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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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;********************************************************************************
;*** File           : 8010_142_smreg_sap.pdf
;*** Creation       : Wed Mar 11 09:57:52 CST 2009
;*** XSLT Processor : Apache Software Foundation / http://xml.apache.org/xalan-j / supports XSLT-Ver: 1
;*** Copyright      : (c) Texas Instruments AG, Berlin Germany 2002
;********************************************************************************
;*** Document Type  : Service Access Point Specification
;*** Document Name  : 8010_142_smreg_sap
;*** Document No.   : 8010.142.02.011
;*** Document Date  : 2003-08-22
;*** Document Status: APPROVED
;*** Document Author: MVJ
;********************************************************************************



PRAGMA 	SRC_FILE_TIME 	"Thu Nov 29 09:28:36 2007"
PRAGMA 	LAST_MODIFIED 	"2003-08-22"
PRAGMA 	ID_AND_VERSION 	"8010.142.02.011"
PRAGMA 	PREFIX 	SMREG 	; Prefix for this document
PRAGMA 	ALLWAYS_ENUM_IN_VAL_FILE 	YES 	; Enumeration values in value file
PRAGMA 	ENABLE_GROUP 	NO 	; Enable h-file grouping
PRAGMA 	COMPATIBILITY_DEFINES 	NO 	; Compatible to the old #defines






VALTAB 	VAL_pdp_type
VAL 	1 	PDP_PPP 	"PDP type PPP"
VAL 	15 	PDP_EMPTY 	"Dynamic address assignment in effect"
VAL 	33 	PDP_IPV4 	"IP version 4"
VAL 	87 	PDP_IPV6 	"IP version 6"




VAR 	apn_buf 	"Access point name value" 	B


VAR 	pdp_type 	"PDP type" 	B

VAL 	@p_8010_142_smreg_sap - VAL_pdp_type@ 	




COMP 	apn 	 "access point name"
{
 	apn_buf 	[3..102] 	 ; Access point name value
}






; SMREG_CONFIGURE_REQ 	0x2600
; SMREG_PDP_ACTIVATE_REQ 	0x2601
; SMREG_PDP_ACTIVATE_CNF 	0x6600
; SMREG_PDP_ACTIVATE_IND 	0x6602
; SMREG_PDP_ACTIVATE_REJ 	0x6601
; SMREG_PDP_ACTIVATE_REJ_RES 	0x2604
; SMREG_PDP_ACTIVATE_SEC_REQ 	0x2606
; SMREG_PDP_ACTIVATE_SEC_CNF 	0x6608
; SMREG_PDP_ACTIVATE_SEC_REJ 	0x6609
; SMREG_PDP_DEACTIVATE_REQ 	0x2602
; SMREG_PDP_DEACTIVATE_CNF 	0x6603
; SMREG_PDP_DEACTIVATE_IND 	0x6604
; SMREG_PDP_MODIFY_REQ 	0x2605
; SMREG_PDP_MODIFY_CNF 	0x6606
; SMREG_PDP_MODIFY_IND 	0x6605
; SMREG_PDP_MODIFY_REJ 	0x6607



PRIM 	SMREG_CONFIGURE_REQ 	0x2600
{
 	EXTERN @p_8010_152_ps_include - rat@ 	rat 	 ; RAT
 	EXTERN @p_8010_152_ps_include - sgsn_rel@ 	sgsn_rel 	 ; network release
}






PRIM 	SMREG_PDP_ACTIVATE_REQ 	0x2601
{
 	EXTERN @p_8010_137_nas_include - nsapi@ 	nsapi 	 ; Network layer service access point identifier
 	EXTERN @p_8010_137_nas_include - ti@ 	ti 	 ; Transaction identifier
 	EXTERN @p_8010_137_nas_include - comp_params@ 	comp_params 	 ; Compression parameters
 	EXTERN @p_8010_152_ps_include - qos@ 	qos 	 ; Requested quality of service
 	EXTERN @p_8010_152_ps_include - min_qos@ 	min_qos 	 ; Minimum requested QoS
 	pdp_type 	 ; PDP type
 	EXTERN @p_8010_137_nas_include - ip_address@ 	ip_address 	 ; PDP address
 	apn 	 ; Access point name
 	< () 	EXTERN @p_8010_137_nas_include - tft@ 	tft 	> 	 ; Traffic Flow Template; R99
 	EXTERN @p_8010_152_ps_include - sdu@ 	sdu 	 ; PDP config options
}






PRIM 	SMREG_PDP_ACTIVATE_CNF 	0x6600
{
 	EXTERN @p_8010_137_nas_include - nsapi@ 	nsapi 	 ; Network layer service access point identifier
 	pdp_type 	 ; PDP type
 	EXTERN @p_8010_152_ps_include - qos@ 	qos 	 ; Quality of service
 	EXTERN @p_8010_137_nas_include - comp_params@ 	comp_params 	 ; Compression parameters
 	EXTERN @p_8010_137_nas_include - ip_address@ 	ip_address 	 ; PDP address
 	EXTERN @p_8010_152_ps_include - sdu@ 	sdu 	 ; PDP config options
}






