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885 | decky | 1 | /* |
2 | * Copyright (C) 2005 Martin Decky |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | #include "ofw.h" |
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1058 | decky | 30 | #include "asm.h" |
953 | decky | 31 | #include "printf.h" |
885 | decky | 32 | |
964 | decky | 33 | #define MAX_OFW_ARGS 10 |
1146 | decky | 34 | #define BUF_SIZE 1024 |
964 | decky | 35 | |
36 | typedef unsigned int ofw_arg_t; |
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37 | typedef unsigned int ihandle; |
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38 | typedef unsigned int phandle; |
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39 | |||
40 | /** OpenFirmware command structure |
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41 | * |
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42 | */ |
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43 | typedef struct { |
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44 | const char *service; /**< Command name */ |
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45 | unsigned int nargs; /**< Number of in arguments */ |
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46 | unsigned int nret; /**< Number of out arguments */ |
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47 | ofw_arg_t args[MAX_OFW_ARGS]; /**< List of arguments */ |
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48 | } ofw_args_t; |
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49 | |||
50 | typedef void (*ofw_entry)(ofw_args_t *); |
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51 | |||
52 | |||
885 | decky | 53 | ofw_entry ofw; |
54 | |||
55 | phandle ofw_chosen; |
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1146 | decky | 56 | ihandle ofw_stdout; |
57 | phandle ofw_root; |
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58 | ihandle ofw_mmu; |
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59 | phandle ofw_memory; |
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1130 | decky | 60 | phandle ofw_aliases; |
885 | decky | 61 | |
62 | |||
1146 | decky | 63 | static int ofw_call(const char *service, const int nargs, const int nret, ofw_arg_t *rets, ...) |
885 | decky | 64 | { |
65 | va_list list; |
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66 | ofw_args_t args; |
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67 | int i; |
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68 | |||
69 | args.service = service; |
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70 | args.nargs = nargs; |
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71 | args.nret = nret; |
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72 | |||
1146 | decky | 73 | va_start(list, rets); |
885 | decky | 74 | for (i = 0; i < nargs; i++) |
75 | args.args[i] = va_arg(list, ofw_arg_t); |
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76 | va_end(list); |
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77 | |||
78 | for (i = 0; i < nret; i++) |
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79 | args.args[i + nargs] = 0; |
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80 | |||
81 | ofw(&args); |
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82 | |||
1146 | decky | 83 | for (i = 1; i < nret; i++) |
84 | rets[i - 1] = args.args[i + nargs]; |
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85 | |||
956 | decky | 86 | return args.args[nargs]; |
885 | decky | 87 | } |
88 | |||
89 | |||
964 | decky | 90 | static phandle ofw_find_device(const char *name) |
953 | decky | 91 | { |
1146 | decky | 92 | return ofw_call("finddevice", 1, 1, NULL, name); |
964 | decky | 93 | } |
94 | |||
95 | |||
96 | static int ofw_get_property(const phandle device, const char *name, const void *buf, const int buflen) |
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97 | { |
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1146 | decky | 98 | return ofw_call("getprop", 4, 1, NULL, device, name, buf, buflen); |
964 | decky | 99 | } |
100 | |||
1146 | decky | 101 | |
102 | static unsigned int ofw_get_address_cells(const phandle device) |
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103 | { |
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104 | unsigned int ret; |
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105 | |||
106 | if (ofw_get_property(device, "#address-cells", &ret, sizeof(ret)) <= 0) |
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107 | if (ofw_get_property(ofw_root, "#address-cells", &ret, sizeof(ret)) <= 0) |
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108 | ret = 1; |
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109 | |||
110 | return ret; |
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111 | } |
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112 | |||
113 | |||
114 | static unsigned int ofw_get_size_cells(const phandle device) |
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115 | { |
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116 | unsigned int ret; |
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117 | |||
118 | if (ofw_get_property(device, "#size-cells", &ret, sizeof(ret)) <= 0) |
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119 | if (ofw_get_property(ofw_root, "#size-cells", &ret, sizeof(ret)) <= 0) |
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120 | ret = 1; |
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121 | |||
122 | return ret; |
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123 | } |
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124 | |||
125 | |||
964 | decky | 126 | static ihandle ofw_open(const char *name) |
127 | { |
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1146 | decky | 128 | return ofw_call("open", 1, 1, NULL, name); |
953 | decky | 129 | } |
130 | |||
131 | |||
964 | decky | 132 | void init(void) |
885 | decky | 133 | { |
964 | decky | 134 | ofw_chosen = ofw_find_device("/chosen"); |
135 | if (ofw_chosen == -1) |
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136 | halt(); |
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885 | decky | 137 | |
1146 | decky | 138 | if (ofw_get_property(ofw_chosen, "stdout", &ofw_stdout, sizeof(ofw_stdout)) <= 0) |
964 | decky | 139 | ofw_stdout = 0; |
140 | |||
1146 | decky | 141 | ofw_root = ofw_find_device("/"); |
142 | if (ofw_root == -1) { |
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143 | puts("\r\nError: Unable to find / device, halted.\r\n"); |
