Root/
Source at commit 2381 created 10 years 21 days ago. By ifabio, Apply patch: (Credits to Thomas Jansen aka tja) - Reading options from all devices during boot. The options for the boot menu are only read from the devices rd(0,0) or bt(0,0). Consequently, boot menu options (e.g. "Quiet Boot", "Timeout", etc.) in plists on other devices (like most users have) are ignored. This patch extends the list of paths to search for the options plist on all devices that can be found. | |
---|---|
1 | /*␊ |
2 | * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.␊ |
3 | *␊ |
4 | * @APPLE_LICENSE_HEADER_START@␊ |
5 | * ␊ |
6 | * Portions Copyright (c) 1999-2003 Apple Computer, Inc. All Rights␊ |
7 | * Reserved. This file contains Original Code and/or Modifications of␊ |
8 | * Original Code as defined in and that are subject to the Apple Public␊ |
9 | * Source License Version 2.0 (the "License"). You may not use this file␊ |
10 | * except in compliance with the License. Please obtain a copy of the␊ |
11 | * License at http://www.apple.com/publicsource and read it before using␊ |
12 | * this file.␊ |
13 | * ␊ |
14 | * The Original Code and all software distributed under the License are␊ |
15 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
16 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
17 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
18 | * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the␊ |
19 | * License for the specific language governing rights and limitations␊ |
20 | * under the License.␊ |
21 | * ␊ |
22 | * @APPLE_LICENSE_HEADER_END@␊ |
23 | */␊ |
24 | /*␊ |
25 | * Copyright 1993 NeXT, Inc.␊ |
26 | * All rights reserved.␊ |
27 | */␊ |
28 | ␊ |
29 | #include "libsaio.h"␊ |
30 | #include "vbe.h"␊ |
31 | ␊ |
32 | /* ␊ |
33 | * Various inline routines for video I/O␊ |
34 | */␊ |
35 | static inline void␊ |
36 | outi (int port, int index, int val)␊ |
37 | {␊ |
38 | outw (port, (val << 8) | index);␊ |
39 | }␊ |
40 | ␊ |
41 | static inline void␊ |
42 | outib (int port, int index, int val)␊ |
43 | {␊ |
44 | outb (port, index);␊ |
45 | outb (port + 1, val);␊ |
46 | }␊ |
47 | ␊ |
48 | static inline int␊ |
49 | ini (int port, int index)␊ |
50 | {␊ |
51 | outb (port, index);␊ |
52 | return inb (port + 1);␊ |
53 | }␊ |
54 | ␊ |
55 | static inline void␊ |
56 | rmwi (int port, int index, int clear, int set)␊ |
57 | {␊ |
58 | outb (port, index);␊ |
59 | outb (port + 1, (inb (port + 1) & ~clear) | set);␊ |
60 | }␊ |
61 | ␊ |
62 | /*␊ |
63 | * Globals␊ |
64 | */␊ |
65 | static biosBuf_t bb;␊ |
66 | ␊ |
67 | int getVBEInfo( void * infoBlock )␊ |
68 | {␊ |
69 | bb.intno = 0x10;␊ |
70 | bb.eax.rr = funcGetControllerInfo;␊ |
71 | bb.es = SEG( infoBlock );␊ |
