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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 #include <inttypes.h>
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5
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6 /* general purpose registers as they are pushed by pusha */
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7 struct registers {
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8 uint32_t edi, esi, ebp, esp;
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9 uint32_t ebx, edx, ecx, eax;
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10 } __attribute__ ((packed));
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11
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12 #define enable_intr() asm volatile("sti")
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13 #define disable_intr() asm volatile("cli")
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14 #define halt_cpu() asm volatile("hlt")
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15
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16 #define inb(dest, port) asm volatile( \
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17 "inb %1, %0\n\t" \
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18 : "=a" ((unsigned char)(dest)) \
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19 : "dN" ((unsigned short)(port)))
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20
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21 #define inw(dest, port) asm volatile( \
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22 "inw %1, %0\n\t" \
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23 : "=a" ((unsigned short)(dest)) \
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24 : "dN" ((unsigned short)(port)))
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25
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26 #define inl(dest, port) asm volatile( \
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27 "inl %1, %0\n\t" \
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28 : "=a" ((unsigned long)(dest)) \
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29 : "dN" ((unsigned short)(port)))
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30
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31 #define outb(src, port) asm volatile( \
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32 "outb %0, %1\n\t" \
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33 :: "a" ((unsigned char)(src)), "dN" ((unsigned short)(port)))
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34
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35 #define outw(src, port) asm volatile( \
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36 "outw %0, %1\n\t" \
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37 :: "a" ((unsigned short)(src)), "dN" ((unsigned short)(port)))
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38
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39 #define outl(src, port) asm volatile( \
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40 "outl %0, %1\n\t" \
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41 :: "a" ((unsigned long)(src)), "dN" ((unsigned short)(port)))
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42
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43 #define iodelay() outb(0, 0x80)
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44
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45 #endif /* ASMOPS_H_ */
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