system.h

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/* system.h */

#ifndef __ROUTIX_TYPES
#include "sys/types.h"
#endif

#ifndef __SYSTEM
#define __SYSTEM

#define rdtscl(low) \
     __asm__ __volatile__ ("rdtsc" : "=A" (low))


/* Constantes de memoria física y virtual */
#define KERNEL_FCODE    0
#define KERNEL_FDATA    0x100000
#define KERNEL_FSTACK_TOP 0x200000      
#define KERNEL_STACK_SIZE 0x20000
#define KERNEL_FSTACK   KERNEL_FSTACK_TOP - KERNEL_STACK_SIZE

#define KERNEL_END      KERNEL_FSTACK_TOP

#define KERNEL_CODE             0xc0000000
#define KERNEL_DATA             0xc8000000
#define KERNEL_STACK            0xd0000000
#define KERNEL_STACK_TOP        KERNEL_STACK + 0x8000000
#define KERNEL_INTERRUPT        KERNEL_STACK_TOP


#define DESC_CODE               1<<3
#define DESC_DATA               2<<3
#define DESC_CODE_USUARIO       3<<3 | 3
#define DESC_DATA_USUARIO       4<<3 | 3
#define DESC_TSS0               5<<3
#define DESC_TSS1               6<<3

/* Variables Globales */
extern dword memoria;

extern addr_t KERNEL_PDT;
extern addr_t USER_PDT;

//Kernel PANIC (suceso inesperado o irrecuperable)
void kpanic(char *str);

#define nop() __asm__ __volatile__ ("nop")

#define cli() __asm__ __volatile__ ("pushf ; cli")
#define sti() __asm__ __volatile__ ("popf")

#define _cli()  __asm__ __volatile__ ("cli")
#define _sti()  __asm__ __volatile__ ("sti")

int getvar (char *);
int setvar (char *, int);
// Funciones de libreria
int sys_putc (char);
void kprintf ( char *string, ... );


#endif

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