaligned_x(const void *ptr);
-
-/*
- * What is the most efficient way of loading/storing an unaligned value?
- *
- * That is the subject of this file. Efficiency here is defined as
- * minimum code size with minimum register usage for the common cases.
- * It is currently not believed that long longs are common, so we
- * trade efficiency for the chars, shorts and longs against the long
- * longs.
- *
- * Current stats with gcc 2.7.2.2 for these functions:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 3 7 3
- * 8 20 6 16 6
- *
- * gcc 2.95.1 seems to code differently:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 4 7 4
- * 8 19 8 15 6
- *
- * which may or may not be more efficient (depending upon whether
- * you can afford the extra registers). Hopefully the gcc 2.95
- * is inteligent enough to decide if it is better to use the
- * extra register, but evidence so far seems to suggest otherwise.
- *
- * Unfortunately, gcc is not able to optimise the high word
- * out of long long >> 32, or the low word from long long << 32
- */
-
-#define __get_unaligned_2_le(__p) \
- (unsigned int)(__p[0] | __p[1] << 8)
-
-#define __get_unaligned_2_be(__p) \
- (unsigned int)(__p[0] << 8 | __p[1])
-
-#define __get_unaligned_4_le(__p) \
- (unsigned int)(__p[0] | __p[1] << 8 | __p[2] << 16 | __p[3] << 24)
-
-#define __get_unaligned_4_be(__p) \
- (unsigned int)(__p[0] << 24 | __p[1] << 16 | __p[2] << 8 | __p[3])
-
-#define __get_unaligned_8_le(__p) \
- ((unsigned long long)__get_unaligned_4_le((__p+4)) << 32 | \
- __get_unaligned_4_le(__p))
-
-#define __get_unaligned_8_be(__p) \
- ((unsigned long long)__get_unaligned_4_be(__p) << 32 | \
- __get_unaligned_4_be((__p+4)))
-
-#define __get_unaligned_le(ptr) \
- ((__force typeof(*(ptr)))({ \
- const __u8 *__p = (const __u8 *)(ptr); \
- __builtin_choose_expr(sizeof(*(ptr)) == 1, *__p, \
- __builtin_choose_expr(sizeof(*(ptr)) == 2, __get_unaligned_2_le(__p), \
- __builtin_choose_expr(sizeof(*(ptr)) == 4, __get_unaligned_4_le(__p), \
- __builtin_choose_expr(sizeof(*(ptr)) == 8, __get_unaligned_8_le(__p), \
- (void)__bug_unaligned_x(__p))))); \
- }))
-
-#define __get_unaligned_be(ptr) \
- ((__force typeof(*(ptr)))({ \
- const __u8 *__p = (const __u8 *)(ptr); \
- __builtin_choose_expr(sizeof(*(ptr)) == 1, *__p, \
- __builtin_choose_expr(sizeof(*(ptr)) == 2, __get_unaligned_2_be(__p), \
- __builtin_choose_expr(sizeof(*(ptr)) == 4, __get_unaligned_4_be(__p), \
- __builtin_choose_expr(sizeof(*(ptr)) == 8, __get_unaligned_8_be(__p), \
- (void)__bug_unaligned_x(__p))))); \
- }))
-
-
-static inline void __put_unaligned_2_le(__u32 __v, register __u8 *__p)
-{
- *__p++ = __v;
- *__p++ = __v >> 8;
-}
-
-static inline void __put_unaligned_2_be(__u32 __v, register __u8 *__p)
-{
- *__p++ = __v >> 8;
- *__p++ = __v;
-}
-
-static inline void __put_unaligned_4_le(__u32 __v, register __u8 *__p)
-{
- __put_unaligned_2_le(__v >> 16, __p + 2);
- __put_unaligned_2_le(__v, __p);
-}
-
-static inline void __put_unaligned_4_be(__u32 __v, register __u8 *__p)
-{
- __put_unaligned_2_be(__v >> 16, __p);
- __put_unaligned_2_be(__v, __p + 2);
-}
-
-static inline void __put_unaligned_8_le(const unsigned long long __v, register __u8 *__p)
-{
- /*
- * tradeoff: 8 bytes of stack for all unaligned puts (2
- * instructions), or an extra register in the long long
- * case - go for the extra register.
- */
- __put_unaligned_4_le(__v >> 32, __p+4);
- __put_unaligned_4_le(__v, __p);
-}
-
-static inline void __put_unaligned_8_be(const unsigned long long __v, register __u8 *__p)
-{
- /*
- * tradeoff: 8 bytes of stack for all unaligned puts (2
- * instructions), or an extra register in the long long
- * case - go for the extra register.
- */
- __put_unaligned_4_be(__v >> 32, __p);
- __put_unaligned_4_be(__v, __p+4);
-}
-
-/*
- * Try to store an unaligned value as efficiently as possible.
