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Import the "gerbert" kernel I worked on earlier this year.
It's a lot crappier than I remembered it. It's gonna need a lot of work.
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Kernel/IO.cpp
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41
Kernel/IO.cpp
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#include "IO.h"
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namespace IO {
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BYTE in8(WORD port)
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{
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BYTE value;
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asm("inb %%dx, %%al":"=a"(value):"d"(port));
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return value;
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}
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WORD in16(WORD port)
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{
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WORD value;
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asm("inw %%dx, %%ax":"=a"(value):"d"(port));
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return value;
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}
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DWORD in32(DWORD port)
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{
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DWORD value;
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asm("inl %%dx, %%eax":"=a"(value):"d"(port));
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return value;
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}
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void out8(WORD port, BYTE value)
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{
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asm("outb %%al, %%dx"::"d"(port), "a"(value));
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}
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void out16(WORD port, WORD value)
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{
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asm("outw %%ax, %%dx"::"d"(port), "a"(value));
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}
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void out32(WORD port, WORD value)
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{
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asm("outl %%eax, %%dx"::"d"(port), "a"(value));
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}
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}
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