summaryrefslogtreecommitdiffstats
path: root/lib/efi_loader/efi_console.c
blob: 2e0228c3e036b5a61a47f9173e1fa0b7cc2bd742 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
/*
 *  EFI application console interface
 *
 *  Copyright (c) 2016 Alexander Graf
 *
 *  SPDX-License-Identifier:     GPL-2.0+
 */

#include <common.h>
#include <efi_loader.h>

/* If we can't determine the console size, default to 80x24 */
static int console_columns = 80;
static int console_rows = 24;
static bool console_size_queried;

const efi_guid_t efi_guid_console_control = CONSOLE_CONTROL_GUID;

#define cESC '\x1b'
#define ESC "\x1b"

static efi_status_t EFIAPI efi_cin_get_mode(
			struct efi_console_control_protocol *this,
			int *mode, char *uga_exists, char *std_in_locked)
{
	EFI_ENTRY("%p, %p, %p, %p", this, mode, uga_exists, std_in_locked);

	if (mode)
		*mode = EFI_CONSOLE_MODE_TEXT;
	if (uga_exists)
		*uga_exists = 0;
	if (std_in_locked)
		*std_in_locked = 0;

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_cin_set_mode(
			struct efi_console_control_protocol *this, int mode)
{
	EFI_ENTRY("%p, %d", this, mode);
	return EFI_EXIT(EFI_UNSUPPORTED);
}

static efi_status_t EFIAPI efi_cin_lock_std_in(
			struct efi_console_control_protocol *this,
			uint16_t *password)
{
	EFI_ENTRY("%p, %p", this, password);
	return EFI_EXIT(EFI_UNSUPPORTED);
}

const struct efi_console_control_protocol efi_console_control = {
	.get_mode = efi_cin_get_mode,
	.set_mode = efi_cin_set_mode,
	.lock_std_in = efi_cin_lock_std_in,
};

static struct simple_text_output_mode efi_con_mode = {
	.max_mode = 0,
	.mode = 0,
	.attribute = 0,
	.cursor_column = 0,
	.cursor_row = 0,
	.cursor_visible = 1,
};

static int term_read_reply(int *n, int maxnum, char end_char)
{
	char c;
	int i = 0;

	c = getc();
	if (c != cESC)
		return -1;
	c = getc();
	if (c != '[')
		return -1;

	n[0] = 0;
	while (1) {
		c = getc();
		if (c == ';') {
			i++;
			if (i >= maxnum)
				return -1;
			n[i] = 0;
			continue;
		} else if (c == end_char) {
			break;
		} else if (c > '9' || c < '0') {
			return -1;
		}

		/* Read one more decimal position */
		n[i] *= 10;
		n[i] += c - '0';
	}

	return 0;
}

static efi_status_t EFIAPI efi_cout_reset(
			struct efi_simple_text_output_protocol *this,
			char extended_verification)
{
	EFI_ENTRY("%p, %d", this, extended_verification);
	return EFI_EXIT(EFI_UNSUPPORTED);
}

static void print_unicode_in_utf8(u16 c)
{
	char utf8[4] = { 0 };
	char *b = utf8;

	if (c < 0x80) {
		*(b++) = c;
	} else if (c < 0x800) {
		*(b++) = 192 + c / 64;
		*(b++) = 128 + c % 64;
	} else {
		*(b++) = 224 + c / 4096;
		*(b++) = 128 + c / 64 % 64;
		*(b++) = 128 + c % 64;
	}

	puts(utf8);
}

static efi_status_t EFIAPI efi_cout_output_string(
			struct efi_simple_text_output_protocol *this,
			const unsigned short *string)
{
	u16 ch;

	EFI_ENTRY("%p, %p", this, string);
	for (;(ch = *string); string++) {
		print_unicode_in_utf8(ch);
		efi_con_mode.cursor_column++;
		if (ch == '\n') {
			efi_con_mode.cursor_column = 1;
			efi_con_mode.cursor_row++;
		} else if (efi_con_mode.cursor_column > console_columns) {
			efi_con_mode.cursor_column = 1;
			efi_con_mode.cursor_row++;
		}
		if (efi_con_mode.cursor_row > console_rows) {
			efi_con_mode.cursor_row = console_rows;
		}
	}

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_cout_test_string(
			struct efi_simple_text_output_protocol *this,
			const unsigned short *string)
{
	EFI_ENTRY("%p, %p", this, string);
	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_cout_query_mode(
			struct efi_simple_text_output_protocol *this,
			unsigned long mode_number, unsigned long *columns,
			unsigned long *rows)
{
	EFI_ENTRY("%p, %ld, %p, %p", this, mode_number, columns, rows);

	if (!console_size_queried) {
		/* Ask the terminal about its size */
		int n[3];
		u64 timeout;

		console_size_queried = true;

		/* Empty input buffer */
		while (tstc())
			getc();

		printf(ESC"[18t");

