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/* |
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* Copyright (C) 2005-2007 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_disk.c,v 1.15 2007/06/15 18:44:19 debug Exp $ |
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* |
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* COMMENT: A simple disk controller device, for the test machines |
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* |
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* Basic "disk" device. This is a simple test device which can be used to |
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* read and write data from disk devices. |
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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 "cpu.h" |
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#include "device.h" |
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#include "diskimage.h" |
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#include "emul.h" |
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#include "machine.h" |
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#include "memory.h" |
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#include "misc.h" |
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|
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#include "testmachine/dev_disk.h" |
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|
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|
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struct disk_data { |
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int64_t offset; |
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int disk_id; |
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int command; |
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int status; |
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unsigned char *buf; |
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}; |
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|
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|
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DEVICE_ACCESS(disk_buf) |
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{ |
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struct disk_data *d = extra; |
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|
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if (writeflag == MEM_WRITE) |
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memcpy(d->buf + relative_addr, data, len); |
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else |
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memcpy(data, d->buf + relative_addr, len); |
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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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DEVICE_ACCESS(disk) |
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{ |
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struct disk_data *d = extra; |
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uint64_t idata = 0, odata = 0; |
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|
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if (writeflag == MEM_WRITE) |
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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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|
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case DEV_DISK_OFFSET: |
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if (writeflag == MEM_READ) { |
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odata = d->offset; |
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} else { |
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d->offset = idata; |
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} |
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break; |
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|
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case DEV_DISK_ID: |
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if (writeflag == MEM_READ) { |
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odata = d->disk_id; |
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} else { |
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d->disk_id = idata; |
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} |
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break; |
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|
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case DEV_DISK_START_OPERATION: |
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if (writeflag == MEM_READ) { |
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odata = d->command; |
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} else { |
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d->command = idata; |
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switch (d->command) { |
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case 0: d->status = diskimage_access(cpu->machine, |
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d->disk_id, DISKIMAGE_IDE, 0, |
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d->offset, d->buf, 512); |
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break; |
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case 1: d->status = diskimage_access(cpu->machine, |
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d->disk_id, DISKIMAGE_IDE, 1, |
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d->offset, d->buf, 512); |
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break; |
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} |
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} |
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break; |
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|
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case DEV_DISK_STATUS: |
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if (writeflag == MEM_READ) { |
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odata = d->status; |
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} else { |
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d->status = idata; |
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} |
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break; |
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|
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default:if (writeflag == MEM_WRITE) { |
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fatal("[ disk: unimplemented write to " |
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"offset 0x%x: data=0x%x ]\n", (int) |
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relative_addr, (int)idata); |
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} else { |
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fatal("[ disk: unimplemented read from " |
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"offset 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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DEVINIT(disk) |
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{ |
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struct disk_data *d; |
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size_t nlen; |
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char *n1, *n2; |
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|
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CHECK_ALLOCATION(d = malloc(sizeof(struct disk_data))); |
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memset(d, 0, sizeof(struct disk_data)); |
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|
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nlen = strlen(devinit->name) + 30; |
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CHECK_ALLOCATION(n1 = malloc(nlen)); |
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CHECK_ALLOCATION(n2 = malloc(nlen)); |
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|
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CHECK_ALLOCATION(d->buf = malloc(devinit->machine->arch_pagesize)); |
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memset(d->buf, 0, devinit->machine->arch_pagesize); |
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|
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snprintf(n1, nlen, "%s [control]", devinit->name); |
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snprintf(n2, nlen, "%s [data buffer]", devinit->name); |
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|
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memory_device_register(devinit->machine->memory, n1, |
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devinit->addr, DEV_DISK_BUFFER, dev_disk_access, (void *)d, |
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DM_DEFAULT, NULL); |
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|
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memory_device_register(devinit->machine->memory, n2, |
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devinit->addr + DEV_DISK_BUFFER, |
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devinit->machine->arch_pagesize, dev_disk_buf_access, |
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(void *)d, DM_DYNTRANS_OK | DM_DYNTRANS_WRITE_OK | |
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DM_READS_HAVE_NO_SIDE_EFFECTS, d->buf); |
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|
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return 1; |
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} |
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