/**************************************************************************** ******* ******* ******* 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 ***********/