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abb_inth.c: check all interrupt causes, not just one The original code used if - else if - else if etc constructs, thus the first detected interrupt was the only one handled. However, Iota ITSTATREG is a clear-on-read register, thus if we only handle the first detected interrupt and skip checking the others, then the other interrupts will be lost, if more than one interrupt happened to occur in one ABB interrupt handling cycle - a form of rare race condition. Change the code to check all interrupts that were read in this cycle.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 13 Jun 2021 18:17:53 +0000
parents 35f7a1dc9f7d
children
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;********************************************************************************
;*** File           : mnss.pdf
;*** Creation       : Wed Mar 11 09:58:27 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  : mnss
;*** Document No.   : 6147.102.97.104
;*** Document Date  : 2002-08-01
;*** Document Status: BEING_PROCESSED
;*** Document Author: HM
;********************************************************************************



PRAGMA 	SRC_FILE_TIME 	"Thu Nov 29 09:48:44 2007"
PRAGMA 	LAST_MODIFIED 	"2002-08-01"
PRAGMA 	ID_AND_VERSION 	"6147.102.97.104"



CONST 	FACILITY_LEN 	251 	; Max. length of facility considering L2 constraints
CONST 	VERSION_LEN 	8 	; 
EXTERN CONST 	@p_gsmcom - SS_ORIGINATING_ENTITY@ 	SS_ORIGINATING_ENTITY 	; mask for indicating the originating entity of a cause is SS



VALTAB 	VAL_ti
VAL 	0 - 6 	"ms originated identifier"
VAL 	8 - 14 	"ms terminated transaction"
VAL 	7 	TI_RES_MO 	"reserved"
VAL 	15 	TI_RES_MT 	"reserved"

VALTAB 	VAL_cause
VAL 	0b0000011000000000 	MNSS_CAUSE_UNASSIGN 	"Unassigned (unallocated) Note 9 number"
VAL 	0b0000011000000011 	MNSS_CAUSE_NO_ROUTE 	"No route to destination"
VAL 	0b0000011000000110 	MNSS_CAUSE_CHAN_UNACCEPT 	"Channel unacceptable"
VAL 	0b0000011000001000 	MNSS_CAUSE_BARRED 	"Operator determined barring"
VAL 	0b0000011000010000 	MNSS_CAUSE_CALL_CLEAR 	"Normal call clearing"
VAL 	0b0000011000010001 	MNSS_CAUSE_USER_BUSY 	"User busy"
VAL 	0b0000011000010010 	MNSS_CAUSE_NO_RESPONSE 	"No user responding"
VAL 	0b0000011000010011 	MNSS_CAUSE_ALERT_NO_ANSWER 	"User alerting, no answer"
VAL 	0b0000011000010101 	MNSS_CAUSE_CALL_REJECT 	"Call rejected"
VAL 	0b0000011000010110 	MNSS_CAUSE_NUM_CHANGED 	"Number changed"
VAL 	0b0000011000011001 	MNSS_CAUSE_PREEMPTION 	"Pre-emption"
VAL 	0b0000011000011010 	MNSS_CAUSE_USER_CLEAR 	"Non selected user clearing"
VAL 	0b0000011000011011 	MNSS_CAUSE_DEST_ORDER 	"Destination out of order"
VAL 	0b0000011000011100 	MNSS_CAUSE_NUM_FORMAT 	"Invalid number format (incomplete number)"
VAL 	0b0000011000011101 	MNSS_CAUSE_FACILITY_REJECT 	"Facility rejected"
VAL 	0b0000011000011110 	MNSS_CAUSE_STATUS_ENQUIRY 	"Response to STATUS ENQUIRY"
VAL 	0b0000011000011111 	MNSS_CAUSE_UNSPECIFIED 	"Normal, unspecified"
VAL 	0b0000011000100010 	MNSS_CAUSE_NO_CHAN_AVAIL 	"No circuit/channel available"
VAL 	0b0000011000100110 	MNSS_CAUSE_NETWORK_ORDER 	"Network out of order"
VAL 	0b0000011000101001 	MNSS_CAUSE_TEMP_FAIL 	"Temporary failure"
VAL 	0b0000011000101010 	MNSS_CAUSE_SWITCH_CONGEST 	"Switching equipment congestion"
VAL 	0b0000011000101011 	MNSS_CAUSE_INFO_DISCARD 	"Access information discarded"
VAL 	0b0000011000101100 	MNSS_CAUSE_REQ_CHAN_UNAVAIL 	"requested circuit/channel not available"
VAL 	0b0000011000101111 	MNSS_CAUSE_RESOURCE_UNAVAIL 	"Resources unavailable, unspecified"
VAL 	0b0000011000110001 	MNSS_CAUSE_QOS_UNAVAIL 	"Quality of service unavailable"
VAL 	0b0000011000110010 	MNSS_CAUSE_FACILITY_UNSUBSCRIB 	"Requested facility not subscribed"
VAL 	0b0000011000110111 	MNSS_CAUSE_BARRED_IN_CUG 	"Incoming calls barred within the CUG"
VAL 	0b0000011000111001 	MNSS_CAUSE_BEARER_CAP_AUTHORIZ 	"Bearer capability not authorized"
VAL 	0b0000011000111010 	MNSS_CAUSE_BEARER_CAP_UNAVAIL 	"Bearer capability not presently available"
VAL 	0b0000011000111111 	MNSS_CAUSE_SERVICE_UNAVAIL 	"Service or option not available, unspecified"
VAL 	0b0000011001000001 	MNSS_CAUSE_BEARER_NOT_IMPLEM 	"Bearer service not implemented"
VAL 	0b0000011001000100 	MNSS_CAUSE_ACM_MAX 	"ACM equal to or greater than ACMmax"
VAL 	0b0000011001000101 	MNSS_CAUSE_FACILITY_NOT_IMPLEM 	"Requested facility not implemented"
VAL 	0b0000011001000110 	MNSS_CAUSE_RESTICT_BEARER_CAP 	"Only restricted digital information bearer capability is available"
VAL 	0b0000011001001111 	MNSS_CAUSE_SERVICE_NOT_IMPLEM 	"Service or option not implemented, unspecified"
VAL 	0b0000011001010001 	MNSS_CAUSE_INVALID_TI 	"Invalid transaction identifier value"
VAL 	0b0000011001010111 	MNSS_CAUSE_USER_NOT_IN_CUG 	"User not member of CUG"
VAL 	0b0000011001011000 	MNSS_CAUSE_INCOMPAT_DEST 	"Incompatible destination"
VAL 	0b0000011001011011 	MNSS_CAUSE_INVALID_TRANS_NET 	"Invalid transit network selection"
VAL 	0b0000011001011111 	MNSS_CAUSE_INCORRECT_MESSAGE 	"Semantically incorrect message"
VAL 	0b0000011001100000 	MNSS_CAUSE_INVALID_MAND_INFO 	"Invalid mandatory information"
VAL 	0b0000011001100001 	MNSS_CAUSE_MESSAGE_TYPE_NOT_IMPLEM 	"Message type non-existent or not implemented"
VAL 	0b0000011001100010 	MNSS_CAUSE_MESSAGE_TYPE_INCOMPAT 	"Message type not compatible with protocol state"
VAL 	0b0000011001100011 	MNSS_CAUSE_INFO_ELEM_NOT_IMPLEM 	"Information element non existent or not implemented"
VAL 	0b0000011001100100 	MNSS_CAUSE_COND_INFO_ELEM 	"Conditional IE error"
VAL 	0b0000011001100101 	MNSS_CAUSE_MESSAGE_INCOMPAT 	"Message not compatible with protocol state"
VAL 	0b0000011001100110 	MNSS_CAUSE_TIMER 	"Recovery on timer expiry"
VAL 	0b0000011001101111 	MNSS_CAUSE_PROTOCOL 	"Protocol error, unspecified"
VAL 	0b0000011001111111 	MNSS_CAUSE_INTERWORKING 	"Interworking, unspecified"
VAL 	0b1000011011111111 	MNSS_CAUSE_NO_NET_CAUSE 	"Network initiated without cause"




