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/*
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/*
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 * Copyright (C) 2005 Martin Decky
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 * Copyright (C) 2005 Martin Decky
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 * All rights reserved.
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 * All rights reserved.
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 *
4
 *
5
 * Redistribution and use in source and binary forms, with or without
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
6
 * modification, are permitted provided that the following conditions
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 * are met:
7
 * are met:
8
 *
8
 *
9
 * - Redistributions of source code must retain the above copyright
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
15
 *   derived from this software without specific prior written permission.
16
 *
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
27
 */
28
 
28
 
29
#include "ofw.h"
29
#include "ofw.h"
30
#include <printf.h>
30
#include <printf.h>
31
#include <asm.h>
31
#include <asm.h>
32
 
32
 
33
#define MAX_OFW_ARGS        10
33
#define MAX_OFW_ARGS        10
34
 
34
 
35
/** OpenFirmware command structure
35
/** OpenFirmware command structure
36
 *
36
 *
37
 */
37
 */
38
typedef struct {
38
typedef struct {
39
    const char *service;          /**< Command name */
39
    const char *service;          /**< Command name */
40
    unsigned int nargs;           /**< Number of in arguments */
40
    unsigned long nargs;          /**< Number of in arguments */
41
    unsigned int nret;            /**< Number of out arguments */
41
    unsigned long nret;           /**< Number of out arguments */
42
    ofw_arg_t args[MAX_OFW_ARGS]; /**< List of arguments */
42
    ofw_arg_t args[MAX_OFW_ARGS]; /**< List of arguments */
43
} ofw_args_t;
43
} ofw_args_t;
44
 
44
 
45
typedef void (*ofw_entry)(ofw_args_t *);
45
typedef void (*ofw_entry)(ofw_args_t *);
46
 
46
 
47
ofw_entry ofw;
47
ofw_entry ofw;
48
 
48
 
49
phandle ofw_chosen;
49
phandle ofw_chosen;
50
ihandle ofw_stdout;
50
ihandle ofw_stdout;
51
phandle ofw_root;
51
phandle ofw_root;
52
ihandle ofw_mmu;
52
ihandle ofw_mmu;
53
phandle ofw_memory;
53
phandle ofw_memory;
54
phandle ofw_aliases;
54
phandle ofw_aliases;
55
 
55
 
56
static int ofw_call(const char *service, const int nargs, const int nret, ofw_arg_t *rets, ...)
56
static unsigned long ofw_call(const char *service, const int nargs, const int nret, ofw_arg_t *rets, ...)
57
{
57
{
58
    va_list list;
58
    va_list list;
59
    ofw_args_t args;
59
    ofw_args_t args;
60
    int i;
60
    int i;
61
   
61
   
62
    args.service = service;
62
    args.service = service;
63
    args.nargs = nargs;
63
    args.nargs = nargs;
64
    args.nret = nret;
64
    args.nret = nret;
65
   
65
   
66
    va_start(list, rets);
66
    va_start(list, rets);
67
    for (i = 0; i < nargs; i++)
67
    for (i = 0; i < nargs; i++)
68
        args.args[i] = va_arg(list, ofw_arg_t);
68
        args.args[i] = va_arg(list, ofw_arg_t);
69
    va_end(list);
69
    va_end(list);
70
   
70
   
71
    for (i = 0; i < nret; i++)
71
    for (i = 0; i < nret; i++)
72
        args.args[i + nargs] = 0;
72
        args.args[i + nargs] = 0;
73
   
73
   
74
    ofw(&args);
74
    ofw(&args);
75
   
75
   
76
    for (i = 1; i < nret; i++)
76
    for (i = 1; i < nret; i++)
77
        rets[i - 1] = args.args[i + nargs];
77
        rets[i - 1] = args.args[i + nargs];
78
   
78
   
79
    return args.args[nargs];
79
    return args.args[nargs];
80
}
80
}
81
 
81
 
82
 
82
 
83
phandle ofw_find_device(const char *name)
83
phandle ofw_find_device(const char *name)
84
{
84
{
85
    return ofw_call("finddevice", 1, 1, NULL, name);
85
    return ofw_call("finddevice", 1, 1, NULL, name);
86
}
86
}
87
 
87
 
88
 
88
 
89
int ofw_get_property(const phandle device, const char *name, const void *buf, const int buflen)
89
int ofw_get_property(const phandle device, const char *name, const void *buf, const int buflen)
90
{
90
{
91
    return ofw_call("getprop", 4, 1, NULL, device, name, buf, buflen);
91
    return ofw_call("getprop", 4, 1, NULL, device, name, buf, buflen);
92
}
92
}
93
 
93
 
94
 
94
 
95
static unsigned int ofw_get_address_cells(const phandle device)
95
static unsigned int ofw_get_address_cells(const phandle device)
96
{
96
{
97
    unsigned int ret;
97
    unsigned int ret;
98
   