		/* Check if we have a terminal that understands */
		timeout = timer_get_us() + 1000000;
		while (!tstc())
			if (timer_get_us() > timeout)
				goto out;

		/* Read {depth,rows,cols} */
		if (term_read_reply(n, 3, 't')) {
			goto out;
		}

		console_columns = n[2];
		console_rows = n[1];
	}

out:
	if (columns)
		*columns = console_columns;
	if (rows)
		*rows = console_rows;

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_cout_set_mode(
			struct efi_simple_text_output_protocol *this,
			unsigned long mode_number)
{
	EFI_ENTRY("%p, %ld", this, mode_number);

	/* We only support text output for now */
	if (mode_number == EFI_CONSOLE_MODE_TEXT)
		return EFI_EXIT(EFI_SUCCESS);

	return EFI_EXIT(EFI_UNSUPPORTED);
}

static efi_status_t EFIAPI efi_cout_set_attribute(
			struct efi_simple_text_output_protocol *this,
			unsigned long attribute)
{
	EFI_ENTRY("%p, %lx", this, attribute);

	/* Just ignore attributes (colors) for now */
	return EFI_EXIT(EFI_UNSUPPORTED);
}

static efi_status_t EFIAPI efi_cout_clear_screen(
			struct efi_simple_text_output_protocol *this)
{
	EFI_ENTRY("%p", this);

	printf(ESC"[2J");

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_cout_set_cursor_position(
			struct efi_simple_text_output_protocol *this,
			unsigned long column, unsigned long row)
{
	EFI_ENTRY("%p, %ld, %ld", this, column, row);

	printf(ESC"[%d;%df", (int)row, (int)column);
	efi_con_mode.cursor_column = column;
	efi_con_mode.cursor_row = row;

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_cout_enable_cursor(
			struct efi_simple_text_output_protocol *this,
			bool enable)
{
	EFI_ENTRY("%p, %d", this, enable);

	printf(ESC"[?25%c", enable ? 'h' : 'l');

	return EFI_EXIT(EFI_SUCCESS);
}

const struct efi_simple_text_output_protocol efi_con_out = {
	.reset = efi_cout_reset,
	.output_string = efi_cout_output_string,
	.test_string = efi_cout_test_string,
	.query_mode = efi_cout_query_mode,
	.set_mode = efi_cout_set_mode,
	.set_attribute = efi_cout_set_attribute,
	.clear_screen = efi_cout_clear_screen,
	.set_cursor_position = efi_cout_set_cursor_position,
	.enable_cursor = efi_cout_enable_cursor,
	.mode = (void*)&efi_con_mode,
};

static efi_status_t EFIAPI efi_cin_reset(
			struct efi_simple_input_interface *this,
			bool extended_verification)
{
	EFI_ENTRY("%p, %d", this, extended_verification);
	return EFI_EXIT(EFI_UNSUPPORTED);
}

static efi_status_t EFIAPI efi_cin_read_key_stroke(
			struct efi_simple_input_interface *this,
			struct efi_input_key *key)
{
	struct efi_input_key pressed_key = {
		.scan_code = 0,
		.unicode_char = 0,
	};
	char ch;

	EFI_ENTRY("%p, %p", this, key);

	/* We don't do interrupts, so check for timers cooperatively */
	efi_timer_check();

	if (!tstc()) {
		/* No key pressed */
		return EFI_EXIT(EFI_NOT_READY);
	}

	ch = getc();
	if (ch == cESC) {
		/* Escape Sequence */
		ch = getc();
		switch (ch) {
		case cESC: /* ESC */
			pressed_key.scan_code = 23;
			break;
		case 'O': /* F1 - F4 */
			pressed_key.scan_code = getc() - 'P' + 11;
			break;
		case 'a'...'z':
			ch = ch - 'a';
			break;
		case '[':
			ch = getc();
			switch (ch) {
			case 'A'...'D': /* up, down right, left */
				pressed_key.scan_code = ch - 'A' + 1;
				break;
			case 'F': /* End */
				pressed_key.scan_code = 6;
				break;
			case 'H': /* Home */
				pressed_key.scan_code = 5;
				break;
			case '1': /* F5 - F8 */
				pressed_key.scan_code = getc() - '0' + 11;
				getc();
				break;
			case '2': /* F9 - F12 */
				pressed_key.scan_code = getc() - '0' + 19;
				getc();
				break;
			case '3': /* DEL */
				pressed_key.scan_code = 8;
				getc();
				break;
			}
			break;
		}
	} else if (ch == 0x7f) {
		/* Backspace */
		ch = 0x08;
	}
	pressed_key.unicode_char = ch;
	*key = pressed_key;

	return EFI_EXIT(EFI_SUCCESS);
}

const struct efi_simple_input_interface efi_con_in = {
	.reset = efi_cin_reset,
	.read_key_stroke = efi_cin_read_key_stroke,
	.wait_for_key = NULL,
};
OpenPOWER on IntegriCloud