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| Rev | Author | Line No. | Line |
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| 173 | jermar | 1 | /* |
| 2 | * Copyright (C) 2005 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #ifndef __amd64_ASM_H__ |
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| 30 | #define __amd64_ASM_H__ |
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| 31 | |||
| 32 | #include <arch/types.h> |
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| 33 | #include <config.h> |
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| 34 | |||
| 200 | palkovsky | 35 | |
| 197 | palkovsky | 36 | void asm_delay_loop(__u32 t); |
| 206 | palkovsky | 37 | void asm_fake_loop(__u32 t); |
| 197 | palkovsky | 38 | |
| 173 | jermar | 39 | static inline __address get_stack_base(void) |
| 40 | { |
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| 226 | palkovsky | 41 | __address v; |
| 42 | |||
| 43 | __asm__ volatile ("andq %%rsp, %0\n" : "=r" (v) : "0" (~((__u64)STACK_SIZE-1))); |
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| 44 | |||
| 45 | return v; |
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| 173 | jermar | 46 | } |
| 47 | |||
| 197 | palkovsky | 48 | static inline void cpu_sleep(void) { __asm__("hlt"); }; |
| 224 | palkovsky | 49 | static inline void cpu_halt(void) { __asm__("hlt"); }; |
| 197 | palkovsky | 50 | |
| 200 | palkovsky | 51 | |
| 52 | static inline __u8 inb(__u16 port) |
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| 53 | { |
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| 54 | __u8 out; |
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| 55 | |||
| 56 | asm ( |
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| 226 | palkovsky | 57 | "mov %1, %%dx;" |
| 200 | palkovsky | 58 | "inb %%dx,%%al;" |
| 226 | palkovsky | 59 | "mov %%al, %0;" |
| 200 | palkovsky | 60 | :"=m"(out) |
| 61 | :"m"(port) |
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| 206 | palkovsky | 62 | :"%dx","%al" |
| 200 | palkovsky | 63 | ); |
| 64 | return out; |
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| 65 | } |
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| 66 | |||
| 67 | static inline __u8 outb(__u16 port,__u8 b) |
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| 68 | { |
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| 69 | asm ( |
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| 70 | "mov %0,%%dx;" |
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| 71 | "mov %1,%%al;" |
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| 72 | "outb %%al,%%dx;" |
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| 73 | : |
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| 74 | :"m"( port), "m" (b) |
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| 206 | palkovsky | 75 | :"%dx","%al" |
| 200 | palkovsky | 76 | ); |
| 77 | } |
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| 78 | |||
| 79 | /** Set priority level low |
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| 80 | * |
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| 81 | * Enable interrupts and return previous |
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| 82 | * value of EFLAGS. |
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| 83 | */ |
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| 84 | static inline pri_t cpu_priority_low(void) { |
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| 85 | pri_t v; |
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| 86 | __asm__ volatile ( |
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| 87 | "pushfq\n" |
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| 88 | "popq %0\n" |
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| 89 | "sti\n" |
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| 90 | : "=r" (v) |
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| 91 | ); |
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| 92 | return v; |
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| 93 | } |
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| 94 | |||
| 95 | /** Set priority level high |
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| 96 | * |
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| 97 | * Disable interrupts and return previous |
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| 98 | * value of EFLAGS. |
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| 99 | */ |
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| 100 | static inline pri_t cpu_priority_high(void) { |
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| 101 | pri_t v; |
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| 102 | __asm__ volatile ( |
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| 103 | "pushfq\n" |
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| 104 | "popq %0\n" |
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| 105 | "cli\n" |
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| 106 | : "=r" (v) |
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| 107 | ); |
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| 108 | return v; |
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| 109 | } |
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| 110 | |||
| 111 | /** Restore priority level |
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| 112 | * |
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| 113 | * Restore EFLAGS. |
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| 114 | */ |
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| 115 | static inline void cpu_priority_restore(pri_t pri) { |
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| 116 | __asm__ volatile ( |
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| 117 | "pushq %0\n" |
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| 118 | "popfq\n" |
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| 119 | : : "r" (pri) |
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| 120 | ); |
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| 121 | } |
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| 122 | |||
| 206 | palkovsky | 123 | /** Return raw priority level |
| 124 | * |
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| 125 | * Return EFLAFS. |
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| 126 | */ |
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| 127 | static inline pri_t cpu_priority_read(void) { |
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| 128 | pri_t v; |
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| 129 | __asm__ volatile ( |
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| 130 | "pushfq\n" |
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| 131 | "popq %0\n" |
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| 132 | : "=r" (v) |
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| 133 | ); |
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| 134 | return v; |
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| 135 | } |
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| 200 | palkovsky | 136 | |
| 216 | palkovsky | 137 | /** Read CR2 |
| 138 | * |
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| 139 | * Return value in CR2 |
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| 140 | * |
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| 141 | * @return Value read. |
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| 142 | */ |
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| 224 | palkovsky | 143 | static inline __u64 read_cr2(void) { __u64 v; __asm__ volatile ("movq %%cr2,%0" : "=r" (v)); return v; } |
| 216 | palkovsky | 144 | |
| 219 | palkovsky | 145 | /** Write CR3 |
| 146 | * |
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| 147 | * Write value to CR3. |
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| 148 | * |
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| 149 | * @param v Value to be written. |
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| 150 | */ |
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| 151 | static inline void write_cr3(__u64 v) { __asm__ volatile ("movq %0,%%cr3\n" : : "r" (v)); } |
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| 216 | palkovsky | 152 | |
| 219 | palkovsky | 153 | /** Read CR3 |
| 154 | * |
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| 155 | * Return value in CR3 |
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| 156 | * |
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| 157 | * @return Value read. |
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| 158 | */ |
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| 224 | palkovsky | 159 | static inline __u64 read_cr3(void) { __u64 v; __asm__ volatile ("movq %%cr3,%0" : "=r" (v)); return v; } |
| 219 | palkovsky | 160 | |
| 161 | |||
| 206 | palkovsky | 162 | extern size_t interrupt_handler_size; |
| 163 | extern void interrupt_handlers(void); |
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| 164 | |||
| 173 | jermar | 165 | #endif |