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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           : ipa.pdf
;*** Creation       : Wed Mar 11 09:58:13 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  : ipa
;*** Document No.   : 8444.104.02.007
;*** Document Date  : 2003-08-30
;*** Document Status: BEING_PROCESSED
;*** Document Author: Jacek
;********************************************************************************



PRAGMA 	SRC_FILE_TIME 	"Thu Nov 29 09:43:54 2007"
PRAGMA 	LAST_MODIFIED 	"2003-08-30"
PRAGMA 	ID_AND_VERSION 	"8444.104.02.007"



CONST 	IPA_ENTITY_NAME_LEN 	6 	; maximum length of entity name including NULL



VALTAB 	VAL_dti_conn
VAL 	0 	IPA_CONNECT_DTI 	"Connect DTI2 to IP"
VAL 	1 	IPA_DISCONNECT_DTI 	"Disconnect DTI2 from IP"

VALTAB 	VAL_link_id
VAL 	0 	IPA_LINK_ID_DEFAULT 	"Default link id"

VALTAB 	VAL_dti_direction
VAL 	0 	IPA_DTI_TO_HIGHER_LAYER 	"DTI2 used normally"
VAL 	1 	IPA_DTI_TO_LOWER_LAYER 	"DTI2 is inverted"

VALTAB 	VAL_cmd
VAL 	0 	IPA_CONFIG_UP 	"enable the interface"
VAL 	1 	IPA_CONFIG_DOWN 	"disable the interface"

VALTAB 	VAL_ack_flag
VAL 	0 	IPA_CONFIG_ACK 	"Acknowledged"
VAL 	1 	IPA_CONFIG_NAK 	"not acknowledged"

VALTAB 	VAL_all_down
VAL 	0 	IPA_ALLDOWN_FALSE 	">= 1 Interface still up"
VAL 	1 	IPA_ALLDOWN_TRUE 	"all interfaces down"




VAR 	dti_conn 	"DTI2 connect" 	B

VAL 	@p_ipa - VAL_dti_conn@ 	

VAR 	link_id 	"Link identifier" 	L

VAL 	@p_ipa - VAL_link_id@ 	

VAR 	dti_direction 	"DTI2 direction" 	B

VAL 	@p_ipa - VAL_dti_direction@ 	

VAR 	ip 	"IP address" 	L


VAR 	peer_ip 	"peer IP address" 	L


VAR 	mtu 	"maximum transfer unit" 	S


VAR 	cmd 	"Command" 	B

VAL 	@p_ipa - VAL_cmd@ 	

VAR 	ack_flag 	"acknowledge flag" 	B

VAL 	@p_ipa - VAL_ack_flag@ 	

VAR 	all_down 	"all interfaces down flag" 	B

VAL 	@p_ipa - VAL_all_down@ 	

VAR 	entity_name 	"name of an neighbour entity" 	B








; IPA_DTI_REQ 	0x8000003C
; IPA_DTI_CNF 	0x8000403C
; IPA_DTI_IND 	0x8001403C
; IPA_CONFIG_REQ 	0x8001003C
; IPA_CONFIG_CNF 	0x8002403C



PRIM 	IPA_DTI_REQ 	0x8000003C
{
 	dti_conn 	 ; DTI connect
 	entity_name 	[IPA_ENTITY_NAME_LEN] 	 ; entity name
 	link_id 	 ; link identifier
 	dti_direction 	 ; DTI direction
}






PRIM 	IPA_DTI_CNF 	0x8000403C
{
 	dti_conn 	 ; DTI connect
 	link_id 	 ; link identifier
}






PRIM 	IPA_DTI_IND 	0x8001403C
{
 	link_id 	 ; link identifier
}






PRIM 	IPA_CONFIG_REQ 	0x8001003C
{
 	ip 	 ; IP address
 	peer_ip 	 ; peer IP address
 	mtu 	 ; Maximum transfer unit
 	cmd 	 ; Command
}






PRIM 	IPA_CONFIG_CNF 	0x8002403C
{
 	ack_flag 	 ; Acknowledge flag
 	all_down 	 ; all interfaces down flag
}