- */
-#define __put_unaligned_le(val,ptr) \
- ({ \
- (void)sizeof(*(ptr) = (val)); \
- switch (sizeof(*(ptr))) { \
- case 1: \
- *(ptr) = (val); \
- break; \
- case 2: __put_unaligned_2_le((__force u16)(val),(__u8 *)(ptr)); \
- break; \
- case 4: __put_unaligned_4_le((__force u32)(val),(__u8 *)(ptr)); \
- break; \
- case 8: __put_unaligned_8_le((__force u64)(val),(__u8 *)(ptr)); \
- break; \
- default: __bug_unaligned_x(ptr); \
- break; \
- } \
- (void) 0; \
- })
-
-#define __put_unaligned_be(val,ptr) \
- ({ \
- (void)sizeof(*(ptr) = (val)); \
- switch (sizeof(*(ptr))) { \
- case 1: \
- *(ptr) = (val); \
- break; \
- case 2: __put_unaligned_2_be((__force u16)(val),(__u8 *)(ptr)); \
- break; \
- case 4: __put_unaligned_4_be((__force u32)(val),(__u8 *)(ptr)); \
- break; \
- case 8: __put_unaligned_8_be((__force u64)(val),(__u8 *)(ptr)); \
- break; \
- default: __bug_unaligned_x(ptr); \
- break; \
- } \
- (void) 0; \
- })
+#include <linux/unaligned/le_byteshift.h>
+#include <linux/unaligned/be_byteshift.h>
+#include <linux/unaligned/generic.h>
/*
* Select endianness
#define put_unaligned __put_unaligned_be
#endif
-#endif
+#endif /* _ASM_ARM_UNALIGNED_H */
-#ifndef __ASM_AVR32_UNALIGNED_H
-#define __ASM_AVR32_UNALIGNED_H
+#ifndef _ASM_AVR32_UNALIGNED_H
+#define _ASM_AVR32_UNALIGNED_H
/*
* AVR32 can handle some unaligned accesses, depending on the
* optimize word loads in general.
*/
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/be_struct.h>
+#include <linux/unaligned/le_byteshift.h>
+#include <linux/unaligned/generic.h>
-#endif /* __ASM_AVR32_UNALIGNED_H */
+#define get_unaligned __get_unaligned_be
+#define put_unaligned __put_unaligned_be
+
+#endif /* _ASM_AVR32_UNALIGNED_H */
-#ifndef __BFIN_UNALIGNED_H
-#define __BFIN_UNALIGNED_H
+#ifndef _ASM_BLACKFIN_UNALIGNED_H
+#define _ASM_BLACKFIN_UNALIGNED_H
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/le_struct.h>
+#include <linux/unaligned/be_byteshift.h>
+#include <linux/unaligned/generic.h>
-#endif /* __BFIN_UNALIGNED_H */
+#define get_unaligned __get_unaligned_le
+#define put_unaligned __put_unaligned_le
+
+#endif /* _ASM_BLACKFIN_UNALIGNED_H */
-#ifndef __CRIS_UNALIGNED_H
-#define __CRIS_UNALIGNED_H
+#ifndef _ASM_CRIS_UNALIGNED_H
+#define _ASM_CRIS_UNALIGNED_H
/*
* CRIS can do unaligned accesses itself.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
+#include <linux/unaligned/access_ok.h>
+#include <linux/unaligned/generic.h>
-#define get_unaligned(ptr) (*(ptr))
+#define get_unaligned __get_unaligned_le
+#define put_unaligned __put_unaligned_le
-#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
-
-#endif
+#endif /* _ASM_CRIS_UNALIGNED_H */
* 2 of the License, or (at your option) any later version.
*/
-#ifndef _ASM_UNALIGNED_H
-#define _ASM_UNALIGNED_H
+#ifndef _ASM_FRV_UNALIGNED_H
+#define _ASM_FRV_UNALIGNED_H
+#include <linux/unaligned/le_byteshift.h>
+#include <linux/unaligned/be_byteshift.h>
+#include <linux/unaligned/generic.h>
-/*
- * Unaligned accesses on uClinux can't be performed in a fault handler - the
- * CPU detects them as imprecise exceptions making this impossible.
- *
- * With the FR451, however, they are precise, and so we used to fix them up in
- * the memory access fault handler. However, instruction bundling make this
- * impractical. So, now we fall back to using memcpy.
- */
-#ifdef CONFIG_MMU
-
-/*
- * The asm statement in the macros below is a way to get GCC to copy a
- * value from one variable to another without having any clue it's
- * actually doing so, so that it won't have any idea that the values
- * in the two variables are related.