72 | bb.edi.rr = OFF( infoBlock );␊ |
73 | bios( &bb );␊ |
74 | return(bb.eax.r.h);␊ |
75 | }␊ |
76 | ␊ |
77 | int getVBEModeInfo( int mode, void * minfo_p )␊ |
78 | {␊ |
79 | bb.intno = 0x10;␊ |
80 | bb.eax.rr = funcGetModeInfo;␊ |
81 | bb.ecx.rr = mode;␊ |
82 | bb.es = SEG(minfo_p);␊ |
83 | bb.edi.rr = OFF(minfo_p);␊ |
84 | bios(&bb);␊ |
85 | return(bb.eax.r.h);␊ |
86 | }␊ |
87 | ␊ |
88 | int getVBEDACFormat(unsigned char *format)␊ |
89 | {␊ |
90 | bb.intno = 0x10;␊ |
91 | bb.eax.rr = funcGetSetPaletteFormat;␊ |
92 | bb.ebx.r.l = subfuncGet;␊ |
93 | bios(&bb);␊ |
94 | *format = bb.ebx.r.h;␊ |
95 | return(bb.eax.r.h);␊ |
96 | }␊ |
97 | ␊ |
98 | int setVBEDACFormat(unsigned char format)␊ |
99 | {␊ |
100 | bb.intno = 0x10;␊ |
101 | bb.eax.rr = funcGetSetPaletteFormat;␊ |
102 | bb.ebx.r.l = subfuncSet;␊ |
103 | bb.ebx.r.h = format;␊ |
104 | bios(&bb);␊ |
105 | return(bb.eax.r.h);␊ |
106 | }␊ |
107 | ␊ |
108 | /*␊ |
109 | * Default GTF parameter values.␊ |
110 | */␊ |
111 | #define kCellGranularity 8.0 // character cell granularity␊ |
112 | #define kMinVSyncPlusBP 550.0 // min VSync + BP interval (us)␊ |
113 | #define kMinFrontPorch 1.0 // minimum front porch in lines(V)/cells(H)␊ |
114 | #define kVSyncLines 3.0 // width of VSync in lines␊ |
115 | #define kHSyncWidth 8.0 // HSync as a percent of total line width␊ |
116 | #define kC 30.0 // C = (C'-J) * (K/256) + J␊ |
117 | #define kM 300.0 // M = K/256 * M'␊ |
118 | ␊ |
119 | int Round(double f)␊ |
120 | {␊ |
121 | ␉return (int)(f + 0.5);␊ |
122 | }␊ |
123 | ␊ |
124 | /*␊ |
125 | * from http://www.azillionmonkeys.com/qed/sqroot.html␊ |
126 | */␊ |
127 | ␊ |
128 | double Sqrt( double y )␊ |
129 | {␊ |
130 | ␉double x, z, tempf;␊ |
131 | ␉unsigned long *tfptr = ((unsigned long *)&tempf) + 1;␊ |
132 | ␉␊ |
133 | ␉tempf = y;␊ |
134 | ␉*tfptr = (0xbfcdd90a - *tfptr)>>1; /* estimate of 1/sqrt(y) */␊ |
135 | ␉x = tempf;␊ |
136 | ␉z = y*0.5; /* hoist out the “/2” */␊ |
137 | ␉x = (1.5*x) - (x*x)*(x*z); /* iteration formula */␊ |
138 | ␉x = (1.5*x) - (x*x)*(x*z);␊ |
139 | ␉x = (1.5*x) - (x*x)*(x*z);␊ |
140 | ␉x = (1.5*x) - (x*x)*(x*z);␊ |
141 | ␉x = (1.5*x) - (x*x)*(x*z);␊ |
142 | ␉return x*y;␊ |
143 | }␊ |
144 | ␊ |
145 | int generateCRTCTiming( unsigned short width,␊ |
146 | unsigned short height,␊ |
147 | unsigned long paramValue, ␊ |
148 | int paramType,␊ |
149 | VBECRTCInfoBlock * timing )␊ |
150 | {␊ |
151 | double h_period_est, h_freq, h_period, h_total_pixels, h_sync_pixels;␊ |
152 | double h_active_pixels, h_ideal_duty_cycle, h_blank_pixels, pixel_freq = 0;␊ |
153 | double v_sync_plus_bp = 0, v_total_lines = 0, v_field_rate_est, v_frame_rate = 0;␊ |
154 | const double h_pixels = (double) width;␊ |
155 | const double v_lines = (double) height;␊ |
