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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); |
| 37 | |||
| 173 | jermar | 38 | /* TODO: implement the real stuff */ |
| 39 | static inline __address get_stack_base(void) |
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| 40 | { |
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| 41 | return NULL; |
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| 42 | } |
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| 43 | |||
| 197 | palkovsky | 44 | static inline void cpu_sleep(void) { __asm__("hlt"); }; |
| 45 | |||
| 200 | palkovsky | 46 | |
| 47 | static inline __u8 inb(__u16 port) |
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| 48 | { |
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| 49 | __u8 out; |
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| 50 | |||
| 51 | asm ( |
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| 52 | "mov %0, %%dx;" |
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| 53 | "inb %%dx,%%al;" |
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| 54 | "mov %%al, %1;" |
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| 55 | :"=m"(out) |
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| 56 | :"m"(port) |
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| 57 | :"dx","al" |
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| 58 | ); |
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| 59 | return out; |
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| 60 | } |
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| 61 | |||
| 62 | static inline __u8 outb(__u16 port,__u8 b) |
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| 63 | { |
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| 64 | asm ( |
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| 65 | "mov %0,%%dx;" |
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| 66 | "mov %1,%%al;" |
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| 67 | "outb %%al,%%dx;" |
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| 68 | : |
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| 69 | :"m"( port), "m" (b) |
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| 70 | :"dx","al" |
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| 71 | ); |
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| 72 | } |
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| 73 | |||
| 74 | /** Set priority level low |
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| 75 | * |
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| 76 | * Enable interrupts and return previous |
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| 77 | * value of EFLAGS. |
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| 78 | */ |
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| 79 | static inline pri_t cpu_priority_low(void) { |
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| 80 | pri_t v; |
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| 81 | __asm__ volatile ( |
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| 82 | "pushfq\n" |
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| 83 | "popq %0\n" |
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| 84 | "sti\n" |
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| 85 | : "=r" (v) |
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| 86 | ); |
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| 87 | return v; |
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| 88 | } |
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| 89 | |||
| 90 | /** Set priority level high |
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| 91 | * |
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| 92 | * Disable interrupts and return previous |
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| 93 | * value of EFLAGS. |
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| 94 | */ |
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| 95 | static inline pri_t cpu_priority_high(void) { |
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| 96 | pri_t v; |
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| 97 | __asm__ volatile ( |
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| 98 | "pushfq\n" |
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| 99 | "popq %0\n" |
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| 100 | "cli\n" |
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| 101 | : "=r" (v) |
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| 102 | ); |
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| 103 | return v; |
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| 104 | } |
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| 105 | |||
| 106 | /** Restore priority level |
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| 107 | * |
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| 108 | * Restore EFLAGS. |
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| 109 | */ |
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| 110 | static inline void cpu_priority_restore(pri_t pri) { |
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| 111 | __asm__ volatile ( |
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| 112 | "pushq %0\n" |
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| 113 | "popfq\n" |
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| 114 | : : "r" (pri) |
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| 115 | ); |
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| 116 | } |
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| 117 | |||
| 118 | |||
| 173 | jermar | 119 | #endif |