- */
-
-#define get_unaligned(ptr) ({ \
- typeof((*(ptr))) __x; \
- void *__ptrcopy; \
- asm("" : "=r" (__ptrcopy) : "0" (ptr)); \
- memcpy(&__x, __ptrcopy, sizeof(*(ptr))); \
- __x; \
-})
-
-#define put_unaligned(val, ptr) ({ \
- typeof((*(ptr))) __x = (val); \
- void *__ptrcopy; \
- asm("" : "=r" (__ptrcopy) : "0" (ptr)); \
- memcpy(__ptrcopy, &__x, sizeof(*(ptr))); \
-})
-
-extern int handle_misalignment(unsigned long esr0, unsigned long ear0, unsigned long epcr0);
-
-#else
-
-#define get_unaligned(ptr) \
-({ \
- typeof(*(ptr)) x; \
- const char *__p = (const char *) (ptr); \
- \
- switch (sizeof(x)) { \
- case 1: \
- x = *(ptr); \
- break; \
- case 2: \
- { \
- uint8_t a; \
- asm(" ldub%I2 %M2,%0 \n" \
- " ldub%I3.p %M3,%1 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%1,%0 \n" \
- : "=&r"(x), "=&r"(a) \
- : "m"(__p[0]), "m"(__p[1]) \
- ); \
- break; \
- } \
- \
- case 4: \
- { \
- uint8_t a; \
- asm(" ldub%I2 %M2,%0 \n" \
- " ldub%I3.p %M3,%1 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%1,%0 \n" \
- " ldub%I4.p %M4,%1 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%1,%0 \n" \
- " ldub%I5.p %M5,%1 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%1,%0 \n" \
- : "=&r"(x), "=&r"(a) \
- : "m"(__p[0]), "m"(__p[1]), "m"(__p[2]), "m"(__p[3]) \
- ); \
- break; \
- } \
- \
- case 8: \
- { \
- union { uint64_t x; u32 y[2]; } z; \
- uint8_t a; \
- asm(" ldub%I3 %M3,%0 \n" \
- " ldub%I4.p %M4,%2 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%2,%0 \n" \
- " ldub%I5.p %M5,%2 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%2,%0 \n" \
- " ldub%I6.p %M6,%2 \n" \
- " slli %0,#8,%0 \n" \
- " or %0,%2,%0 \n" \
- " ldub%I7 %M7,%1 \n" \
- " ldub%I8.p %M8,%2 \n" \
- " slli %1,#8,%1 \n" \
- " or %1,%2,%1 \n" \
- " ldub%I9.p %M9,%2 \n" \
- " slli %1,#8,%1 \n" \
- " or %1,%2,%1 \n" \
- " ldub%I10.p %M10,%2 \n" \
- " slli %1,#8,%1 \n" \
- " or %1,%2,%1 \n" \
- : "=&r"(z.y[0]), "=&r"(z.y[1]), "=&r"(a) \
- : "m"(__p[0]), "m"(__p[1]), "m"(__p[2]), "m"(__p[3]), \
- "m"(__p[4]), "m"(__p[5]), "m"(__p[6]), "m"(__p[7]) \
- ); \
- x = z.x; \
- break; \
- } \
- \
- default: \
- x = 0; \
- BUG(); \
- break; \
- } \
- \
- x; \
-})
-
-#define put_unaligned(val, ptr) \
-do { \
- char *__p = (char *) (ptr); \
- int x; \
- \
- switch (sizeof(*ptr)) { \
- case 2: \
- { \
- asm(" stb%I1.p %0,%M1 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I2 %0,%M2 \n" \
- : "=r"(x), "=m"(__p[1]), "=m"(__p[0]) \
- : "0"(val) \
- ); \
- break; \
- } \
- \
- case 4: \
- { \
- asm(" stb%I1.p %0,%M1 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I2.p %0,%M2 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I3.p %0,%M3 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I4 %0,%M4 \n" \
- : "=r"(x), "=m"(__p[3]), "=m"(__p[2]), "=m"(__p[1]), "=m"(__p[0]) \
- : "0"(val) \
- ); \
- break; \
- } \
- \
- case 8: \
- { \
- uint32_t __high, __low; \
- __high = (uint64_t)val >> 32; \
- __low = val & 0xffffffff; \
- asm(" stb%I2.p %0,%M2 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I3.p %0,%M3 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I4.p %0,%M4 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I5.p %0,%M5 \n" \
- " srli %0,#8,%0 \n" \
- " stb%I6.p %1,%M6 \n" \
- " srli %1,#8,%1 \n" \
- " stb%I7.p %1,%M7 \n" \
- " srli %1,#8,%1 \n" \
- " stb%I8.p %1,%M8 \n" \
- " srli %1,#8,%1 \n" \
- " stb%I9 %1,%M9 \n" \
- : "=&r"(__low), "=&r"(__high), "=m"(__p[7]), "=m"(__p[6]), \
- "=m"(__p[5]), "=m"(__p[4]), "=m"(__p[3]), "=m"(__p[2]), \
- "=m"(__p[1]), "=m"(__p[0]) \
- : "0"(__low), "1"(__high) \
- ); \
- break; \
- } \
- \
- default: \
- *(ptr) = (val); \
- break; \
- } \
-} while(0)
-
-#endif
+#define get_unaligned __get_unaligned_be
+#define put_unaligned __put_unaligned_be
-#endif
+#endif /* _ASM_FRV_UNALIGNED_H */
+++ /dev/null
-#ifndef _ASM_GENERIC_UNALIGNED_H_
-#define _ASM_GENERIC_UNALIGNED_H_
-
-/*
- * For the benefit of those who are trying to port Linux to another
- * architecture, here are some C-language equivalents.
