WebSVN – HelenOS – Blame – //trunk/kernel/genarch/src/drivers/ega/ega.c

Rev	Author	Line No.	Line
1	jermar	1	/*
2071	jermar	2	* Copyright (c) 2001-2004 Jakub Jermar
1	jermar	3	* All rights reserved.
		4	*
		5	* Redistribution and use in source and binary forms, with or without
		6	* modification, are permitted provided that the following conditions
		7	* are met:
		8	*
		9	* - Redistributions of source code must retain the above copyright
		10	* notice, this list of conditions and the following disclaimer.
		11	* - Redistributions in binary form must reproduce the above copyright
		12	* notice, this list of conditions and the following disclaimer in the
		13	* documentation and/or other materials provided with the distribution.
		14	* - The name of the author may not be used to endorse or promote products
		15	* derived from this software without specific prior written permission.
		16	*
		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
		19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
		20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
		21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
		22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
		26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*/
		28
3940	decky	29	/** @addtogroup genarch_drivers
1702	cejka	30	* @{
		31	*/
1754	jermar	32	/**
		33	* @file
		34	* @brief EGA driver.
1702	cejka	35	*/
		36
3779	jermar	37	#include <genarch/drivers/ega/ega.h>
1	jermar	38	#include <putchar.h>
		39	#include <mm/page.h>
755	jermar	40	#include <mm/as.h>
3751	svoboda	41	#include <mm/slab.h>
167	jermar	42	#include <arch/mm/page.h>
1	jermar	43	#include <synch/spinlock.h>
		44	#include <arch/types.h>
		45	#include <arch/asm.h>
195	vana	46	#include <memstr.h>
4223	decky	47	#include <string.h>
575	palkovsky	48	#include <console/chardev.h>
		49	#include <console/console.h>
1473	decky	50	#include <sysinfo/sysinfo.h>
2015	jermar	51	#include <ddi/ddi.h>
1	jermar	52
		53	/*
		54	* The EGA driver.
		55	* Simple and short. Function for displaying characters and "scrolling".
		56	*/
		57
623	jermar	58	SPINLOCK_INITIALIZE(egalock);
1780	jermar	59	static uint32_t ega_cursor;
		60	static uint8_t *videoram;
3751	svoboda	61	static uint8_t *backbuf;
3930	jermar	62	static ioport8_t *ega_base;
1	jermar	63
4093	decky	64	#define SPACE 0x20
4190	decky	65	#define STYLE 0x1e
		66	#define INVAL 0x17
3994	decky	67
4190	decky	68	#define EMPTY_CHAR ((STYLE << 8) \| SPACE)
575	palkovsky	69
4190	decky	70	static uint16_t ega_oem_glyph(const wchar_t ch)
		71	{
		72	if ((ch >= 0x0000) && (ch <= 0x007f))
		73	return ch;
		74
		75	if (ch == 0x00a0)
		76	return 255;
		77
		78	if (ch == 0x00a1)
		79	return 173;
		80
		81	if ((ch >= 0x00a2) && (ch <= 0x00a3))
		82	return (ch - 7);
		83
		84	if (ch == 0x00a5)
		85	return 157;
		86
		87	if (ch == 0x00aa)
		88	return 166;
		89
		90	if (ch == 0x00ab)
		91	return 174;
		92
		93	if (ch == 0x00ac)
		94	return 170;
		95
		96	if (ch == 0x00b0)
		97	return 248;
		98
		99	if (ch == 0x00b1)
		100	return 241;
		101
		102	if (ch == 0x00b2)
		103	return 253;
		104
		105	if (ch == 0x00b5)
		106	return 230;
		107
		108	if (ch == 0x00b7)
		109	return 250;
		110
		111	if (ch == 0x00ba)
		112	return 167;
		113
		114	if (ch == 0x00bb)
		115	return 175;
		116
		117	if (ch == 0x00bc)
		118	return 172;
		119
		120	if (ch == 0x00bd)
		121	return 171;
		122
		123	if (ch == 0x00bf)
		124	return 168;
