1 /* 2 * Copyright 2018, Jérôme Duval, jerome.duval@gmail.com. 3 * Copyright 2002-2009, Axel Dörfler, 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 37 #define x86_write_cr3(value) \ 38 __asm__("mov %0,%%cr3" : : "r" (value)) 39 40 #define x86_read_cr4() ({ \ 41 size_t _v; \ 42 __asm__("mov %%cr4,%0" : "=r" (_v)); \ 43 _v; \ 44 }) 45 46 #define x86_write_cr4(value) \ 47 __asm__("mov %0,%%cr4" : : "r" (value)) 48 49 #define x86_read_dr3() ({ \ 50 size_t _v; \ 51 __asm__("mov %%dr3,%0" : "=r" (_v)); \ 52 _v; \ 53 }) 54 55 #define x86_write_dr3(value) \ 56 __asm__("mov %0,%%dr3" : : "r" (value)) 57 58 #define invalidate_TLB(va) \ 59 __asm__("invlpg (%0)" : : "r" (va)) 60 61 #define wbinvd() \ 62 __asm__ volatile ("wbinvd" : : : "memory") 63 64 #define set_ac() \ 65 __asm__ volatile (ASM_STAC : : : "memory") 66 67 #define clear_ac() \ 68 __asm__ volatile (ASM_CLAC : : : "memory") 69 70 #define xgetbv(reg) ({ \ 71 uint32 low, high; \ 72 __asm__ volatile ("xgetbv" : "=a" (low), "=d" (high), "c" (reg)); \ 73 (low | (uint64)high << 32); \ 74 }) 75 76 #define xsetbv(reg, value) { \ 77 uint32 low = value; uint32 high = value >> 32; \ 78 __asm__ volatile ("xsetbv" : : "a" (low), "d" (high), "c" (reg)); } 79 80 #define out8(value,port) \ 81 __asm__ ("outb %%al,%%dx" : : "a" (value), "d" (port)) 82 83 #define out16(value,port) \ 84 __asm__ ("outw %%ax,%%dx" : : "a" (value), "d" (port)) 85 86 #define out32(value,port) \ 87 __asm__ ("outl %%eax,%%dx" : : "a" (value), "d" (port)) 88 89 #define in8(port) ({ \ 90 uint8 _v; \ 91 __asm__ volatile ("inb %%dx,%%al" : "=a" (_v) : "d" (port)); \ 92 _v; \ 93 }) 94 95 #define in16(port) ({ \ 96 uint16 _v; \ 97 __asm__ volatile ("inw %%dx,%%ax":"=a" (_v) : "d" (port)); \ 98 _v; \ 99 }) 100 101 #define in32(port) ({ \ 102 uint32 _v; \ 103 __asm__ volatile ("inl %%dx,%%eax":"=a" (_v) : "d" (port)); \ 104 _v; \ 105 }) 106 107 #define out8_p(value,port) \ 108 __asm__ ("outb %%al,%%dx\n" \ 109 "\tjmp 1f\n" \ 110 "1:\tjmp 1f\n" \ 111 "1:" : : "a" (value), "d" (port)) 112 113 #define in8_p(port) ({ \ 114 uint8 _v; \ 115 __asm__ volatile ("inb %%dx,%%al\n" \ 116 "\tjmp 1f\n" \ 117 "1:\tjmp 1f\n" \ 118 "1:" : "=a" (_v) : "d" (port)); \ 119 _v; \ 120 }) 121 122 123 #endif /* _KERNEL_ARCH_x86_CPUASM_H */ 124