323 lines
8.2 KiB
C
323 lines
8.2 KiB
C
|
|
static mboot_mod_t modules_mboot[sizeof(modules)/sizeof(*modules)] = {
|
|
{0,0,0,1}
|
|
};
|
|
|
|
static struct multiboot multiboot_header = {
|
|
/* flags; */ MULTIBOOT_FLAG_CMDLINE | MULTIBOOT_FLAG_MODS | MULTIBOOT_FLAG_MEM | MULTIBOOT_FLAG_MMAP,
|
|
/* mem_lower; */ 0x100000,
|
|
/* mem_upper; */ 0x640000,
|
|
/* boot_device; */ 0,
|
|
/* cmdline; */ 0,
|
|
/* mods_count; */ sizeof(modules)/sizeof(*modules),
|
|
/* mods_addr; */ (uintptr_t)&modules_mboot,
|
|
/* num; */ 0,
|
|
/* size; */ 0,
|
|
/* addr; */ 0,
|
|
/* shndx; */ 0,
|
|
/* mmap_length; */ 0,
|
|
/* mmap_addr; */ 0,
|
|
/* drives_length; */ 0,
|
|
/* drives_addr; */ 0,
|
|
/* config_table; */ 0,
|
|
/* boot_loader_name; */ 0,
|
|
/* apm_table; */ 0,
|
|
/* vbe_control_info; */ 0,
|
|
/* vbe_mode_info; */ 0,
|
|
/* vbe_mode; */ 0,
|
|
/* vbe_interface_seg; */ 0,
|
|
/* vbe_interface_off; */ 0,
|
|
/* vbe_interface_len; */ 0,
|
|
};
|
|
|
|
static long ramdisk_off = 1;
|
|
static long ramdisk_len = 1;
|
|
|
|
extern void jump_to_main(void);
|
|
|
|
int _eax = 1;
|
|
int _ebx = 1;
|
|
int _xmain = 1;
|
|
|
|
struct mmap_entry {
|
|
uint64_t base;
|
|
uint64_t len;
|
|
uint32_t type;
|
|
uint32_t reserved;
|
|
};
|
|
|
|
extern unsigned short mmap_ent;
|
|
extern unsigned short lower_mem;
|
|
|
|
static void move_kernel(void) {
|
|
clear();
|
|
print("Relocating kernel...\n");
|
|
|
|
Elf32_Header * header = (Elf32_Header *)KERNEL_LOAD_START;
|
|
|
|
if (header->e_ident[0] != ELFMAG0 ||
|
|
header->e_ident[1] != ELFMAG1 ||
|
|
header->e_ident[2] != ELFMAG2 ||
|
|
header->e_ident[3] != ELFMAG3) {
|
|
print("Kernel is invalid?\n");
|
|
}
|
|
|
|
uintptr_t entry = (uintptr_t)header->e_entry;
|
|
|
|
for (uintptr_t x = 0; x < (uint32_t)header->e_phentsize * header->e_phnum; x += header->e_phentsize) {
|
|
Elf32_Phdr * phdr = (Elf32_Phdr *)((uint8_t*)KERNEL_LOAD_START + header->e_phoff + x);
|
|
if (phdr->p_type == PT_LOAD) {
|
|
//read_fs(file, phdr->p_offset, phdr->p_filesz, (uint8_t *)phdr->p_vaddr);
|
|
print("Loading a Phdr... ");
|
|
print_hex(phdr->p_vaddr);
|
|
print(" ");
|
|
print_hex(phdr->p_offset);
|
|
print(" ");
|
|
print_hex(phdr->p_filesz);
|
|
print("\n");
|
|
memcpy((uint8_t*)phdr->p_vaddr, (uint8_t*)KERNEL_LOAD_START + phdr->p_offset, phdr->p_filesz);
|
|
long r = phdr->p_filesz;
|
|
while (r < phdr->p_memsz) {
|
|
*(char *)(phdr->p_vaddr + r) = 0;
|
|
r++;
|
|
}
|
|
}
|
|
}
|
|
|
|
print("Setting up memory map...\n");
|
|
print_hex(mmap_ent);
|
|
print("\n");
|
|
memset((void*)KERNEL_LOAD_START, 0x00, 1024);
|
|
mboot_memmap_t * mmap = (void*)KERNEL_LOAD_START;
|
|
multiboot_header.mmap_addr = (uintptr_t)mmap;
|
|
|
|
struct mmap_entry * e820 = (void*)0x5000;
|
|
|
|
uint64_t upper_mem = 0;
|
|
for (int i = 0; i < mmap_ent; ++i) {
|
|
print("entry "); print_hex(i); print("\n");
|
|
print("base: "); print_hex((uint32_t)e820[i].base); print("\n");
|
|
print("type: "); print_hex(e820[i].type); print("\n");