		125
		126	if ((ch >= 0x00c4) && (ch <= 0x00c5))
		127	return (ch - 54);
		128
		129	if (ch == 0x00c6)
		130	return 146;
		131
		132	if (ch == 0x00c7)
		133	return 128;
		134
		135	if (ch == 0x00c9)
		136	return 144;
		137
		138	if (ch == 0x00d1)
		139	return 165;
		140
		141	if (ch == 0x00d6)
		142	return 153;
		143
		144	if (ch == 0x00dc)
		145	return 154;
		146
		147	if (ch == 0x00df)
		148	return 225;
		149
		150	if (ch == 0x00e0)
		151	return 133;
		152
		153	if (ch == 0x00e1)
		154	return 160;
		155
		156	if (ch == 0x00e2)
		157	return 131;
		158
		159	if (ch == 0x00e4)
		160	return 132;
		161
		162	if (ch == 0x00e5)
		163	return 134;
		164
		165	if (ch == 0x00e6)
		166	return 145;
		167
		168	if (ch == 0x00e7)
		169	return 135;
		170
		171	if (ch == 0x00e8)
		172	return 138;
		173
		174	if (ch == 0x00e9)
		175	return 130;
		176
		177	if ((ch >= 0x00ea) && (ch <= 0x00eb))
		178	return (ch - 98);
		179
		180	if (ch == 0x00ec)
		181	return 141;
		182
		183	if (ch == 0x00ed)
		184	return 161;
		185
		186	if (ch == 0x00ee)
		187	return 140;
		188
		189	if (ch == 0x00ef)
		190	return 139;
		191
		192	if (ch == 0x00f1)
		193	return 164;
		194
		195	if (ch == 0x00f2)
		196	return 149;
		197
		198	if (ch == 0x00f3)
		199	return 162;
		200
		201	if (ch == 0x00f4)
		202	return 147;
		203
		204	if (ch == 0x00f6)
		205	return 148;
		206
		207	if (ch == 0x00f7)
		208	return 246;
		209
		210	if (ch == 0x00f9)
		211	return 151;
		212
		213	if (ch == 0x00fa)
		214	return 163;
		215
		216	if (ch == 0x00fb)
		217	return 150;
		218
		219	if (ch == 0x00fc)
		220	return 129;
		221
		222	if (ch == 0x00ff)
		223	return 152;
		224
		225	if (ch == 0x0192)
		226	return 159;
		227
		228	if (ch == 0x0393)
		229	return 226;
		230
		231	if (ch == 0x0398)
		232	return 233;
		233
		234	if (ch == 0x03a3)
		235	return 228;
		236
		237	if (ch == 0x03a6)
		238	return 232;
		239
		240	if (ch == 0x03a9)
		241	return 234;
		242
		243	if (ch == 0x03b1)
		244	return 224;
		245
		246	if (ch == 0x03b4)
		247	return 235;
		248
		249	if (ch == 0x03b5)
		250	return 238;
		251
		252	if (ch == 0x03c0)
		253	return 227;
		254
		255	if (ch == 0x03c3)
		256	return 229;
		257
		258	if (ch == 0x03c4)
		259	return 231;
		260
		261	if (ch == 0x03c6)
		262	return 237;
		263
		264	if (ch == 0x207f)
		265	return 252;
		266
		267	if (ch == 0x20a7)
		268	return 158;
		269
		270	if (ch == 0x2219)
		271	return 249;
		272
		273	if (ch == 0x221a)
		274	return 251;
		275
		276	if (ch == 0x221e)
		277	return 236;
		278
		279	if (ch == 0x2229)
		280	return 239;
		281
		282	if (ch == 0x2248)
		283	return 247;
		284
		285	if (ch == 0x2261)
		286	return 240;
		287
		288	if (ch == 0x2264)
		289	return 243;
		290
		291	if (ch == 0x2265)
		292	return 242;
		293
		294	if (ch == 0x2310)
		295	return 169;
		296
		297	if ((ch >= 0x2320) && (ch <= 0x2321))
		298	return (ch - 8748);
		299
		300	if (ch == 0x2500)
		301	return 196;
		302
		303	if (ch == 0x2502)
		304	return 179;
		305
		306	if (ch == 0x250c)
		307	return 218;
		308
		309	if (ch == 0x2510)
		310	return 191;
		311
		312	if (ch == 0x2514)
		313	return 192;
		314
		315	if (ch == 0x2518)
		316	return 217;
		317
		318	if (ch == 0x251c)
		319	return 195;
		320
		321	if (ch == 0x2524)
		322	return 180;
		323
		324	if (ch == 0x252c)
		325	return 194;
		326
		327	if (ch == 0x2534)
		328	return 193;
		329
		330	if (ch == 0x253c)
		331	return 197;
		332
		333	if (ch == 0x2550)
