port.cpp

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#include <hardwarecommunication/port.h>
 
using namespace MaxOS::hardwarecommunication;
 
Port::Port(uint16_t port_number)
: m_port_number(port_number)
{
}
 
Port::~Port() = default;
 
Port8Bit::Port8Bit(uint16_t port_number)
: Port(port_number) {
}
 
Port8Bit::~Port8Bit() = default;
 
void Port8Bit::write(uint8_t data) {
 
    asm volatile("outb %0, %1" : : "a" (data), "Nd" (m_port_number));
}
 
uint8_t Port8Bit::read() {
 
    uint8_t result;
    asm volatile("inb %1, %0" : "=a" (result) : "Nd" (m_port_number));
    return result;
}
 
Port8BitSlow::Port8BitSlow(uint16_t port_number)
: Port8Bit(port_number) {
}
 
Port8BitSlow::~Port8BitSlow() = default;
 
void Port8BitSlow::write(uint8_t data) {
 
    asm volatile("outb %0, %1\njmp 1f\n1: jmp 1f\n1:" : : "a" (data), "Nd" (m_port_number));
}
 
Port16Bit::Port16Bit(uint16_t port_number)
: Port(port_number) {
}
 
Port16Bit::~Port16Bit() = default;
 
void Port16Bit::write(uint16_t data) {
 
    asm volatile("outw %0, %1" : : "a" (data), "Nd" (m_port_number));
}
 
uint16_t Port16Bit::read() {
 
    uint16_t result;
    asm volatile("inw %1, %0" : "=a" (result) : "Nd" (m_port_number));
    return result;
}
 
Port32Bit::Port32Bit(uint16_t port_number)
: Port(port_number) {
}
 
Port32Bit::~Port32Bit() = default;
 
void Port32Bit::write(uint32_t data) {
 
    asm volatile("outl %0, %1" : : "a" (data), "Nd" (m_port_number));
}
 
uint32_t Port32Bit::read() {
 
    uint32_t result;
    asm volatile("inl %1, %0" : "=a" (result) : "Nd" (m_port_number));
    return result;
}