|
|
|
|
mmap->size = sizeof(uint64_t) * 2 + sizeof(uintptr_t);
|
|
mmap->base_addr = e820[i].base;
|
|
mmap->length = e820[i].len;
|
|
mmap->type = e820[i].type;
|
|
if (mmap->type == 1 && mmap->base_addr >= 0x100000) {
|
|
upper_mem += mmap->length;
|
|
}
|
|
mmap = (mboot_memmap_t *) ((uintptr_t)mmap + mmap->size + sizeof(uintptr_t));
|
|
}
|
|
|
|
print("lower "); print_hex(lower_mem); print("KB\n");
|
|
multiboot_header.mem_lower = 1024;
|
|
print("upper ");
|
|
print_hex(upper_mem >> 32);
|
|
print_hex(upper_mem);
|
|
print("\n");
|
|
|
|
multiboot_header.mem_upper = upper_mem / 1024;
|
|
|
|
int foo;
|
|
//__asm__ __volatile__("jmp %1" : "=a"(foo) : "a" (MULTIBOOT_EAX_MAGIC), "b"((unsigned int)multiboot_header), "r"((unsigned int)entry));
|
|
_eax = MULTIBOOT_EAX_MAGIC;
|
|
_ebx = (unsigned int)&multiboot_header;
|
|
_xmain = entry;
|
|
jump_to_main();
|
|
}
|
|
|
|
static void do_it(struct ata_device * _device) {
|
|
device = _device;
|
|
if (device->atapi_sector_size != 2048) {
|
|
print_hex(device->atapi_sector_size);
|
|
print("\n - bad sector size\n");
|
|
return;
|
|
}
|
|
for (int i = 0x10; i < 0x15; ++i) {
|
|
ata_device_read_sector_atapi(device, i, (uint8_t *)root);
|
|
switch (root->type) {
|
|
case 1:
|
|
root_sector = i;
|
|
goto done;
|
|
case 0xFF:
|
|
return;
|
|
}
|
|
}
|
|
return;
|
|
done:
|
|
restore_root();
|
|
|
|
if (navigate(KERNEL_PATH)) {
|
|
print("Found kernel.\n");
|
|
print_hex(dir_entry->extent_start_LSB); print(" ");
|
|
print_hex(dir_entry->extent_length_LSB); print("\n");
|
|
long offset = 0;
|
|
for (int i = dir_entry->extent_start_LSB; i < dir_entry->extent_start_LSB + dir_entry->extent_length_LSB / 2048 + 1; ++i, offset += 2048) {
|
|
ata_device_read_sector_atapi(device, i, (uint8_t *)KERNEL_LOAD_START + offset);
|
|
}
|
|
restore_root();
|
|
if (navigate(MODULE_DIRECTORY)) {
|
|
memcpy(mod_dir, dir_entry, sizeof(iso_9660_directory_entry_t));
|
|
print("Scanning modules...\n");
|
|
char ** c = modules;
|
|
int j = 0;
|
|
while (*c) {
|
|
print("load "); print(*c); print("\n");
|
|
if (!navigate(*c)) {
|
|
print("Failed to locate module! [");
|
|
print(*c);
|
|
multiboot_header.mods_count--;
|
|
print("]\n");
|
|
} else {
|
|
modules_mboot[j].mod_start = KERNEL_LOAD_START + offset;
|
|
modules_mboot[j].mod_end = KERNEL_LOAD_START + offset + dir_entry->extent_length_LSB;
|
|
for (int i = dir_entry->extent_start_LSB; i < dir_entry->extent_start_LSB + dir_entry->extent_length_LSB / 2048 + 1; ++i, offset += 2048) {
|
|
ata_device_read_sector_atapi(device, i, (uint8_t *)KERNEL_LOAD_START + offset);
|
|
}
|
|
j++;
|
|
}
|
|
c++;
|
|
restore_mod();
|
|
}
|
|
print("Done.\n");
|
|
restore_root();
|
|
if (navigate(RAMDISK_PATH)) {
|
|
clear_();
|
|
ramdisk_off = KERNEL_LOAD_START + offset;
|
|
ramdisk_len = dir_entry->extent_length_LSB;
|
|
modules_mboot[multiboot_header.mods_count-1].mod_start = ramdisk_off;
|
|
modules_mboot[multiboot_header.mods_count-1].mod_end = ramdisk_off + ramdisk_len;