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1130 | decky | 144 | halt(); |
145 | } |
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146 | |||
1146 | decky | 147 | if (ofw_get_property(ofw_chosen, "mmu", &ofw_mmu, sizeof(ofw_mmu)) <= 0) { |
148 | puts("\r\nError: Unable to get mmu property, halted.\r\n"); |
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964 | decky | 149 | halt(); |
150 | } |
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1146 | decky | 151 | |
152 | ofw_memory = ofw_find_device("/memory"); |
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153 | if (ofw_memory == -1) { |
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154 | puts("\r\nError: Unable to find /memory device, halted.\r\n"); |
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155 | halt(); |
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156 | } |
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157 | |||
158 | ofw_aliases = ofw_find_device("/aliases"); |
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159 | if (ofw_aliases == -1) { |
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160 | puts("\r\nError: Unable to find /aliases device, halted.\r\n"); |
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161 | halt(); |
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162 | } |
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885 | decky | 163 | } |
164 | |||
165 | |||
964 | decky | 166 | void ofw_write(const char *str, const int len) |
885 | decky | 167 | { |
964 | decky | 168 | if (ofw_stdout == 0) |
169 | return; |
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170 | |||
1146 | decky | 171 | ofw_call("write", 3, 1, NULL, ofw_stdout, str, len); |
885 | decky | 172 | } |
173 | |||
174 | |||
956 | decky | 175 | void *ofw_translate(const void *virt) |
885 | decky | 176 | { |
1146 | decky | 177 | ofw_arg_t result[3]; |
178 | |||
179 | if (ofw_call("call-method", 4, 4, result, "translate", ofw_mmu, virt, 1) != 0) { |
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180 | puts("Error: MMU method translate() failed, halting.\n"); |
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181 | halt(); |
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182 | } |
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183 | return (void *) result[2]; |
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885 | decky | 184 | } |
953 | decky | 185 | |
186 | |||
1075 | decky | 187 | int ofw_map(const void *phys, const void *virt, const int size, const int mode) |
188 | { |
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1146 | decky | 189 | return ofw_call("call-method", 6, 1, NULL, "map", ofw_mmu, mode, size, virt, phys); |
1075 | decky | 190 | } |
191 | |||
192 | |||
964 | decky | 193 | int ofw_memmap(memmap_t *map) |
194 | { |
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1146 | decky | 195 | unsigned int buf[BUF_SIZE]; |
196 | int ret = ofw_get_property(ofw_memory, "reg", buf, sizeof(unsigned int) * BUF_SIZE); |
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197 | if (ret <= 0) |
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964 | decky | 198 | return false; |
1146 | decky | 199 | |
200 | unsigned int ac = ofw_get_address_cells(ofw_memory); |
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201 | unsigned int sc = ofw_get_size_cells(ofw_memory); |
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964 | decky | 202 | |
1146 | decky | 203 | int pos; |
964 | decky | 204 | map->total = 0; |
205 | map->count = 0; |
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1146 | decky | 206 | for (pos = 0; (pos < ret / sizeof(unsigned int)) && (map->count < MEMMAP_MAX_RECORDS); pos += ac + sc) { |
207 | void * start = (void *) buf[pos + ac - 1]; |
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208 | unsigned int size = buf[pos + ac + sc - 1]; |
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209 | |||
210 | if (size > 0) { |
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211 | map->zones[map->count].start = start; |
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212 | map->zones[map->count].size = size; |
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213 | map->count++; |
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214 | map->total += size; |
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215 | } |
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964 | decky | 216 | } |
217 | } |
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1130 | decky | 218 | |
219 | |||
220 | int ofw_screen(screen_t *screen) |
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221 | { |
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1146 | decky | 222 | char device_name[BUF_SIZE]; |
1130 | decky | 223 | |
1146 | decky | 224 | if (ofw_get_property(ofw_aliases, "screen", device_name, sizeof(char) * BUF_SIZE) <= 0) |
1130 | decky | 225 | return false; |
226 | |||
227 | phandle device = ofw_find_device(device_name); |
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228 | if (device == -1) |
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229 | return false; |
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230 | |||
231 | if (ofw_get_property(device, "address", &screen->addr, sizeof(screen->addr)) <= 0) |
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232 | return false; |
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233 | |||
234 | if (ofw_get_property(device, "width", &screen->width, sizeof(screen->width)) <= 0) |
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235 | return false; |
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236 | |||
237 | if (ofw_get_property(device, "height", &screen->height, sizeof(screen->height)) <= 0) |
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238 | return false; |
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239 | |||
240 | if (ofw_get_property(device, "depth", &screen->bpp, sizeof(screen->bpp)) <= 0) |
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241 | return false; |
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242 | |||
243 | if (ofw_get_property(device, "linebytes", &screen->scanline, sizeof(screen->scanline)) <= 0) |
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244 | return false; |
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245 | |||
246 | return true; |
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247 | } |