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kernel: move UART code in each arch subdir

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Signed-off-by: EnderIce2 <enderice2@protonmail.com>
This commit is contained in:
EnderIce2 2025-01-24 15:26:21 +02:00
parent 72232d8bd2
commit 495a0ea609
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GPG Key ID: 2EE20AF089811A5A
4 changed files with 218 additions and 14 deletions
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46
Kernel/arch/aarch64/core/uart.cpp Normal file
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@ -0,0 +1,46 @@
/*
This file is part of Fennix Kernel.
Fennix Kernel is free software: you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.
Fennix Kernel is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
*/
#include <uart.hpp>
#include <io.h>
namespace UART
{
void Driver::DebugWrite(uint8_t Char)
{
}
uint8_t Driver::DebugRead()
{
return 0;
}
void Driver::TTYWrite(uint8_t Char)
{
}
uint8_t Driver::TTYRead()
{
return 0;
}
Driver::Driver()
{
}
Driver::~Driver() {}
}

14
Kernel/core/uart.cpp → Kernel/arch/amd64/core/uart.cpp
View File

@ -45,53 +45,40 @@ namespace UART
{
if (!DebugAvailable)
return;
#if defined(__amd64__) || defined(__i386__)
while ((inb(s_cst(uint16_t, COM1 + 5)) & SERIAL_BUFFER_EMPTY) == 0)
;
outb(COM1, Char);
#endif
}
uint8_t Driver::DebugRead()
{
if (!DebugAvailable)
return 0;
#if defined(__amd64__) || defined(__i386__)
while ((inb(s_cst(uint16_t, COM1 + 5)) & 1) == 0)
;
return inb(COM1);
#else
return 0;
#endif
}
void Driver::TTYWrite(uint8_t Char)
{
if (!TTYAvailable)
return;
#if defined(__amd64__) || defined(__i386__)
while ((inb(s_cst(uint16_t, COM4 + 5)) & SERIAL_BUFFER_EMPTY) == 0)
;
outb(COM4, Char);
#endif
}
uint8_t Driver::TTYRead()
{
if (!TTYAvailable)
return 0;
#if defined(__amd64__) || defined(__i386__)
while ((inb(s_cst(uint16_t, COM4 + 5)) & 1) == 0)
;
return inb(COM4);
#else
return 0;
#endif
}
Driver::Driver()
{
#if defined(__amd64__) || defined(__i386__)
auto initPort = [](uint16_t Port)
{
// Initialize the serial port
@ -133,7 +120,6 @@ namespace UART
initPort(COM4);
TTYAvailable = true;
}
#endif
}
Driver::~Driver() {}

46
Kernel/arch/arm/core/uart.cpp Normal file
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@ -0,0 +1,46 @@
/*
This file is part of Fennix Kernel.
Fennix Kernel is free software: you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.
Fennix Kernel is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
*/
#include <uart.hpp>
#include <io.h>
namespace UART
{
void Driver::DebugWrite(uint8_t Char)
{
}
uint8_t Driver::DebugRead()
{
return 0;
}
void Driver::TTYWrite(uint8_t Char)
{
}
uint8_t Driver::TTYRead()
{
return 0;
}
Driver::Driver()
{
}
Driver::~Driver() {}
}

126
Kernel/arch/i386/core/uart.cpp Normal file
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@ -0,0 +1,126 @@
/*
This file is part of Fennix Kernel.
Fennix Kernel is free software: you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.
Fennix Kernel is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
*/
#include <uart.hpp>
#include <io.h>
namespace UART
{
enum SerialPorts
{
COM1 = 0x3F8,
COM2 = 0x2F8,
COM3 = 0x3E8,
COM4 = 0x2E8,
COM5 = 0x5F8,
COM6 = 0x4F8,
COM7 = 0x5E8,
COM8 = 0x4E8
};
#define SERIAL_ENABLE_DLAB 0x80
#define SERIAL_RATE_115200_LO 0x01
#define SERIAL_RATE_115200_HI 0x00
#define SERIAL_RATE_57600_LO 0x02
#define SERIAL_RATE_57600_HI 0x00
#define SERIAL_RATE_38400_LO 0x03
#define SERIAL_RATE_38400_HI 0x00
#define SERIAL_BUFFER_EMPTY 0x20
void Driver::DebugWrite(uint8_t Char)
{
if (!DebugAvailable)
return;
while ((inb(s_cst(uint16_t, COM1 + 5)) & SERIAL_BUFFER_EMPTY) == 0)
;
outb(COM1, Char);
}
uint8_t Driver::DebugRead()
{
if (!DebugAvailable)
return 0;
while ((inb(s_cst(uint16_t, COM1 + 5)) & 1) == 0)
;
return inb(COM1);
}
void Driver::TTYWrite(uint8_t Char)
{
if (!TTYAvailable)
return;
while ((inb(s_cst(uint16_t, COM4 + 5)) & SERIAL_BUFFER_EMPTY) == 0)
;
outb(COM4, Char);
}
uint8_t Driver::TTYRead()
{
if (!TTYAvailable)
return 0;
while ((inb(s_cst(uint16_t, COM4 + 5)) & 1) == 0)
;
return inb(COM4);
}
Driver::Driver()
{
auto initPort = [](uint16_t Port)
{
// Initialize the serial port
outb(s_cst(uint16_t, Port + 1), 0x00); // Disable all interrupts
outb(s_cst(uint16_t, Port + 3), SERIAL_ENABLE_DLAB); // Enable DLAB (set baud rate divisor)
outb(s_cst(uint16_t, Port + 0), SERIAL_RATE_115200_LO); // Set divisor to 1 (lo byte) 115200 baud
outb(s_cst(uint16_t, Port + 1), SERIAL_RATE_115200_HI); // (hi byte)
outb(s_cst(uint16_t, Port + 3), 0x03); // 8 bits, no parity, one stop bit
outb(s_cst(uint16_t, Port + 2), 0xC7); // Enable FIFO, clear them, with 14-byte threshold
outb(s_cst(uint16_t, Port + 4), 0x0B); // IRQs enabled, RTS/DSR set
/* FIXME https://wiki.osdev.org/Serial_Ports */
// outb(s_cst(uint16_t, Port + 0), 0x1E);
// outb(s_cst(uint16_t, Port + 0), 0xAE);
// Check if the serial port is faulty.
// if (inb(s_cst(uint16_t, Port + 0)) != 0xAE)
// {
// static int once = 0;
// if (!once++)
// warn("Serial port %#lx is faulty.", Port);
// // serialports[Port] = false; // ignore for now
// // return;
// }
// Set to normal operation mode.
outb(s_cst(uint16_t, Port + 4), 0x0F);
};
uint8_t com = inb(COM1);
if (com != 0xFF)
{
initPort(COM1);
DebugAvailable = true;
}
com = inb(COM4);
if (com != 0xFF)
{
initPort(COM4);
TTYAvailable = true;
}
}
Driver::~Driver() {}
}