98
   
99
    if (ofw_get_property(device, "#address-cells", &ret, sizeof(ret)) <= 0)
99
    if (ofw_get_property(device, "#address-cells", &ret, sizeof(ret)) <= 0)
100
        if (ofw_get_property(ofw_root, "#address-cells", &ret, sizeof(ret)) <= 0)
100
        if (ofw_get_property(ofw_root, "#address-cells", &ret, sizeof(ret)) <= 0)
101
            ret = 1;
101
            ret = 1;
102
   
102
   
103
    return ret;
103
    return ret;
104
}
104
}
105
 
105
 
106
 
106
 
107
static unsigned int ofw_get_size_cells(const phandle device)
107
static unsigned int ofw_get_size_cells(const phandle device)
108
{
108
{
109
    unsigned int ret;
109
    unsigned int ret;
110
   
110
   
111
    if (ofw_get_property(device, "#size-cells", &ret, sizeof(ret)) <= 0)
111
    if (ofw_get_property(device, "#size-cells", &ret, sizeof(ret)) <= 0)
112
        if (ofw_get_property(ofw_root, "#size-cells", &ret, sizeof(ret)) <= 0)
112
        if (ofw_get_property(ofw_root, "#size-cells", &ret, sizeof(ret)) <= 0)
113
            ret = 1;
113
            ret = 1;
114
   
114
   
115
    return ret;
115
    return ret;
116
}
116
}
117
 
117
 
118
 
118
 
119
static ihandle ofw_open(const char *name)
119
static ihandle ofw_open(const char *name)
120
{
120
{
121
    return ofw_call("open", 1, 1, NULL, name);
121
    return ofw_call("open", 1, 1, NULL, name);
122
}
122
}
123
 
123
 
124
 
124
 
125
void init(void)
125
void init(void)
126
{
126
{
127
    ofw_chosen = ofw_find_device("/chosen");
127
    ofw_chosen = ofw_find_device("/chosen");
128
    if (ofw_chosen == -1)
128
    if (ofw_chosen == -1)
129
        halt();
129
        halt();
130
   
130
   
131
    if (ofw_get_property(ofw_chosen, "stdout",  &ofw_stdout, sizeof(ofw_stdout)) <= 0)
131
    if (ofw_get_property(ofw_chosen, "stdout",  &ofw_stdout, sizeof(ofw_stdout)) <= 0)
132
        ofw_stdout = 0;
132
        ofw_stdout = 0;
133
   
133
   
134
    ofw_root = ofw_find_device("/");
134
    ofw_root = ofw_find_device("/");
135
    if (ofw_root == -1) {
135
    if (ofw_root == -1) {
136
        puts("\r\nError: Unable to find / device, halted.\r\n");
136
        puts("\r\nError: Unable to find / device, halted.\r\n");
137
        halt();
137
        halt();
138
    }
138
    }
139
   
139
   
140
    if (ofw_get_property(ofw_chosen, "mmu",  &ofw_mmu, sizeof(ofw_mmu)) <= 0) {
140
    if (ofw_get_property(ofw_chosen, "mmu",  &ofw_mmu, sizeof(ofw_mmu)) <= 0) {
141
        puts("\r\nError: Unable to get mmu property, halted.\r\n");
141
        puts("\r\nError: Unable to get mmu property, halted.\r\n");
142
        halt();
142
        halt();
143
    }
143
    }
144
   
144
   
145
    ofw_memory = ofw_find_device("/memory");
145
    ofw_memory = ofw_find_device("/memory");
146
    if (ofw_memory == -1) {
146
    if (ofw_memory == -1) {
147
        puts("\r\nError: Unable to find /memory device, halted.\r\n");
147
        puts("\r\nError: Unable to find /memory device, halted.\r\n");
148
        halt();
148
        halt();
149
    }
149
    }
150
   
150
   
151
    ofw_aliases = ofw_find_device("/aliases");
151
    ofw_aliases = ofw_find_device("/aliases");
152
    if (ofw_aliases == -1) {
152
    if (ofw_aliases == -1) {
153
        puts("\r\nError: Unable to find /aliases device, halted.\r\n");
153
        puts("\r\nError: Unable to find /aliases device, halted.\r\n");
154
        halt();
154
        halt();
155
    }
155
    }
156
}
156
}
157
 
157
 
158
 
158
 
159
void ofw_write(const char *str, const int len)
159
void ofw_write(const char *str, const int len)
160
{
160
{
161
    if (ofw_stdout == 0)
161
    if (ofw_stdout == 0)
162
        return;
162
        return;
163
   
163
   
164
    ofw_call("write", 3, 1, NULL, ofw_stdout, str, len);
164
    ofw_call("write", 3, 1, NULL, ofw_stdout, str, len);
165
}
165
}
166
 
166
 
167
 
167
 
168
void *ofw_translate(const void *virt)
168
void *ofw_translate(const void *virt)
169
{
169
{
170
    ofw_arg_t result[3];
170
    ofw_arg_t result[3];
171
   
