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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 | |||
1755 | decky | 53 | typedef struct { |
54 | unsigned int info; |
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55 | unsigned int addr_hi; |
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56 | unsigned int addr_lo; |
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57 | } pci_addr_t; |
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58 | |||
59 | typedef struct { |
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60 | pci_addr_t addr; |
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61 | unsigned int size_hi; |
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62 | unsigned int size_lo; |
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63 | } pci_reg_t; |
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64 | |||
65 | |||
885 | decky | 66 | ofw_entry ofw; |
67 | |||
68 | phandle ofw_chosen; |
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1146 | decky | 69 | ihandle ofw_stdout; |
70 | phandle ofw_root; |
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71 | ihandle ofw_mmu; |
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72 | phandle ofw_memory; |
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1130 | decky | 73 | phandle ofw_aliases; |
885 | decky | 74 | |
75 | |||
1146 | decky | 76 | static int ofw_call(const char *service, const int nargs, const int nret, ofw_arg_t *rets, ...) |
885 | decky | 77 | { |
78 | va_list list; |
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79 | ofw_args_t args; |
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80 | int i; |
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81 | |||
82 | args.service = service; |
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83 | args.nargs = nargs; |
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84 | args.nret = nret; |
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85 | |||
1146 | decky | 86 | va_start(list, rets); |
885 | decky | 87 | for (i = 0; i < nargs; i++) |
88 | args.args[i] = va_arg(list, ofw_arg_t); |
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89 | va_end(list); |
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90 | |||
91 | for (i = 0; i < nret; i++) |
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92 | args.args[i + nargs] = 0; |
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93 | |||
94 | ofw(&args); |
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95 | |||
1146 | decky | 96 | for (i = 1; i < nret; i++) |
97 | rets[i - 1] = args.args[i + nargs]; |
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98 | |||
956 | decky | 99 | return args.args[nargs]; |
885 | decky | 100 | } |
101 | |||
102 | |||
964 | decky | 103 | static phandle ofw_find_device(const char *name) |
953 | decky | 104 | { |
1146 | decky | 105 | return ofw_call("finddevice", 1, 1, NULL, name); |
964 | decky | 106 | } |
107 | |||
108 | |||
109 | static int ofw_get_property(const phandle device, const char *name, const void *buf, const int buflen) |
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110 | { |
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1146 | decky | 111 | return ofw_call("getprop", 4, 1, NULL, device, name, buf, buflen); |
964 | decky | 112 | } |
113 | |||
1146 | decky | 114 | |
115 | static unsigned int ofw_get_address_cells(const phandle device) |
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116 | { |
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117 | unsigned int ret; |
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118 | |||
119 | if (ofw_get_property(device, "#address-cells", &ret, sizeof(ret)) <= 0) |
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120 | if (ofw_get_property(ofw_root, "#address-cells", &ret, sizeof(ret)) <= 0) |
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121 | ret = 1; |
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122 | |||
123 | return ret; |
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124 | } |
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125 | |||
126 | |||
127 | static unsigned int ofw_get_size_cells(const phandle device) |
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128 | { |
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129 | unsigned int ret; |
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130 | |||
131 | if (ofw_get_property(device, "#size-cells", &ret, sizeof(ret)) <= 0) |
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132 | if (ofw_get_property(ofw_root, "#size-cells", &ret, sizeof(ret)) <= 0) |
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133 | ret = 1; |
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134 | |||
135 | return ret; |
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136 | } |
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137 | |||
138 | |||
964 | decky | 139 | static ihandle ofw_open(const char *name) |
140 | { |
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1146 | decky | 141 | return ofw_call("open", 1, 1, NULL, name); |
953 | decky | 142 | } |
143 | |||
144 | |||
964 | decky | 145 | void init(void) |
885 | decky | 146 | { |
964 | decky | 147 | ofw_chosen = ofw_find_device("/chosen"); |
148 | if (ofw_chosen == -1) |
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149 | halt(); |
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885 | decky | 150 | |
1146 | decky | 151 | if (ofw_get_property(ofw_chosen, "stdout", &ofw_stdout, sizeof(ofw_stdout)) <= 0) |
964 | decky | 152 | ofw_stdout = 0; |
153 | |||
1146 | decky | 154 | ofw_root = ofw_find_device("/"); |
155 | if (ofw_root == -1) { |
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156 | puts("\r\nError: Unable to find / device, halted.\r\n"); |
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1130 | decky | 157 | halt(); |
158 | } |
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159 | |||
1146 | decky | 160 | if (ofw_get_property(ofw_chosen, "mmu", &ofw_mmu, sizeof(ofw_mmu)) <= 0) { |
161 | puts("\r\nError: Unable to get mmu property, halted.\r\n"); |
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964 | decky | 162 | halt(); |
163 | } |
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1146 | decky | 164 | |
165 | ofw_memory = ofw_find_device("/memory"); |
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166 | if (ofw_memory == -1) { |
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167 | puts("\r\nError: Unable to find /memory device, halted.\r\n"); |
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168 | halt(); |
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169 | } |
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170 | |||
171 | ofw_aliases = ofw_find_device("/aliases"); |
