a07736d0f6
active memory maps. This removes the need to change the memory map from common to attribute every time a packet is sent/received. This increases performance and decreases cpu load (ping times on slow machines improve by about 1.5ms). Move out the old common memory/attrbiute memory hack functions to a new header file to tidy up the main code. I want to keep them available for a while.
137 lines
4.9 KiB
C
137 lines
4.9 KiB
C
/*
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* Copyright (C) 2000
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* Dr. Duncan McLennan Barclay, dmlb@ragnet.demon.co.uk.
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY DUNCAN BARCLAY AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL DUNCAN BARCLAY OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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*/
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/*
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* Hacks for working around the PCCard layer problems in NEWBUS kludge
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* and OLDCARD.
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*
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* Now that /sys/pccard/pcic.c can support multiple memory maps per
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* slot correctly this is historical code. It is being left in the tree
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* for a short while until interactions between OLDCARD and pccardd
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* are ironed out. The common and attribute memory is now always
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* mapped in. dmlb 17/1/01
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*
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* The driver assumes that the common memory is always mapped in,
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* for the moment we ensure this with the following macro at the
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* head of each function and by using functions to access attribute
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* memory. Hysterical raisins led to the non-"reflexive" approach.
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* Roll on NEWCARD and it can all die...
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*
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* We call the pccard layer to change and restore the mapping each
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* time we use the attribute memory.
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*
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* These could become marcos around bus_activate_resource, but
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* the functions do made hacking them around safer.
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*/
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#if RAY_NEED_CM_REMAPPING
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#define RAY_MAP_CM(sc) ray_attr_mapcm(sc)
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#else
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#define RAY_MAP_CM(sc)
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#endif /* RAY_NEED_CM_REMAPPING */
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#if RAY_NEED_AM_REMAPPING
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static __inline void ray_attr_mapam (struct ray_softc *sc);
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static __inline u_int8_t ray_attr_read_1 (struct ray_softc *sc, off_t offset);
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static __inline void ray_attr_write_1 (struct ray_softc *sc, off_t offset, u_int8_t byte);
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#undef ATTR_READ_1
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#define ATTR_READ_1(sc, off) ray_attr_read_1((sc), (off))
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#undef ATTR_WRITE_1
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#define ATTR_WRITE_1(sc, off, val) ray_attr_write_1((sc), (off), (val))
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#endif /* RAY_NEED_AM_REMAPPING */
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#if (RAY_NEED_AM_REMAPPING || RAY_NEED_CM_REMAPPING)
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static __inline void ray_attr_mapcm (struct ray_softc *sc);
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#endif /* (RAY_NEED_AM_REMAPPING || RAY_NEED_CM_REMAPPING) */
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#if (RAY_NEED_AM_REMAPPING || RAY_NEED_CM_REMAPPING)
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static __inline void
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ray_attr_mapcm(struct ray_softc *sc)
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{
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bus_activate_resource(sc->dev, SYS_RES_MEMORY, sc->cm_rid, sc->cm_res);
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#if RAY_DEBUG & RAY_DBG_CM
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{
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u_long flags = 0xffff;
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CARD_GET_RES_FLAGS(device_get_parent(sc->dev), sc->dev,
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SYS_RES_MEMORY, sc->cm_rid, &flags);
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RAY_PRINTF(sc, "common memory\n"
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". start 0x%0lx count 0x%0lx flags 0x%0lx",
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bus_get_resource_start(sc->dev, SYS_RES_MEMORY, sc->cm_rid),
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bus_get_resource_count(sc->dev, SYS_RES_MEMORY, sc->cm_rid),
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flags);
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}
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#endif /* RAY_DEBUG & RAY_DBG_CM */
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}
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#endif /* (RAY_NEED_AM_REMAPPING || RAY_NEED_CM_REMAPPING) */
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#if RAY_NEED_AM_REMAPPING
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static __inline void
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ray_attr_mapam(struct ray_softc *sc)
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{
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bus_activate_resource(sc->dev, SYS_RES_MEMORY, sc->am_rid, sc->am_res);
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#if RAY_DEBUG & RAY_DBG_CM
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{
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u_long flags = 0xffff;
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CARD_GET_RES_FLAGS(device_get_parent(sc->dev), sc->dev,
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SYS_RES_MEMORY, sc->am_rid, &flags);
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RAY_PRINTF(sc, "attribute memory\n"
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". start 0x%0lx count 0x%0lx flags 0x%0lx",
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bus_get_resource_start(sc->dev, SYS_RES_MEMORY, sc->am_rid),
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bus_get_resource_count(sc->dev, SYS_RES_MEMORY, sc->am_rid),
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flags);
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}
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#endif /* RAY_DEBUG & RAY_DBG_CM */
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}
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static __inline u_int8_t
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ray_attr_read_1(struct ray_softc *sc, off_t offset)
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{
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u_int8_t byte;
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ray_attr_mapam(sc);
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byte = (u_int8_t)bus_space_read_1(sc->am_bst, sc->am_bsh, offset);
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ray_attr_mapcm(sc);
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return (byte);
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}
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static __inline void
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ray_attr_write_1(struct ray_softc *sc, off_t offset, u_int8_t byte)
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{
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ray_attr_mapam(sc);
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bus_space_write_1(sc->am_bst, sc->am_bsh, offset, byte);
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ray_attr_mapcm(sc);
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}
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#endif /* RAY_NEED_AM_REMAPPING */
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