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885 decky 1
/*
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 * Copyright (C) 2005 Martin Decky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * 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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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
1789 jermar 29
#include <ofw.h>
30
#include <ofwarch.h>
1764 jermar 31
#include <printf.h>
32
#include <asm.h>
1782 jermar 33
#include <types.h>
885 decky 34
 
1783 jermar 35
uintptr_t ofw_cif;
964 decky 36
 
885 decky 37
phandle ofw_chosen;
1146 decky 38
ihandle ofw_stdout;
39
phandle ofw_root;
40
ihandle ofw_mmu;
41
phandle ofw_memory;
1130 decky 42
phandle ofw_aliases;
885 decky 43
 
1789 jermar 44
void ofw_init(void)
45
{
46
    ofw_chosen = ofw_find_device("/chosen");
47
    if (ofw_chosen == -1)
48
        halt();
49
 
50
    if (ofw_get_property(ofw_chosen, "stdout",  &ofw_stdout, sizeof(ofw_stdout)) <= 0)
51
        ofw_stdout = 0;
52
 
53
    ofw_root = ofw_find_device("/");
54
    if (ofw_root == -1) {
55
        puts("\r\nError: Unable to find / device, halted.\r\n");
56
        halt();
57
    }
58
 
59
    if (ofw_get_property(ofw_chosen, "mmu",  &ofw_mmu, sizeof(ofw_mmu)) <= 0) {
60
        puts("\r\nError: Unable to get mmu property, halted.\r\n");
61
        halt();
62
    }
63
 
64
    ofw_memory = ofw_find_device("/memory");
65
    if (ofw_memory == -1) {
66
        puts("\r\nError: Unable to find /memory device, halted.\r\n");
67
        halt();
68
    }
69
 
70
    ofw_aliases = ofw_find_device("/aliases");
71
    if (ofw_aliases == -1) {
72
        puts("\r\nError: Unable to find /aliases device, halted.\r\n");
73
        halt();
74
    }
75
}
76
 
1790 jermar 77
/** Perform a call to OpenFirmware client interface.
78
 *
79
 * @param service String identifying the service requested.
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 * @param nargs Number of input arguments.
81
 * @param nret Number of output arguments. This includes the return value.
82
 * @param rets Buffer for output arguments or NULL. The buffer must accommodate nret - 1 items.
83
 *
84
 * @return Return value returned by the client interface.
85
 */
1899 jermar 86
unsigned long ofw_call(const char *service, const int nargs, const int nret, ofw_arg_t *rets, ...)
885 decky 87
{
88
    va_list list;
89
    ofw_args_t args;
90
    int i;
91
 
1790 jermar 92
    args.service = (ofw_arg_t) service;
885 decky 93
    args.nargs = nargs;
94
    args.nret = nret;
95
 
1146 decky 96
    va_start(list, rets);
885 decky 97
    for (i = 0; i < nargs; i++)
98
        args.args[i] = va_arg(list, ofw_arg_t);
99
    va_end(list);
100
 
101
    for (i = 0; i < nret; i++)
102
        args.args[i + nargs] = 0;
103
 
1783 jermar 104
    (void) ofw(&args);
105
 
1146 decky 106
    for (i = 1; i < nret; i++)
107
        rets[i - 1] = args.args[i + nargs];
1783 jermar 108
 
956 decky 109
    return args.args[nargs];
885 decky 110
}
111
 
1771 jermar 112
phandle ofw_find_device(const char *name)
953 decky 113
{
1146 decky 114
    return ofw_call("finddevice", 1, 1, NULL, name);
964 decky 115
}
116
 
1895 jermar 117
int ofw_get_property(const phandle device, const char *name, void *buf, const int buflen)
964 decky 118
{
1146 decky 119
    return ofw_call("getprop", 4, 1, NULL, device, name, buf, buflen);
964 decky 120
}
121
 
1893 jermar 122
int ofw_get_proplen(const phandle device, const char *name)
123
{
124
    return ofw_call("getproplen", 2, 1, NULL, device, name);
125
}
1146 decky 126
 
1893 jermar 127
int ofw_next_property(const phandle device, char *previous, char *buf)
128
{
129
    return ofw_call("nextprop", 3, 1, NULL, device, previous, buf);
130
}
131
 
1895 jermar 132
int ofw_package_to_path(const phandle device, char *buf, const int buflen)
133
{
134
    return ofw_call("package-to-path", 3, 1, NULL, device, buf, buflen);
135
}
136
 
1789 jermar 137
unsigned int ofw_get_address_cells(const phandle device)
1146 decky 138
{
1789 jermar 139
    unsigned int ret = 1;
1146 decky 140
 
141
    if (ofw_get_property(device, "#address-cells", &ret, sizeof(ret)) <= 0)
142
        if (ofw_get_property(ofw_root, "#address-cells", &ret, sizeof(ret)) <= 0)
1789 jermar 143
            ret = OFW_ADDRESS_CELLS;
1146 decky 144
 
145
    return ret;
146
}
147
 
148
 
1789 jermar 149
unsigned int ofw_get_size_cells(const phandle device)
1146 decky 150
{
151
    unsigned int ret;
152
 
153
    if (ofw_get_property(device, "#size-cells", &ret, sizeof(ret)) <= 0)
154
        if (ofw_get_property(ofw_root, "#size-cells", &ret, sizeof(ret)) <= 0)
1789 jermar 155
            ret = OFW_SIZE_CELLS;
1146 decky 156
 
157
    return ret;
158
}
159
 
1881 jermar 160
phandle ofw_get_child_node(const phandle node)
161
{
162
    return ofw_call("child", 1, 1, NULL, node);
163
}
1146 decky 164
 