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172 | if (ofw_aliases == -1) { |
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173 | puts("\r\nError: Unable to find /aliases device, halted.\r\n"); |
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174 | halt(); |
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175 | } |
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885 | decky | 176 | } |
177 | |||
178 | |||
964 | decky | 179 | void ofw_write(const char *str, const int len) |
885 | decky | 180 | { |
964 | decky | 181 | if (ofw_stdout == 0) |
182 | return; |
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183 | |||
1146 | decky | 184 | ofw_call("write", 3, 1, NULL, ofw_stdout, str, len); |
885 | decky | 185 | } |
186 | |||
187 | |||
956 | decky | 188 | void *ofw_translate(const void *virt) |
885 | decky | 189 | { |
1146 | decky | 190 | ofw_arg_t result[3]; |
191 | |||
192 | if (ofw_call("call-method", 4, 4, result, "translate", ofw_mmu, virt, 1) != 0) { |
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193 | puts("Error: MMU method translate() failed, halting.\n"); |
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194 | halt(); |
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195 | } |
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196 | return (void *) result[2]; |
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885 | decky | 197 | } |
953 | decky | 198 | |
199 | |||
1075 | decky | 200 | int ofw_map(const void *phys, const void *virt, const int size, const int mode) |
201 | { |
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1146 | decky | 202 | return ofw_call("call-method", 6, 1, NULL, "map", ofw_mmu, mode, size, virt, phys); |
1075 | decky | 203 | } |
204 | |||
205 | |||
964 | decky | 206 | int ofw_memmap(memmap_t *map) |
207 | { |
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1146 | decky | 208 | unsigned int buf[BUF_SIZE]; |
209 | int ret = ofw_get_property(ofw_memory, "reg", buf, sizeof(unsigned int) * BUF_SIZE); |
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210 | if (ret <= 0) |
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964 | decky | 211 | return false; |
1146 | decky | 212 | |
213 | unsigned int ac = ofw_get_address_cells(ofw_memory); |
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214 | unsigned int sc = ofw_get_size_cells(ofw_memory); |
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964 | decky | 215 | |
1146 | decky | 216 | int pos; |
964 | decky | 217 | map->total = 0; |
218 | map->count = 0; |
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1146 | decky | 219 | for (pos = 0; (pos < ret / sizeof(unsigned int)) && (map->count < MEMMAP_MAX_RECORDS); pos += ac + sc) { |
220 | void * start = (void *) buf[pos + ac - 1]; |
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221 | unsigned int size = buf[pos + ac + sc - 1]; |
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222 | |||
223 | if (size > 0) { |
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224 | map->zones[map->count].start = start; |
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225 | map->zones[map->count].size = size; |
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226 | map->count++; |
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227 | map->total += size; |
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228 | } |
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964 | decky | 229 | } |
230 | } |
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1130 | decky | 231 | |
232 | |||
233 | int ofw_screen(screen_t *screen) |
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234 | { |
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1146 | decky | 235 | char device_name[BUF_SIZE]; |
1130 | decky | 236 | |
1146 | decky | 237 | if (ofw_get_property(ofw_aliases, "screen", device_name, sizeof(char) * BUF_SIZE) <= 0) |
1130 | decky | 238 | return false; |
239 | |||
240 | phandle device = ofw_find_device(device_name); |
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241 | if (device == -1) |
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242 | return false; |
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243 | |||
244 | if (ofw_get_property(device, "address", &screen->addr, sizeof(screen->addr)) <= 0) |
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245 | return false; |
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246 | |||
247 | if (ofw_get_property(device, "width", &screen->width, sizeof(screen->width)) <= 0) |
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248 | return false; |
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249 | |||
250 | if (ofw_get_property(device, "height", &screen->height, sizeof(screen->height)) <= 0) |
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251 | return false; |
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252 | |||
253 | if (ofw_get_property(device, "depth", &screen->bpp, sizeof(screen->bpp)) <= 0) |
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254 | return false; |
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255 | |||
256 | if (ofw_get_property(device, "linebytes", &screen->scanline, sizeof(screen->scanline)) <= 0) |
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257 | return false; |
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258 | |||
259 | return true; |
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260 | } |
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1620 | decky | 261 | |
262 | |||
263 | int ofw_keyboard(keyboard_t *keyboard) |
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264 | { |
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265 | char device_name[BUF_SIZE]; |
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266 | |||
267 | if (ofw_get_property(ofw_aliases, "macio", device_name, sizeof(char) * BUF_SIZE) <= 0) |
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268 | return false; |
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269 | |||
270 | phandle device = ofw_find_device(device_name); |
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271 | if (device == -1) |
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272 | return false; |
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273 | |||
1755 | decky | 274 | pci_reg_t macio; |
275 | if (ofw_get_property(device, "assigned-addresses", &macio, sizeof(macio)) <= 0) |
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276 | return false; |
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1620 | decky | 277 | |
1755 | decky | 278 | keyboard->addr = (void *) macio.addr.addr_lo; |
279 | keyboard->size = macio.size_lo; |
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280 | |||
1620 | decky | 281 | return true; |
282 | } |