#include #include #include #include .text .globl _secondary_start .balign 4096 _secondary_start: .code16 cli xorl %eax, %eax movl %eax, %cr3 /* Invalidate TLB*/ /* On hyper threaded cpus, invalidating the cache here is * very very bad. Don't. */ /* setup the data segment */ movw %cs, %ax movw %ax, %ds data32 lgdt gdtaddr - _secondary_start movl %cr0, %eax andl $0x7FFAFFD1, %eax /* PG,AM,WP,NE,TS,EM,MP = 0 */ orl $0x60000001, %eax /* CD, NW, PE = 1 */ movl %eax, %cr0 ljmpl $0x10, $1f 1: .code32 movw $0x18, %ax movw %ax, %ds movw %ax, %es movw %ax, %ss movw %ax, %fs movw %ax, %gs /* Load the Interrupt descriptor table */ lidt idtarg /* Set the stack pointer, and flag that we are done */ xorl %eax, %eax movl secondary_stack, %esp movl %eax, secondary_stack call secondary_cpu_init 1: hlt jmp 1b gdtaddr: .word gdt_limit /* the table limit */ .long gdt /* we know the offset */ .code32