arch/x86/kernel/platform/i86pc/include/sys/asm_misc.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _SYS_ASM_MISC_H
  27 #define _SYS_ASM_MISC_H
  28
  29 #pragma ident   "%Z%%M% %I%     %E% SMI"
  30
  31 #ifdef  __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 #ifdef _ASM     /* The remainder of this file is only for assembly files */
  36
  37 /* Load reg with pointer to per-CPU structure */
  38 #if defined(__amd64)
  39 #define LOADCPU(reg)                    \
  40         movq    %gs:CPU_SELF, reg;
  41 #else
  42 #define LOADCPU(reg)                    \
  43         movl    %gs:CPU_SELF, reg;
  44 #endif
  45
  46 #define RET_INSTR       0xc3
  47 #define NOP_INSTR       0x90
  48 #define STI_INSTR       0xfb
  49 #define JMP_INSTR       0x00eb
  50
  51
  52 #if defined(__i386)
  53
  54 #define _HOT_PATCH_PROLOG                       \
  55         push    %ebp;                           \
  56         mov     %esp, %ebp;                     \
  57         push    %ebx;                           \
  58         push    %esi;                           \
  59         push    %edi
  60
  61 #define _HOT_PATCH(srcaddr, dstaddr, size)      \
  62         movl    $srcaddr, %esi;                 \
  63         movl    $dstaddr, %edi;                 \
  64         movl    $size, %ebx;                    \
  65 0:      pushl   $1;                             \
  66         /*CSTYLED*/                             \
  67         movzbl  (%esi), %eax;                   \
  68         pushl   %eax;                           \
  69         pushl   %edi;                           \
  70         call    hot_patch_kernel_text;          \
  71         addl    $12, %esp;                      \
  72         inc     %edi;                           \
  73         inc     %esi;                           \
  74         dec     %ebx;                           \
  75         test    %ebx, %ebx;                     \
  76         jne     0b
  77
  78 #define _HOT_PATCH_EPILOG                       \
  79         pop     %edi;                           \
  80         pop     %esi;                           \
  81         pop     %ebx;                           \
  82         mov     %ebp, %esp;                     \
  83         pop     %ebp
  84
  85 #endif  /* __i386 */
  86
  87 #if defined(__amd64)
  88
  89 /*
  90  * While as doesn't support fxsaveq/fxrstorq (fxsave/fxrstor with REX.W = 1)
  91  * we will use the FXSAVEQ/FXRSTORQ macro
  92  */
  93
  94 #define FXSAVEQ(x)      \
  95         .byte   0x48;   \
  96         fxsave  x
  97
  98 #define FXRSTORQ(x)     \
  99         .byte   0x48;   \
 100         fxrstor x
 101
 102 #endif  /* __amd64 */
 103
 104 #endif /* _ASM */
 105
 106 #ifdef  __cplusplus
 107 }
 108 #endif
 109
 110 #endif  /* _SYS_ASM_MISC_H */