int main(struct multiboot *mboot_ptr)
{
// All our initialisation calls will go in here.
init_descriptor_tables();
monitor_clear();
initialise_paging();
// init_timer(3);
int res = 0;
monitor_clear();
monitor_write(str);
monitor_write("\n\r");
monitor_write_hex(0xbadacacd);
monitor_write_hex(0xbada0000);
monitor_write("\n\r");
monitor_write_dec(0xadacacd);
monitor_write("\n\r");
monitor_write_dec(1234567890);
//memcpy(0xb8000+80*2*5,0xb8000,80*2*5);
//memset(0xb8000,76,80*2*5);
asm volatile ("int $0x3");
//u32int *ptr = (u32int*)0x0ffffff;
//u32int do_page_fault = *ptr;
return 0;
}
void isr_handler(registers_t regs)
{
monitor_write_dec(z);
monitor_put('-');
monitor_write("recieved interrupt: ");
monitor_write_dec(regs.int_no);
monitor_write(", add: ");
monitor_write_hex(regs.cs);
monitor_put(':');
monitor_write_hex(regs.eip);
monitor_put('\n');
++z;
}
//写个struct mulitboot 省着老有警告 用的时候再改
//grub标准里有这个http://gnu.april.org/software/grub/manual/multiboot/multiboot.html
//struct multiboot{};
int kmain(struct multiboot_info* mboot_ptr)//name is mentioned in boot.s
{
init_gdt();
init_idt();
monitor_write("qhello!!@#$%^&*()[]+= bcdef:wworld! 1234");
monitor_write("\n");
monitor_write_hex(256);
monitor_write("finished");
monitor_write_dec(256);
monitor_write("done ss");
monitor_write_hex(kss);
monitor_write("done esp");
monitor_write_hex(kesp);
monitor_put('\n');
//init_gdt();
//init_idt();
asm volatile("int $0x3");
asm volatile("int $0x4");
prtf("aa bb %x %u %s 11\t \nbb\n", 10, 10, "str");
//asm volatile("sti");
//init_timer(500);
//monitor_write_hex((u32int)&end);
prtf("1\tend is at addr :%x end itself:%x kend:%x &kend:%x\n", (u32int)&end, end, kend, &kend);
/*旧的paging实现
init_paging();
prtf("paging enabled!\n");
u32int* ptr = (u32int*)0xa0000000;
*ptr = 1;
*/
//新的paging
//换了个管理物理内存的方法 这个没啥大区别
//分割物理内存管理 虚拟内存管理
//显式映射虚拟地址
//pmm里搞的都是物理地址 函数返回的也是物理地址
init_pmm ((u32int)&end, 1 << 25);//32MB
init_vmm ();
/*prtf("mboot_ptr : %x\n", mboot_ptr);//大概0x2d000 没到640k呢
prtf("mem_upper %x\n", mboot_ptr->mem_upper);*/
map(0xa0000000, 0x300000, PAGE_WRITE|PAGE_PRESENT);
prtf("mapped!\n");
u32int* ptr = (u32int*)0xa0000000;
*ptr = 1;
prtf("assigned!\n");
unmap(0xa0000000);
prtf("unmapped!\n");
*ptr = 2;
prtf("end!\n");
return 0xdeadbeef;
}
// This gets called from our ASM interrupt handler stub.
void irq_handler(registers_t regs)
{
// Send an EOI (end of interrupt) signal to the PICs.
// If this interrupt involved the slave.
if (regs.int_no >= 40)
{
// Send reset signal to slave.
outb(0xA0, 0x20);
}
// Send reset signal to master. (As well as slave, if necessary).
outb(0x20, 0x20);
if (interrupt_handlers[regs.int_no] != 0)
{
isr_t handler = interrupt_handlers[regs.int_no];
handler(regs);
}
else
{
// Unhandled IRQ, log it !
monitor_set_forecolor(e_color_magenta);
monitor_write("IRQ");
monitor_write_hex(regs.int_no);
monitor_write(" raised!\n");
monitor_set_forecolor(e_color_white);
}
}
void isr_handler(registers_t regs)
{
monitor_write("received interrupt: ");
monitor_write_hex(regs.int_no);
monitor_put('\n');
if (interrupt_handlers[regs.int_no] != 0) {
isr_t handler = interrupt_handlers[regs.int_no];
handler(regs);
}
if (regs.int_no == 13) {
monitor_write("gp error : ");
monitor_write_hex(regs.err_code);
monitor_write("\n");
}
}
int main(struct multiboot *mboot_ptr)
{
// All our initialisation calls will go in here.
