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
outb(uint8_t value,uint16_t port)38 static inline void outb(uint8_t value, uint16_t port)
39 {
40 asm volatile("outb %0, %w1" : : "a"(value), "Nd"(port));
41 }
42
outw(uint16_t value,uint16_t port)43 static inline void outw(uint16_t value, uint16_t port)
44 {
45 asm volatile("outw %0, %w1" : : "a"(value), "Nd"(port));
46 }
47
outl(uint32_t value,uint16_t port)48 static inline void outl(uint32_t value, uint16_t port)
49 {
50 asm volatile("outl %0, %w1" : : "a"(value), "Nd"(port));
51 }
52
inb(uint16_t port)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
inw(uint16_t port)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
inl(uint16_t port)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
insb(uint16_t port,uint8_t * buf,uint32_t len)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
bswap32(uint32_t x)83 static inline uint32_t bswap32(uint32_t x)
84 {
85 asm("bswapl %0" : "=r" (x) : "0" (x));
86 return x;
87 }
88
bswap64(uint64_t x)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
cpu_to_be64(uint64_t x)95 static inline uint64_t cpu_to_be64(uint64_t x)
96 {
97 return bswap64(x);
98 }
99
cpu_to_be32(uint32_t x)100 static inline uint32_t cpu_to_be32(uint32_t x)
101 {
102 return bswap32(x);
103 }
104
be32_to_cpu(uint32_t x)105 static inline uint32_t be32_to_cpu(uint32_t x)
106 {
107 return bswap32(x);
108 }
109
110 #endif /* OPTROM_H */
111