#include <tty.h>
+#include <io.h>
+#include <irq/idt.h>
+#include <irq/i8259a.h>
+#include <stdint.h>
+#include <mm/paging.h>
-const char *string = "Hello there!\n\n\
-Hopefully your machine manages to print this text.\n\
-If it did, that's great news because I managed to write a partial VGA driver.\n\n\
-Right now, the short-term roadmap is as follows:\n\n\
-* Enable interrupts using the PIC.\n\
-* Write a driver for the Intel 8042 PS/2 controller so the OS can receive keystrokes.\n\
-* A working i8042 driver will also aid in enabling A20 Gate, which should be done ASAP so the OS can address odd (as in odd/even number) megabytes.\n\n\
-Feel free to mess around with the code, although I doubt it will be very interesting at the moment.\n";
+struct abort_frame;
+struct interrupt_frame;
+struct fault_frame;
+extern void double_fault(struct abort_frame *frame);
+extern void keyb_handler(struct interrupt_frame *frame);
+extern void pf_handler(struct fault_frame *frame);
+static struct idt_descriptor idt[256] __attribute__((aligned(0x10)));
+static struct idtr idtr __attribute__((aligned(0x10)));
-void _start(void)
+struct e820_map {
+ uint64_t base;
+ uint64_t length;
+ uint32_t type;
+ uint32_t attrib;
+};
+
+void print_e820(struct e820_map *mmap, int mmap_size)
+{
+ kprint(" Base | Length | Type | Attrib |\n", 0);
+ kprint("------------------------------------------------------------\n", 0);
+ for (int i=0; i<mmap_size; i++) {
+ kprintq(mmap[i].base);
+ kprintc('|', 0);
+ kprintq(mmap[i].length);
+ kprintc('|', 0);
+ kprintd(mmap[i].type);
+ kprintc('|', 0);
+ kprintd(mmap[i].attrib);
+ kprintc('|', 0);
+ kprintc('\n', 0);
+ }
+}
+
+void kmain(struct e820_map *mmap, int mmap_size)
{
screen_clear();
- kprint(string);
+ kprint("Welcome to Nameless OS!\nRunning revision: ", 0);
+ kprint(GIT_COMMIT, 0);
+ kprint("\n", 0);
+ kprint("BIOS memory map:\n", 0);
+ print_e820(mmap, mmap_size);
+ kprint("Preparing IDT...\n", 0);
+ idt_set_descriptor(idt, 8, 0x8, (uint32_t) double_fault, IDT_INTERRUPT_GATE, 0x0);
+ idt_set_descriptor(idt, 14, 0x8, (uint32_t) pf_handler, IDT_INTERRUPT_GATE, 0x0);
+ idt_set_descriptor(idt, 33, 0x8, (uint32_t) keyb_handler, IDT_INTERRUPT_GATE, 0x0);
+ kprint("IDT prepared, loading...\n", 0);
+ populate_idtr(&idtr, idt);
+ load_idt(idtr);
+ kprint("IDT loaded, enabling interrupts...\n", 0);
+ pic_init(0x20, 0x28);
+ pic_mask_all();
+ pic_unmask(1);
+ asm volatile ("sti");
+ kprint("All done\n", 0);
+ kprintdec(12345);
+ kprintc('\n');
+ kprintdec(6789);
+ kprintc('\n');
+ while(1);
}