#define FOOLOS_MODULE_NAME "smp"

#include "lib/logger/log.h"
#include "lib/int/stdint.h"
#include "smp.h"

#define FOOLOS_APIC_SPUR_INT 0x00f0
#define FOOLOS_APIC_INT_COMMAND_LOW 0x0300
#define FOOLOS_APIC_INT_COMMAND_HIGH 0x0310

void smp_log_procdata(smp_processors *procdata)
{
    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"---- smp -----");
    for(int i=0;i<procdata->processors;i++)
    {
	log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"cpu %d : local_apic_id: 0x%X bps: %s local_apic_addr:0x%08X",i,procdata->local_apic_id[i],i==procdata->boot?"yes":"no",procdata->local_apic_address);
    }

}

// this will start all our application processors!
void smp_start_aps(smp_processors *pros,uint8_t *start_sel)
{

    //lets copy the code to the bootsector !
	
	uint8_t *dest=0x7000;
	for(int i=0;i<0x100;i++)
	{
	    dest[i]=start_sel[i];

	}
    
	//bsp (boot processor) enables its local apic
	uint32_t *reg=pros->local_apic_address+FOOLOS_APIC_SPUR_INT;
	*reg=0xffffffff; // all bits 1 and interrupt 255

        for(int i=0;i<pros->processors;i++)
	{
	    if(pros->boot==i)continue;

	    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"starting cpu %d",i);

	    uint8_t dest=pros->local_apic_id[i];

	    reg=pros->local_apic_address+FOOLOS_APIC_INT_COMMAND_HIGH;
	    *reg=dest<<24; // destination apic.

	    reg=pros->local_apic_address+FOOLOS_APIC_INT_COMMAND_LOW;
	    *reg=(5<<8)|(1<<14); // 101 INIT

	    // do we really neet this?
	    // todo: use some real sleep (not implemented yet :( )
	    sleep(30);

	    // start proc 0x7 = 0x7000; etc..
	    *reg=(6<<8)|(1<<14)|0x7; // 110 SIPI
	}
}