aboutsummaryrefslogtreecommitdiff
path: root/sim/ppc/hw_disk.c
diff options
context:
space:
mode:
Diffstat (limited to 'sim/ppc/hw_disk.c')
-rw-r--r--sim/ppc/hw_disk.c255
1 files changed, 0 insertions, 255 deletions
diff --git a/sim/ppc/hw_disk.c b/sim/ppc/hw_disk.c
deleted file mode 100644
index eb4d236..0000000
--- a/sim/ppc/hw_disk.c
+++ /dev/null
@@ -1,255 +0,0 @@
-/* This file is part of the program psim.
-
- Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- */
-
-
-#ifndef _HW_DISK_C_
-#define _HW_DISK_C_
-
-#include "device_table.h"
-
-#include "pk.h"
-
-#include <stdio.h>
-
-
-/* DEVICE
-
- cdrom - readable block device
-
- disk - readable block device that should be writeable
-
- floppy - readable block device that should be writeable
-
- DESCRIPTION
-
- Block I/O devices that model the behavour of a fixed or removable
- disk device.
-
- Creating an instance of this device with no arguments will provide
- access to primative read/write operators. If arguments are
- specified then the disk-label package is used to perform abstract
- disk I/O. The disk-label package will then use this devices
- primatives.
-
- For hardware I/O, this device would normally be attached to a
- parent `bus' and that bus would use the I/O methods to read and
- write raw data. The bus might actually be a SCSI or IDE device.
- It is assumed that the parent bus can take care of DMA.
-
- PROPERTIES
-
- reg = <address> (required)
-
- <address> is parent bus dependant.
-
- device_type = "block"
-
- name = "disk" | "cdrom" | "fd"
-
- file = <file-name> (required)
-
- The name of the file that contains the disk image.
-
- */
-
-typedef struct _hw_disk_device {
- const char *name;
- int read_only;
- unsigned_word size;
- FILE *image;
-} hw_disk_device;
-
-typedef struct _hw_disk_instance {
- long pos;
- hw_disk_device *disk;
-} hw_disk_instance;
-
-
-static void
-hw_disk_init_address(device *me)
-{
- hw_disk_device *disk = device_data(me);
- generic_device_init_address(me);
- if (disk->image != NULL)
- fclose(disk->image);
- disk->name = device_find_string_property(me, "file");
- if (strcmp(device_name(me), "disk") == 0) {
- disk->read_only = 0;
- disk->image = fopen(disk->name, "r+");
- }
- else {
- disk->read_only = 1;
- disk->image = fopen(disk->name, "r");
- }
- if (disk->image == NULL) {
- perror(device_name(me));
- device_error(me, "open %s failed\n", disk->name);
- }
-}
-
-static unsigned
-hw_disk_io_read_buffer(device *me,
- void *dest,
- int space,
- unsigned_word addr,
- unsigned nr_bytes,
- cpu *processor,
- unsigned_word cia)
-{
- hw_disk_device *disk = device_data(me);
- if (nr_bytes == 0)
- return 0;
- if (addr + nr_bytes > disk->size)
- return 0;
- if (fseek(disk->image, addr, SEEK_SET) < 0)
- return 0;
- if (fread(dest, nr_bytes, 1, disk->image) != 1)
- return 0;
- return nr_bytes;
-}
-
-
-static unsigned
-hw_disk_io_write_buffer(device *me,
- const void *source,
- int space,
- unsigned_word addr,
- unsigned nr_bytes,
- cpu *processor,
- unsigned_word cia)
-{
- hw_disk_device *disk = device_data(me);
- if (disk->read_only)
- return 0;
- if (nr_bytes == 0)
- return 0;
- if (addr + nr_bytes > disk->size)
- return 0;
- if (fseek(disk->image, addr, SEEK_SET) < 0)
- return 0;
- if (fwrite(source, nr_bytes, 1, disk->image) != 1)
- return 0;
- return nr_bytes;
-}
-
-
-/* instances of the hw_disk device */
-
-static void
-hw_disk_instance_delete(device_instance *instance)
-{
- hw_disk_instance *data = device_instance_data(instance);
- zfree(data);
-}
-
-static int
-hw_disk_instance_read(device_instance *instance,
- void *buf,
- unsigned_word len)
-{
- hw_disk_instance *data = device_instance_data(instance);
- if (fseek(data->disk->image, data->pos, SEEK_SET) < 0)
- return -1;
- if (fread(buf, len, 1, data->disk->image) != 1)
- return -1;
- data->pos = ftell(data->disk->image);
- return len;
-}
-
-static int
-hw_disk_instance_write(device_instance *instance,
- const void *buf,
- unsigned_word len)
-{
- hw_disk_instance *data = device_instance_data(instance);
- if (data->disk->read_only)
- return -1;
- if (fseek(data->disk->image, data->pos, SEEK_SET) < 0)
- return -1;
- if (fwrite(buf, len, 1, data->disk->image) != 1)
- return -1;
- data->pos = ftell(data->disk->image);
- return len;
-}
-
-static int
-hw_disk_instance_seek(device_instance *instance,
- unsigned_word pos_hi,
- unsigned_word pos_lo)
-{
- hw_disk_instance *data = device_instance_data(instance);
- data->pos = pos_lo;
- return 0;
-}
-
-static const device_instance_callbacks hw_disk_instance_callbacks = {
- hw_disk_instance_delete,
- hw_disk_instance_read,
- hw_disk_instance_write,
- hw_disk_instance_seek,
-};
-
-static device_instance *
-hw_disk_create_instance(device *me,
- const char *path,
- const char *args)
-{
- device_instance *disk_instance;
- hw_disk_device *disk = device_data(me);
- hw_disk_instance *data = ZALLOC(hw_disk_instance);
- data->disk = disk;
- data->pos = 0;
- disk_instance = device_create_instance_from(me, NULL,
- data,
- path, args,
- &hw_disk_instance_callbacks);
- return pk_disklabel_create_instance(disk_instance, args);
-}
-
-static device_callbacks const hw_disk_callbacks = {
- { hw_disk_init_address, NULL },
- { NULL, }, /* address */
- { hw_disk_io_read_buffer,
- hw_disk_io_write_buffer, },
- { NULL, }, /* DMA */
- { NULL, }, /* interrupt */
- { NULL, }, /* unit */
- hw_disk_create_instance,
-};
-
-
-static void *
-hw_disk_create(const char *name,
- const device_unit *unit_address,
- const char *args,
- device *parent)
-{
- /* create the descriptor */
- hw_disk_device *hw_disk = ZALLOC(hw_disk_device);
- return hw_disk;
-}
-
-
-const device_descriptor hw_disk_device_descriptor[] = {
- { "disk", hw_disk_create, &hw_disk_callbacks },
- { NULL },
-};
-
-#endif /* _HW_DISK_C_ */