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
|
// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (c) 2017, Linaro Limited
*/
#include <compiler.h>
#include <console.h>
#include <drivers/cbmem_console.h>
#include <drivers/semihosting_console.h>
#include <drivers/ffa_console.h>
#include <drivers/serial.h>
#include <initcall.h>
#include <kernel/dt.h>
#include <kernel/dt_driver.h>
#include <kernel/panic.h>
#include <libfdt.h>
#include <stdlib.h>
#include <string.h>
#include <string_ext.h>
static struct serial_chip *serial_console __nex_bss;
/* May be overridden by platform */
__weak void plat_console_init(void)
{
}
void console_init(void)
{
if (IS_ENABLED(CFG_SEMIHOSTING_CONSOLE))
semihosting_console_init(CFG_SEMIHOSTING_CONSOLE_FILE);
else if (IS_ENABLED(CFG_FFA_CONSOLE))
ffa_console_init();
else
plat_console_init();
}
void __weak console_putc(int ch)
{
if (!serial_console)
return;
if (ch == '\n')
serial_console->ops->putc(serial_console, '\r');
serial_console->ops->putc(serial_console, ch);
}
void __weak console_flush(void)
{
if (!serial_console || !serial_console->ops->flush)
return;
serial_console->ops->flush(serial_console);
}
void register_serial_console(struct serial_chip *chip)
{
serial_console = chip;
}
#ifdef CFG_CONSOLE_RUNTIME_SET
static TEE_Result console_runtime_set(void)
{
if (CFG_CONSOLE_RUNTIME_LOG_LEVEL == TRACE_MIN)
IMSG("Disabling output console");
trace_set_level(CFG_CONSOLE_RUNTIME_LOG_LEVEL);
return TEE_SUCCESS;
}
boot_final(console_runtime_set);
#endif
#ifdef CFG_DT
static int find_chosen_node(void *fdt)
{
int offset = 0;
if (!fdt)
return -1;
offset = fdt_path_offset(fdt, "/secure-chosen");
if (offset < 0)
offset = fdt_path_offset(fdt, "/chosen");
return offset;
}
TEE_Result get_console_node_from_dt(void *fdt, int *offs_out,
char **path_out, char **params_out)
{
const struct fdt_property *prop;
const char *uart;
const char *parms = NULL;
int offs;
char *stdout_data;
char *p;
TEE_Result rc = TEE_ERROR_GENERIC;
/* Probe console from secure DT and fallback to non-secure DT */
offs = find_chosen_node(fdt);
if (offs < 0) {
DMSG("No console directive from DTB");
return TEE_ERROR_ITEM_NOT_FOUND;
}
prop = fdt_get_property(fdt, offs, "stdout-path", NULL);
if (!prop) {
/*
* A secure-chosen or chosen node is present but defined
* no stdout-path property: no console expected
*/
IMSG("Switching off console");
register_serial_console(NULL);
return TEE_ERROR_ITEM_NOT_FOUND;
}
stdout_data = nex_strdup(prop->data);
if (!stdout_data)
panic();
p = strchr(stdout_data, ':');
if (p) {
*p = '\0';
parms = p + 1;
}
/* stdout-path may refer to an alias */
uart = fdt_get_alias(fdt, stdout_data);
if (!uart) {
/* Not an alias, assume we have a node path */
uart = stdout_data;
}
offs = fdt_path_offset(fdt, uart);
if (offs >= 0) {
if (offs_out)
*offs_out = offs;
if (params_out)
*params_out = parms ? nex_strdup(parms) : NULL;
if (path_out)
*path_out = uart ? nex_strdup(uart) : NULL;
rc = TEE_SUCCESS;
}
nex_free(stdout_data);
return rc;
}
void configure_console_from_dt(void)
{
const struct dt_driver *dt_drv;
const struct serial_driver *sdrv;
struct serial_chip *dev;
char *uart = NULL;
char *parms = NULL;
void *fdt;
int offs;
fdt = get_dt();
if (IS_ENABLED(CFG_CBMEM_CONSOLE) && cbmem_console_init_from_dt(fdt))
return;
if (get_console_node_from_dt(fdt, &offs, &uart, &parms))
return;
dt_drv = dt_find_compatible_driver(fdt, offs);
if (!dt_drv || dt_drv->type != DT_DRIVER_UART)
goto out;
sdrv = (const struct serial_driver *)dt_drv->driver;
if (!sdrv)
goto out;
dev = sdrv->dev_alloc();
if (!dev)
goto out;
/*
* If the console is the same as the early console, dev_init() might
* clear pending data. Flush to avoid that.
*/
console_flush();
if (sdrv->dev_init(dev, fdt, offs, parms) < 0) {
sdrv->dev_free(dev);
goto out;
}
IMSG("Switching console to device: %s", uart);
register_serial_console(dev);
out:
nex_free(uart);
nex_free(parms);
}
#endif /* CFG_DT */
|