- *
- * This is based almost entirely upon Richard Henderson's
- * asm-alpha/unaligned.h implementation. Some comments were
- * taken from David Mosberger's asm-ia64/unaligned.h header.
- */
-
-#include <linux/types.h>
-
-/*
- * The main single-value unaligned transfer routines.
- */
-#define get_unaligned(ptr) \
- __get_unaligned((ptr), sizeof(*(ptr)))
-#define put_unaligned(x,ptr) \
- ((void)sizeof(*(ptr)=(x)),\
- __put_unaligned((__force __u64)(x), (ptr), sizeof(*(ptr))))
-
-/*
- * This function doesn't actually exist. The idea is that when
- * someone uses the macros below with an unsupported size (datatype),
- * the linker will alert us to the problem via an unresolved reference
- * error.
- */
-extern void bad_unaligned_access_length(void) __attribute__((noreturn));
-
-struct __una_u64 { __u64 x __attribute__((packed)); };
-struct __una_u32 { __u32 x __attribute__((packed)); };
-struct __una_u16 { __u16 x __attribute__((packed)); };
-
-/*
- * Elemental unaligned loads
- */
-
-static inline __u64 __uldq(const __u64 *addr)
-{
- const struct __una_u64 *ptr = (const struct __una_u64 *) addr;
- return ptr->x;
-}
-
-static inline __u32 __uldl(const __u32 *addr)
-{
- const struct __una_u32 *ptr = (const struct __una_u32 *) addr;
- return ptr->x;
-}
-
-static inline __u16 __uldw(const __u16 *addr)
-{
- const struct __una_u16 *ptr = (const struct __una_u16 *) addr;
- return ptr->x;
-}
-
-/*
- * Elemental unaligned stores
- */
-
-static inline void __ustq(__u64 val, __u64 *addr)
-{
- struct __una_u64 *ptr = (struct __una_u64 *) addr;
- ptr->x = val;
-}
-
-static inline void __ustl(__u32 val, __u32 *addr)
-{
- struct __una_u32 *ptr = (struct __una_u32 *) addr;
- ptr->x = val;
-}
-
-static inline void __ustw(__u16 val, __u16 *addr)
-{
- struct __una_u16 *ptr = (struct __una_u16 *) addr;
- ptr->x = val;
-}
-
-#define __get_unaligned(ptr, size) ({ \
- const void *__gu_p = ptr; \
- __u64 __val; \
- switch (size) { \
- case 1: \
- __val = *(const __u8 *)__gu_p; \
- break; \
- case 2: \
- __val = __uldw(__gu_p); \
- break; \
- case 4: \
- __val = __uldl(__gu_p); \
- break; \
- case 8: \
- __val = __uldq(__gu_p); \
- break; \
- default: \
- bad_unaligned_access_length(); \
- }; \
- (__force __typeof__(*(ptr)))__val; \
-})
-
-#define __put_unaligned(val, ptr, size) \
-({ \
- void *__gu_p = ptr; \
- switch (size) { \
- case 1: \
- *(__u8 *)__gu_p = (__force __u8)val; \
- break; \
- case 2: \
- __ustw((__force __u16)val, __gu_p); \
- break; \
- case 4: \
- __ustl((__force __u32)val, __gu_p); \
- break; \
- case 8: \
- __ustq(val, __gu_p); \
- break; \
- default: \
- bad_unaligned_access_length(); \
- }; \
- (void)0; \
-})
-
-#endif /* _ASM_GENERIC_UNALIGNED_H */
-#ifndef __H8300_UNALIGNED_H
-#define __H8300_UNALIGNED_H
+#ifndef _ASM_H8300_UNALIGNED_H
+#define _ASM_H8300_UNALIGNED_H
+#include <linux/unaligned/be_memmove.h>
+#include <linux/unaligned/le_byteshift.h>
+#include <linux/unaligned/generic.h>
-/* Use memmove here, so gcc does not insert a __builtin_memcpy. */
+#define get_unaligned __get_unaligned_be
+#define put_unaligned __put_unaligned_be
-#define get_unaligned(ptr) \
- ({ __typeof__(*(ptr)) __tmp; memmove(&__tmp, (ptr), sizeof(*(ptr))); __tmp; })
-
-#define put_unaligned(val, ptr) \
- ({ __typeof__(*(ptr)) __tmp = (val); \
- memmove((ptr), &__tmp, sizeof(*(ptr))); \
- (void)0; })
-
-#endif
+#endif /* _ASM_H8300_UNALIGNED_H */
#ifndef _ASM_IA64_UNALIGNED_H
#define _ASM_IA64_UNALIGNED_H
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/le_struct.h>
+#include <linux/unaligned/be_byteshift.h>
+#include <linux/unaligned/generic.h>
+
+#define get_unaligned __get_unaligned_le
+#define put_unaligned __put_unaligned_le
#endif /* _ASM_IA64_UNALIGNED_H */
#ifndef _ASM_M32R_UNALIGNED_H
#define _ASM_M32R_UNALIGNED_H
-/*
- * For the benefit of those who are trying to port Linux to another
- * architecture, here are some C-language equivalents.
