#ifndef CPU_H
#define CPU_H

#include "hos_types.h"

static u32_t read_cr0() __attribute__ ((unused));
static u32_t read_cr0()
{
    u32_t val;
    __asm__ __volatile__ ("movl %%cr0, %0" : "=r" (val));
    return val;
}

static u32_t read_cr2() __attribute__ ((unused));
static u32_t read_cr2()
{
    u32_t val;
    __asm__ __volatile__ ("movl %%cr2, %0" : "=r" (val));
    return val;
}

static u32_t read_cr3() __attribute__ ((unused));
static u32_t read_cr3()
{
    u32_t val;
    __asm__ __volatile__ ("movl %%cr3, %0" : "=r" (val));
    return val;
}

#define write_cr0(val) \
    __asm__ __volatile__ ("movl %0, %%cr0" : : "r" (val));

#define write_cr3(val) \
    __asm__ __volatile__ ("movl %0, %%cr3" : : "r" (val));

#define write_esp(val) \
    __asm__ __volatile__ ("movl %0, %%esp" : : "r" (val));

#endif