1 /*
2 * Copyright (C) 2018-2020 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: VoCore Palmbus
29 *
30 * TODO
31 */
32
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36
37 #include "cpu.h"
38 #include "console.h"
39 #include "device.h"
40 #include "emul.h"
41 #include "machine.h"
42 #include "memory.h"
43 #include "misc.h"
44
45
46 #define DEV_PALMBUS_LENGTH 0x1000
47
48 struct palmbus_data {
49 // struct interrupt irq;
50 int console_handle;
51 };
52
53
DEVICE_ACCESS(palmbus)54 DEVICE_ACCESS(palmbus)
55 {
56 struct palmbus_data *d = (struct palmbus_data *) extra;
57 uint64_t idata = 0, odata = 0;
58
59 if (writeflag == MEM_WRITE)
60 idata = memory_readmax64(cpu, data, len);
61
62 switch (relative_addr) {
63
64 case 0x0000:
65 odata = 0x30335452;
66 break;
67
68 case 0x0004:
69 odata = 0x20203235;
70 break;
71
72 case 0x000c:
73 /* Linux boot message says "SoC Type: Ralink RT5350 id:1 rev:3" */
74 odata = 0x00000103;
75 break;
76
77 case 0x0c04:
78 console_putchar(d->console_handle, idata);
79 break;
80
81 case 0x0c1c:
82 odata = 0x20; // Serial ready (?)
83 break;
84
85 default:
86 if (writeflag == MEM_WRITE) {
87 fatal("[ palmbus: unimplemented write to address 0x%x"
88 ", data=0x%02x ]\n",
89 (int)relative_addr, (int)idata);
90 } else {
91 fatal("[ palmbus: unimplemented read from address 0x%x "
92 "]\n", (int)relative_addr);
93 }
94 /* exit(1); */
95 }
96
97 if (writeflag == MEM_READ)
98 memory_writemax64(cpu, data, len, odata);
99
100 return 1;
101 }
102
103
DEVINIT(palmbus)104 DEVINIT(palmbus)
105 {
106 struct palmbus_data *d;
107
108 CHECK_ALLOCATION(d = (struct palmbus_data *) malloc(sizeof(struct palmbus_data)));
109 memset(d, 0, sizeof(struct palmbus_data));
110
111 // INTERRUPT_CONNECT(devinit->interrupt_path, d->irq);
112
113 d->console_handle = console_start_slave(devinit->machine, "uartlite", 1);
114
115 memory_device_register(devinit->machine->memory, devinit->name,
116 devinit->addr, DEV_PALMBUS_LENGTH,
117 dev_palmbus_access, (void *)d, DM_DEFAULT, NULL);
118
119 return 1;
120 }
121
122