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 */ 111