view src/cs/drivers/drv_core/clkm/clkm.h @ 303:f76436d19a7a default tip

!GPRS config: fix long-standing AT+COPS chance hanging bug There has been a long-standing bug in FreeCalypso going back years: sometimes in the AT command bring-up sequence of an ACI-only MS, the AT+COPS command would produce only a power scan followed by cessation of protocol stack activity (only L1 ADC traces), instead of the expected network search sequence. This behaviour was seen in different FC firmware versions going back to Citrine, and seemed to follow some law of chance, not reliably repeatable. This bug has been tracked down and found to be specific to !GPRS configuration, stemming from our TCS2/TCS3 hybrid and reconstruction of !GPRS support that was bitrotten in TCS3.2/LoCosto version. ACI module psa_mms.c, needed only for !GPRS, was missing in the TCS3 version and had to be pulled from TCS2 - but as it turns out, there is a new field in the MMR_REG_REQ primitive that needs to be set correctly, and that psa_mms.c module is the place where this initialization needed to be added.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 08 Jun 2023 08:23:37 +0000
parents 4e78acac3d88
children
line wrap: on
line source

/******************************************************************************
            TEXAS INSTRUMENTS INCORPORATED PROPRIETARY INFORMATION           
                                                                             
   Property of Texas Instruments -- For  Unrestricted  Internal  Use  Only 
   Unauthorized reproduction and/or distribution is strictly prohibited.  This 
   product  is  protected  under  copyright  law  and  trade  secret law as an 
   unpublished work.  Created 1987, (C) Copyright 1997 Texas Instruments.  All 
   rights reserved.                                                            
                  
                                                           
   Filename       	: clkm.h

   Description    	: Header file for the CLKM module

   Project        	: drivers

   Author         	: pmonteil@tif.ti.com  Patrice Monteil.

   Version number   : 1.19

   Date and time    : 07/01/03

   Previous delta 	: 10/19/01 15:25:25

   SCCS file      	: /db/gsm_asp/db_ht96/dsp_0/gsw/rel_0/mcu_l1/release_gprs/mod/emu_p/EMU_P_FRED_CLOCK/drivers1/common/SCCS/s.clkm.h

   Sccs Id  (SID)       : '@(#) clkm.h 1.10 10/23/01 14:34:54 '

 
*****************************************************************************/

#include "l1sw.cfg"
#include "chipset.cfg"
#include "board.cfg"

#if (OP_L1_STANDALONE == 0)
  #include "main/sys_types.h"
#else
  #include "sys_types.h"
#endif

#if (CHIPSET == 12)
    #include "sys_map.h"
#endif

#if (CHIPSET == 12)
  #define CLKM_ARM_CLK        C_MAP_CLKM_BASE   /* CLKM registers addr. */
#else
  #define CLKM_ARM_CLK        MEM_CLKM_ADDR     /* CLKM ARM CLock Control reg.*/
#endif
#define CLKM_MCLK_EN	0x0001 


#if ((CHIPSET == 4) || (CHIPSET == 7) || (CHIPSET == 8) || (CHIPSET == 10) || (CHIPSET == 11) || (CHIPSET == 12))
   #define MASK_CLKIN       0x0006
#endif

#if ((CHIPSET == 4) || (CHIPSET == 7) || (CHIPSET == 8) || (CHIPSET == 10) || (CHIPSET == 11) || (CHIPSET == 12))
  #define CLKM_CLKIN0       0x0002            // Mask to select between DPLL and VTCXO or CLKIN
#else
  #define CLKM_LOW_FRQ	    0x0002            // Mask to select low frequency input CLK_32K 
#endif
#define CLKM_CLKIN_SEL	    0x0004            // Mask to select between VTCXO and CLKIN 

#if ((CHIPSET == 4) || (CHIPSET == 7) || (CHIPSET == 8) || (CHIPSET == 10) || (CHIPSET == 11) || (CHIPSET == 12))
  #define CLKM_ARM_MCLK_XP5 0x0008            // Mask to enable the 1.5 or 2.5 division factor
  #define CLKM_MCLK_DIV     0x0070            // Mask to configure the division factor
#else
  #define MASK_ARM_MCLK_1P5 0x0008            // Mask to enable the 1.5 division factor
  #define CLKM_MCLK_DIV	    0x0030            // Mask to configure the division factor
#endif

#define CLKM_DEEP_PWR	    0x0f00            // Mask to configure deep power
#define CLKM_DEEP_SLEEP	    0x1000            // Mask to configure deep sleep

#if ((CHIPSET == 4) || (CHIPSET == 7) || (CHIPSET == 8) || (CHIPSET == 10) || (CHIPSET == 11) || (CHIPSET == 12))
  #define CLKM_SEL_DPLL     0x0000            // Selection of DPLL for ARM clock generation
  #define CLKM_SEL_VTCXO    0x0001            // Selection of VTCXO for ARM clock generation
  #define CLKM_SEL_CLKIN    0x0003            // Selection of CLKIN for ARM clock generation
  
  #define CLKM_ENABLE_XP5   0x0001            // Enable 1.5 or 2.5 division factor
  #define CLKM_DISABLE_XP5  0x0000            // Disable 1.5 or 2.5 division factor
  
  #define CLKM_ARM_MCLK_DIV_OFFSET 4          // Offset of ARM_MCLK_DIV bits in CNTL_ARM_CLK register
  
  #define CLKM_ARM_CLK_RESET 0x1081           // Reset value of CNTL_ARM_CLK register
#endif

#if (CHIPSET == 12)
  #define CLKM_CNTL_ARM_CLK  (C_MAP_CLKM_BASE + 0x00)
  #define CLKM_CNTL_CLK     (C_MAP_CLKM_BASE + 2)   /* CLKM Clock Control reg. */
#else
  #define CLKM_CNTL_ARM_CLK  (MEM_CLKM_ADDR + 0x00)
  #define CLKM_CNTL_CLK     (MEM_CLKM_ADDR + 2)     /* CLKM Clock Control reg. */
#endif

#define CLKM_IRQ_DIS        0x0001     // IRQ clock is disabled and enabled according to the sleep command
#define CLKM_BRIDGE_DIS	    0x0002     // BRIDGE clock is disabled and enabled according to the sleep command
#define CLKM_TIMER_DIS	    0x0004     // TIMER clock is disabled and enabled according to the sleep command
#if ((CHIPSET == 4) || (CHIPSET == 7) || (CHIPSET == 8) || (CHIPSET == 10) || (CHIPSET == 11) || (CHIPSET == 12))
  #define CLKM_DPLL_DIS     0x0008     // DPLL is set in IDLE when both DSP and ARM are respectively in IDLE3 and sleep mode
#else
  #define CLKM_PLL_SEL	    0x0008     // CLKIN input is connected to the PLL
#endif
#define CLKM_CLKOUT_EN	    0x0010     // Enable CLKOUT(2:0) output clocks
#if (CHIPSET == 4)
  #define CLKM_EN_IDLE3_FLG 0x0020     // DSP idle flag control the API wait state
  #define CLKM_VTCXO_26     0x0040     // VTCXO is divided by 2
#elif (CHIPSET == 6)
  #define CLKM_VTCXO_26     0x0040     // VTCXO is divided by 2
#elif (CHIPSET == 7) || (CHIPSET == 8) || (CHIPSET == 10) || (CHIPSET == 11) || (CHIPSET == 12)
  #define CLKM_EN_IDLE3_FLG 0x0020     // DSP idle flag control the API wait state
  #define CLKM_VCLKOUT_2    0x0040     // VTCXO is divided by 2
  #define CLKM_VTCXO_2      0x0080     // Input clock to DPLL is divided by 2
#endif

#if (CHIPSET == 12)
  #define CLKM_CNTL_RST   (C_MAP_CLKM_BASE + 4)   /* CLKM Reset Control reg. */
#else
  #define CLKM_CNTL_RST   (MEM_CLKM_ADDR + 4)     /* CLKM Reset Control reg. */
#endif
#define CLKM_LEAD_RST 	0x0002
#define CLKM_EXT_RST 	0x0004

#if ((CHIPSET == 4) || (CHIPSET == 7) || (CHIPSET == 8) || (CHIPSET == 10) || (CHIPSET == 11) || (CHIPSET == 12))
  #define DPLL_LOCK         0x0001     // Mask of DPLL lock status
  #define DPLL_BYPASS_DIV   0x000C     // Mask of bypass mode configuration
  #define DPLL_PLL_ENABLE   0x0010     // Enable DPLL
  #define DPLL_PLL_DIV      0x0060     // Mask of division factor configuration
  #define DPLL_PLL_MULT     0x0F80     // Mask of multiply factor configuration

  #define DPLL_BYPASS_DIV_1 0x00       // Configuration of bypass mode divided by 1
  #define DPLL_BYPASS_DIV_2 0x01       // Configuration of bypass mode divided by 2
  #define DPLL_BYPASS_DIV_4 0x10       // Configuration of bypass mode divided by 4
  
  #define DPLL_BYPASS_DIV_OFFSET 2     // Offset of bypass bits configuration
  #define DPLL_PLL_DIV_OFFSET    5     // Offset of division bits configuration
  #define DPLL_PLL_MULT_OFFSET   7     // Offset of multiply bits configuration
  
  #define DPLL_LOCK_DIV_1   0x0000     // Divide by 1 when DPLL is locked
  #define DPLL_LOCK_DIV_2   0x0001     // Divide by 2 when DPLL is locked
  #define DPLL_LOCK_DIV_3   0x0002     // Divide by 3 when DPLL is locked
  #define DPLL_LOCK_DIV_4   0x0003     // Divide by 4 when DPLL is locked
  
#else
  #define CLKM_LEAD_PLL_CNTL (MEM_CLKM_ADDR + 6)     /* Lead PLL */
  #define CLKM_PLONOFF	0x0001         // PLL enable signal
  #define CLKM_PLMUL	0x001e         // Mask of multiply factor configuration
  #define CLKM_PLLNDIV	0x0020         // PLL or divide mode selection
  #define CLKM_PLDIV	0x0040         // Mask of multiply factor configuration
  #define CLKM_LEAD_PLL_CNTL_MSK 0x00ef // Mask of PLL control register
#endif

#if (CHIPSET == 12)
  #define CLKM_CNTL_CLK_DSP (C_MAP_CLKM_BASE + 0x8A)   /* CLKM CNTL_CLK_REG register */
  
  #define CLKM_NB_DSP_DIV_VALUE   4
  
  #define CLKM_DSP_DIV_1    0x00
  #define CLKM_DSP_DIV_1_5  0x01
  #define CLKM_DSP_DIV_2    0x02
  #define CLKM_DSP_DIV_3    0x03
  
  #define CLKM_DSP_DIV_MASK 0x0003
  
  extern const double dsp_div_value[CLKM_NB_DSP_DIV_VALUE];
  
  /*---------------------------------------------------------------
   *  CLKM_DSP_DIV_FACTOR()	
   *--------------------------------------------------------------
   * Parameters : none						
   * Return     :	none						
   * Functionality : Set the DSP division factor			
   *--------------------------------------------------------------*/

  #define CLKM_DSP_DIV_FACTOR(d_dsp_div) (* (volatile SYS_UWORD16 *) CLKM_CNTL_CLK_DSP = d_dsp_div)


  /*---------------------------------------------------------------
   *  CLKM_READ_DSP_DIV()						
   *--------------------------------------------------------------
   * Parameters : none						
   * Return     :	none						
   * Functionality : Read DSP division factor			
   *--------------------------------------------------------------*/

  #define CLKM_READ_DSP_DIV               ((* (volatile SYS_UWORD16 *) CLKM_CNTL_CLK_DSP) & CLKM_DSP_DIV_MASK)
  
  #define CLKM_GET_DSP_DIV_VALUE          dsp_div_value[CLKM_READ_DSP_DIV]

#endif


/*---------------------------------------------------------------
 *  CLKM_SETLEADRESET()						
 *--------------------------------------------------------------
 * Parameters : none						
 * Return     :	none						
 * Functionality : Set the LEAD reset signal
 *--------------------------------------------------------------*/

#define CLKM_SETLEADRESET (* (volatile SYS_UWORD16 *) CLKM_CNTL_RST |= CLKM_LEAD_RST)

/*---------------------------------------------------------------
 *  CLKM_RELEASELEADRESET()					
 *--------------------------------------------------------------
 * Parameters : none						
 * Return     :	none						
 * Functionality : Release the LEAD reset signal		
 *--------------------------------------------------------------*/

#define CLKM_RELEASELEADRESET (* (volatile SYS_UWORD16 *) CLKM_CNTL_RST &= ~CLKM_LEAD_RST)

/*---------------------------------------------------------------
 *  CLKM_SETEXTRESET()						
 *--------------------------------------------------------------
 * Parameters : none						
 * Return     :	none						
 * Functionality : Set the external reset signal		
 *--------------------------------------------------------------*/

#define CLKM_SETEXTRESET ( * (volatile SYS_UWORD16 *) CLKM_CNTL_RST |= CLKM_EXT_RST)

/*---------------------------------------------------------------
 *  CLKM_CLEAREXTRESET()					
 *--------------------------------------------------------------
 * Parameters : none						
 * Return     :	none						
 * Functionality : Clear the external reset signal		
 *--------------------------------------------------------------*/

#define CLKM_CLEAREXTRESET (* (volatile SYS_UWORD16 *) CLKM_CNTL_RST &= ~CLKM_EXT_RST)


/*---------------------------------------------------------------
 *  CLKM_POWERDOWNARM()						
 *--------------------------------------------------------------
 * Parameters : none						
 * Return     :	none						
 * Functionality : Power down the ARM mcu			
 *--------------------------------------------------------------*/
#define  CLKM_POWERDOWNARM (* (volatile SYS_UWORD16 *) CLKM_ARM_CLK &= ~CLKM_MCLK_EN)

/*---------------------------------------------------------------
 *  CLKM_SET1P5()						
 *--------------------------------------------------------------
 * Parameters : none						
 * Return     :	none						
 * Functionality : Set ARM_MCLK_1P5 bit				
 *--------------------------------------------------------------*/

#if ((CHIPSET == 4) || (CHIPSET == 7) || (CHIPSET == 8) || (CHIPSET == 10) || (CHIPSET == 11) || (CHIPSET == 12))
  #define CLKM_SETXP5 ( * (volatile SYS_UWORD16 *) CLKM_ARM_CLK |= CLKM_ARM_MCLK_XP5)
#else
  #define CLKM_SET1P5 ( * (volatile SYS_UWORD16 *) CLKM_ARM_CLK |= 0x0008)
#endif

/*---------------------------------------------------------------
 *  CLKM_RESET1P5()						
 *--------------------------------------------------------------
 * Parameters : none						
 * Return     :	none						
 * Functionality : Reset ARM_MCLK_1P5 bit			
 *--------------------------------------------------------------*/

#if ((CHIPSET == 4) || (CHIPSET == 7) || (CHIPSET == 8) || (CHIPSET == 10) || (CHIPSET == 11) || (CHIPSET == 12))
  #define CLKM_RESETXP5 ( * (volatile SYS_UWORD16 *) CLKM_ARM_CLK &= ~CLKM_ARM_MCLK_XP5)
#else
  #define CLKM_RESET1P5 ( * (volatile SYS_UWORD16 *) CLKM_ARM_CLK &= 0xfff7)
#endif

/*---------------------------------------------------------------
 *  CLKM_INITCNTL()						
 *--------------------------------------------------------------
 * Parameters : value to write in the CNTL register
 * Return     :	none						
 * Functionality :Initialize the CLKM Control Clock register
 *--------------------------------------------------------------*/

#define CLKM_INITCNTL(value) (* (volatile SYS_UWORD16 *) CLKM_CNTL_CLK |= value)


#if ((CHIPSET != 4) && (CHIPSET != 7) && (CHIPSET != 8) && (CHIPSET != 10) && (CHIPSET != 11) && (CHIPSET != 12))
  /*---------------------------------------------------------------
   *  CLKM_INITLEADPLL()						
   *--------------------------------------------------------------
   * Parameters : value to write in the CNTL_PLL LEAD register	
   * Return     :	none						
   * Functionality :Initialize LEAD PLL control register	
   *--------------------------------------------------------------*/

  #define CLKM_INITLEADPLL(value) (* (volatile SYS_UWORD16 *) CLKM_LEAD_PLL_CNTL = value)
#endif

#if ((CHIPSET == 4) || (CHIPSET == 7) || (CHIPSET == 8) || (CHIPSET == 10) || (CHIPSET == 11) || (CHIPSET == 12))
  /*--------------------------------------------------------------
   *  CLKM_DPLL_SWITH_OFF_MODE_CONFIG()                           
   *--------------------------------------------------------------
   * Parameters : None                                            
   * Return     : none                                            
   * Functionality : Configure DPLL switch off mode               
   *--------------------------------------------------------------*/

  #define CLKM_DPLL_SWITH_OFF_MODE_CONFIG (* (volatile SYS_UWORD16 *) CLKM_CNTL_CLK |= \
             (CLKM_DPLL_DIS | CLKM_IRQ_DIS | CLKM_BRIDGE_DIS | CLKM_TIMER_DIS))
             
  /*--------------------------------------------------------------
   *  CLKM_RESET_DPLL_SWITH_OFF_MODE_CONFIG()                     
   *--------------------------------------------------------------
   * Parameters : None                                            
   * Return     : none                                            
   * Functionality : Reset configuration of DPLL switch off mode  
   *--------------------------------------------------------------*/
             
  #define CLKM_RESET_DPLL_SWITH_OFF_MODE_CONFIG (* (volatile SYS_UWORD16 *) CLKM_CNTL_CLK &=\
            ~(CLKM_DPLL_DIS | CLKM_IRQ_DIS | CLKM_BRIDGE_DIS | CLKM_TIMER_DIS))

  /*--------------------------------------------------------------
   *  CLKM_FORCE_API_HOM_IN_IDLE3()                               
   *--------------------------------------------------------------
   * Parameters : None                                            
   * Return     : none                                            
   * Functionality : SAM/HOM wait-state register force to HOM when
   *                 DSP is in IDLE3 mode                         */
  /*--------------------------------------------------------------*/

  #define CLKM_FORCE_API_HOM_IN_IDLE3 (* (volatile SYS_UWORD16 *) CLKM_CNTL_CLK |= (CLKM_EN_IDLE3_FLG))

  #if (CHIPSET == 4)
    /*--------------------------------------------------------------
     *  CLKM_USE_VTCXO_26MHZ()                                      
     *--------------------------------------------------------------
     * Parameters : None                                            
     * Return     : none                                            
     * Functionality : Divide by 2 the clock used by the peripheral 
     *                 when using external VTCXO at 26 MHz instead  
     *                 of 13MHz                                     
     *--------------------------------------------------------------*/

    #define CLKM_USE_VTCXO_26MHZ (* (volatile SYS_UWORD16 *) CLKM_CNTL_CLK |= (CLKM_VTCXO_26))

    /*--------------------------------------------------------------
     *  CLKM_UNUSED_VTCXO_26MHZ()                                   
     *--------------------------------------------------------------
     * Parameters : None                                            
     * Return     : none                                            
     * Functionality : Use VTCXO=13MHz                              
     *--------------------------------------------------------------*/

    #define CLKM_UNUSED_VTCXO_26MHZ (* (volatile SYS_UWORD16 *) CLKM_CNTL_CLK &= ~(CLKM_VTCXO_26))
  #elif (CHIPSET == 7) || (CHIPSET == 8) || (CHIPSET == 10) || (CHIPSET == 11) || (CHIPSET == 12)
    /*--------------------------------------------------------------
     *  CLKM_UNUSED_VTCXO_26MHZ()                                   
     *--------------------------------------------------------------
     * Parameters : None                                            
     * Return     : none                                          
     * Functionality : Use VTCXO=13MHz                              
     *--------------------------------------------------------------*/

    #define CLKM_USE_VTCXO_26MHZ (* (volatile SYS_UWORD16 *) CLKM_CNTL_CLK |= (CLKM_VTCXO_2))

    #define CLKM_UNUSED_VTCXO_26MHZ (* (volatile SYS_UWORD16 *) CLKM_CNTL_CLK &= ~(CLKM_VCLKOUT_2 | CLKM_VTCXO_2))
  #endif

  #if (CHIPSET == 12)
    #define DPLL_SET_PLL_ENABLE (* (volatile SYS_UWORD16 *) C_MAP_DPLL_BASE |= DPLL_PLL_ENABLE)
    #define DPLL_RESET_PLL_ENABLE (* (volatile SYS_UWORD16 *) C_MAP_DPLL_BASE &= ~DPLL_PLL_ENABLE)
  
    #define DPLL_INIT_BYPASS_MODE(d_bypass_mode) { \
          *((volatile SYS_UWORD16 *) C_MAP_DPLL_BASE) &= ~DPLL_BYPASS_DIV; \
          *((volatile SYS_UWORD16 *) C_MAP_DPLL_BASE) |= (d_bypass_mode << DPLL_BYPASS_DIV_OFFSET); \
         }
    
    #define DPLL_INIT_DPLL_CLOCK(d_pll_div, d_pll_mult) { \
          *((volatile SYS_UWORD16 *) C_MAP_DPLL_BASE) &= ~(DPLL_PLL_DIV | DPLL_PLL_MULT); \
          *((volatile SYS_UWORD16 *) C_MAP_DPLL_BASE) |= (d_pll_div << DPLL_PLL_DIV_OFFSET) |\
                                                          (d_pll_mult << DPLL_PLL_MULT_OFFSET); \
         }

    #define DPLL_READ_DPLL_DIV ( ((* (volatile SYS_UWORD16 *) C_MAP_DPLL_BASE) & DPLL_PLL_DIV) >> DPLL_PLL_DIV_OFFSET)
    #define DPLL_READ_DPLL_MUL ( ((* (volatile SYS_UWORD16 *) C_MAP_DPLL_BASE) & DPLL_PLL_MULT)>> DPLL_PLL_MULT_OFFSET)
    #define DPLL_READ_DPLL_LOCK ( (* (volatile SYS_UWORD16 *) C_MAP_DPLL_BASE) & DPLL_LOCK)
  #else
    #define DPLL_SET_PLL_ENABLE (* (volatile SYS_UWORD16 *) MEM_DPLL_ADDR |= DPLL_PLL_ENABLE)
    #define DPLL_RESET_PLL_ENABLE (* (volatile SYS_UWORD16 *) MEM_DPLL_ADDR &= ~DPLL_PLL_ENABLE)
  
    #define DPLL_INIT_BYPASS_MODE(d_bypass_mode) { \
          *((volatile SYS_UWORD16 *) MEM_DPLL_ADDR) &= ~DPLL_BYPASS_DIV; \
          *((volatile SYS_UWORD16 *) MEM_DPLL_ADDR) |= (d_bypass_mode << DPLL_BYPASS_DIV_OFFSET); \
         }
    
    #define DPLL_INIT_DPLL_CLOCK(d_pll_div, d_pll_mult) { \
          *((volatile SYS_UWORD16 *) MEM_DPLL_ADDR) &= ~(DPLL_PLL_DIV | DPLL_PLL_MULT); \
          *((volatile SYS_UWORD16 *) MEM_DPLL_ADDR) |= (d_pll_div << DPLL_PLL_DIV_OFFSET) |\
                                                          (d_pll_mult << DPLL_PLL_MULT_OFFSET); \
         }

    #define DPLL_READ_DPLL_DIV ( ((* (volatile SYS_UWORD16 *) MEM_DPLL_ADDR) & DPLL_PLL_DIV) >> DPLL_PLL_DIV_OFFSET)
    #define DPLL_READ_DPLL_MUL ( ((* (volatile SYS_UWORD16 *) MEM_DPLL_ADDR) & DPLL_PLL_MULT)>> DPLL_PLL_MULT_OFFSET)
    #define DPLL_READ_DPLL_LOCK ( (* (volatile SYS_UWORD16 *) MEM_DPLL_ADDR) & DPLL_LOCK)
  #endif /* (CHIPSET == 12) */


#endif

/* ----- Prototypes ----- */

#if (BOARD == 34)
  void CLKM_InitARMClock(int src, int div);
#elif ((CHIPSET == 4) || (CHIPSET == 7) || (CHIPSET == 8) || (CHIPSET == 10) || (CHIPSET == 11) || (CHIPSET == 12))
  void CLKM_InitARMClock(SYS_UWORD16 clk_src, SYS_UWORD16 clk_div, SYS_UWORD16 clk_xp5);
#else
  void CLKM_InitARMClock(SYS_UWORD16 clk_src, SYS_UWORD16 clk_div);
#endif

#if (BOARD == 34)
  void CLKM_SetMclkDiv(int div);
  void CLKM_EnableDPLL(int enable);
  void CLKM_EnableSharedMemClock(int enable);
  void CLKM_InitLeadClock(int onoff, int mul, int ndiv, int div);
#endif

void wait_ARM_cycles(SYS_UWORD32 cpt_loop);
void initialize_wait_loop(void);
SYS_UWORD32 convert_nanosec_to_cycles(SYS_UWORD32 time);