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
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014 Google Inc
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; version 2 of
* the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include <arch/barrier.h>
#include <arch/cache.h>
#include <arch/io.h>
#include <arch/exception.h>
#include <arch/lib_helpers.h>
#include <arch/psci.h>
#include <arch/secmon.h>
#include <arch/smc.h>
#include <arch/startup.h>
#include <console/console.h>
#include <stddef.h>
#include "secmon.h"
static void secmon_init(struct secmon_params *params, int bsp);
static void secmon_init_bsp(void *arg)
{
secmon_init(arg, 1);
}
static void secmon_init_nonbsp(void *arg)
{
secmon_init(arg, 0);
}
/*
* This variable holds entry point for secmon init code. Once the stacks are
* setup by the stage_entry.S, it jumps to c_entry.
*/
void (*c_entry[2])(void *) = { &secmon_init_bsp, &secmon_init_nonbsp };
static void cpu_resume(void *unused)
{
psci_cpu_entry();
}
static void cpu_resume_init(void)
{
/* Change entry points into secmon. */
c_entry[0] = c_entry[1] = cpu_resume;
dcache_clean_by_mva(&c_entry, sizeof(c_entry));
/* Back up state. */
startup_save_cpu_data();
}
static void start_up_cpu(void *arg)
{
struct secmon_params *params = arg;
struct cpu_action *action;
if (cpu_is_bsp())
action = ¶ms->bsp;
else
action = ¶ms->secondary;
if (action->run == NULL)
psci_turn_off_self();
psci_turn_on_self(action);
}
static void cpu_init(int bsp)
{
struct cpu_info *ci = cpu_info();
ci->id = smp_processor_id();
cpu_mark_online(ci);
if (bsp)
cpu_set_bsp();
}
static void wait_for_all_cpus(size_t expected)
{
while (cpus_online() != expected)
;
}
static void secmon_init(struct secmon_params *params, int bsp)
{
struct cpu_action action = {
.run = start_up_cpu,
.arg = params,
};
exception_hwinit();
cpu_init(bsp);
if (!cpu_is_bsp())
secmon_wait_for_action();
/* Wait for all CPUs to enter secmon. */
wait_for_all_cpus(params->online_cpus);
smc_init();
psci_init((uintptr_t)arm64_cpu_startup_resume);
/* Initialize the resume path. */
cpu_resume_init();
/* Make sure all non-BSP CPUs take action before the BSP. */
arch_run_on_all_cpus_but_self_async(&action);
/* Turn on BSP. */
start_up_cpu(params);
printk(BIOS_ERR, "CPU turn on failed for BSP.\n");
secmon_wait_for_action();
}
void secmon_wait_for_action(void)
{
arch_cpu_wait_for_action();
}
|
