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/****************************************************************************
******* *******
******* L I S T *******
******* *******
****************************************************************************
Author : Jeremy Rolls.
Date : 04-Nov-1990
*
* (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Version : 0.01
Mods
----------------------------------------------------------------------------
Date By Description
----------------------------------------------------------------------------
***************************************************************************/
#ifndef _list_h
#define _list_h 1
#ifdef SCCS_LABELS
#ifndef lint
static char *_rio_list_h_sccs = "@(#)list.h 1.9";
#endif
#endif
#define PKT_IN_USE 0x1
#ifdef INKERNEL
#define ZERO_PTR (ushort) 0x8000
#define CaD PortP->Caddr
/*
** We can add another packet to a transmit queue if the packet pointer pointed
** to by the TxAdd pointer has PKT_IN_USE clear in its address.
*/
#ifndef linux
#if defined( MIPS ) && !defined( MIPSEISA )
/* May the shoes of the Devil dance on your grave for creating this */
#define can_add_transmit(PacketP,PortP) \
(!((uint)(PacketP = (struct PKT *)RIO_PTR(CaD,RINDW(PortP->TxAdd))) \
& (PKT_IN_USE<<2)))
#elif defined(MIPSEISA) || defined(nx6000) || \
defined(drs6000) || defined(UWsparc)
#define can_add_transmit(PacketP,PortP) \
(!((uint)(PacketP = (struct PKT *)RIO_PTR(CaD,RINDW(PortP->TxAdd))) \
& PKT_IN_USE))
#else
#define can_add_transmit(PacketP,PortP) \
(!((uint)(PacketP = (struct PKT *)RIO_PTR(CaD,*PortP->TxAdd)) \
& PKT_IN_USE))
#endif
/*
** To add a packet to the queue, you set the PKT_IN_USE bit in the address,
** and then move the TxAdd pointer along one position to point to the next
** packet pointer. You must wrap the pointer from the end back to the start.
*/
#if defined(MIPS) || defined(nx6000) || defined(drs6000) || defined(UWsparc)
# define add_transmit(PortP) \
WINDW(PortP->TxAdd,RINDW(PortP->TxAdd) | PKT_IN_USE);\
if (PortP->TxAdd == PortP->TxEnd)\
PortP->TxAdd = PortP->TxStart;\
else\
PortP->TxAdd++;\
WWORD(PortP->PhbP->tx_add , RIO_OFF(CaD,PortP->TxAdd));
#elif defined(AIX)
# define add_transmit(PortP) \
{\
register ushort *TxAddP = (ushort *)RIO_PTR(Cad,PortP->TxAddO);\
WINDW( TxAddP, RINDW( TxAddP ) | PKT_IN_USE );\
if (PortP->TxAddO == PortP->TxEndO )\
PortP->TxAddO = PortP->TxStartO;\
else\
PortP->TxAddO += sizeof(ushort);\
WWORD(((PHB *)RIO_PTR(Cad,PortP->PhbO))->tx_add , PortP->TxAddO );\
}
#else
# define add_transmit(PortP) \
*PortP->TxAdd |= PKT_IN_USE;\
if (PortP->TxAdd == PortP->TxEnd)\
PortP->TxAdd = PortP->TxStart;\
else\
PortP->TxAdd++;\
PortP->PhbP->tx_add = RIO_OFF(CaD,PortP->TxAdd);
#endif
/*
** can_remove_receive( PacketP, PortP ) returns non-zero if PKT_IN_USE is set
** for the next packet on the queue. It will also set PacketP to point to the
** relevant packet, [having cleared the PKT_IN_USE bit]. If PKT_IN_USE is clear,
** then can_remove_receive() returns 0.
*/
#if defined(MIPS) || defined(nx6000) || defined(drs6000) || defined(UWsparc)
# define can_remove_receive(PacketP,PortP) \
((RINDW(PortP->RxRemove) & PKT_IN_USE) ? \
(PacketP=(struct PKT *)RIO_PTR(CaD,(RINDW(PortP->RxRemove) & ~PKT_IN_USE))):0)
#elif defined(AIX)
# define can_remove_receive(PacketP,PortP) \
((RINDW((ushort *)RIO_PTR(Cad,PortP->RxRemoveO)) & PKT_IN_USE) ? \
(PacketP=(struct PKT *)RIO_PTR(Cad,RINDW((ushort *)RIO_PTR(Cad,PortP->RxRemoveO)) & ~PKT_IN_USE)):0)
#else
# define can_remove_receive(PacketP,PortP) \
((*PortP->RxRemove & PKT_IN_USE) ? \
(PacketP=(struct PKT *)RIO_PTR(CaD,(*PortP->RxRemove & ~PKT_IN_USE))):0)
#endif
/*
** Will God see it within his heart to forgive us for this thing that
** we have created? To remove a packet from the receive queue you clear
** its PKT_IN_USE bit, and then bump the pointers. Once the pointers
** get to the end, they must be wrapped back to the start.
*/
#if defined(MIPS) || defined(nx6000) || defined(drs6000) || defined(UWsparc)
# define remove_receive(PortP) \
WINDW(PortP->RxRemove, (RINDW(PortP->RxRemove) & ~PKT_IN_USE));\
if (PortP->RxRemove == PortP->RxEnd)\
PortP->RxRemove = PortP->RxStart;\
else\
PortP->RxRemove++;\
WWORD(PortP->PhbP->rx_remove , RIO_OFF(CaD,PortP->RxRemove));
#elif defined(AIX)
# define remove_receive(PortP) \
{\
register ushort *RxRemoveP = (ushort *)RIO_PTR(Cad,PortP->RxRemoveO);\
WINDW( RxRemoveP, RINDW( RxRemoveP ) & ~PKT_IN_USE );\
if (PortP->RxRemoveO == PortP->RxEndO)\
PortP->RxRemoveO = PortP->RxStartO;\
else\
PortP->RxRemoveO += sizeof(ushort);\
WWORD(((PHB *)RIO_PTR(Cad,PortP->PhbO))->rx_remove, PortP->RxRemoveO );\
}
#else
# define remove_receive(PortP) \
*PortP->RxRemove &= ~PKT_IN_USE;\
if (PortP->RxRemove == PortP->RxEnd)\
PortP->RxRemove = PortP->RxStart;\
else\
PortP->RxRemove++;\
PortP->PhbP->rx_remove = RIO_OFF(CaD,PortP->RxRemove);
#endif
#endif
#else /* !IN_KERNEL */
#define ZERO_PTR NULL
#ifdef HOST
/* #define can_remove_transmit(pkt,phb) ((((char*)pkt = (*(char**)(phb->tx_remove))-1) || 1)) && (*phb->u3.s2.tx_remove_ptr & PKT_IN_USE)) */
#define remove_transmit(phb) *phb->u3.s2.tx_remove_ptr &= ~(ushort)PKT_IN_USE;\
if (phb->tx_remove == phb->tx_end)\
phb->tx_remove = phb->tx_start;\
else\
phb->tx_remove++;
#define can_add_receive(phb) !(*phb->u4.s2.rx_add_ptr & PKT_IN_USE)
#define add_receive(pkt,phb) *phb->rx_add = pkt;\
*phb->u4.s2.rx_add_ptr |= PKT_IN_USE;\
if (phb->rx_add == phb->rx_end)\
phb->rx_add = phb->rx_start;\
else\
phb->rx_add++;
#endif
#endif
#ifdef RTA
#define splx(oldspl) if ((oldspl) == 0) spl0()
#endif
#endif /* ifndef _list.h */
/*********** end of file ***********/
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