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#include <stdint.h>
#include "kprintf.h"
#include "gdt.h"
#include "idt.h"
#include "acpi.h"
#include "asm_inline.h"
typedef struct _OSDATA
{
uint32_t Magic; // magic number to check
uint32_t FBWidth; // with of the framebuffer
uint32_t FBHeight; // height
uint32_t PixelSize; // size of each pixel(an rgb pixel might have a bigger size)
void * FBAddr; // address of the linear framebuffer
void * MEMMap; // pointer to the system memory map
void * RAMDisk; // pointer to a ramdisk loaded from the hdd
void* RSDP;
} OSDATA;
typedef struct _Pixel
{
uint8_t B;
uint8_t G;
uint8_t R;
uint8_t Z;
} Pixel;
void early_serial_init()
{
outb(COM1 + 1, 0x00);
outb(COM1 + 3, 0x80);
outb(COM1 + 0, 0x03);
outb(COM1 + 1, 0x00);
outb(COM1 + 3, 0x03);
outb(COM1 + 2, 0xC7);
outb(COM1 + 4, 0x0B);
}
int kmain(void * osdata)
{
early_serial_init();
fldcw(0x37F);
kprintf("\n\n\n");
kprintf("=====================\n");
kprintf(" OrnitorrincOS\n");
kprintf("=====================\n");
kprintf("\n\n\n");
// kprintf("Hello from the kernel\n");
// kprintf("This is a %d complex %x test: %X\n", 1234, 1234, 1234);
uint32_t regs[4] = {0};
char* str = (char*)regs;
uint32_t rax, rbx, rcx, rdx;
cpuid(0, 0, &rax, &rbx, &rcx, &rdx);
regs[0] = rbx;
regs[1] = rdx;
regs[2] = rcx;
kprintf("CPU: %s\n", str);
OSDATA* data = (OSDATA*)osdata;
Pixel* fb = data->FBAddr;
// kprintf("FB Address: %p\n", fb);
{
int i = 0;
int j = 0;
for(i = 0; i < 256; ++i)
{
for(j = 0; j < 256; ++j)
{
Pixel p;
p.R = 0;
p.G = 255;
p.B = 0;
p.Z = 255;
fb[j + 800*i] = p; // original: 1024 but 800 seems to work better(maybe we are not setting the display mode correctly
}
}
}
// kprintf("image finished\n");
kprintf("\n");
kprintf("=> Initializing GDT\n");
cli();
init_gdt();
kprintf("=> GDT initialized\n");
kprintf("\n");
kprintf("=> Initializing IDT\n");
init_idt();
kprintf("=> IDT initialized\n");
sti();
kprintf("=> Interrupts reenabled\n");
char* test_value = (char*)0xFFFFFFFF00000000;
// *test_value = 'B';
XSDP* xsdt = (XSDP*)data->RSDP;
kprintf("\n");
init_acpi(xsdt);
while(1) {};
kprintf("KERNEL FINISHED\n");
hlt();
return 0;
}
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