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