1881 jermar 165
phandle ofw_get_peer_node(const phandle node)
166
{
167
    return ofw_call("peer", 1, 1, NULL, node);
168
}
169
 
964 decky 170
static ihandle ofw_open(const char *name)
171
{
1146 decky 172
    return ofw_call("open", 1, 1, NULL, name);
953 decky 173
}
174
 
175
 
964 decky 176
void ofw_write(const char *str, const int len)
885 decky 177
{
964 decky 178
    if (ofw_stdout == 0)
179
        return;
180
 
1146 decky 181
    ofw_call("write", 3, 1, NULL, ofw_stdout, str, len);
885 decky 182
}
183
 
184
 
956 decky 185
void *ofw_translate(const void *virt)
885 decky 186
{
1782 jermar 187
    ofw_arg_t result[4];
188
    int shift;
189
 
190
    if (ofw_call("call-method", 3, 5, result, "translate", ofw_mmu, virt) != 0) {
1146 decky 191
        puts("Error: MMU method translate() failed, halting.\n");
192
        halt();
193
    }
1782 jermar 194
 
1783 jermar 195
    if (ofw_translate_failed(result[0]))
196
        return NULL;
197
 
1782 jermar 198
    if (sizeof(unative_t) == 8)
199
        shift = 32;
200
    else
201
        shift = 0;
1789 jermar 202
 
1783 jermar 203
    return (void *) ((result[2]<<shift)|result[3]);
885 decky 204
}
953 decky 205
 
1783 jermar 206
void *ofw_claim(const void *virt, const int len)
207
{
208
    ofw_arg_t retaddr;
209
    int shift;
953 decky 210
 
1783 jermar 211
    if (ofw_call("call-method", 5, 2, &retaddr, "claim", ofw_mmu, 0, len, virt) != 0) {
212
        puts("Error: MMU method claim() failed, halting.\n");
213
        halt();
214
    }
215
 
216
    return (void *) retaddr;
217
}
218
 
1075 decky 219
int ofw_map(const void *phys, const void *virt, const int size, const int mode)
220
{
1782 jermar 221
    uintptr_t phys_hi, phys_lo;
222
 
223
    if (sizeof(unative_t) == 8) {
224
        int shift = 32;
225
        phys_hi = (uintptr_t) phys >> shift;
226
        phys_lo = (uintptr_t) phys & 0xffffffff;
227
    } else {
228
        phys_hi = 0;
229
        phys_lo = (uintptr_t) phys;
230
    }
231
 
232
    return ofw_call("call-method", 7, 1, NULL, "map", ofw_mmu, mode, size, virt,
233
        phys_hi, phys_lo);
1075 decky 234
}
235
 
236
 
964 decky 237
int ofw_memmap(memmap_t *map)
238
{
1789 jermar 239
    unsigned int ac = ofw_get_address_cells(ofw_memory);
240
    unsigned int sc = ofw_get_size_cells(ofw_memory);
241
 
242
    uint32_t buf[((ac+sc)*MEMMAP_MAX_RECORDS)];
1771 jermar 243
    int ret = ofw_get_property(ofw_memory, "reg", buf, sizeof(buf));
1789 jermar 244
    if (ret <= 0)       /* ret is the number of written bytes */
964 decky 245
        return false;
1789 jermar 246
 
1146 decky 247
    int pos;
964 decky 248
    map->total = 0;
249
    map->count = 0;
1789 jermar 250
    for (pos = 0; (pos < ret / sizeof(uint32_t)) && (map->count < MEMMAP_MAX_RECORDS); pos += ac + sc) {
251
        void * start = (void *) ((uintptr_t) buf[pos + ac - 1]);
1146 decky 252
        unsigned int size = buf[pos + ac + sc - 1];
253
 
254
        if (size > 0) {
255
            map->zones[map->count].start = start;
256
            map->zones[map->count].size = size;
257
            map->count++;
258
            map->total += size;
259
        }
964 decky 260
    }
1789 jermar 261
 
262
    return true;
964 decky 263
}
1130 decky 264
 
265
 
266
int ofw_screen(screen_t *screen)
267
{
1146 decky 268
    char device_name[BUF_SIZE];
1789 jermar 269
    uint32_t virtaddr;
1130 decky 270
 
1771 jermar 271
    if (ofw_get_property(ofw_aliases, "screen", device_name, sizeof(device_name)) <= 0)
1130 decky 272
        return false;
273
 
274
    phandle device = ofw_find_device(device_name);
275
    if (device == -1)
276
        return false;
277
 
1789 jermar 278
    if (ofw_get_property(device, "address", &virtaddr, sizeof(virtaddr)) <= 0)
1130 decky 279
        return false;
1789 jermar 280
 
281
    screen->addr = (void *) ((uintptr_t) virtaddr);
282
 
1130 decky 283
    if (ofw_get_property(device, "width", &screen->width, sizeof(screen->width)) <= 0)
284
        return false;
285
 
286
    if (ofw_get_property(device, "height", &screen->height, sizeof(screen->height)) <= 0)
287
        return false;
288
 
289
    if (ofw_get_property(device, "depth", &screen->bpp, sizeof(screen->bpp)) <= 0)
290
        return false;
291
 
292
    if (ofw_get_property(device, "linebytes", &screen->scanline, sizeof(screen->scanline)) <= 0)
293
        return false;
294
 
295
    return true;
296
}
1947 decky 297
 
298
 
299
void ofw_quiesce(void)
300
{
1977 jermar 301
    ofw_call("quiesce", 0, 0, NULL);
1947 decky 302
}