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#include <stdint.h>
#include <kernel/system.h>
uint8_t inb(uint16_t port)
{
uint8_t value;
asm ("inb %1, %0" : "=a"(value) : "Nd"(port));
return value;
}
uint16_t inw(uint16_t port)
{
uint16_t value;
asm ("inw %1, %0" : "=a"(value) : "Nd"(port));
return value;
}
uint32_t inl(uint16_t port)
{
uint32_t value;
asm ("inl %1, %0" : "=a"(value) : "Nd"(port));
return value;
}
void cli()
{
asm volatile ("cli");
}
void sti()
{
asm volatile ("sti");
}
void hlt()
{
asm volatile ("hlt");
}
void outb(uint16_t port, uint8_t data)
{
asm ("outb %0, %1"::"a" (data), "Nd"(port));
}
void outw(uint16_t port, uint16_t data)
{
asm ("outw %0, %1"::"a" (data), "Nd"(port));
}
void outl(uint16_t port, uint32_t data)
{
asm ("outl %0, %1"::"a" (data), "Nd"(port));
}
void init_serial()
{
outb(0x3f8 + 1, 0x00);
outb(0x3f8 + 3, 0x80);
outb(0x3f8 + 0, 0x03);
outb(0x3f8 + 1, 0x00);
outb(0x3f8 + 3, 0x03);
outb(0x3f8 + 2, 0xC7);
outb(0x3f8 + 4, 0x0B);
vga_log("Installed serial connection");
}
int is_transmit_empty()
{
return inb(0x3f8 + 5) & 0x20;
}
void serial_put(char ch)
{
while (is_transmit_empty() == 0);
outb(0x3f8, (uint8_t) ch);
}
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