Justin C. Miller
1904e240cf
- Add a tag field to all endpoint messages, which doubles as a notification field - Add a endpoint_bind_irq syscall to enable an endpoint to listen for interrupt notifications. This mechanism needs to change. - Add a temporary copy of the serial port code to nulldrv, and let it take responsibility for COM2
23 lines
337 B
C++
23 lines
337 B
C++
#include "io.h"
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uint8_t
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inb(uint16_t port)
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{
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uint8_t val;
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__asm__ __volatile__ ( "inb %1, %0" : "=a"(val) : "Nd"(port) );
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return val;
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}
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void
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outb(uint16_t port, uint8_t val)
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{
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__asm__ __volatile__ ( "outb %0, %1" :: "a"(val), "Nd"(port) );
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}
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void
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io_wait(unsigned times)
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{
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for (unsigned i = 0; i < times; ++i)
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outb(0x80, 0);
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}
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