| 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 */ |