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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 | |
| 206 | palkovsky | 39 | |
| 173 | jermar | 40 | /* TODO: implement the real stuff */ |
| 41 | static inline __address get_stack_base(void) |
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| 42 | { |
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| 43 | return NULL; |
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| 44 | } |
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| 45 | |||
| 197 | palkovsky | 46 | static inline void cpu_sleep(void) { __asm__("hlt"); }; |
| 47 | |||
| 200 | palkovsky | 48 | |
| 49 | static inline __u8 inb(__u16 port) |
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| 50 | { |
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| 51 | __u8 out; |
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| 52 | |||
| 53 | asm ( |
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| 54 | "mov %0, %%dx;" |
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| 55 | "inb %%dx,%%al;" |
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| 56 | "mov %%al, %1;" |
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| 57 | :"=m"(out) |
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| 58 | :"m"(port) |
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| 206 | palkovsky | 59 | :"%dx","%al" |
| 200 | palkovsky | 60 | ); |
| 61 | return out; |
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| 62 | } |
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| 63 | |||
| 64 | static inline __u8 outb(__u16 port,__u8 b) |
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| 65 | { |
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| 66 | asm ( |
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| 67 | "mov %0,%%dx;" |
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| 68 | "mov %1,%%al;" |
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| 69 | "outb %%al,%%dx;" |
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| 70 | : |
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| 71 | :"m"( port), "m" (b) |
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| 206 | palkovsky | 72 | :"%dx","%al" |
| 200 | palkovsky | 73 | ); |
| 74 | } |
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| 75 | |||
| 76 | /** Set priority level low |
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| 77 | * |
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| 78 | * Enable interrupts and return previous |
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| 79 | * value of EFLAGS. |
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| 80 | */ |
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| 81 | static inline pri_t cpu_priority_low(void) { |
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| 82 | pri_t v; |
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| 83 | __asm__ volatile ( |
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| 84 | "pushfq\n" |
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| 85 | "popq %0\n" |
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| 86 | "sti\n" |
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| 87 | : "=r" (v) |
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| 88 | ); |
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| 89 | return v; |
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| 90 | } |
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| 91 | |||
| 92 | /** Set priority level high |
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| 93 | * |
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| 94 | * Disable interrupts and return previous |
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| 95 | * value of EFLAGS. |
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| 96 | */ |
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| 97 | static inline pri_t cpu_priority_high(void) { |
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| 98 | pri_t v; |
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| 99 | __asm__ volatile ( |
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| 100 | "pushfq\n" |
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| 101 | "popq %0\n" |
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| 102 | "cli\n" |
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| 103 | : "=r" (v) |
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| 104 | ); |
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| 105 | return v; |
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| 106 | } |
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| 107 | |||
| 108 | /** Restore priority level |
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| 109 | * |
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| 110 | * Restore EFLAGS. |
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| 111 | */ |
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| 112 | static inline void cpu_priority_restore(pri_t pri) { |
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| 113 | __asm__ volatile ( |
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| 114 | "pushq %0\n" |
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| 115 | "popfq\n" |
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| 116 | : : "r" (pri) |
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| 117 | ); |
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| 118 | } |
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| 119 | |||
| 206 | palkovsky | 120 | /** Return raw priority level |
| 121 | * |
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| 122 | * Return EFLAFS. |
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| 123 | */ |
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| 124 | static inline pri_t cpu_priority_read(void) { |
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| 125 | pri_t v; |
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| 126 | __asm__ volatile ( |
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| 127 | "pushfq\n" |
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| 128 | "popq %0\n" |
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| 129 | : "=r" (v) |
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| 130 | ); |
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| 131 | return v; |
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| 132 | } |
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| 200 | palkovsky | 133 | |
| 216 | palkovsky | 134 | /** Read CR2 |
| 135 | * |
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| 136 | * Return value in CR2 |
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| 137 | * |
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| 138 | * @return Value read. |
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| 139 | */ |
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| 140 | static inline __u32 read_cr2(void) { __u64 v; __asm__ volatile ("movq %%cr2,%0" : "=r" (v)); return v; } |
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| 141 | |||
| 142 | |||
| 206 | palkovsky | 143 | extern size_t interrupt_handler_size; |
| 144 | extern void interrupt_handlers(void); |
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| 145 | |||
| 173 | jermar | 146 | #endif |