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.

/*
+--------------------------------------------------------------------+
| PROJECT: GSM-MFW (?)                  $Workfile:: mfw_nma.h       $|
| $Author:: Es                          $Revision::  1              $|
| CREATED: 14.10.98                     $Modtime:: 17.05.99 14:17   $|
| STATE  : code                                                      |
+--------------------------------------------------------------------+

	PURPOSE :  Types definitions for MMI framework
    .
*/

#ifndef DEF_MFW_NMA_HEADER
#define DEF_MFW_NMA_HEADER

/* #include "phb.h" RSA 20/12/01 - Removed */
#include"mfw_phb.h" //RSA 20/12/01 - Added

EXTERN void nma_init (void);
EXTERN BOOL nma_response_cb (ULONG opc, void * data);

EXTERN void sAT_PlusCOPSF(UBYTE ** forbidden_id, UBYTE ** fieldstrength);
#ifdef NO_ASCIIZ
EXTERN void sAT_PlusCOPSE(UBYTE *oper, UBYTE format,
                          T_MFW_LNAME *long_name,
                          T_MFW_SNAME *short_name,
                          UBYTE *numeric_name);
#else
EXTERN void sAT_PlusCOPSE(UBYTE *oper, UBYTE format, UBYTE *long_name,
                          UBYTE *short_name, UBYTE *numeric_name);
#endif

#ifdef FF_2TO1_PS
EXTERN T_CAUSE_ps_cause sAT_PlusCREGE (void);
EXTERN void  nm_nitz_info_ind(T_MMREG_INFO_IND * mmr_info_ind);
#else
EXTERN USHORT sAT_PlusCREGE (void);
EXTERN void  nm_nitz_info_ind(T_MMR_INFO_IND * mmr_info_ind);
#endif

#endif