156 | ␊ |
157 | enum {␊ |
158 | left_margin_pixels = 0,␊ |
159 | right_margin_pixels = 0,␊ |
160 | top_margin_lines = 0,␊ |
161 | bot_margin_lines = 0,␊ |
162 | interlace = 0␊ |
163 | };␊ |
164 | ␊ |
165 | // Total number of active pixels in image and both margins␊ |
166 | h_active_pixels = h_pixels + left_margin_pixels + right_margin_pixels;␊ |
167 | ␊ |
168 | if (paramType == kCRTCParamPixelClock)␊ |
169 | {␊ |
170 | // Pixel clock provided in MHz␊ |
171 | pixel_freq = (double) paramValue / 1000000;␊ |
172 | ␊ |
173 | // Ideal horizontal period from the blanking duty cycle equation␊ |
174 | h_period = ((kC - 100) + (Sqrt(((100 - kC) * (100 - kC)) + (0.4 * kM *␊ |
175 | (h_active_pixels + right_margin_pixels + left_margin_pixels) /␊ |
176 | pixel_freq)))) / 2.0 / kM * 1000;␊ |
177 | }␊ |
178 | else /* kCRTCParamRefreshRate */␊ |
179 | {␊ |
180 | double v_field_rate_in = (double) paramValue;␊ |
181 | ␊ |
182 | // Estimate the horizontal period␊ |
183 | h_period_est = ((1 / v_field_rate_in) - kMinVSyncPlusBP / 1000000) /␊ |
184 | (v_lines + (2 * top_margin_lines) + kMinFrontPorch + interlace) * ␊ |
185 | 1000000;␊ |
186 | ␊ |
187 | // Number of lines in Vsync + back porch␊ |
188 | v_sync_plus_bp = Round(kMinVSyncPlusBP / h_period_est);␊ |
189 | ␊ |
190 | // Total number of lines in Vetical field period␊ |
191 | v_total_lines = v_lines + top_margin_lines + bot_margin_lines +␊ |
192 | v_sync_plus_bp + interlace + kMinFrontPorch;␊ |
193 | ␊ |
194 | // Estimate the vertical field frequency␊ |
195 | v_field_rate_est = 1 / h_period_est / v_total_lines * 1000000;␊ |
196 | ␊ |
197 | // Find the actual horizontal period␊ |
198 | h_period = h_period_est / (v_field_rate_in / v_field_rate_est);␊ |
199 | ␊ |
200 | // Find the vertical frame rate (no interlace)␊ |
201 | v_frame_rate = 1 / h_period / v_total_lines * 1000000;␊ |
202 | }␊ |
203 | ␊ |
204 | // Ideal blanking duty cycle from the blanking duty cycle equation␊ |
205 | h_ideal_duty_cycle = kC - (kM * h_period / 1000);␊ |
206 | ␊ |
207 | // Number of pixels in the blanking time to the nearest double character cell␊ |
208 | h_blank_pixels = Round(h_active_pixels * h_ideal_duty_cycle /␊ |
209 | (100 - h_ideal_duty_cycle) / (2 * kCellGranularity)) *␊ |
210 | (2 * kCellGranularity);␊ |
211 | ␊ |
212 | // Total number of horizontal pixels␊ |
213 | h_total_pixels = h_active_pixels + h_blank_pixels;␊ |
214 | ␊ |
215 | if (paramType == kCRTCParamPixelClock)␊ |
216 | {␊ |
217 | // Horizontal frequency␊ |
218 | h_freq = pixel_freq / h_total_pixels * 1000;␊ |
219 | ␊ |
220 | // Number of lines in V sync + back porch␊ |
221 | v_sync_plus_bp = Round(kMinVSyncPlusBP * h_freq / 1000);␊ |
222 | ␊ |
