33 lines
728 B
C++
33 lines
728 B
C++
|
#include <riscv/Bus.hpp>
|
||
|
|
#include <riscv/CPU.hpp>
|
||
|
|
#include <riscv/Devices/RamDevice.hpp>
|
||
|
|
|
||
|
|
#include "riscv/Types.hpp"
|
||
|
|
|
||
|
|
/// simple 16550 UART implementation
|
||
|
|
struct SimpleUartDevice : public riscv::Bus::MmioDevice {
|
||
|
|
constexpr static riscv::AddressT BASE_ADDRESS = 0x10000000;
|
||
|
|
|
||
|
|
riscv::AddressT Base() const override { return BASE_ADDRESS; }
|
||
|
|
|
||
|
|
riscv::AddressT Size() const override { return 5; }
|
||
|
|
|
||
|
|
// TODO: emulate properly
|
||
|
|
u32 Peek(riscv::AddressT address) override {
|
||
|
|
switch(address) {
|
||
|
|
case BASE_ADDRESS:
|
||
|
|
break;
|
||
|
|
case BASE_ADDRESS + 5:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void Poke(riscv::AddressT address, u32 value) override {
|
||
|
|
if(address == BASE_ADDRESS) { // write to data buffer
|
||
|
|
printf("%c\n", value);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|