#define FOOLOS_MODULE_NAME "smp"

#include "lib/logger/log.h"
#include "lib/int/stdint.h"
#include "smp.h"
#include "mem.h"
#include "spinlock.h"
#include "x86.h"

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

// some multiprocessor shit that should move away TODO
uint32_t c1,c2,c3;
volatile uint8_t proc;
uint32_t cpu_counter[SMP_MAX_PROC];

void smp_main()
{
    ///	TODO
    /////// SYMMETRIC MULTIPROCESSING, APS get caought here, move it away ///
    // catch the APs (Application Processors)
//    if(mp==1)
    {
	uint32_t ebp=pmmngr_alloc_block()+4095;

	asm volatile("mov %0, %%ebp"::"r"(ebp));
        asm volatile("mov %ebp, %esp");
        asm volatile("jmp kernel_ap");
    }

    proc=c1=c2=c3=0;
    for(int i=0;i<SMP_MAX_PROC;i++)cpu_counter[i]=0;
}


void kernel_ap()
{
	proc++;
	uint8_t p=proc;
	while(1)
	{
	    cpu_counter[p]++;

 	    lock_spin(0);
	    if(cpu_counter[p]%1000000==0)log(FOOLOS_MODULE_NAME,FOOLOS_LOG_DEBUG,"cpu[%d] %d",p,cpu_counter[p]);
	    lock_release(0);
	}
}
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, apic_id: 0x%X, bps: %s, 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
	}
}