|
|
|
|
print_("\n\n\n\n\n\n\n");
|
|
print_banner("Loading ramdisk...");
|
|
print_("\n\n\n");
|
|
attr = 0x70;
|
|
|
|
for (int i = dir_entry->extent_start_LSB; i < dir_entry->extent_start_LSB + dir_entry->extent_length_LSB / 2048 + 1; ++i, offset += 2048) {
|
|
if (i % ((dir_entry->extent_length_LSB / 2048) / 80) == 0) {
|
|
print_(" ");
|
|
}
|
|
ata_device_read_sector_atapi(device, i, (uint8_t *)KERNEL_LOAD_START + offset);
|
|
}
|
|
attr = 0x07;
|
|
print("Done.\n");
|
|
move_kernel();
|
|
}
|
|
} else {
|
|
print("No mod directory?\n");
|
|
}
|
|
} else {
|
|
print("boo\n");
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static int boot_mode = 0;
|
|
|
|
void show_menu(void) {
|
|
/* Determine number of options */
|
|
sel_max = 0;
|
|
while (boot_options[sel_max].value) {
|
|
sel_max++;
|
|
}
|
|
sel_max += BASE_SEL + 1;
|
|
|
|
outportb(0x3D4, 14);
|
|
outportb(0x3D5, 0xFF);
|
|
outportb(0x3D4, 15);
|
|
outportb(0x3D5, 0xFF);
|
|
|
|
inportb(0x3DA);
|
|
outportb(0x3C0, 0x30);
|
|
char b = inportb(0x3C1);
|
|
b &= ~8;
|
|
outportb(0x3c0, b);
|
|
|
|
clear_();
|
|
|
|
do {
|
|
x = 0;
|
|
y = 0;
|
|
attr = 0x1f;
|
|
print_banner(VERSION_TEXT);
|
|
attr = 0x07;
|
|
print_("\n");
|
|
|
|
for (int i = 0; i < BASE_SEL+1; ++i) {
|
|
attr = sel == i ? 0x70 : 0x07;
|
|
print_(" ");
|
|
print_(boot_mode_names[i]);
|
|
print_("\n");
|
|
}
|
|
|
|
// put a gap
|
|
attr = 0x07;
|
|
print_("\n");
|
|
|
|
for (int i = 0; i < sel_max - BASE_SEL - 1; ++i) {
|
|
toggle(BASE_SEL + 1 + i, *boot_options[i].value, boot_options[i].title);
|
|
}
|
|
|
|
attr = 0x07;
|
|
y = 16;
|
|
print_("\n\n");
|
|
print_banner(HELP_TEXT);
|
|
print_("\n");
|
|
|
|
if (sel > BASE_SEL) {
|
|
print_banner(boot_options[sel-BASE_SEL-1].description_1);
|
|
print_banner(boot_options[sel-BASE_SEL-1].description_2);
|
|
print_("\n");
|
|
} else {
|
|
print_banner(COPYRIGHT_TEXT);
|
|
print_("\n");
|
|
print_banner(LINK_TEXT);
|
|
}
|
|
|
|
int s = read_scancode();
|
|
if (s == 0x50) {
|
|
sel = (sel + 1) % sel_max;
|
|
continue;
|
|
} else if (s == 0x48) {
|
|
sel = (sel_max + sel - 1) % sel_max;
|
|
continue;
|
|
} else if (s == 0x1c) {
|
|
if (sel <= BASE_SEL) {
|
|
boot_mode = sel;
|
|
break;
|
|
} else {
|
|
int index = sel - BASE_SEL - 1;
|
|
*boot_options[index].value = !*boot_options[index].value;
|
|
}
|
|
}
|
|
} while (1);
|
|
}
|
|
|
|
static void boot(void) {
|
|
|
|
clear_();
|
|
|
|
multiboot_header.cmdline = (uintptr_t)cmdline;
|
|
|
|
ata_device_detect(&ata_primary_master);
|
|
ata_device_detect(&ata_primary_slave);
|
|
ata_device_detect(&ata_secondary_master);
|
|
ata_device_detect(&ata_secondary_slave);
|
|
|
|
if (ata_primary_master.is_atapi) {
|
|
do_it(&ata_primary_master);
|
|
}
|
|
if (ata_primary_slave.is_atapi) {
|
|
do_it(&ata_primary_slave);
|
|
}
|
|
if (ata_secondary_master.is_atapi) {
|
|
do_it(&ata_secondary_master);
|
|
}
|
|
if (ata_secondary_slave.is_atapi) {
|
|
do_it(&ata_secondary_slave);
|
|
}
|
|
|
|
while (1);
|
|
}
|