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/* |
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* Copyright (C) 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: device.c,v 1.16 2005/08/10 22:25:50 debug Exp $ |
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* |
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* Device registry framework. |
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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 "device.h" |
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#include "misc.h" |
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|
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|
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static struct device_entry *device_entries = NULL; |
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static int device_entries_sorted = 0; |
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static int n_device_entries = 0; |
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static int device_exit_on_error = 1; |
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|
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|
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/* |
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* device_entry_compar(): |
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* |
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* Internal function, used by sort_entries(). |
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*/ |
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static int device_entry_compar(const void *a, const void *b) |
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{ |
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struct device_entry *pa = (struct device_entry *) a; |
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struct device_entry *pb = (struct device_entry *) b; |
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|
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return strcmp(pa->name, pb->name); |
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} |
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|
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|
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/* |
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* sort_entries(): |
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* |
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* Internal function. Sorts the device_entries array in alphabetic order. |
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*/ |
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static void sort_entries(void) |
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{ |
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qsort(device_entries, n_device_entries, sizeof(struct device_entry), |
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device_entry_compar); |
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|
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device_entries_sorted = 1; |
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} |
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|
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|
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/* |
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* device_register(): |
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* |
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* Registers a device. The device is added to the end of the device_entries |
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* array, and the sorted flag is set to zero. |
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* |
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* NOTE: It would be a bad thing if two devices had the same name. However, |
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* that isn't checked here, it is up to the caller! |
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* |
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* Return value is 1 if the device was registered, 0 otherwise. |
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*/ |
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int device_register(char *name, int (*initf)(struct devinit *)) |
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{ |
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device_entries = realloc(device_entries, sizeof(struct device_entry) |
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* (n_device_entries + 1)); |
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if (device_entries == NULL) { |
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fprintf(stderr, "device_register(): out of memory\n"); |
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exit(1); |
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} |
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|
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memset(&device_entries[n_device_entries], 0, |
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sizeof(struct device_entry)); |
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|
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device_entries[n_device_entries].name = strdup(name); |
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device_entries[n_device_entries].initf = initf; |
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|
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device_entries_sorted = 0; |
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n_device_entries ++; |
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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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* device_lookup(): |
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* |
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* Lookup a device name by scanning the device_entries array (as a binary |
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* search tree). |
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* |
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* Return value is a pointer to the device_entry on success, or a NULL pointer |
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* if there was no such device. |
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*/ |
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struct device_entry *device_lookup(char *name) |
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{ |
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int i, step, r, do_return = 0; |
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|
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if (name == NULL) { |
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fprintf(stderr, "device_lookup(): NULL ptr\n"); |
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exit(1); |
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} |
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|
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if (!device_entries_sorted) |
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sort_entries(); |
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|
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if (n_device_entries == 0) |
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return NULL; |
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|
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i = n_device_entries / 2; |
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step = i/2 + 1; |
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|
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for (;;) { |
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if (i < 0) |
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i = 0; |
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if (i >= n_device_entries) |
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i = n_device_entries - 1; |
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|
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/* printf("device_lookup(): i=%i step=%i\n", i, step); |
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printf(" name='%s', '%s'\n", name, |
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device_entries[i].name); */ |
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|
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r = strcmp(name, device_entries[i].name); |
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|
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if (r < 0) { |
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/* Go left: */ |
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i -= step; |
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if (step == 0) |
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i --; |
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} else if (r > 0) { |
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/* Go right: */ |
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i += step; |
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if (step == 0) |
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i ++; |
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} else { |
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/* Found it! */ |
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return &device_entries[i]; |
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} |
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|
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if (do_return) |
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return NULL; |
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|
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if (step == 0) |
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do_return = 1; |
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|
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if (step & 1) |
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step = (step/2) + 1; |
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else |
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step /= 2; |
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} |
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} |
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|
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|
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/* |
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* device_unregister(): |
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* |
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* Unregisters a device. |
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* |
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* Return value is 1 if a device was unregistered, 0 otherwise. |
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*/ |
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int device_unregister(char *name) |
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{ |
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ssize_t i; |
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struct device_entry *p = device_lookup(name); |
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|
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if (p == NULL) { |
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fatal("device_unregister(): no such device (\"%s\")\n", name); |
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return 0; |
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} |
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|
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i = (size_t)p - (size_t)device_entries; |
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i /= sizeof(struct device_entry); |
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|
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free(device_entries[i].name); |
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device_entries[i].name = NULL; |
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|
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if (i == n_device_entries-1) { |
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/* Do nothing if we're removing the last array element. */ |
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} else { |
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/* Remove array element i by copying the last element |
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to i's position: */ |
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device_entries[i] = device_entries[n_device_entries-1]; |
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|
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/* The array is not sorted anymore: */ |
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device_entries_sorted = 0; |
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} |
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|
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n_device_entries --; |
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|
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/* TODO: realloc? */ |
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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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* device_add(): |
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* |
