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#include "kernel.h"
#include "log.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"
#include "syscalls.h"
void run_smp();
// set cpu private value
void smp_set(uint32_t offset, uint32_t value)
{
uint32_t *cpu_mem=VMEM_CPU_PRIVATE;
cpu_mem[offset]=value;
}
// get cpu private value
uint32_t smp_get(uint32_t offset)
{
uint32_t *cpu_mem=VMEM_CPU_PRIVATE;
return cpu_mem[offset];
}
void smp_main_generic(bool bsp)
{
if(!bsp) // for the bsp this was already done beforehand
{
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();
}
// setup stack and jump to kernel_ap();
uint32_t ebp=VMEM_CPU_STACK_TOP;
asm volatile("mov %0, %%ebp"::"r"(ebp));
asm volatile("mov %ebp, %esp");
asm volatile("jmp run_smp");
}
void smp_main()
{
smp_main_generic(false);
}
void run_smp()
{
apic_enable();
klog("Setup the LAPIC Timer on CPU with lapic_id=0x%x ...",apic_id());
apic_init_timer(5);// freq x HZ
klog("Enable Interrupts on CPU with lapic_id=0x%x ...",apic_id());
asm_smp_unlock();
smp_set(SMP_APIC_ID,apic_id());
smp_set(1000,'a'+apic_id());
smp_set(SMP_SCHEDULER_INIT,1);
x86_sti();
while(1)asm("hlt"); // wait for scheduler to kick in
}
// 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
}
*/
smp_main_generic(true);
}
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