/*---------------------------------------------------------------------------*
  Project:  CtrBrom - OS - include
  File:     system.h

  Copyright 2008 Nintendo.  All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law.  They may
  not be disclosed to third parties or copied or duplicated in any form,
  in whole or in part, without the prior written consent of Nintendo.

  $Date::            $
  $Rev$
  $Author$
 *---------------------------------------------------------------------------*/
#ifndef BROM_OS_SYSTEM_H_
#define BROM_OS_SYSTEM_H_

#ifndef SDK_ASM
#include  <brom/types.h>
#endif

#include  <ctr/arm_reg.h>
#include  <brom/os/common/tick.h>


#ifdef __cplusplus
extern "C" {
#endif

//----------------------------------------------------------------------------

typedef u32 OSCpuCycle;

#define OS_CPU_CLOCK                   HW_CPU_CLOCK

//---- sec to cpu cycle
// 150nsec - 30sec
#define  OS_SEC_TO_CPUCYC(  sec  ) ((OSCpuCycle)( ( OS_CPU_CLOCK * (u32)(sec)) ))
#define  OS_MSEC_TO_CPUCYC( msec ) ((OSCpuCycle)( ((OS_CPU_CLOCK/1000) * (u32)(msec)) ))
#define  OS_USEC_TO_CPUCYC( usec ) ((OSCpuCycle)( ((OS_CPU_CLOCK/1000) * (u32)(usec)) / 1000 ))
#define  OS_NSEC_TO_CPUCYC( nsec ) ((OSCpuCycle)( ((OS_CPU_CLOCK/1000) * (u32)(nsec)) / (1000 * 1000) ))

//---- cpu cycle to sec
// 150nsec - 30sec
#define  OS_CPUCYC_TO_SEC(  cyc ) ( ((u32)(cyc) ) / OS_CPU_CLOCK )
#define  OS_CPUCYC_TO_MSEC( cyc ) ( ((u32)(cyc) ) / (OS_CPU_CLOCK/1000) )
#define  OS_CPUCYC_TO_USEC( cyc ) ( ((u32)(cyc) * 1000) / (OS_CPU_CLOCK/1000) )
#define  OS_CPUCYC_TO_NSEC( cyc ) ( ((u32)(cyc) * 1000 * 1000) / (OS_CPU_CLOCK/1000) )


#ifndef SDK_ASM

#define		OS_EXIT_STRING_1		"*** Exit ctr program (status="
#define		OS_EXIT_STRING_2		"%d).\n"
#define		OS_EXIT_STRING			OS_EXIT_STRING_1 OS_EXIT_STRING_2

typedef enum
{
    OS_PROCMODE_USR = HW_PSR_USR_MODE,
    OS_PROCMODE_FIQ = HW_PSR_FIQ_MODE,
    OS_PROCMODE_IRQ = HW_PSR_IRQ_MODE,
    OS_PROCMODE_SVC = HW_PSR_SVC_MODE,
    OS_PROCMODE_ABORT = HW_PSR_ABORT_MODE,
    OS_PROCMODE_UNDEF = HW_PSR_UNDEF_MODE,
    OS_PROCMODE_SYS = HW_PSR_SYS_MODE
}
OSProcMode;

#ifdef SDK_ARM9
#define OS_SVC_STACK_SIZE               0x1000
#define OS_IRQ_STACK_SIZE               0x1000
#else // SDK_MPCORE
#endif // SDK_MPCORE


//---- sec to cpu cycle
// 150nsec - 30sec
static inline OSCpuCycle i_osSecToCpuCycle( u32 sec )
{
    return OS_SEC_TO_CPUCYC( sec );
}

static inline OSCpuCycle i_osMSecToCpuCycle( u32 msec )
{
    return OS_MSEC_TO_CPUCYC( msec );
}

static inline OSCpuCycle i_osUSecToCpuCycle( u32 usec )
{
    return OS_USEC_TO_CPUCYC( usec );
}

static inline OSCpuCycle i_osNSecToCpuCycle( u32 nsec )
{
    return OS_NSEC_TO_CPUCYC( nsec );
}

//---- cpu cycle to sec
// 150nsec - 30sec
static inline u32 i_osCpuCycleToSec( OSCpuCycle cyc )
{
    return OS_CPUCYC_TO_SEC( cyc );
}

static inline u32 i_osCpuCycleToMSec( OSCpuCycle cyc )
{
    return OS_CPUCYC_TO_MSEC( cyc );
}

static inline u32 i_osCpuCycleToUSec( OSCpuCycle cyc )
{
    return OS_CPUCYC_TO_USEC( cyc );
}

static inline u32 i_osCpuCycleToNSec( OSCpuCycle cyc )
{
    return OS_CPUCYC_TO_NSEC( cyc );
}


//============================================================================
//          PROCESSER MODE
//============================================================================
/*---------------------------------------------------------------------------*
  Name:         osGetProcMode

  Description:  Get processor mode from CPSR

  Arguments:    None.

  Returns:      CPU processor mode (field 0x10-0x1f)
 *---------------------------------------------------------------------------*/
OSProcMode osGetProcMode(void);

//============================================================================
//          WAIT
//============================================================================
/*---------------------------------------------------------------------------*
  Name:         i_osWaitCpuCycles

  Description:  Loop and Wait for specified CPU cycles at least

                150nsec - 30sec

  Arguments:    cycles      waiting CPU cycle

  Returns:      None
 *---------------------------------------------------------------------------*/
void i_osWaitCpuCycles( OSCpuCycle cycle );

//============================================================================
//          TERMINATE and HALT
//============================================================================
/*---------------------------------------------------------------------------*
  Name:         osTerminate

  Description:  Halt CPU and loop
  
  Arguments:    None

  Returns:      None
 *---------------------------------------------------------------------------*/
extern void osTerminate(void);

/*---------------------------------------------------------------------------*
  Name:         osHalt

  Description:  Halt CPU
  
  Arguments:    None

  Returns:      None
 *---------------------------------------------------------------------------*/
extern void osHalt(void);

/*---------------------------------------------------------------------------*
  Name:         osExit

  Description:  Display exit string and Terminate.
                This is useful for 'loadrun' tool command.                 
  
  Arguments:    status : exit status

  Returns:      --  (Never return)
 *---------------------------------------------------------------------------*/
extern void osExit(int status);


#endif /* SDK_ASM */

#ifdef __cplusplus
} /* extern "C" */
#endif

/* BROM_OS_SYSTEM_H_ */
#endif