		334	return 205;
		335
		336	if (ch == 0x2551)
		337	return 186;
		338
		339	if ((ch >= 0x2552) && (ch <= 0x2553))
		340	return (ch - 9341);
		341
		342	if (ch == 0x2554)
		343	return 201;
		344
		345	if (ch == 0x2555)
		346	return 184;
		347
		348	if (ch == 0x2556)
		349	return 183;
		350
		351	if (ch == 0x2557)
		352	return 187;
		353
		354	if (ch == 0x2558)
		355	return 212;
		356
		357	if (ch == 0x2559)
		358	return 211;
		359
		360	if (ch == 0x255a)
		361	return 200;
		362
		363	if (ch == 0x255b)
		364	return 190;
		365
		366	if (ch == 0x255c)
		367	return 189;
		368
		369	if (ch == 0x255d)
		370	return 188;
		371
		372	if ((ch >= 0x255e) && (ch <= 0x255f))
		373	return (ch - 9368);
		374
		375	if (ch == 0x2560)
		376	return 204;
		377
		378	if ((ch >= 0x2561) && (ch <= 0x2562))
		379	return (ch - 9388);
		380
		381	if (ch == 0x2563)
		382	return 185;
		383
		384	if ((ch >= 0x2564) && (ch <= 0x2565))
		385	return (ch - 9363);
		386
		387	if (ch == 0x2566)
		388	return 203;
		389
		390	if ((ch >= 0x2567) && (ch <= 0x2568))
		391	return (ch - 9368);
		392
		393	if (ch == 0x2569)
		394	return 202;
		395
		396	if (ch == 0x256a)
		397	return 216;
		398
		399	if (ch == 0x256b)
		400	return 215;
		401
		402	if (ch == 0x256c)
		403	return 206;
		404
		405	if (ch == 0x2580)
		406	return 223;
		407
		408	if (ch == 0x2584)
		409	return 220;
		410
		411	if (ch == 0x2588)
		412	return 219;
		413
		414	if (ch == 0x258c)
		415	return 221;
		416
		417	if (ch == 0x2590)
		418	return 222;
		419
		420	if ((ch >= 0x2591) && (ch <= 0x2593))
		421	return (ch - 9441);
		422
		423	return 256;
		424	}
		425
1	jermar	426	/*
		427	* This function takes care of scrolling.
		428	*/
452	decky	429	static void ega_check_cursor(void)
1	jermar	430	{
3940	decky	431	if (ega_cursor < EGA_SCREEN)
125	jermar	432	return;
3994	decky	433
3940	decky	434	memmove((void ) videoram, (void ) (videoram + EGA_COLS * 2),
		435	(EGA_SCREEN - EGA_COLS) * 2);
		436	memmove((void ) backbuf, (void ) (backbuf + EGA_COLS * 2),
		437	(EGA_SCREEN - EGA_COLS) * 2);
3994	decky	438	memsetw(videoram + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR);
		439	memsetw(backbuf + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR);
3940	decky	440	ega_cursor = ega_cursor - EGA_COLS;
1	jermar	441	}
		442
3975	decky	443	static void ega_show_cursor(void)
		444	{
		445	pio_write_8(ega_base + EGA_INDEX_REG, 0x0a);
		446	uint8_t stat = pio_read_8(ega_base + EGA_DATA_REG);
		447	pio_write_8(ega_base + EGA_INDEX_REG, 0x0a);
		448	pio_write_8(ega_base + EGA_DATA_REG, stat & (~(1 << 5)));
		449	}
		450
3844	decky	451	static void ega_move_cursor(void)
1	jermar	452	{
3975	decky	453	pio_write_8(ega_base + EGA_INDEX_REG, 0x0e);
3902	jermar	454	pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff));
3975	decky	455	pio_write_8(ega_base + EGA_INDEX_REG, 0x0f);
3940	decky	456	pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff));
3844	decky	457	}
		458
3975	decky	459	static void ega_sync_cursor(void)
		460	{
		461	pio_write_8(ega_base + EGA_INDEX_REG, 0x0e);
		462	uint8_t hi = pio_read_8(ega_base + EGA_DATA_REG);
		463	pio_write_8(ega_base + EGA_INDEX_REG, 0x0f);
		464	uint8_t lo = pio_read_8(ega_base + EGA_DATA_REG);
		465
		466	ega_cursor = (hi << 8) \| lo;
3994	decky	467
		468	if (ega_cursor >= EGA_SCREEN)
		469	ega_cursor = 0;
		470
3975	decky	471	if ((ega_cursor % EGA_COLS) != 0)
