lowlevel.h

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#ifndef __LOW_LEVEL_H__
#define __LOW_LEVEL_H__
 
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
    uint8_t inportb(uint16_t port);
    uint16_t inportw(uint16_t port);
    uint16_t inportd(uint16_t port);
    void outportb(uint16_t port, uint8_t val);
    void outportw(uint16_t port, uint16_t val);
    void outportd(uint16_t port, uint32_t val);
 
    void cpuid(size_t page, size_t* a, size_t* b, size_t* c, size_t* d, size_t subpage = 0);
    void cacheflush();
    void tlbflush(void* addr);
    void memory_barrier();
    void* get_paging_root();
    void set_paging_root(uint64_t);
    void cpu_startup();
    uint64_t rdmsr(size_t reg);
    void wrmsr(size_t reg, uint64_t val);
    size_t read_cr0();
    void write_cr0(size_t);
    void call_kernel(void* param, void* entry, void* stack, size_t stacksz);
 
#ifdef __cplusplus
}
#endif
 
#endif