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Working on memory mapping

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This commit is contained in:
Alex
2022-10-14 01:48:08 +03:00
parent 6cf44540fb
commit 5fbe75636b
17 changed files with 3970 additions and 2 deletions
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66
UEFI/src/Lynx.c
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@ -1,13 +1,79 @@
#include <efi.h>
#include <efilib.h>
#include "Memory/memory.hpp"
#include "FileLoader.h"
#include "printf.h"
void port_byte_out(short unsigned int port, unsigned char value)
{
__asm__ volatile("outb %0, %1"
:
: "a"(value), "Nd"(port));
}
unsigned char port_byte_in(short unsigned int port)
{
unsigned char ReturnValue;
__asm__ volatile("inb %1, %0"
: "=a"(ReturnValue)
: "Nd"(port));
return ReturnValue;
}
int strlen(const char s[])
{
int i = 0;
while (s[i] != '\0')
++i;
return i;
}
int init_serial()
{
// TODO: fix crash on virtualbox (or virtualbox is faulty???????????)
port_byte_out(0x3F8 + 1, 0x00);
port_byte_out(0x3F8 + 3, 0x80);
port_byte_out(0x3F8 + 0, 0x03);
port_byte_out(0x3F8 + 1, 0x00);
port_byte_out(0x3F8 + 3, 0x03);
port_byte_out(0x3F8 + 2, 0xC7);
port_byte_out(0x3F8 + 4, 0x0B);
port_byte_out(0x3F8 + 4, 0x1E);
port_byte_out(0x3F8 + 0, 0xAE);
if (port_byte_in(0x3F8 + 0) != 0xAE)
{
return -1; // serial port is faulty
}
port_byte_out(0x3F8 + 4, 0x0F);
return 0;
}
void printf(const char *format, ...)
{
va_list args;
va_start(args, format);
printf_(format, args);
va_end(args);
}
extern void putchar(char c)
{
while ((port_byte_in(0x3F8 + 5) & 0x20) == 0)
;
port_byte_out(0x3F8, c);
}
EFI_STATUS EFIAPI efi_main(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable)
{
InitializeLib(ImageHandle, SystemTable);
SystemTable->BootServices->SetWatchdogTimer(0, 0, 0, NULL);
Print(L"Lynx Bootloader © EnderIce2 2022\n");
Print(L"UEFI not implemented\n");
while (1)
asm("hlt");
InitializeMemoryManagement(ImageHandle, SystemTable);
EFI_FILE *Kernel = LoadFile(NULL, L"kernel.fsys", ImageHandle, SystemTable);
if (Kernel == NULL)