		472	ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS;
		473
3994	decky	474	memsetw(videoram + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR);
		475	memsetw(backbuf + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR);
		476
3975	decky	477	ega_check_cursor();
		478	ega_move_cursor();
		479	ega_show_cursor();
		480	}
		481
4190	decky	482	static void ega_display_char(wchar_t ch, bool silent)
3844	decky	483	{
4190	decky	484	uint16_t index = ega_oem_glyph(ch);
		485	uint8_t glyph;
		486	uint8_t style;
3844	decky	487
4190	decky	488	if ((index >> 8)) {
4223	decky	489	glyph = U_SPECIAL;
4190	decky	490	style = INVAL;
		491	} else {
		492	glyph = index & 0xff;
		493	style = STYLE;
		494	}
		495
		496	backbuf[ega_cursor * 2] = glyph;
		497	backbuf[ega_cursor * 2 + 1] = style;
		498
4093	decky	499	if (!silent) {
4190	decky	500	videoram[ega_cursor * 2] = glyph;
		501	videoram[ega_cursor * 2 + 1] = style;
4093	decky	502	}
3844	decky	503	}
		504
4177	decky	505	static void ega_putchar(outdev_t *dev __attribute__((unused)), wchar_t ch, bool silent)
3844	decky	506	{
413	jermar	507	ipl_t ipl;
3844	decky	508
413	jermar	509	ipl = interrupts_disable();
1	jermar	510	spinlock_lock(&egalock);
3844	decky	511
1	jermar	512	switch (ch) {
2065	jermar	513	case '\n':
3940	decky	514	ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS;
2065	jermar	515	break;
		516	case '\t':
		517	ega_cursor = (ega_cursor + 8) - ega_cursor % 8;
4190	decky	518	break;
2065	jermar	519	case '\b':
3940	decky	520	if (ega_cursor % EGA_COLS)
2065	jermar	521	ega_cursor--;
		522	break;
		523	default:
3844	decky	524	ega_display_char(ch, silent);
2065	jermar	525	ega_cursor++;
		526	break;
1473	decky	527	}
1	jermar	528	ega_check_cursor();
3844	decky	529
		530	if (!silent)
		531	ega_move_cursor();
		532
1	jermar	533	spinlock_unlock(&egalock);
413	jermar	534	interrupts_restore(ipl);
1	jermar	535	}
		536
4093	decky	537	static outdev_t ega_console;
		538	static outdev_operations_t ega_ops = {
3844	decky	539	.write = ega_putchar
		540	};
		541
3930	jermar	542	void ega_init(ioport8_t *base, uintptr_t videoram_phys)
1	jermar	543	{
3940	decky	544	/* Initialize the software structure. */
3844	decky	545	ega_base = base;
		546
3940	decky	547	backbuf = (uint8_t *) malloc(EGA_VRAM_SIZE, 0);
3844	decky	548	if (!backbuf)
		549	panic("Unable to allocate backbuffer.");
		550
3940	decky	551	videoram = (uint8_t *) hw_map(videoram_phys, EGA_VRAM_SIZE);
3844	decky	552
3975	decky	553	/* Synchronize the back buffer and cursor position. */
		554	memcpy(backbuf, videoram, EGA_VRAM_SIZE);
		555	ega_sync_cursor();
3844	decky	556
4093	decky	557	outdev_initialize("ega", &ega_console, &ega_ops);
3844	decky	558	stdout = &ega_console;
		559
		560	sysinfo_set_item_val("fb", NULL, true);
		561	sysinfo_set_item_val("fb.kind", NULL, 2);
3940	decky	562	sysinfo_set_item_val("fb.width", NULL, EGA_COLS);
		563	sysinfo_set_item_val("fb.height", NULL, EGA_ROWS);
3844	decky	564	sysinfo_set_item_val("fb.blinking", NULL, true);
		565	sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys);
1	jermar	566	}
1702	cejka	567
3751	svoboda	568	void ega_redraw(void)
		569	{
3940	decky	570	memcpy(videoram, backbuf, EGA_VRAM_SIZE);
3751	svoboda	571	ega_move_cursor();
3975	decky	572	ega_show_cursor();
3751	svoboda	573	}
		574
1754	jermar	575	/** @}
1702	cejka	576	*/

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(root)//trunk/kernel/genarch/src/drivers/ega/ega.c – Rev 4223