223 | // Total number of lines in vertical field period␊ |
224 | v_total_lines = v_lines + top_margin_lines + bot_margin_lines +␊ |
225 | interlace + v_sync_plus_bp + kMinFrontPorch;␊ |
226 | ␊ |
227 | // Vertical frame frequency␊ |
228 | v_frame_rate = Round(h_freq / v_total_lines * 1000);␊ |
229 | }␊ |
230 | else␊ |
231 | {␊ |
232 | // Find pixel clock frequency␊ |
233 | pixel_freq = Round(h_total_pixels / h_period);␊ |
234 | }␊ |
235 | ␊ |
236 | h_sync_pixels = Round(h_total_pixels * kHSyncWidth / 100 / kCellGranularity) *␊ |
237 | kCellGranularity;␊ |
238 | ␊ |
239 | timing->HTotal = h_total_pixels;␊ |
240 | timing->HSyncStart = h_active_pixels + (h_blank_pixels / 2) - h_sync_pixels;␊ |
241 | timing->HSyncEnd = timing->HSyncStart + h_sync_pixels;␊ |
242 | timing->VTotal = v_total_lines;␊ |
243 | timing->VSyncStart = v_total_lines - v_sync_plus_bp;␊ |
244 | timing->VSyncEnd = timing->VSyncStart + kVSyncLines;␊ |
245 | timing->Flags = kCRTCNegativeHorizontalSync;␊ |
246 | timing->PixelClock = pixel_freq * 1000000;␊ |
247 | timing->RefreshRate = v_frame_rate * 100;␊ |
248 | ␊ |
249 | return 0;␊ |
250 | }␊ |
251 | ␊ |
252 | int setVBEMode(unsigned short mode, const VBECRTCInfoBlock * timing)␊ |
253 | {␊ |
254 | bb.intno = 0x10;␊ |
255 | bb.eax.rr = funcSetMode;␊ |
256 | bb.ebx.rr = mode;␊ |
257 | if (timing) {␊ |
258 | bb.es = SEG(timing);␊ |
259 | bb.edi.rr = OFF(timing);␊ |
260 | }␊ |
261 | bios(&bb);␊ |
262 | return(bb.eax.r.h);␊ |
263 | }␊ |
264 | ␊ |
265 | int setVBEPalette(void *palette)␊ |
266 | {␊ |
267 | bb.intno = 0x10;␊ |
268 | bb.eax.rr = funcGetSetPaletteData;␊ |
269 | bb.ebx.r.l = subfuncSet;␊ |
270 | bb.ecx.rr = 256;␊ |
271 | bb.edx.rr = 0;␊ |
272 | bb.es = SEG(palette);␊ |
273 | bb.edi.rr = OFF(palette);␊ |
274 | bios(&bb);␊ |
275 | return(bb.eax.r.h);␊ |
276 | }␊ |
277 | ␊ |
278 | int getVBEPalette(void *palette)␊ |
279 | {␊ |
280 | bb.intno = 0x10;␊ |
281 | bb.eax.rr = funcGetSetPaletteData;␊ |
282 | bb.ebx.r.l = subfuncGet;␊ |
283 | bb.ecx.rr = 256;␊ |
284 | bb.edx.rr = 0;␊ |
285 | bb.es = SEG(palette);␊ |
286 | bb.edi.rr = OFF(palette);␊ |
287 | bios(&bb);␊ |
288 | return(bb.eax.r.h);␊ |
289 | }␊ |
290 | ␊ |
291 | int getVBECurrentMode(unsigned short *mode)␊ |
292 | {␊ |
293 | bb.intno = 0x10;␊ |
294 | bb.eax.rr = funcGetCurrentMode;␊ |
295 | bios(&bb);␊ |
296 | *mode = bb.ebx.rr;␊ |
297 | return(bb.eax.r.h);␊ |
298 | }␊ |
299 | ␊ |
300 | int getVBEPixelClock(unsigned short mode, unsigned long * pixelClock)␊ |
301 | {␊ |
302 | bb.intno = 0x10;␊ |
303 | bb.eax.rr = funcGetSetPixelClock;␊ |
304 | bb.ebx.r.l = 0;␊ |
305 | bb.ecx.rx = *pixelClock;␊ |
306 | bb.edx.rr = mode;␊ |
307 | bios(&bb);␊ |
308 | *pixelClock = bb.ecx.rx;␊ |
309 | return(bb.eax.r.h);␊ |
310 | }␊ |
311 |