- */
-
-#include <asm/string.h>
-
-#define get_unaligned(ptr) \
- ({ __typeof__(*(ptr)) __tmp; memmove(&__tmp, (ptr), sizeof(*(ptr))); __tmp; })
-
-#define put_unaligned(val, ptr) \
- ({ __typeof__(*(ptr)) __tmp = (val); \
- memmove((ptr), &__tmp, sizeof(*(ptr))); \
- (void)0; })
+#if defined(__LITTLE_ENDIAN__)
+# include <linux/unaligned/le_memmove.h>
+# include <linux/unaligned/be_byteshift.h>
+# include <linux/unaligned/generic.h>
+# define get_unaligned __get_unaligned_le
+# define put_unaligned __put_unaligned_le
+#else
+# include <linux/unaligned/be_memmove.h>
+# include <linux/unaligned/le_byteshift.h>
+# include <linux/unaligned/generic.h>
+# define get_unaligned __get_unaligned_be
+# define put_unaligned __put_unaligned_be
+#endif
#endif /* _ASM_M32R_UNALIGNED_H */
-#ifndef __M68K_UNALIGNED_H
-#define __M68K_UNALIGNED_H
+#ifndef _ASM_M68K_UNALIGNED_H
+#define _ASM_M68K_UNALIGNED_H
/*
* The m68k can do unaligned accesses itself.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
+#include <linux/unaligned/access_ok.h>
+#include <linux/unaligned/generic.h>
-#define get_unaligned(ptr) (*(ptr))
+#define get_unaligned __get_unaligned_be
+#define put_unaligned __put_unaligned_be
-#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
-
-#endif
+#endif /* _ASM_M68K_UNALIGNED_H */
-#ifndef __M68K_UNALIGNED_H
-#define __M68K_UNALIGNED_H
+#ifndef _ASM_M68KNOMMU_UNALIGNED_H
+#define _ASM_M68KNOMMU_UNALIGNED_H
#ifdef CONFIG_COLDFIRE
+#include <linux/unaligned/be_struct.h>
+#include <linux/unaligned/le_byteshift.h>
+#include <linux/unaligned/generic.h>
-#include <asm-generic/unaligned.h>
+#define get_unaligned __get_unaligned_be
+#define put_unaligned __put_unaligned_be
#else
/*
* The m68k can do unaligned accesses itself.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
+#include <linux/unaligned/access_ok.h>
+#include <linux/unaligned/generic.h>
-#define get_unaligned(ptr) (*(ptr))
-#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
+#define get_unaligned __get_unaligned_be
+#define put_unaligned __put_unaligned_be
#endif
-#endif
+#endif /* _ASM_M68KNOMMU_UNALIGNED_H */
*
* Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
*/
-#ifndef __ASM_GENERIC_UNALIGNED_H
-#define __ASM_GENERIC_UNALIGNED_H
+#ifndef _ASM_MIPS_UNALIGNED_H
+#define _ASM_MIPS_UNALIGNED_H
#include <linux/compiler.h>
+#if defined(__MIPSEB__)
+# include <linux/unaligned/be_struct.h>
+# include <linux/unaligned/le_byteshift.h>
+# include <linux/unaligned/generic.h>
+# define get_unaligned __get_unaligned_be
+# define put_unaligned __put_unaligned_be
+#elif defined(__MIPSEL__)
+# include <linux/unaligned/le_struct.h>
+# include <linux/unaligned/be_byteshift.h>
+# include <linux/unaligned/generic.h>
+# define get_unaligned __get_unaligned_le
+# define put_unaligned __put_unaligned_le
+#else
+# error "MIPS, but neither __MIPSEB__, nor __MIPSEL__???"
+#endif
-#define get_unaligned(ptr) \
-({ \
- struct __packed { \
- typeof(*(ptr)) __v; \
- } *__p = (void *) (ptr); \
- __p->__v; \
-})
-
-#define put_unaligned(val, ptr) \
-do { \
- struct __packed { \
- typeof(*(ptr)) __v; \
- } *__p = (void *) (ptr); \
- __p->__v = (val); \
-} while(0)
-
-#endif /* __ASM_GENERIC_UNALIGNED_H */
+#endif /* _ASM_MIPS_UNALIGNED_H */
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
-#ifndef _ASM_UNALIGNED_H
-#define _ASM_UNALIGNED_H
+#ifndef _ASM_MN10300_UNALIGNED_H
+#define _ASM_MN10300_UNALIGNED_H
-#include <asm/types.h>
+#include <linux/unaligned/access_ok.h>
+#include <linux/unaligned/generic.h>
-#if 0
-extern int __bug_unaligned_x(void *ptr);
+#define get_unaligned __get_unaligned_le
+#define put_unaligned __put_unaligned_le
-/*
- * What is the most efficient way of loading/storing an unaligned value?
- *
- * That is the subject of this file. Efficiency here is defined as
- * minimum code size with minimum register usage for the common cases.
- * It is currently not believed that long longs are common, so we
- * trade efficiency for the chars, shorts and longs against the long
- * longs.
