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
|
/* Copyright 2016 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "clock.h"
#include "common.h"
#include "console.h"
#include "cpu.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "interrupts.h"
#include "ish_fwst.h"
#include "ish_persistent_data.h"
#include "power_mgt.h"
#include "registers.h"
#include "shared_mem.h"
#include "spi.h"
#include "system.h"
#include "task.h"
#include "timer.h"
#include "util.h"
#define CPUTS(outstr) cputs(CC_SYSTEM, outstr)
#define CPRINTF(format, args...) cprintf(CC_SYSTEM, format, ## args)
#define CPRINTS(format, args...) cprints(CC_SYSTEM, format, ## args)
int system_is_reboot_warm(void)
{
return !(system_get_reset_flags() &
(EC_RESET_FLAG_POWER_ON | EC_RESET_FLAG_HARD));
}
void system_pre_init(void)
{
ish_fwst_set_fw_status(FWSTS_FW_IS_RUNNING);
if (IS_ENABLED(CONFIG_ISH_CLEAR_FABRIC_ERRORS))
task_enable_irq(ISH_FABRIC_IRQ);
ish_pm_init();
ish_persistent_data_init();
}
void chip_save_reset_flags(uint32_t flags)
{
ish_persistent_data.reset_flags = flags;
}
uint32_t chip_read_reset_flags(void)
{
return ish_persistent_data.reset_flags;
}
/*
* Kill the Minute-IA core and don't come back alive.
*
* Used when the watchdog timer exceeds max retries and we want to
* disable ISH completely.
*/
noreturn
static void system_halt(void)
{
cflush();
while (1) {
disable_all_interrupts();
WDT_CONTROL = 0;
CCU_TCG_EN = 1;
__asm__ volatile (
"cli\n"
"hlt\n");
}
}
void system_reset(int flags)
{
uint32_t save_flags;
/*
* We can't save any data when we do an ish_mia_reset(). Take
* the quick path out.
*/
if (!IS_ENABLED(CONFIG_ISH_PM_AONTASK) || flags & SYSTEM_RESET_HARD) {
ish_mia_reset();
__builtin_unreachable();
}
system_encode_save_flags(flags, &save_flags);
if (flags & SYSTEM_RESET_AP_WATCHDOG) {
save_flags |= EC_RESET_FLAG_WATCHDOG;
ish_persistent_data.watchdog_counter += 1;
if (ish_persistent_data.watchdog_counter
>= CONFIG_WATCHDOG_MAX_RETRIES) {
CPRINTS("Halting ISH due to max watchdog resets");
system_halt();
}
}
chip_save_reset_flags(save_flags);
ish_persistent_data_commit();
ish_pm_reset(ISH_PM_STATE_RESET);
__builtin_unreachable();
}
const char *system_get_chip_vendor(void)
{
return "intel";
}
const char *system_get_chip_name(void)
{
return "intel";
}
static char to_hex(int x)
{
if (x >= 0 && x <= 9)
return '0' + x;
return 'a' + x - 10;
}
const char *system_get_chip_revision(void)
{
static char buf[3];
uint8_t rev = 0x86;
buf[0] = to_hex(rev / 16);
buf[1] = to_hex(rev & 0xf);
buf[2] = '\0';
return buf;
}
int system_get_bbram(enum system_bbram_idx idx, uint8_t *value)
{
return EC_ERROR_UNIMPLEMENTED;
}
int system_set_bbram(enum system_bbram_idx idx, uint8_t value)
{
return EC_ERROR_UNIMPLEMENTED;
}
int system_set_scratchpad(uint32_t value)
{
return EC_SUCCESS;
}
int system_get_scratchpad(uint32_t *unused)
{
return EC_ERROR_UNIMPLEMENTED;
}
void system_hibernate(uint32_t seconds, uint32_t microseconds)
{
}
void htimer_interrupt(void)
{
/* Time to wake up */
}
enum ec_image system_get_shrspi_image_copy(void)
{
return 0;
}
uint32_t system_get_lfw_address(void)
{
return 0;
}
void system_set_image_copy(enum ec_image copy)
{
}
#define HBW_FABRIC_BASE 0x10000000
#define PER0_FABRIC_BASE 0x04000000
#define AGENT_STS 0x28
#define ERROR_LOG 0x58
static uint16_t hbw_ia_offset[] = {
0x1000,
0x3400,
0x3800,
0x5000,
0x5800,
0x6000
};
static inline void clear_register(uint32_t reg)
{
REG32(reg) = REG32(reg);
}
void clear_fabric_error(void)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(hbw_ia_offset); i++) {
clear_register(HBW_FABRIC_BASE + hbw_ia_offset[i] + AGENT_STS);
clear_register(HBW_FABRIC_BASE + hbw_ia_offset[i] + ERROR_LOG);
}
clear_register(PER0_FABRIC_BASE + 0x1000 + AGENT_STS);
clear_register(PER0_FABRIC_BASE + 0x1000 + ERROR_LOG);
}
static __maybe_unused void fabric_isr(void)
{
/**
* clear fabric error status, otherwise it will wakeup ISH immediately
* when entered low power mode.
* TODO(b:130740646): figure out why this issue happens.
*/
if (FABRIC_AGENT_STATUS & FABRIC_MIA_STATUS_BIT_ERR)
FABRIC_AGENT_STATUS = FABRIC_AGENT_STATUS;
}
#ifdef CONFIG_ISH_CLEAR_FABRIC_ERRORS
DECLARE_IRQ(ISH_FABRIC_IRQ, fabric_isr);
#endif
|
