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/* |
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* Copyright (C) 2004-2005 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_sgi_ip20.c,v 1.10 2005/02/22 05:52:58 debug Exp $ |
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* |
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* SGI IP20 stuff. |
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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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extern int quiet_mode; |
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|
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|
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/* |
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* dev_sgi_ip20_access(): |
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*/ |
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int dev_sgi_ip20_access(struct cpu *cpu, struct memory *mem, |
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uint64_t relative_addr, unsigned char *data, size_t len, |
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int writeflag, void *extra) |
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{ |
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/* struct sgi_ip20_data *d = (struct sgi_ip20_data *) extra; */ |
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uint64_t idata = 0, odata = 0; |
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|
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idata = memory_readmax64(cpu, data, len); |
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|
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switch (relative_addr) { |
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case 0x38: |
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if (writeflag == MEM_WRITE) { |
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debug("[ sgi_ip20: write to address 0x%x, " |
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"data=0x%02x ]\n", (int)relative_addr, (int)idata); |
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} else { |
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/* |
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* TODO: |
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* |
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* I haven't had time to figure out what values should |
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* be returned by this device. Simple bit patterns |
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* don't seem to be enough, but using random() is |
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* obviously pretty bad. This must be fixed some day. |
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*/ |
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|
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/* instruction_trace = 1; quiet_mode = 0; */ |
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odata = random() & 0xff; |
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|
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debug("[ sgi_ip20: read from address 0x%x: 0x%x ]\n", |
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(int)relative_addr, (int)odata); |
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} |
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break; |
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default: |
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if (writeflag == MEM_WRITE) { |
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debug("[ sgi_ip20: unimplemented write to address " |
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"0x%x, data=0x%02x ]\n", (int)relative_addr, |
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(int)idata); |
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} else { |
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debug("[ sgi_ip20: unimplemented read from address " |
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"0x%x ]\n", (int)relative_addr); |
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} |
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} |
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|
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if (writeflag == MEM_READ) |
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memory_writemax64(cpu, data, len, odata); |
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|
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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_sgi_ip20_init(): |
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*/ |
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struct sgi_ip20_data *dev_sgi_ip20_init(struct cpu *cpu, struct memory *mem, |
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uint64_t baseaddr) |
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{ |
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struct sgi_ip20_data *d = malloc(sizeof(struct sgi_ip20_data)); |
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if (d == NULL) { |
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fprintf(stderr, "out of memory\n"); |
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exit(1); |
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} |
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memset(d, 0, sizeof(struct sgi_ip20_data)); |
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|
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/* |
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* This device is detected as int0 by NetBSD 2.0_BETA, so I call it |
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* "sgi_ip20_int". |
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*/ |
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memory_device_register(mem, "sgi_ip20_int", baseaddr, |
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DEV_SGI_IP20_LENGTH, dev_sgi_ip20_access, (void *)d, |
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MEM_DEFAULT, NULL); |
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|
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return d; |
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} |
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|