dev_fdc.cc Source File

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dev_fdc.cc
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1 /*
2  * Copyright (C) 2003-2009 Anders Gavare. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are met:
6  *
7  * 1. Redistributions of source code must retain the above copyright
8  * notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  * notice, this list of conditions and the following disclaimer in the
11  * documentation and/or other materials provided with the distribution.
12  * 3. The name of the author may not be used to endorse or promote products
13  * derived from this software without specific prior written permission.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  *
27  *
28  * COMMENT: PC-style floppy controller
29  *
30  * TODO! (This is just a dummy skeleton right now.)
31  *
32  * TODO 2: Make it work nicely with both ARC and PC emulation.
33  *
34  * See http://members.tripod.com/~oldboard/assembly/765.html for a
35  * quick overview.
36  */
37 
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41 
42 #include "device.h"
43 #include "interrupt.h"
44 #include "machine.h"
45 #include "memory.h"
46 #include "misc.h"
47 
48 
49 #define DEV_FDC_LENGTH 6 /* TODO 8, but collision with wdc */
50 
51 
52 struct fdc_data {
53  uint8_t reg[DEV_FDC_LENGTH];
54  struct interrupt irq;
55 };
56 
57 
59 {
60  struct fdc_data *d = (struct fdc_data *) extra;
61  uint64_t idata = 0, odata = 0;
62  size_t i;
63 
64  if (writeflag == MEM_WRITE)
65  idata = memory_readmax64(cpu, data, len);
66 
67  switch (relative_addr) {
68  case 0x04:
69  break;
70  default:if (writeflag==MEM_READ) {
71  fatal("[ fdc: read from reg %i ]\n",
72  (int)relative_addr);
73  odata = d->reg[relative_addr];
74  } else {
75  fatal("[ fdc: write to reg %i:", (int)relative_addr);
76  for (i=0; i<len; i++)
77  fatal(" %02x", data[i]);
78  fatal(" ]\n");
79  d->reg[relative_addr] = idata;
80  }
81  }
82 
83  if (writeflag == MEM_READ)
84  memory_writemax64(cpu, data, len, odata);
85 
86  return 1;
87 }
88 
89 
90 DEVINIT(fdc)
91 {
92  struct fdc_data *d;
93 
94  CHECK_ALLOCATION(d = (struct fdc_data *) malloc(sizeof(struct fdc_data)));
95  memset(d, 0, sizeof(struct fdc_data));
96 
98 
100  devinit->addr, DEV_FDC_LENGTH, dev_fdc_access, d,
101  DM_DEFAULT, NULL);
102 
103  return 1;
104 }
105 
data
u_short data
Definition: siireg.h:79
fdc_data
Definition: dev_fdc.cc:52
INTERRUPT_CONNECT
#define INTERRUPT_CONNECT(name, istruct)
Definition: interrupt.h:77
fdc_data::irq
struct interrupt irq
Definition: dev_fdc.cc:54
DEV_FDC_LENGTH
#define DEV_FDC_LENGTH
Definition: dev_fdc.cc:49
devinit::addr
uint64_t addr
Definition: device.h:46
memory_device_register
void memory_device_register(struct memory *mem, const char *, uint64_t baseaddr, uint64_t len, int(*f)(struct cpu *, struct memory *, uint64_t, unsigned char *, size_t, int, void *), void *extra, int flags, unsigned char *dyntrans_data)
Definition: memory.cc:339
MEM_READ
#define MEM_READ
Definition: memory.h:116
DM_DEFAULT
#define DM_DEFAULT
Definition: memory.h:130
devinit::machine
struct machine * machine
Definition: device.h:41
device.h
DEVICE_ACCESS
DEVICE_ACCESS(fdc)
Definition: dev_fdc.cc:58
MEM_WRITE
#define MEM_WRITE
Definition: memory.h:117
DEVINIT
DEVINIT(fdc)
Definition: dev_fdc.cc:90
devinit::interrupt_path
char * interrupt_path
Definition: device.h:50
interrupt.h
fatal
void fatal(const char *fmt,...)
Definition: main.cc:152
fdc_data::reg
uint8_t reg[DEV_FDC_LENGTH]
Definition: dev_fdc.cc:53
misc.h
memory_readmax64
uint64_t memory_readmax64(struct cpu *cpu, unsigned char *buf, int len)
Definition: memory.cc:55
machine.h
devinit::name
char * name
Definition: device.h:43
devinit
Definition: device.h:40
machine::memory
struct memory * memory
Definition: machine.h:126
interrupt
Definition: interrupt.h:36
memory_writemax64
void memory_writemax64(struct cpu *cpu, unsigned char *buf, int len, uint64_t data)
Definition: memory.cc:89
cpu
Definition: cpu.h:326
memory.h
CHECK_ALLOCATION
#define CHECK_ALLOCATION(ptr)
Definition: misc.h:239

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