diff options
Diffstat (limited to 'drivers/char/rio/list.h')
| -rw-r--r-- | drivers/char/rio/list.h | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/drivers/char/rio/list.h b/drivers/char/rio/list.h new file mode 100644 index 000000000..ae7368d0f --- /dev/null +++ b/drivers/char/rio/list.h @@ -0,0 +1,196 @@ +/**************************************************************************** + ******* ******* + ******* 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 ***********/ |