1 files changed, 131 insertions, 0 deletions
diff --git a/kernel/kernel.c b/kernel/kernel.c
new file mode 100644
index 0000000..335cfe4
--- /dev/null
+++ b/kernel/kernel.c
@@ -0,0 +1,131 @@
+
+#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;
+}