lowlevel.h

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#ifndef __LOW_LEVEL_H__
#define __LOW_LEVEL_H__
 
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
    /*
     * _getCurrentEL -- returns the current exception level
     */
    uint64_t _getCurrentEL();
 
    /*
     * read_ttbr0_el1 -- reads the current exception's 
     * page mapping base address
     */
    uint64_t read_ttbr0_el1();
 
    /*
     * write_ttbr0_el1 -- writes current page mapping base
     * address
     */
    void write_ttbr0_el1(uint64_t* base);
 
    uint64_t read_ttbr1_el1();
 
    void write_ttbr1_el1(uint64_t* base);
 
    uint64_t read_ttbr1_el2();
 
    uint64_t read_ttbr0_el2();
 
    uint64_t read_tcr_el1();
 
    uint64_t read_tcr_el2();
 
    void write_tcr_el1(uint64_t tcr);
 
    uint64_t read_mair_el1();
 
    void write_mair_el1(uint64_t mair);
 
    /*
     * read_sctlr_el1 -- reads current system control
     * register of el1
     */
    uint64_t read_sctlr_el1();
 
    /*
     * write_sctlr_el1 -- write current system control
     * register of el1
     * @param sctlr -- system control register value
     */
    void write_sctlr_el1(uint64_t sctlr);
 
    uint64_t read_spsr_el2();
 
    void write_spsr_el2(uint64_t spsr);
 
    /*
     * dsb_ish -- data syncronization barrier inner shareablity memory
     * flush, which makes the previous memory access visible for
     * multi core system
     */
    void dsb_ish();
 
    /*
     * isb_flush -- instruction synchronization flush, flush previous
     * instruction set
     */
    void isb_flush();
 
    void tlb_flush(uint64_t virtul_addr);
 
    uint64_t read_esr_el1();
 
    uint64_t read_far_el1();
 
    uint64_t read_elr_el1();
 
    void write_vbar_el1(uint64_t vecbase);
 
    void dc_cvau(uint64_t a);
 
    void ic_ivau(uint64_t a);
 
    void callKernel(void* param, uint64_t stack, uint64_t stacksize, void* entry);
 
#ifdef __cplusplus
}
#endif
 
#endif