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Diffstat (limited to 'sim/ppc/hw_disk.c')
-rw-r--r-- | sim/ppc/hw_disk.c | 255 |
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_ */ |