monitor_clear();
monitor_write("Hello world!\n");
monitor_write_hex(12345678);
monitor_write("\n");
monitor_write_dec(12345678);
monitor_write("\n");
return 0xDEADBABA;
}
// Tests a forking iteration.
void fork_disp() {
// Create a new process in a new address space which is a clone of this.
int ret = fork();
printf("fork() returned ");
monitor_write_hex(ret);
printf(", and getpid() returned ");
monitor_write_hex(getpid());
printf("\n============================================================================\n");
if (ret == 0) {
// You are the child
printf("Now writing to the kernel as the Child.\n");
}
else {
// You are parent
printf("Now writing to the kernel as the Parent.\n");
}
}
void prtf(const char* format, ...)
{
const char** arg = &format;//存format的地址
int c;
//arg是format这个参数的下一个参数的地址,也就是字符串后第一个参数的地址
arg++;
while((c = *format++) != 0){
if(c == '\\'){
c = *format++;
switch(c){
case 'n':
monitor_put('\n');
break;
case 't':
monitor_put('\t');
break;
}
}else if(c == '%'){
c = *format++;
switch(c){
case 'u':
monitor_write_dec(*(u32int*)arg);
break;
case 'x':
monitor_write_hex(*(u32int*)arg);
break;
case 's':
monitor_write(*arg);
break;
case 'p':
monitor_write_hex(*(u32int*)arg);
break;
}
arg++;
}else{
monitor_put(c);
}
}
}
int main(struct multiboot *mboot_ptr)
{
// All our initialisation calls will go in here.
//init descriptor tables
init_descriptor_tables();
//Testing screen instructions
monitor_clear();
monitor_write("Hello World");
u32int n = 0xDEADBABA;
monitor_write("\n");
monitor_write_hex(n);
monitor_write("\n");
n = 1234567890;
monitor_write_dec(n);
asm volatile ("int $0x1");
//asm volatile ("int $0x4");
return 0xDEADBABA;
}
int main(struct multiboot *mboot_ptr, u32int initial_stack)
{
initial_esp = initial_stack;
// Initialise all the ISRs and segmentation
init_descriptor_tables();
// Initialise the screen (by clearing it)
monitor_clear();
// Initialise the PIT to 100Hz
asm volatile("sti");
init_timer(50);
// Find the location of our initial ramdisk.
ASSERT(mboot_ptr->mods_count > 0);
u32int initrd_location = *((u32int*)mboot_ptr->mods_addr);
u32int initrd_end = *(u32int*)(mboot_ptr->mods_addr+4);
// Don't trample our module with placement accesses, please!
placement_address = initrd_end;
// Start paging.
initialise_paging();
// Start multitasking.
initialise_tasking();
// Initialise the initial ramdisk, and set it as the filesystem root.
fs_root = initialise_initrd(initrd_location);
// Create a new process in a new address space which is a clone of this.
int ret = fork();
monitor_write("fork() returned ");
monitor_write_hex(ret);
monitor_write(", and getpid() returned ");
monitor_write_hex(getpid());
monitor_write("\n============================================================================\n");
// The next section of code is not reentrant so make sure we aren't interrupted during.
asm volatile("cli");
// list the contents of /
int i = 0;
struct dirent *node = 0;
while ( (node = readdir_fs(fs_root, i)) != 0)
{
monitor_write("Found file ");
monitor_write(node->name);
fs_node_t *fsnode = finddir_fs(fs_root, node->name);
if ((fsnode->flags&0x7) == FS_DIRECTORY)
{
monitor_write("\n\t(directory)\n");
}
else
{
monitor_write("\n\t contents: \"");
char buf[256];
u32int sz = read_fs(fsnode, 0, 256, buf);
int j;
for (j = 0; j < sz; j++)
monitor_put(buf[j]);
monitor_write("\"\n");
}
i++;
}
monitor_write("\n");
asm volatile("sti");
return 0;
}