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