- *
- * Current stats with gcc 2.7.2.2 for these functions:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 3 7 3
- * 8 20 6 16 6
- *
- * gcc 2.95.1 seems to code differently:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 4 7 4
- * 8 19 8 15 6
- *
- * which may or may not be more efficient (depending upon whether
- * you can afford the extra registers). Hopefully the gcc 2.95
- * is inteligent enough to decide if it is better to use the
- * extra register, but evidence so far seems to suggest otherwise.
- *
- * Unfortunately, gcc is not able to optimise the high word
- * out of long long >> 32, or the low word from long long << 32
- */
-
-#define __get_unaligned_2(__p) \
- (__p[0] | __p[1] << 8)
-
-#define __get_unaligned_4(__p) \
- (__p[0] | __p[1] << 8 | __p[2] << 16 | __p[3] << 24)
-
-#define get_unaligned(ptr) \
-({ \
- unsigned int __v1, __v2; \
- __typeof__(*(ptr)) __v; \
- __u8 *__p = (__u8 *)(ptr); \
- \
- switch (sizeof(*(ptr))) { \
- case 1: __v = *(ptr); break; \
- case 2: __v = __get_unaligned_2(__p); break; \
- case 4: __v = __get_unaligned_4(__p); break; \
- case 8: \
- __v2 = __get_unaligned_4((__p+4)); \
- __v1 = __get_unaligned_4(__p); \
- __v = ((unsigned long long)__v2 << 32 | __v1); \
- break; \
- default: __v = __bug_unaligned_x(__p); break; \
- } \
- __v; \
-})
-
-
-static inline void __put_unaligned_2(__u32 __v, register __u8 *__p)
-{
- *__p++ = __v;
- *__p++ = __v >> 8;
-}
-
-static inline void __put_unaligned_4(__u32 __v, register __u8 *__p)
-{
- __put_unaligned_2(__v >> 16, __p + 2);
- __put_unaligned_2(__v, __p);
-}
-
-static inline void __put_unaligned_8(const unsigned long long __v, __u8 *__p)
-{
- /*
- * tradeoff: 8 bytes of stack for all unaligned puts (2
- * instructions), or an extra register in the long long
- * case - go for the extra register.
- */
- __put_unaligned_4(__v >> 32, __p + 4);
- __put_unaligned_4(__v, __p);
-}
-
-/*
- * Try to store an unaligned value as efficiently as possible.
- */
-#define put_unaligned(val, ptr) \
- ({ \
- switch (sizeof(*(ptr))) { \
- case 1: \
- *(ptr) = (val); \
- break; \
- case 2: \
- __put_unaligned_2((val), (__u8 *)(ptr)); \
- break; \
- case 4: \
- __put_unaligned_4((val), (__u8 *)(ptr)); \
- break; \
- case 8: \
- __put_unaligned_8((val), (__u8 *)(ptr)); \
- break; \
- default: \
- __bug_unaligned_x(ptr); \
- break; \
- } \
- (void) 0; \
- })
-
-
-#else
-
-#define get_unaligned(ptr) (*(ptr))
-#define put_unaligned(val, ptr) ({ *(ptr) = (val); (void) 0; })
-
-#endif
-
-#endif
+#endif /* _ASM_MN10300_UNALIGNED_H */
-#ifndef _ASM_PARISC_UNALIGNED_H_
-#define _ASM_PARISC_UNALIGNED_H_
+#ifndef _ASM_PARISC_UNALIGNED_H
+#define _ASM_PARISC_UNALIGNED_H
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/be_struct.h>
+#include <linux/unaligned/le_byteshift.h>
+#include <linux/unaligned/generic.h>
+#define get_unaligned __get_unaligned_be
+#define put_unaligned __put_unaligned_be
#ifdef __KERNEL__
struct pt_regs;
int check_unaligned(struct pt_regs *regs);
#endif
-#endif /* _ASM_PARISC_UNALIGNED_H_ */
+#endif /* _ASM_PARISC_UNALIGNED_H */
/*
* The PowerPC can do unaligned accesses itself in big endian mode.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
+#include <linux/unaligned/access_ok.h>
+#include <linux/unaligned/generic.h>
-#define get_unaligned(ptr) (*(ptr))
-
-#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
+#define get_unaligned __get_unaligned_be
+#define put_unaligned __put_unaligned_be
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_UNALIGNED_H */
-/*
- * include/asm-s390/unaligned.h
- *
- * S390 version
- *
- * Derived from "include/asm-i386/unaligned.h"
- */
-
-#ifndef __S390_UNALIGNED_H
-#define __S390_UNALIGNED_H
+#ifndef _ASM_S390_UNALIGNED_H
+#define _ASM_S390_UNALIGNED_H
/*
* The S390 can do unaligned accesses itself.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
+#include <linux/unaligned/access_ok.h>
+#include <linux/unaligned/generic.h>
-#define get_unaligned(ptr) (*(ptr))
-
-#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
+#define get_unaligned __get_unaligned_be
+#define put_unaligned __put_unaligned_be
-#endif
+#endif /* _ASM_S390_UNALIGNED_H */
-#ifndef __ASM_SH_UNALIGNED_H
-#define __ASM_SH_UNALIGNED_H
+#ifndef _ASM_SH_UNALIGNED_H
+#define _ASM_SH_UNALIGNED_H
/* SH can't handle unaligned accesses. */
-#include <asm-generic/unaligned.h>