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* Add a device to a machine. For example: "kn210 addr=0x12340000" adds a |
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* device called "kn210" at a specific address. |
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* |
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* TODO: This function is quite ugly, and should be cleaned up. |
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*/ |
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void *device_add(struct machine *machine, char *name_and_params) |
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{ |
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struct device_entry *p; |
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struct devinit devinit; |
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char *s2, *s3; |
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size_t len; |
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|
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memset(&devinit, 0, sizeof(struct devinit)); |
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devinit.machine = machine; |
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|
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/* Default values: */ |
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devinit.addr_mult = 1; |
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devinit.in_use = 1; |
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|
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/* Get the device name first: */ |
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s2 = name_and_params; |
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while (s2[0] != ',' && s2[0] != ' ' && s2[0] != '\0') |
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s2 ++; |
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|
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len = (size_t)s2 - (size_t)name_and_params; |
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devinit.name = malloc(len + 1); |
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if (devinit.name == NULL) { |
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fprintf(stderr, "device_add(): out of memory\n"); |
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exit(1); |
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} |
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memcpy(devinit.name, name_and_params, len); |
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devinit.name[len] = '\0'; |
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|
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p = device_lookup(devinit.name); |
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if (p == NULL) { |
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fatal("no such device (\"%s\")\n", devinit.name); |
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if (device_exit_on_error) |
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exit(1); |
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else |
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goto return_fail; |
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} |
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|
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/* Get params from name_and_params: */ |
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while (*s2 != '\0') { |
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/* Skip spaces, commas, and semicolons: */ |
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while (*s2 == ' ' || *s2 == ',' || *s2 == ';') |
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s2 ++; |
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|
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if (*s2 == '\0') |
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break; |
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|
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/* s2 now points to the next param. eg "addr=1234" */ |
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|
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/* Get a word (until there is a '=' sign): */ |
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s3 = s2; |
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while (*s3 != '=' && *s3 != '\0') |
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s3 ++; |
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if (s3 == s2) { |
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fatal("weird param: %s\n", s2); |
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if (device_exit_on_error) |
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exit(1); |
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else |
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goto return_fail; |
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} |
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s3 ++; |
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/* s3 now points to the parameter value ("1234") */ |
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|
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if (strncmp(s2, "addr=", 5) == 0) { |
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devinit.addr = mystrtoull(s3, NULL, 0); |
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} else if (strncmp(s2, "len=", 4) == 0) { |
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devinit.len = mystrtoull(s3, NULL, 0); |
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} else if (strncmp(s2, "addr_mult=", 10) == 0) { |
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devinit.addr_mult = mystrtoull(s3, NULL, 0); |
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} else if (strncmp(s2, "irq=", 4) == 0) { |
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devinit.irq_nr = mystrtoull(s3, NULL, 0); |
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} else if (strncmp(s2, "in_use=", 7) == 0) { |
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devinit.in_use = mystrtoull(s3, NULL, 0); |
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} else if (strncmp(s2, "name2=", 6) == 0) { |
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char *h = s2 + 6; |
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size_t len = 0; |
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while (*h && *h != ' ') |
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h++, len++; |
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devinit.name2 = malloc(len + 1); |
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if (devinit.name2 == 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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snprintf(devinit.name2, len + 1, s2 + 6); |
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} else { |
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fatal("unknown param: %s\n", s2); |
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if (device_exit_on_error) |
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exit(1); |
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else |
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goto return_fail; |
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} |
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|
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/* skip to the next param: */ |
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s2 = s3; |
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while (*s2 != '\0' && *s2 != ' ' && *s2 != ',' && *s2 != ';') |
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s2 ++; |
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} |
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|
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|
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/* |
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* Call the init function for this device: |
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*/ |
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|
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devinit.return_ptr = NULL; |
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|
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if (!p->initf(&devinit)) { |
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fatal("error adding device (\"%s\")\n", name_and_params); |
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if (device_exit_on_error) |
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exit(1); |
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else |
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goto return_fail; |
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} |
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|
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free(devinit.name); |
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return devinit.return_ptr; |
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|
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return_fail: |
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free(devinit.name); |
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return NULL; |
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} |
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|
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|
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/* |
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* device_dumplist(): |
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* |
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* Dump a list of all registered devices. (If the list is not sorted when |
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* this function is called, it is implicitly sorted.) |
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*/ |
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void device_dumplist(void) |
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{ |
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int i; |
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|
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if (!device_entries_sorted) |
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sort_entries(); |
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|
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for (i=0; i<n_device_entries; i++) { |
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debug(" %s", device_entries[i].name); |
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|
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/* TODO: flags? */ |
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|
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debug("\n"); |
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} |
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} |
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|
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|
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/* |
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* device_set_exit_on_error(): |
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* |
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* This function selects the behaviour of the emulator when a device is not |
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* found. During startup, it is nicest to abort the whole emulator session, |
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* but if a device addition is attempted from within the debugger, then it is |
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* nicer to just print a warning and continue. |
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*/ |
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void device_set_exit_on_error(int exit_on_error) |
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{ |
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device_exit_on_error = exit_on_error; |
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} |
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|
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|
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/* |
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* device_init(): |
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* |
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* Initialize the device registry, and call autodev_init() to automatically |
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* add all normal devices (from the src/devices/ directory). |
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* |
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* This function should be called before any other device_*() function is used. |
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*/ |
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void device_init(void) |
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{ |
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device_entries = NULL; |
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device_entries_sorted = 0; |
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n_device_entries = 0; |
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|
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autodev_init(); |
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} |
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