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Source at commit 1546 created 12 years 10 months ago. By blackosx, Added UseKernelCach=Yes boot option. Removed temporary .ChameleonEFI file. | |
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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 |