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/* |
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* Copyright (C) 2003-2007 Anders Gavare. 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 are met: |
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* |
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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. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 THE AUTHOR 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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* |
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* $Id: dev_colorplanemask.c,v 1.14 2007/06/15 18:44:19 debug Exp $ |
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* |
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* COMMENT: Color plane mask, used in the DECstation 3100 machine |
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* |
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* Just a one-byte thingy, but the way things work now this has to |
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* be a separate device. :-/ |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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|
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#include "devices.h" |
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#include "memory.h" |
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#include "misc.h" |
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|
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|
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struct colorplanemask_data { |
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unsigned char *color_plane_mask; |
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}; |
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|
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|
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DEVICE_ACCESS(colorplanemask) |
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{ |
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struct colorplanemask_data *d = extra; |
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|
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switch (relative_addr) { |
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|
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case 0x00: |
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if (writeflag == MEM_WRITE) { |
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*d->color_plane_mask = data[0]; |
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} else { |
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debug("[ colorplanemask: read isn't actually " |
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"supported ]\n"); |
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data[0] = *d->color_plane_mask; |
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} |
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break; |
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|
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default: |
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if (writeflag == MEM_WRITE) { |
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debug("[ colorplanemask: unimplemented write " |
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"to address 0x%x, data=0x%02x ]\n", |
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(int)relative_addr, data[0]); |
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} else { |
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debug("[ colorplanemask: unimplemented read " |
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"from address 0x%x ]\n", (int)relative_addr); |
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} |
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} |
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|
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/* Pretend it was ok: */ |
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return 1; |
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} |
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|
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|
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/* |
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* dev_colorplanemask_init(): |
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*/ |
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void dev_colorplanemask_init(struct memory *mem, uint64_t baseaddr, |
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unsigned char *color_plane_mask) |
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{ |
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struct colorplanemask_data *d; |
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|
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CHECK_ALLOCATION(d = malloc(sizeof(struct colorplanemask_data))); |
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memset(d, 0, sizeof(struct colorplanemask_data)); |
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|
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d->color_plane_mask = color_plane_mask; |
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|
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memory_device_register(mem, "colorplanemask", baseaddr, |
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DEV_COLORPLANEMASK_LENGTH, dev_colorplanemask_access, |
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(void *)d, DM_DEFAULT, NULL); |
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} |
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