list.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:7k
- /****************************************************************************
- ******* *******
- ******* 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
- ** relevent 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 ***********/