+#ifdef __LITTLE_ENDIAN__
+# include <linux/unaligned/le_struct.h>
+# include <linux/unaligned/be_byteshift.h>
+# include <linux/unaligned/generic.h>
+# define get_unaligned __get_unaligned_le
+# define put_unaligned __put_unaligned_le
+#else
+# include <linux/unaligned/be_struct.h>
+# include <linux/unaligned/le_byteshift.h>
+# include <linux/unaligned/generic.h>
+# define get_unaligned __get_unaligned_be
+# define put_unaligned __put_unaligned_be
+#endif
-#endif /* __ASM_SH_UNALIGNED_H */
+#endif /* _ASM_SH_UNALIGNED_H */
-#ifndef _ASM_SPARC_UNALIGNED_H_
-#define _ASM_SPARC_UNALIGNED_H_
+#ifndef _ASM_SPARC_UNALIGNED_H
+#define _ASM_SPARC_UNALIGNED_H
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/be_struct.h>
+#include <linux/unaligned/le_byteshift.h>
+#include <linux/unaligned/generic.h>
+#define get_unaligned __get_unaligned_be
+#define put_unaligned __put_unaligned_be
#endif /* _ASM_SPARC_UNALIGNED_H */
-#ifndef _ASM_SPARC64_UNALIGNED_H_
-#define _ASM_SPARC64_UNALIGNED_H_
+#ifndef _ASM_SPARC64_UNALIGNED_H
+#define _ASM_SPARC64_UNALIGNED_H
-#include <asm-generic/unaligned.h>
+#include <linux/unaligned/be_struct.h>
+#include <linux/unaligned/le_byteshift.h>
+#include <linux/unaligned/generic.h>
+#define get_unaligned __get_unaligned_be
+#define put_unaligned __put_unaligned_be
#endif /* _ASM_SPARC64_UNALIGNED_H */
-#ifndef __UM_UNALIGNED_H
-#define __UM_UNALIGNED_H
+#ifndef _ASM_UM_UNALIGNED_H
+#define _ASM_UM_UNALIGNED_H
#include "asm/arch/unaligned.h"
-#endif
+#endif /* _ASM_UM_UNALIGNED_H */
/*
- * include/asm-v850/unaligned.h -- Unaligned memory access
- *
* Copyright (C) 2001 NEC Corporation
* Copyright (C) 2001 Miles Bader <miles@gnu.org>
*
* Public License. See the file COPYING in the main directory of this
* archive for more details.
*
- * This file is a copy of the arm version, include/asm-arm/unaligned.h
- *
* Note that some v850 chips support unaligned access, but it seems too
* annoying to use.
*/
+#ifndef _ASM_V850_UNALIGNED_H
+#define _ASM_V850_UNALIGNED_H
-#ifndef __V850_UNALIGNED_H__
-#define __V850_UNALIGNED_H__
-
-#include <asm/types.h>
-
-extern int __bug_unaligned_x(void *ptr);
-
-/*
- * What is the most efficient way of loading/storing an unaligned value?
- *
- * That is the subject of this file. Efficiency here is defined as
- * minimum code size with minimum register usage for the common cases.
- * It is currently not believed that long longs are common, so we
- * trade efficiency for the chars, shorts and longs against the long
- * longs.
- *
- * Current stats with gcc 2.7.2.2 for these functions:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 3 7 3
- * 8 20 6 16 6
- *
- * gcc 2.95.1 seems to code differently:
- *
- * ptrsize get: code regs put: code regs
- * 1 1 1 1 2
- * 2 3 2 3 2
- * 4 7 4 7 4
- * 8 19 8 15 6
- *
- * which may or may not be more efficient (depending upon whether
- * you can afford the extra registers). Hopefully the gcc 2.95
- * is inteligent enough to decide if it is better to use the
- * extra register, but evidence so far seems to suggest otherwise.
- *
- * Unfortunately, gcc is not able to optimise the high word
- * out of long long >> 32, or the low word from long long << 32
- */
-
-#define __get_unaligned_2(__p) \
- (__p[0] | __p[1] << 8)
-
-#define __get_unaligned_4(__p) \
- (__p[0] | __p[1] << 8 | __p[2] << 16 | __p[3] << 24)
-
-#define get_unaligned(ptr) \
- ({ \
- __typeof__(*(ptr)) __v; \
- __u8 *__p = (__u8 *)(ptr); \
- switch (sizeof(*(ptr))) { \
- case 1: __v = *(ptr); break; \
- case 2: __v = __get_unaligned_2(__p); break; \
- case 4: __v = __get_unaligned_4(__p); break; \
- case 8: { \
- unsigned int __v1, __v2; \
- __v2 = __get_unaligned_4((__p+4)); \
- __v1 = __get_unaligned_4(__p); \
- __v = ((unsigned long long)__v2 << 32 | __v1); \
- } \
- break; \
- default: __v = __bug_unaligned_x(__p); break; \
- } \
- __v; \
- })
-
-
-static inline void __put_unaligned_2(__u32 __v, register __u8 *__p)
-{
- *__p++ = __v;
- *__p++ = __v >> 8;
-}
-
-static inline void __put_unaligned_4(__u32 __v, register __u8 *__p)
-{
- __put_unaligned_2(__v >> 16, __p + 2);
- __put_unaligned_2(__v, __p);
-}
-
-static inline void __put_unaligned_8(const unsigned long long __v, register __u8 *__p)
-{
- /*
- * tradeoff: 8 bytes of stack for all unaligned puts (2
- * instructions), or an extra register in the long long
- * case - go for the extra register.
