kernel/arch/x86_64/include/io.h

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2008  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #ifndef _X86_64_H
  21 #define _X86_64_H
  22
  23 #include <system.h>
  24 #include <build.h>
  25
  26 #ifdef ARCH_x86_64
  27
  28 #define outb(value,port) \
  29 __asm__ ("outb %%al,%%dx"::"a" (value),"d" (port))
  30
  31 #define outw(value,port) \
  32 __asm__ ("outw %%ax,%%dx"::"a" (value),"d" (port))
  33
  34 #define outl(value,port) \
  35 __asm__ ("outl %%eax,%%dx"::"a" (value),"d" (port))
  36
  37 #define inb(port) ({ \
  38 unsigned char _v; \
  39 __asm__ volatile ("inb %%dx,%%al":"=a" (_v):"d" (port)); \
  40 _v; \
  41 })
  42
  43 #define inw(port) ({ \
  44 unsigned short _v; \
  45 __asm__ volatile ("inw %%dx,%%ax":"=a" (_v):"d" (port)); \
  46 _v; \
  47 })
  48
  49 #define inl(port) ({ \
  50 unsigned int _v; \
  51 __asm__ volatile ("inl %%dx,%%eax":"=a" (_v):"d" (port)); \
  52 _v; \
  53 })
  54
  55 #define outb_p(value,port) \
  56 __asm__ ("outb %%al,%%dx\n" \
  57                 "\tjmp 1f\n" \
  58                 "1:\tjmp 1f\n" \
  59                 "1:"::"a" (value),"d" (port))
  60
  61 #define inb_p(port) ({ \
  62 unsigned char _v; \
  63 __asm__ volatile ("inb %%dx,%%al\n" \
  64         "\tjmp 1f\n" \
  65         "1:\tjmp 1f\n" \
  66         "1:":"=a" (_v):"d" (port)); \
  67 _v; \
  68 })
  69
  70 #define outw_p(value,port) \
  71 __asm__ ("outw %%ax,%%dx\n" \
  72                 "\tjmp 1f\n" \
  73                 "1:\tjmp 1f\n" \
  74                 "1:"::"a" (value),"dN" (port))
  75
  76
  77 struct regs {
  78         unsigned long gs;
  79         unsigned long fs;
  80         unsigned long es;
  81         unsigned long ds;
  82         unsigned long r15;
  83         unsigned long r14;
  84         unsigned long r13;
  85         unsigned long r12;
  86         unsigned long r11;
  87         unsigned long r10;
  88         unsigned long r9;
  89         unsigned long r8;
  90         unsigned long rdi;
  91         unsigned long rsi;
  92         unsigned long rbp;
  93         unsigned long rsp;
  94         unsigned long rbx;
  95         unsigned long rdx;
  96         unsigned long rcx;
  97         unsigned long rax;
  98         unsigned long int_no;
  99         unsigned long err_code;
 100         unsigned long rip;
 101         unsigned long cs;
 102         unsigned long eflags;
 103         unsigned long useresp;
 104         unsigned long ss;
 105 };
 106
 107 #define _set_gate(gate_addr, type, dpl, addr) \
 108 __asm__ ("movw %%dx,%%ax\n\t" \
 109         "movw %0,%%dx\n\t" \
 110         "movl %%eax,%1\n\t" \
 111         "movl %%edx,%2" \
 112         : \
 113         : "i" ((short) (0x8000+(dpl<<13)+(type<<8))), \
 114         "o" (*((char *) (gate_addr))), \
 115         "o" (*(4+(char *) (gate_addr))), \
 116         "d" ((char *) (addr)),"a" (0x00080000))
 117
 118 #endif
 119
 120 #endif
 121