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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
25 lines
543 B
C++
25 lines
543 B
C++
#pragma once
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#include <stdint.h>
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extern "C" {
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/// Read a byte from an IO port.
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/// \arg port The address of the IO port
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/// \returns One byte read from the port
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uint8_t inb(uint16_t port);
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/// Write a byte to an IO port.
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/// \arg port The addres of the IO port
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/// \arg val The byte to write
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void outb(uint16_t port, uint8_t val);
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/// Pause briefly by doing IO to port 0x80
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/// \arg times Number of times to delay by writing
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void io_wait(unsigned times = 1);
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}
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constexpr uint16_t COM1 = 0x03f8;
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constexpr uint16_t COM2 = 0x02f8;
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