annotate src/asmops.h @ 29:8ea6debe4265
starting on the task switching implementation
| author |
John Tsiombikas <nuclear@siggraph.org> |
| date |
Sat, 23 Apr 2011 00:51:18 +0300 |
| parents |
86781ef20689 |
| children |
e70b1ab9613e |
| rev |
line source |
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1 #ifndef ASMOPS_H_
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2 #define ASMOPS_H_
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3
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4 #define enable_intr() asm volatile("sti")
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5 #define disable_intr() asm volatile("cli")
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6 #define halt_cpu() asm volatile("hlt")
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7
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8 #define inb(dest, port) asm volatile( \
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9 "inb %1, %0\n\t" \
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10 : "=a" ((unsigned char)(dest)) \
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11 : "dN" ((unsigned short)(port)))
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12
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13 #define inw(dest, port) asm volatile( \
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14 "inw %1, %0\n\t" \
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15 : "=a" ((unsigned short)(dest)) \
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16 : "dN" ((unsigned short)(port)))
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17
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18 #define inl(dest, port) asm volatile( \
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19 "inl %1, %0\n\t" \
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20 : "=a" ((unsigned long)(dest)) \
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21 : "dN" ((unsigned short)(port)))
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22
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23 #define outb(src, port) asm volatile( \
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24 "outb %0, %1\n\t" \
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25 :: "a" ((unsigned char)(src)), "dN" ((unsigned short)(port)))
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26
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27 #define outw(src, port) asm volatile( \
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28 "outw %0, %1\n\t" \
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29 :: "a" ((unsigned short)(src)), "dN" ((unsigned short)(port)))
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30
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31 #define outl(src, port) asm volatile( \
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32 "outl %0, %1\n\t" \
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33 :: "a" ((unsigned long)(src)), "dN" ((unsigned short)(port)))
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34
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35 #endif /* ASMOPS_H_ */
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