- */
- __put_unaligned_4(__v >> 32, __p+4);
- __put_unaligned_4(__v, __p);
-}
-
-/*
- * Try to store an unaligned value as efficiently as possible.
- */
-#define put_unaligned(val,ptr) \
- ({ \
- switch (sizeof(*(ptr))) { \
- case 1: \
- *(ptr) = (val); \
- break; \
- case 2: __put_unaligned_2((val),(__u8 *)(ptr)); \
- break; \
- case 4: __put_unaligned_4((val),(__u8 *)(ptr)); \
- break; \
- case 8: __put_unaligned_8((val),(__u8 *)(ptr)); \
- break; \
- default: __bug_unaligned_x(ptr); \
- break; \
- } \
- (void) 0; \
- })
+#include <linux/unaligned/be_byteshift.h>
+#include <linux/unaligned/le_byteshift.h>
+#include <linux/unaligned/generic.h>
+#define get_unaligned __get_unaligned_le
+#define put_unaligned __put_unaligned_le
-#endif /* __V850_UNALIGNED_H__ */
+#endif /* _ASM_V850_UNALIGNED_H */
/*
* The x86 can do unaligned accesses itself.
- *
- * The strange macros are there to make sure these can't
- * be misused in a way that makes them not work on other
- * architectures where unaligned accesses aren't as simple.
*/
-/**
- * get_unaligned - get value from possibly mis-aligned location
- * @ptr: pointer to value
- *
- * This macro should be used for accessing values larger in size than
- * single bytes at locations that are expected to be improperly aligned,
- * e.g. retrieving a u16 value from a location not u16-aligned.
- *
- * Note that unaligned accesses can be very expensive on some architectures.
- */
-#define get_unaligned(ptr) (*(ptr))
+#include <linux/unaligned/access_ok.h>
+#include <linux/unaligned/generic.h>
-/**
- * put_unaligned - put value to a possibly mis-aligned location
- * @val: value to place
- * @ptr: pointer to location
- *
- * This macro should be used for placing values larger in size than
- * single bytes at locations that are expected to be improperly aligned,
- * e.g. writing a u16 value to a location not u16-aligned.
- *
- * Note that unaligned accesses can be very expensive on some architectures.
- */
-#define put_unaligned(val, ptr) ((void)(*(ptr) = (val)))
+#define get_unaligned __get_unaligned_le
+#define put_unaligned __put_unaligned_le
#endif /* _ASM_X86_UNALIGNED_H */
/*
- * include/asm-xtensa/unaligned.h
- *
* Xtensa doesn't handle unaligned accesses efficiently.
*
* This file is subject to the terms and conditions of the GNU General Public
*
* Copyright (C) 2001 - 2005 Tensilica Inc.
*/
+#ifndef _ASM_XTENSA_UNALIGNED_H
+#define _ASM_XTENSA_UNALIGNED_H
-#ifndef _XTENSA_UNALIGNED_H
-#define _XTENSA_UNALIGNED_H
-
-#include <linux/string.h>
-
-/* Use memmove here, so gcc does not insert a __builtin_memcpy. */
-
-#define get_unaligned(ptr) \
- ({ __typeof__(*(ptr)) __tmp; memmove(&__tmp, (ptr), sizeof(*(ptr))); __tmp; })
-
-#define put_unaligned(val, ptr) \
- ({ __typeof__(*(ptr)) __tmp = (val); \
- memmove((ptr), &__tmp, sizeof(*(ptr))); \
- (void)0; })
+#ifdef __XTENSA_EL__
+# include <linux/unaligned/le_memmove.h>
+# include <linux/unaligned/be_byteshift.h>
+# include <linux/unaligned/generic.h>
+# define get_unaligned __get_unaligned_le
+# define put_unaligned __put_unaligned_le
+#elif defined(__XTENSA_EB__)
+# include <linux/unaligned/be_memmove.h>
+# include <linux/unaligned/le_byteshift.h>
+# include <linux/unaligned/generic.h>
+# define get_unaligned __get_unaligned_be
+# define put_unaligned __put_unaligned_be
+#else
+# error processor byte order undefined!
+#endif
-#endif /* _XTENSA_UNALIGNED_H */
+#endif /* _ASM_XTENSA_UNALIGNED_H */
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff