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view src/ui/bmi/mmiEm.h @ 220:0ed36de51973

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ABB semaphore protection overhaul The ABB semaphone protection logic that came with TCS211 from TI was broken in several ways: * Some semaphore-protected functions were called from Application_Initialize() context. NU_Obtain_Semaphore() called with NU_SUSPEND fails with NU_INVALID_SUSPEND in this context, but the return value wasn't checked, and NU_Release_Semaphore() would be called unconditionally at the end. The latter call would increment the semaphore count past 1, making the semaphore no longer binary and thus no longer effective for resource protection. The fix is to check the return value from NU_Obtain_Semaphore() and skip the NU_Release_Semaphore() call if the semaphore wasn't properly obtained. * Some SPI hardware manipulation was being done before entering the semaphore- protected critical section. The fix is to reorder the code: first obtain the semaphore, then do everything else. * In the corner case of L1/DSP recovery, l1_abb_power_on() would call some non-semaphore-protected ABB & SPI init functions. The fix is to skip those calls in the case of recovery. * A few additional corner cases existed, all of which are fixed by making ABB semaphore protection 100% consistent for all ABB functions and code paths. There is still one remaining problem of priority inversion: suppose a low- priority task calls an ABB function, and some medium-priority task just happens to preempt right in the middle of that semaphore-protected ABB operation. Then the high-priority SPI task is locked out for a non-deterministic time until that medium-priority task finishes its work and goes back to sleep. This priority inversion problem remains outstanding for now.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 26 Apr 2021 20:55:25 +0000
parents d61a07309733
children
line wrap: on
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#ifndef _MMI_EM_H_
#define MMI_EM_H_
/*******************************************************************************

                    CONDAT (UK)

********************************************************************************

 This software product is the property of Condat (UK) Ltd and may not be
 disclosed to any third party without the express permission of the owner.

********************************************************************************

 $Project name: Basic MMI
 $Project code: BMI (6349)
 $Module:       Engineering mode
 $File:         MmiEm.h
 $Revision:     1.0

 $Author:       Condat(UK)
 $Date:         23/09/02

********************************************************************************

 Description:

     Handles Engineering mode at MMI level

********************************************************************************
 $History: MmiEm.c

    Apr 24, 2006    ERT: OMAPS00067603 x0043642
    Description: Engineering mode
    Solution:  Added new engineering mode function prototypes to satisfy Neptune engineering mode
    requirements.

 $End*/


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

                                Include files

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



#include "mfw_mfw.h"
#include "mfw_mnu.h"


/******************************Function Prototypes*******************************/
void mmi_em_init(void);

void mmi_em_exit(void);

//#ifdef TI_PS_FF_EM
#if defined (TI_PS_FF_EM) || defined (MMI_EM_ENABLED)
/*Starts the engineering mode menu*/
void mmi_em_start_eng_mode_menus(T_MFW_HND parent);
#endif

#ifndef NEPTUNE_BOARD


/*Called from menu; begins process to display Mobile Information*/
int Mmi_em_display_mobile_info_data(MfwMnu* m, MfwMnuItem* i);

/*Called from menu; begins process to display Serving Cell parameters*/
int Mmi_em_display_serving_cell_params(MfwMnu* m, MfwMnuItem* i);

/*Called from menu; begins process to display Neighbouring Cell parameters*/
int Mmi_em_display_neighbour_cell_params(MfwMnu* m, MfwMnuItem* i);

/*Called from menu; begins process to display Locationparameters*/
int Mmi_em_display_location_params(MfwMnu* m, MfwMnuItem*i );

/*begins process to display Ciphering, hopping and discontinuous transmission parameters*/
int Mmi_em_display_ciph_hop_DTX_params(MfwMnu* m, MfwMnuItem* i);

/*Called from menu; begins process to display GPRS specific parameters*/
int Mmi_em_display_GPRS_params(MfwMnu* m, MfwMnuItem* i);

#else /* if NEPTUNE_BOARD */

/*Called from menu; begins process to display Serving Cell parameters*/
int Mmi_em_start(MfwMnu* m, MfwMnuItem* i);


#endif  /*ifndef NEPTUNE_BOARD */

#endif