patch-2.3.99-pre7 linux/drivers/char/rio/list.h

• Lines: 197
• Date: Wed May 10 16:56:43 2000
• Orig file: v2.3.99-pre6/linux/drivers/char/rio/list.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.99-pre6/linux/drivers/char/rio/list.h linux/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 ***********/