PRIM 	SMREG_PDP_ACTIVATE_IND 	0x6602
{
 	EXTERN @p_8010_137_nas_include - ti@ 	ti 	 ; transaction identifier
 	pdp_type 	 ; PDP type
 	EXTERN @p_8010_137_nas_include - ip_address@ 	ip_address 	 ; PDP address
 	apn 	 ; access point name
}






PRIM 	SMREG_PDP_ACTIVATE_REJ 	0x6601
{
 	EXTERN @p_8010_137_nas_include - nsapi@ 	nsapi 	 ; Network layer service access point identifier
 	EXTERN @p_8010_153_cause_include - ps_cause@ 	ps_cause 	 ; Cause of rejection
}






PRIM 	SMREG_PDP_ACTIVATE_REJ_RES 	0x2604
{
 	EXTERN @p_8010_137_nas_include - ti@ 	ti 	 ; transaction identifier
 	EXTERN @p_8010_153_cause_include - ps_cause@ 	ps_cause 	 ; cause of rejection
}






PRIM 	SMREG_PDP_ACTIVATE_SEC_REQ 	0x2606
{
 	EXTERN @p_8010_137_nas_include - nsapi@ 	nsapi 	 ; Network layer service access point identifier
 	EXTERN @p_8010_137_nas_include - pri_nsapi@ 	pri_nsapi 	 ; Primary NSAPI
 	EXTERN @p_8010_137_nas_include - ti@ 	ti 	 ; Transaction identifier
 	EXTERN @p_8010_137_nas_include - comp_params@ 	comp_params 	 ; Compression parameters
 	EXTERN @p_8010_152_ps_include - qos@ 	qos 	 ; Requested quality of service
 	EXTERN @p_8010_152_ps_include - min_qos@ 	min_qos 	 ; Minimum requested QoS
 	< () 	EXTERN @p_8010_137_nas_include - tft@ 	tft 	> 	 ; Traffic flow template
}






PRIM 	SMREG_PDP_ACTIVATE_SEC_CNF 	0x6608
{
 	EXTERN @p_8010_137_nas_include - nsapi@ 	nsapi 	 ; network layer service access point identifier
 	EXTERN @p_8010_152_ps_include - qos@ 	qos 	 ; quality of service
}






PRIM 	SMREG_PDP_ACTIVATE_SEC_REJ 	0x6609
{
 	EXTERN @p_8010_137_nas_include - nsapi@ 	nsapi 	 ; network layer service access point identifier
 	EXTERN @p_8010_153_cause_include - ps_cause@ 	ps_cause 	 ; cause of rejection
}






PRIM 	SMREG_PDP_DEACTIVATE_REQ 	0x2602
{
 	EXTERN @p_8010_137_nas_include - nsapi_set@ 	nsapi_set 	 ; Set of network layer service access point identifiers
 	EXTERN @p_8010_152_ps_include - rel_ind@ 	rel_ind 	 ; Local deactivation flag
}






PRIM 	SMREG_PDP_DEACTIVATE_CNF 	0x6603
{
 	EXTERN @p_8010_137_nas_include - nsapi_set@ 	nsapi_set 	 ; Set of network layer service access point identifiers
}






PRIM 	SMREG_PDP_DEACTIVATE_IND 	0x6604
{
 	EXTERN @p_8010_137_nas_include - nsapi_set@ 	nsapi_set 	 ; Set of network layer service access point identifiers
 	EXTERN @p_8010_153_cause_include - ps_cause@ 	ps_cause 	 ; Deactivation cause
}






PRIM 	SMREG_PDP_MODIFY_REQ 	0x2605
{
 	EXTERN @p_8010_137_nas_include - nsapi@ 	nsapi 	 ; network layer service access point identifier
 	EXTERN @p_8010_152_ps_include - qos@ 	qos 	 ; requested quality of service
 	EXTERN @p_8010_152_ps_include - min_qos@ 	min_qos 	 ; minimum quality of service
 	< () 	EXTERN @p_8010_137_nas_include - tft@ 	tft 	> 	 ; traffic flow template
}






PRIM 	SMREG_PDP_MODIFY_CNF 	0x6606
{
 	EXTERN @p_8010_137_nas_include - nsapi@ 	nsapi 	 ; network layer service access point identifier
 	EXTERN @p_8010_152_ps_include - qos@ 	qos 	 ; quality of service
}






PRIM 	SMREG_PDP_MODIFY_IND 	0x6605
{
 	EXTERN @p_8010_137_nas_include - nsapi@ 	nsapi 	 ; Network layer service access point identifier
 	EXTERN @p_8010_152_ps_include - qos@ 	qos 	 ; Quality of service; Optional
 	EXTERN @p_8010_137_nas_include - ip_address@ 	ip_address 	 ; PDP address; R99, Optional
}






PRIM 	SMREG_PDP_MODIFY_REJ 	0x6607
{
 	EXTERN @p_8010_137_nas_include - nsapi@ 	nsapi 	 ; network layer service access point identifier
 	EXTERN @p_8010_153_cause_include - ps_cause@ 	ps_cause 	 ; cause of rejection
}