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
|
// SPDX-License-Identifier: GPL-2.0+
/*
* EFI efi_selftest
*
* Copyright (c) 2017 Heinrich Schuchardt <xypron.glpk@gmx.de>
*/
#include <efi_selftest.h>
#include <vsprintf.h>
struct efi_simple_text_output_protocol *con_out;
struct efi_simple_text_input_protocol *con_in;
/*
* Print a MAC address to an u16 string
*
* @pointer: mac address
* @buf: pointer to buffer address
* on return position of terminating zero word
*/
static void mac(void *pointer, u16 **buf)
{
int i, j;
u16 c;
u8 *p = (u8 *)pointer;
u8 byte;
u16 *pos = *buf;
for (i = 0; i < ARP_HLEN; ++i) {
if (i)
*pos++ = ':';
byte = p[i];
for (j = 4; j >= 0; j -= 4) {
c = (byte >> j) & 0x0f;
c += '0';
if (c > '9')
c += 'a' - '9' - 1;
*pos++ = c;
}
}
*pos = 0;
*buf = pos;
}
/*
* Print a pointer to an u16 string
*
* @pointer: pointer
* @buf: pointer to buffer address
* on return position of terminating zero word
*/
static void pointer(void *pointer, u16 **buf)
{
int i;
u16 c;
uintptr_t p = (uintptr_t)pointer;
u16 *pos = *buf;
for (i = 8 * sizeof(p) - 4; i >= 0; i -= 4) {
c = (p >> i) & 0x0f;
c += '0';
if (c > '9')
c += 'a' - '9' - 1;
*pos++ = c;
}
*pos = 0;
*buf = pos;
}
/*
* Print an unsigned 32bit value as decimal number to an u16 string
*
* @value: value to be printed
* @prec: minimum number of digits to display
* @buf: pointer to buffer address
* on return position of terminating zero word
*/
static void uint2dec(u32 value, int prec, u16 **buf)
{
u16 *pos = *buf;
int i;
u16 c;
u64 f;
/*
* Increment by .5 and multiply with
* (2 << 60) / 1,000,000,000 = 0x44B82FA0.9B5A52CC
* to move the first digit to bit 60-63.
*/
f = 0x225C17D0;
f += (0x9B5A52DULL * value) >> 28;
f += 0x44B82FA0ULL * value;
for (i = 0; i < 10; ++i) {
/* Write current digit */
c = f >> 60;
if (c || pos != *buf || 10 - i <= prec)
*pos++ = c + '0';
/* Eliminate current digit */
f &= 0xfffffffffffffff;
/* Get next digit */
f *= 0xaULL;
}
if (pos == *buf)
*pos++ = '0';
*pos = 0;
*buf = pos;
}
/*
* Print a signed 32bit value as decimal number to an u16 string
*
* @value: value to be printed
* @prec: minimum number of digits to display
* @buf: pointer to buffer address
* on return position of terminating zero word
*/
static void int2dec(s32 value, int prec, u16 **buf)
{
u32 u;
u16 *pos = *buf;
if (value < 0) {
*pos++ = '-';
u = -value;
} else {
u = value;
}
uint2dec(u, prec, &pos);
*buf = pos;
}
/*
* Print a colored formatted string to the EFI console
*
* @color color, see constants in efi_api.h, use -1 for no color
* @fmt format string
* @... optional arguments
*/
void efi_st_printc(int color, const char *fmt, ...)
{
va_list args;
u16 buf[160];
const char *c;
u16 *pos = buf;
const char *s;
u16 *u;
int prec;
va_start(args, fmt);
if (color >= 0)
con_out->set_attribute(con_out, (unsigned long)color);
c = fmt;
for (; *c; ++c) {
switch (*c) {
case '\\':
++c;
switch (*c) {
case '\0':
--c;
break;
case 'n':
*pos++ = '\n';
break;
case 'r':
*pos++ = '\r';
break;
case 't':
*pos++ = '\t';
break;
default:
*pos++ = *c;
}
break;
case '%':
++c;
/* Parse precision */
if (*c == '.') {
++c;
prec = *c - '0';
++c;
} else {
prec = 0;
}
switch (*c) {
case '\0':
--c;
break;
case 'd':
int2dec(va_arg(args, s32), prec, &pos);
break;
case 'p':
++c;
switch (*c) {
/* MAC address */
case 'm':
mac(va_arg(args, void*), &pos);
break;
/* u16 string */
case 's':
u = va_arg(args, u16*);
if (pos > buf) {
*pos = 0;
con_out->output_string(con_out,
buf);
}
con_out->output_string(con_out, u);
pos = buf;
break;
default:
--c;
pointer(va_arg(args, void*), &pos);
}
break;
case 's':
s = va_arg(args, const char *);
for (; *s; ++s)
*pos++ = *s;
break;
case 'u':
uint2dec(va_arg(args, u32), prec, &pos);
break;
default:
break;
}
break;
default:
*pos++ = *c;
}
}
va_end(args);
*pos = 0;
con_out->output_string(con_out, buf);
if (color >= 0)
con_out->set_attribute(con_out, EFI_LIGHTGRAY);
}
/*
* Reads an Unicode character from the input device.
*
* @return: Unicode character
*/
u16 efi_st_get_key(void)
{
struct efi_input_key input_key;
efi_status_t ret;
/* Wait for next key */
do {
ret = con_in->read_key_stroke(con_in, &input_key);
} while (ret == EFI_NOT_READY);
return input_key.unicode_char;
}
|
