create Port interface

main
Clyne 3 months ago
parent b480537a27
commit b9d2cef904
Signed by: clyne
GPG Key ID: 1B74EE6C49C96795

@ -10,6 +10,7 @@
extern TextOutput& term;
static CircularBuffer<char> keyboardBuffer;
static Port<0x60> keyboardPort;
static const std::array<char, 0x59> ScanCodeSet1 {{
0, K_ESCAPE,
@ -38,7 +39,7 @@ void keyboard_initialize()
keyboardBuffer = CircularBuffer<char>(128);
idt_register_callback(33, [](auto& regs) {
const auto kc = inb(0x60);
const std::uint8_t kc = keyboardPort;
if (!isReleased(kc)) {
const auto ch = ScanCodeSet1[keycode(kc)];

@ -5,13 +5,25 @@
inline void outb(std::uint16_t port, std::uint8_t val)
{
asm volatile("outb %b0, %w1" :: "a"(val), "Nd"(port) : "memory");
asm volatile("out %%al, %%dx" :: "a"(val), "Nd"(port) : "memory");
}
inline std::uint8_t inb(std::uint16_t port)
{
std::uint8_t val;
asm volatile("inb %w1, %b0" : "=a"(val) : "Nd"(port) : "memory");
asm volatile("inb %%dx" : "=a"(val) : "Nd"(port) : "memory");
return val;
}
inline void outw(std::uint16_t port, std::uint16_t val)
{
asm volatile("out %%ax, %%dx" :: "a"(val), "Nd"(port) : "memory");
}
inline std::uint16_t inw(std::uint16_t port)
{
std::uint16_t val;
asm volatile("inw %%dx" : "=a"(val) : "Nd"(port) : "memory");
return val;
}
@ -20,5 +32,41 @@ inline void io_wait()
outb(0x80, 0);
}
template<std::uint16_t Addr>
struct Port
{
Port() = default;
template<typename T>
auto operator=(T val) noexcept {
if constexpr (sizeof(T) == 1)
outb(Addr, val);
else if constexpr (sizeof(T) == 2)
outw(Addr, val);
return *this;
}
template<typename T>
operator T() const noexcept {
if constexpr (sizeof(T) == 1)
return inb(Addr);
else if constexpr (sizeof(T) == 2)
return inw(Addr);
}
template<typename T>
bool operator==(T val) const noexcept {
T dat = *this;
return dat == val;
}
template<typename T>
auto operator&(T val) const noexcept {
T dat = *this;
return dat & val;
}
};
#endif // PORTIO_HPP

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