static struct idt_descriptor idt[256] __attribute__((aligned(0x10)));
static struct idtr idtr __attribute__((aligned(0x10)));
+struct e820_map {
+ uint64_t base;
+ uint64_t length;
+ uint32_t type;
+ uint32_t attrib;
+};
-void kmain(void)
+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("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);