LXR qemu/pc-bios/optionrom/optrom.h

   1/*
   2 * Common Option ROM Functions for C code
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License as published by
   6 * the Free Software Foundation; either version 2 of the License, or
   7 * (at your option) any later version.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
  16 *
  17 * Copyright (c) 2015-2019 Red Hat Inc.
  18 *   Authors:
  19 *     Marc Marí <marc.mari.barcelo@gmail.com>
  20 *     Richard W.M. Jones <rjones@redhat.com>
  21 *     Stefano Garzarella <sgarzare@redhat.com>
  22 */
  23
  24#ifndef OPTROM_H
  25#define OPTROM_H
  26
  27#include <stdint.h>
  28#include "../../include/standard-headers/linux/qemu_fw_cfg.h"
  29
  30#define barrier() asm("" : : : "memory")
  31
  32#ifdef __clang__
  33#define ADDR32
  34#else
  35#define ADDR32 "addr32 "
  36#endif
  37
  38static inline void outb(uint8_t value, uint16_t port)
  39{
  40    asm volatile("outb %0, %w1" : : "a"(value), "Nd"(port));
  41}
  42
  43static inline void outw(uint16_t value, uint16_t port)
  44{
  45    asm volatile("outw %0, %w1" : : "a"(value), "Nd"(port));
  46}
  47
  48static inline void outl(uint32_t value, uint16_t port)
  49{
  50    asm volatile("outl %0, %w1" : : "a"(value), "Nd"(port));
  51}
  52
  53static inline uint8_t inb(uint16_t port)
  54{
  55    uint8_t value;
  56
  57    asm volatile("inb %w1, %0" : "=a"(value) : "Nd"(port));
  58    return value;
  59}
  60
  61static inline uint16_t inw(uint16_t port)
  62{
  63    uint16_t value;
  64
  65    asm volatile("inw %w1, %0" : "=a"(value) : "Nd"(port));
  66    return value;
  67}
  68
  69static inline uint32_t inl(uint16_t port)
  70{
  71    uint32_t value;
  72
  73    asm volatile("inl %w1, %0" : "=a"(value) : "Nd"(port));
  74    return value;
  75}
  76
  77static inline void insb(uint16_t port, uint8_t *buf, uint32_t len)
  78{
  79    asm volatile("rep insb %%dx, %%es:(%%edi)"
  80                 : "+c"(len), "+D"(buf) : "d"(port) : "memory");
  81}
  82
  83static inline uint32_t bswap32(uint32_t x)
  84{
  85    asm("bswapl %0" : "=r" (x) : "0" (x));
  86    return x;
  87}
  88
  89static inline uint64_t bswap64(uint64_t x)
  90{
  91    asm("bswapl %%eax; bswapl %%edx; xchg %%eax, %%edx" : "=A" (x) : "0" (x));
  92    return x;
  93}
  94
  95static inline uint64_t cpu_to_be64(uint64_t x)
  96{
  97    return bswap64(x);
  98}
  99
 100static inline uint32_t cpu_to_be32(uint32_t x)
 101{
 102    return bswap32(x);
 103}
 104
 105static inline uint32_t be32_to_cpu(uint32_t x)
 106{
 107    return bswap32(x);
 108}
 109
 110#endif /* OPTROM_H */
 111