/*********************************************************************************
    fichier stdio.h
    Written Alain greiner & Nicolas Pouillon
    Date : 15/09/2009
 *********************************************************************************/

#ifndef _STDIO_H_
#define _STDIO_H_

#define SYSCALL_PROCID          0x00
#define SYSCALL_PROCTIME        0x01
#define SYSCALL_TTY_WRITE       0x02
#define SYSCALL_TTY_READ        0x03
#define SYSCALL_TIMER_WRITE     0x04
#define SYSCALL_TIMER_READ      0x05
#define SYSCALL_GCD_WRITE       0x06
#define SYSCALL_GCD_READ        0x07
#define SYSCALL_ICU_WRITE       0x08
#define SYSCALL_ICU_READ        0x09
#define SYSCALL_TTY_READ_IRQ    0x0A
#define SYSCALL_TTY_WRITE_IRQ   0x0B
#define SYSCALL_LOCKS_WRITE     0x0C
#define SYSCALL_LOCKS_READ      0x0D
#define SYSCALL_EXIT            0x0E
#define SYSCALL_PROCNUMBER      0x0F

#define SYSCALL_FB_SYNC_WRITE   0x10
#define SYSCALL_FB_SYNC_READ    0x11
#define SYSCALL_FB_WRITE        0x12
#define SYSCALL_FB_READ         0x13
#define SYSCALL_FB_COMPLETED    0x14
#define SYSCALL_IOC_WRITE       0x15
#define SYSCALL_IOC_READ        0x16
#define SYSCALL_IOC_COMPLETED   0x17
#define SYSCALL_BARRIER_INIT	0x18
#define SYSCALL_BARRIER_WAIT	0x19

typedef unsigned int size_t;

/****************************************************************
  this is a generic C function to implement all system calls.
  - The first argument is the system call index.
  - The four next arguments are the system call arguments.
  They will be written in registers $2, $4, $5, $6, $7.
 ****************************************************************/
int sys_call(int call_no,
        int arg_o,
        int arg_1,
        int arg_2,
        int arg_3);

/****************************************************************
  These functions access the MIPS protected registers
 ****************************************************************/
int procid();
int proctime();
int procnumber();
int exit();
int rand();

/****************************************************************
  These functions access the MULTI_TTY peripheral
 ****************************************************************/
int tty_puts(char* string);
int tty_putc(char byte);
int tty_putw(int word);
int tty_getc(char* byte);
int tty_getc_irq(char* byte);
int tty_gets_irq(char* buf, int bufsize);
int tty_getw_irq(int* word);
int tty_printf(char* format,...);

/****************************************************************
  These functions access the MULTI_TIMER peripheral
 ****************************************************************/
int timer_set_mode(int timer_index, int mode);
int timer_set_period(int timer_index, int period);
int timer_reset_irq(int timer_index);
int timer_get_time(int timer_index, int* time);

/****************************************************************
  These functions access the GCD peripheral
 ****************************************************************/
int gcd_set_opa(int val);
int gcd_set_opb(int val);
int gcd_start();
int gcd_get_result(int* val);
int gcd_get_status(int* val);

/****************************************************************
  These functions access the ICU peripheral
 ****************************************************************/
int icu_set_mask(int val);
int icu_clear_mask(int val);
int icu_get_mask(int* buffer);
int icu_get_irqs(int* buffer);
int icu_get_index(int* buffer);

/****************************************************************
  These functions access the LOCKS peripheral
 ****************************************************************/
int lock_acquire(int lock_index);
int lock_release(int lock_index);

/****************************************************************
  These functions access the BLOCK_DEVICE peripheral
 ****************************************************************/
int ioc_read(size_t lba, void* buffer, size_t count);
int ioc_write(size_t lba, void* buffer, size_t count);
int ioc_completed();

/****************************************************************
  These functions access the FRAME_BUFFER peripheral
 ****************************************************************/
int fb_read(size_t offset, void* buffer, size_t length);
int fb_write(size_t offset, void* buffer, size_t length);
int fb_completed();
int fb_sync_read(size_t offset, void* buffer, size_t length);
int fb_sync_write(size_t offset, void* buffer, size_t length);

/****************************************************************
  These functions access the synchronization barriers
 ****************************************************************/
int barrier_init(size_t index, size_t count);
int barrier_wait(size_t index);

#endif

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