171
   
172
    if (ofw_call("call-method", 4, 4, result, "translate", ofw_mmu, virt, 1) != 0) {
172
    if (ofw_call("call-method", 4, 4, result, "translate", ofw_mmu, virt, 1) != 0) {
173
        puts("Error: MMU method translate() failed, halting.\n");
173
        puts("Error: MMU method translate() failed, halting.\n");
174
        halt();
174
        halt();
175
    }
175
    }
176
    return (void *) result[2];
176
    return (void *) result[2];
177
}
177
}
178
 
178
 
179
 
179
 
180
int ofw_map(const void *phys, const void *virt, const int size, const int mode)
180
int ofw_map(const void *phys, const void *virt, const int size, const int mode)
181
{
181
{
182
    return ofw_call("call-method", 6, 1, NULL, "map", ofw_mmu, mode, size, virt, phys);
182
    return ofw_call("call-method", 6, 1, NULL, "map", ofw_mmu, mode, size, virt, phys);
183
}
183
}
184
 
184
 
185
 
185
 
186
int ofw_memmap(memmap_t *map)
186
int ofw_memmap(memmap_t *map)
187
{
187
{
188
    unsigned long buf[BUF_SIZE];
188
    unsigned long buf[BUF_SIZE];
189
    int ret = ofw_get_property(ofw_memory, "reg", buf, sizeof(buf));
189
    int ret = ofw_get_property(ofw_memory, "reg", buf, sizeof(buf));
190
    if (ret <= 0)
190
    if (ret <= 0)
191
        return false;
191
        return false;
192
       
192
       
193
    unsigned int ac = ofw_get_address_cells(ofw_memory);
193
    unsigned int ac = ofw_get_address_cells(ofw_memory);
194
    unsigned int sc = ofw_get_size_cells(ofw_memory);
194
    unsigned int sc = ofw_get_size_cells(ofw_memory);
195
   
195
   
196
    int pos;
196
    int pos;
197
    map->total = 0;
197
    map->total = 0;
198
    map->count = 0;
198
    map->count = 0;
199
    for (pos = 0; (pos < ret / sizeof(unsigned long)) && (map->count < MEMMAP_MAX_RECORDS); pos += ac + sc) {
199
    for (pos = 0; (pos < ret / sizeof(unsigned long)) && (map->count < MEMMAP_MAX_RECORDS); pos += ac + sc) {
200
        void * start = (void *) buf[pos + ac - 1];
200
        void * start = (void *) buf[pos + ac - 1];
201
        unsigned int size = buf[pos + ac + sc - 1];
201
        unsigned int size = buf[pos + ac + sc - 1];
202
       
202
       
203
        if (size > 0) {
203
        if (size > 0) {
204
            map->zones[map->count].start = start;
204
            map->zones[map->count].start = start;
205
            map->zones[map->count].size = size;
205
            map->zones[map->count].size = size;
206
            map->count++;
206
            map->count++;
207
            map->total += size;
207
            map->total += size;
208
        }
208
        }
209
    }
209
    }
210
}
210
}
211
 
211
 
212
 
212
 
213
int ofw_screen(screen_t *screen)
213
int ofw_screen(screen_t *screen)
214
{
214
{
215
    char device_name[BUF_SIZE];
215
    char device_name[BUF_SIZE];
216
   
216
   
217
    if (ofw_get_property(ofw_aliases, "screen", device_name, sizeof(device_name)) <= 0)
217
    if (ofw_get_property(ofw_aliases, "screen", device_name, sizeof(device_name)) <= 0)
218
        return false;
218
        return false;
219
   
219
   
220
    phandle device = ofw_find_device(device_name);
220
    phandle device = ofw_find_device(device_name);
221
    if (device == -1)
221
    if (device == -1)
222
        return false;
222
        return false;
223
   
223
   
224
    if (ofw_get_property(device, "address", &screen->addr, sizeof(screen->addr)) <= 0)
224
    if (ofw_get_property(device, "address", &screen->addr, sizeof(screen->addr)) <= 0)
225
        return false;
225
        return false;
226
   
226
   
227
    if (ofw_get_property(device, "width", &screen->width, sizeof(screen->width)) <= 0)
227
    if (ofw_get_property(device, "width", &screen->width, sizeof(screen->width)) <= 0)
228
        return false;
228
        return false;
229
   
229
   
230
    if (ofw_get_property(device, "height", &screen->height, sizeof(screen->height)) <= 0)
230
    if (ofw_get_property(device, "height", &screen->height, sizeof(screen->height)) <= 0)
231
        return false;
231
        return false;
232
   
232
   
233
    if (ofw_get_property(device, "depth", &screen->bpp, sizeof(screen->bpp)) <= 0)
233
    if (ofw_get_property(device, "depth", &screen->bpp, sizeof(screen->bpp)) <= 0)
234
        return false;
234
        return false;
235
   
235
   
236
    if (ofw_get_property(device, "linebytes", &screen->scanline, sizeof(screen->scanline)) <= 0)
236
    if (ofw_get_property(device, "linebytes", &screen->scanline, sizeof(screen->scanline)) <= 0)
237
        return false;
237
        return false;
238
   
238
   
239
    return true;
239
    return true;
240
}
240
}
241
 
241
 
242
 
242