1/* 2 * Copyright 2018, J��r��me Duval, jerome.duval@gmail.com. 3 * Copyright 2002-2009, Axel D��rfler, axeld@pinc-software.de. 4 * Copyright 2012, Alex Smith, alex@alex-smith.me.uk. 5 * Distributed under the terms of the MIT License. 6 * 7 * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved. 8 * Distributed under the terms of the NewOS License. 9 */ 10#ifndef _KERNEL_ARCH_x86_CPUASM_H 11#define _KERNEL_ARCH_x86_CPUASM_H 12 13 14#define nop() __asm__ ("nop"::) 15 16#define x86_read_cr0() ({ \ 17 size_t _v; \ 18 __asm__("mov %%cr0,%0" : "=r" (_v)); \ 19 _v; \ 20}) 21 22#define x86_write_cr0(value) \ 23 __asm__("mov %0,%%cr0" : : "r" (value)) 24 25#define x86_read_cr2() ({ \ 26 size_t _v; \ 27 __asm__("mov %%cr2,%0" : "=r" (_v)); \ 28 _v; \ 29}) 30 31#define x86_read_cr3() ({ \ 32 size_t _v; \ 33 __asm__("mov %%cr3,%0" : "=r" (_v)); \ 34 _v; \ 35}) 36 37static inline void 38x86_write_cr3(size_t value) 39{ 40 __asm__("mov %0,%%cr3" : : "r" (value) : "memory"); 41} 42 43#define x86_read_cr4() ({ \ 44 size_t _v; \ 45 __asm__("mov %%cr4,%0" : "=r" (_v)); \ 46 _v; \ 47}) 48 49#define x86_write_cr4(value) \ 50 __asm__("mov %0,%%cr4" : : "r" (value)) 51 52#define x86_read_dr3() ({ \ 53 size_t _v; \ 54 __asm__("mov %%dr3,%0" : "=r" (_v)); \ 55 _v; \ 56}) 57 58#define x86_write_dr3(value) \ 59 __asm__("mov %0,%%dr3" : : "r" (value)) 60 61#define invalidate_TLB(va) \ 62 __asm__("invlpg (%0)" : : "r" (va)) 63 64#define wbinvd() \ 65 __asm__ volatile ("wbinvd" : : : "memory") 66 67#define set_ac() \ 68 __asm__ volatile (ASM_STAC : : : "memory") 69 70#define clear_ac() \ 71 __asm__ volatile (ASM_CLAC : : : "memory") 72 73#define xgetbv(reg) ({ \ 74 uint32 low, high; \ 75 __asm__ volatile ("xgetbv" : "=a" (low), "=d" (high), "c" (reg)); \ 76 (low | (uint64)high << 32); \ 77}) 78 79#define xsetbv(reg, value) { \ 80 uint32 low = value; uint32 high = value >> 32; \ 81 __asm__ volatile ("xsetbv" : : "a" (low), "d" (high), "c" (reg)); } 82 83#define out8(value,port) \ 84 __asm__ ("outb %%al,%%dx" : : "a" (value), "d" (port)) 85 86#define out16(value,port) \ 87 __asm__ ("outw %%ax,%%dx" : : "a" (value), "d" (port)) 88 89#define out32(value,port) \ 90 __asm__ ("outl %%eax,%%dx" : : "a" (value), "d" (port)) 91 92#define in8(port) ({ \ 93 uint8 _v; \ 94 __asm__ volatile ("inb %%dx,%%al" : "=a" (_v) : "d" (port)); \ 95 _v; \ 96}) 97 98#define in16(port) ({ \ 99 uint16 _v; \ 100 __asm__ volatile ("inw %%dx,%%ax":"=a" (_v) : "d" (port)); \ 101 _v; \ 102}) 103 104#define in32(port) ({ \ 105 uint32 _v; \ 106 __asm__ volatile ("inl %%dx,%%eax":"=a" (_v) : "d" (port)); \ 107 _v; \ 108}) 109 110#define out8_p(value,port) \ 111 __asm__ ("outb %%al,%%dx\n" \ 112 "\tjmp 1f\n" \ 113 "1:\tjmp 1f\n" \ 114 "1:" : : "a" (value), "d" (port)) 115 116#define in8_p(port) ({ \ 117 uint8 _v; \ 118 __asm__ volatile ("inb %%dx,%%al\n" \ 119 "\tjmp 1f\n" \ 120 "1:\tjmp 1f\n" \ 121 "1:" : "=a" (_v) : "d" (port)); \ 122 _v; \ 123}) 124 125 126#endif /* _KERNEL_ARCH_x86_CPUASM_H */ 127