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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 35f7a1dc9f7d
children
line wrap: on
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/*
+--------------------------------------------------------------------------+
| PROJECT : PROTOCOL STACK                                                 |
| FILE    : p_rrlp.val                                                     |
| SOURCE  : "sap\rrlp.pdf"                                                 |
| LastModified : "2002-11-13"                                              |
| IdAndVersion : "8443.102.02.100"                                         |
| SrcFileTime  : "Thu Nov 29 09:53:06 2007"                                |
| Generated by CCDGEN_2.5.5A on Fri Oct 14 21:41:52 2016                   |
|           !!DO NOT MODIFY!!DO NOT MODIFY!!DO NOT MODIFY!!                |
+--------------------------------------------------------------------------+
*/

/* PRAGMAS
 * PREFIX                 : NONE
 * COMPATIBILITY_DEFINES  : NO (require PREFIX)
 * ALWAYS_ENUM_IN_VAL_FILE: NO
 * ENABLE_GROUP: NO
 * CAPITALIZE_TYPENAME: NO
 */


#ifndef P_RRLP_VAL
#define P_RRLP_VAL


#define CDG_ENTER__P_RRLP_VAL

#define CDG_ENTER__FILENAME _P_RRLP_VAL
#define CDG_ENTER__P_RRLP_VAL__FILE_TYPE CDGINC
#define CDG_ENTER__P_RRLP_VAL__LAST_MODIFIED _2002_11_13
#define CDG_ENTER__P_RRLP_VAL__ID_AND_VERSION _8443_102_02_100

#define CDG_ENTER__P_RRLP_VAL__SRC_FILE_TIME _Thu_Nov_29_09_53_06_2007

#include "CDG_ENTER.h"

#undef CDG_ENTER__P_RRLP_VAL

#undef CDG_ENTER__FILENAME


/*
 * Value constants for VAL_cause
 */
#define RRLP_METHOD_INVALID            (0x7)      /* Position method is not supported */
#define RRLP_REF_BTS_INVALID           (0xa)      /* The ref. BTS for E-OTD is not the serving BTS */
#define RRLP_HANDOVER                  (0x14)     /* The measurement procedure was interrupted by a handover. No RRLP specific error message is created. */

/*
 * Value constants for VAL_exp_otd
 */

/*
 * Value constants for VAL_loc_method
 */
#define EOTD_METHOD                    (0x0)      
#define GPS_METOD                      (0x1)      
#define GPS_OR_EOTD_METOD              (0x2)      

/*
 * Value constants for VAL_mfrm_offset
 */

/*
 * Value constants for VAL_otd_type
 */
#define ROUGH_RTD                      (0x0)      /* only rough RTD has been provided by the NW */
#define EXPECTED_OTD                   (0x1)      /* only expectedOTD has been provided by the NW */
#define BOTH_OTD                       (0x2)      /* Both OTD / RTD types have been provided by the NW */

/*
 * Value constants for VAL_pos_method
 */
#define MS_ASSISTED                    (0x0)      
#define MS_BASED                       (0x1)      
#define MS_BASED_PREF                  (0x2)      
#define MS_ASSISTED_PREF               (0x3)      

/*
 * Value constants for VAL_rough_rtd
 */

/*
 * Value constants for VAL_ta_correction_present
 */
#define TA_PRESENT                     (0x1)      /* TA present                     */
#define TA_NOT_PRESENT                 (0x0)      /* TA NOT present                 */

/*
 * Value constants for VAL_uncertainty
 */
#define UNC_MAX_2BIT                   (0x0)      /* uncertainty in bits. 0 - 2 bits */
#define UNC_MAX_4BIT                   (0x1)      /* uncertainty in bits. 3 - 4 bits */
#define UNC_MAX_8BIT                   (0x2)      /* uncertainty in bits. 5 - 8 bits */
#define UNC_MAX_12BIT                  (0x3)      /* uncertainty in bits. 9 - 12 bits */
#define UNC_MAX_16BIT                  (0x4)      /* uncertainty in bits. 13 - 16 bits */
#define UNC_MAX_22BIT                  (0x5)      /* uncertainty in bits. 17 - 22 bits */
#define UNC_MAX_30BIT                  (0x6)      /* uncertainty in bits. 23 - 30 bits */
#define UNC_GT_30BIT                   (0x7)      /* uncertainty in bits.  > 30 bits */

/*
 * user defined constants
 */
#define R_NUM_MEAS_SETS                (0x3)      
#define R_MAX_REF_NEIGH_BTS            (0xf)      
#define MAX_NCELL_EOTD                 (0xf)      

#include "CDG_LEAVE.h"


#endif