| /**************************************************************************** |
| ******* ******* |
| ******* 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 ***********/ |