VAR 	ti 	"Transaction Identifier" 	B

VAL 	@p_mnss - VAL_ti@ 	

VAR 	l_fac 	"facility length" 	S


VAR 	o_fac 	"facility offset" 	S


VAR 	fac 	"facility content" 	B


VAR 	cause 	"cause" 	S

VAL 	@p_mnss - VAL_cause@ 	

VAR 	len 	"length of ss version" 	B


VAR 	ver 	"ss version content" 	B





COMP 	fac_inf 	 "facility information"
{
 	l_fac 	 ; facility length
 	o_fac 	 ; facility offset
 	fac 	[FACILITY_LEN] 	 ; facility content
}



COMP 	ss_ver 	 "ss version"
{
 	len 	 ; length of ss version
 	ver 	[VERSION_LEN] 	 ; ss version content
}






; MNSS_BEGIN_REQ 	0x8000000C
; MNSS_FACILITY_REQ 	0x8001000C
; MNSS_END_REQ 	0x8002000C
; MNSS_BEGIN_IND 	0x8000400C
; MNSS_FACILITY_IND 	0x8001400C
; MNSS_END_IND 	0x8002400C



PRIM 	MNSS_BEGIN_REQ 	0x8000000C
{
 	ti 	 ; transaction identifier
 	fac_inf 	 ; facility information
 	ss_ver 	 ; ss version
}






PRIM 	MNSS_FACILITY_REQ 	0x8001000C
{
 	ti 	 ; transaction identifier
 	fac_inf 	 ; facility information
 	ss_ver 	 ; ss version
}






PRIM 	MNSS_END_REQ 	0x8002000C
{
 	ti 	 ; transaction identifier
 	fac_inf 	 ; facility information
}






PRIM 	MNSS_BEGIN_IND 	0x8000400C
{
 	ti 	 ; transaction identifier
 	fac_inf 	 ; facility information
}






PRIM 	MNSS_FACILITY_IND 	0x8001400C
{
 	ti 	 ; transaction identifier
 	fac_inf 	 ; facility information
}






PRIM 	MNSS_END_IND 	0x8002400C
{
 	ti 	 ; transaction identifier
 	cause 	 ; cause; The following causes can occur within this primitive: all those mentioned in 4.3 and all possible within the MMSS_RELEASE_IND and MMSS_ERROR_IND primitives of the MMSS SAP
 	fac_inf 	 ; facility information
}