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#include "kernel.h"
#include "smp.h"
#include <stdint.h>
#include "gdt.h"
#include "mem.h"
#include "vmem.h"
#include "interrupts.h"
#include "kmalloc.h"
#include "spinlock.h"
#include "asm_x86.h"
#include "asm_pit.h"
#include "asm_smp.h"
#include "apic.h"
#include "vesa.h"
void smp_main()
{
// setup stack and jump to kernel_ap();
uint32_t ebp=kballoc(1);
asm volatile("mov %0, %%ebp"::"r"(ebp));
asm volatile("mov %ebp, %esp");
asm volatile("jmp kernel_ap");
}
void kernel_ap()
{
klog("Install Interrupt Vector Table (IVT) on CPU with lapic_id=0x%x ...",apic_id());
interrupts_install();
klog("Install Global Descriptor Table (GDT) on CPU with lapic_id=0x%x ...",apic_id());
gdt_init();
klog("Setup Paging on CPU with lapic_id=0x%x ...",apic_id());
struct pdirectory_struct *dir=vmem_kernel_dir();
x86_set_page_directory(dir);
x86_paging_enable();
apic_enable();
//1024 pages from here on are mapped per cpu for testing! TODO: dynamic.
uint32_t *cpu_mem=VMEM_CPU_PRIVATE;
cpu_mem[0]=apic_id();
klog("Setup the LAPIC Timer on CPU with lapic_id=0x%x ...",apic_id());
apic_init_timer(1);// freq 1HZ
klog("Enable Interrupts on CPU with lapic_id=0x%x ...",apic_id());
x86_sti();
asm_smp_unlock();
cpu_mem[1]=0;
while(1){
PutString("cpu cnt: %d",10,10+apic_id()*20,0xff0000,cpu_mem[1]++);
asm("hlt");
}
}
// this will start all our application processors!
void smp_start_aps(acpi_information *pros)
{
for(int i=0;i<pros->processors;i++)
{
if(pros->boot==i)continue; // skib bsp
uint8_t dest=pros->local_apic_id[i];
klog("starting cpu %d (destination apic id: 0x%x) ",i,dest);
apic_sipi(dest,0x7); // start on 0x7000
}
}
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