#include <stdint.h>
#include <mm/paging.h>
+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)));
-static struct page_directory_entry page_dir[1024] __attribute__((aligned(0x1000)));
-static struct page_table_entry page_table[1024] __attribute__((aligned(0x1000)));
+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("\nEnabling paging...\n", 0);
- for (int i=0xb8; i < 0xc0; i++) {
- page_table[i].p = 1;
- page_table[i].rw = 0;
- page_table[i].us = 0;
- page_table[i].page_frame_addr = i;
- }
- for (int i=0x100; i < 0x102; i++) {
- page_table[i].p = 1;
- page_table[i].rw = 0;
- page_table[i].us = 0;
- page_table[i].page_frame_addr = i;
- }
- for (int i=0x102; i < 0x110; i++) {
- page_table[i].p = 1;
- page_table[i].rw = 1;
- page_table[i].us = 0;
- page_table[i].page_frame_addr = i;
- }
- page_dir[0].p = 1;
- page_dir[0].page_table_addr = (int) &page_table >> 12;
- enable_paging(page_dir);
+ 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);
pic_unmask(1);
asm volatile ("sti");
kprint("All done\n", 0);
- struct idtr curr_idtr;
- asm ("sidt %0": "=m" (curr_idtr));
- kprintw(curr_idtr.limit);
- kprintd(curr_idtr.base);
- //kprint("Gonna force a double fault\n", 0);
- //int test = 1/0;
- //int test2 = *(int *) (0xa0000000);
+ kprintdec(12345);
+ kprintc('\n');
+ kprintdec(6789);
+ kprintc('\n');
while(1);
}