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
  38 static inline void outb(uint8_t value, uint16_t port)
  39 {
  40     asm volatile("outb %0, %w1" : : "a"(value), "Nd"(port));
  41 }
  42
  43 static inline void outw(uint16_t value, uint16_t port)
  44 {
  45     asm volatile("outw %0, %w1" : : "a"(value), "Nd"(port));
  46 }
  47
  48 static inline void outl(uint32_t value, uint16_t port)
  49 {
  50     asm volatile("outl %0, %w1" : : "a"(value), "Nd"(port));
  51 }
  52
  53 static 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
  61 static 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
  69 static 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
  77 static 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
  83 static inline uint32_t bswap32(uint32_t x)
  84 {
  85     asm("bswapl %0" : "=r" (x) : "0" (x));
  86     return x;
  87 }
  88
  89 static 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
  95 static inline uint64_t cpu_to_be64(uint64_t x)
  96 {
  97     return bswap64(x);
  98 }
  99
 100 static inline uint32_t cpu_to_be32(uint32_t x)
 101 {
 102     return bswap32(x);
 103 }
 104
 105 static inline uint32_t be32_to_cpu(uint32_t x)
 106 {
 107     return bswap32(x);
 108 }
 109
 110 #endif /* OPTROM_H */