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Debug GDT enable multitasking

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This commit is contained in:
Loic Guegan 2021-05-02 14:46:18 +02:00
parent 4f08ba2b1d
commit e59104ffb5
14 changed files with 283 additions and 85 deletions
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44
src/boucane.cc
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@ -28,15 +28,18 @@ extern u64 gdt64_tss;
void configure_tss(){
// Get TSS physical address
u64 tss_addr=(u64)PHY(&kvar_tss);
u64 tss_addr=(u64)&kvar_tss;
u32 limit=sizeof(TSS);
u32 desc1=(tss_addr&0xFFFF)<<16|(limit&0xFFFF);
tss_addr>>=16;
u32 desc2=(tss_addr&0xFF);
desc2|=0b1001<<8; // Type
desc2|=0b111<<13; // Permission & present
u32 desc3=((limit>>8)&0xFFFF)|(limit>>24);
desc2|=0b11101001<<8; // Type, Permission, present
tss_addr>>=8;
desc2|=tss_addr<<24;
tss_addr>>=8;
u32 desc3=tss_addr;
// Configure GDT
u32 *gdt_entry=(u32*)&gdt64_tss;
gdt_entry[0]=desc1;
@ -46,6 +49,7 @@ void configure_tss(){
// Configure segment
kvar_tss.rsp0=(u64)VIRT(kvar_stack_pma);
kvar_tss.iomap_address=0;
asm(
"mov $0x28, %ax \n\t"
"ltr %ax"
@ -53,9 +57,15 @@ void configure_tss(){
}
void task1(){
u64 a=0xEEEEEE;
DUMP(a);
while(1);
while(1){
asm("mov $1, %rdi;int $0x30");
}
}
void task2(){
while(1){
asm("mov $2, %rdi;int $0x30");
}
}
extern "C" void boucane(u64 mb_info){
@ -77,7 +87,7 @@ extern "C" void boucane(u64 mb_info){
memtext_init();
idt_enable_interrupt();
apic_enable();
// Looking for framebuffer
FRAMEBUFFER fb_info;
if(mb2_find_framebuffer((u32*)mb_info, &fb_info)){
@ -97,23 +107,25 @@ extern "C" void boucane(u64 mb_info){
__putchar=vgatext_putchar;
}
}
// Booting!
printk("Booting Boucane v%d.%d.%d\n",VERSION_MAJOR,VERSION_MINOR, VERSION_PATH);
printk("System informations -- ");
char bootloader[20];
if(mb2_find_bootloader_name((u32*)mb_info,bootloader)){
printk("System informations -- BOOT:%s ", bootloader);
printk("BOOT:%s ", bootloader);
}
MEM_INFO mem_infos;
if(mb2_find_mem((u32*)mb_info,&mem_infos)){
u64 mem=mem_infos.mem_upper-mem_infos.mem_lower;
mem/=1024;
printk("RAM:%dMB\n", mem);
}
//create_task((void*)task1, 50);
//scheduler_start();
show_ticks=1;
create_task((void*)task1, 50);
create_task((void*)task2, 50);
scheduler_start();
while(1);
}