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
|
From cf39fde2c1cfb55aa756bfb551c4087ba2fd4b6c Mon Sep 17 00:00:00 2001
From: Alexander Filippov <a.filippov@yadro.com>
Date: Tue, 7 Apr 2020 16:45:41 +0300
Subject: [PATCH] Add system reset status support
This is backport of patch file from intel-bmc/openbmc repository.
https://github.com/Intel-BMC/openbmc/blob/intel/meta-openbmc-mods/meta-common/recipes-bsp/u-boot/files/0020-Add-system-reset-status-support.patch
Will display the reset reasons in u-boot,
and save the reset reasons into kernel command line,
for applications to query.
Signed-off-by: Alexander Filippov <a.filippov@yadro.com>
---
arch/arm/include/asm/arch-aspeed/ast_g5_platform.h | 1 +
arch/arm/include/asm/arch-aspeed/ast_scu.h | 2 +-
arch/arm/mach-aspeed/ast-scu.c | 6 +-
board/aspeed/ast-g5/ast-g5.c | 98 ++++++++++++++++++++++
4 files changed, 105 insertions(+), 2 deletions(-)
diff --git a/arch/arm/include/asm/arch-aspeed/ast_g5_platform.h b/arch/arm/include/asm/arch-aspeed/ast_g5_platform.h
index 4210873..d2a4268cd 100644
--- a/arch/arm/include/asm/arch-aspeed/ast_g5_platform.h
+++ b/arch/arm/include/asm/arch-aspeed/ast_g5_platform.h
@@ -188,5 +188,6 @@
#define AST_FORMATTER_MEM_SIZE 0xC00000 /* 12MB */
#define AST_FORMATTER_MEM_BASE (AST_H264_MEM_BASE + AST_H264_MEM_SIZE)
+#define CONFIG_BOARD_LATE_INIT 1 /* Call board_late_init */
#endif
diff --git a/arch/arm/include/asm/arch-aspeed/ast_scu.h b/arch/arm/include/asm/arch-aspeed/ast_scu.h
index dcbc673..b428f38 100644
--- a/arch/arm/include/asm/arch-aspeed/ast_scu.h
+++ b/arch/arm/include/asm/arch-aspeed/ast_scu.h
@@ -29,7 +29,7 @@
#define __AST_SCU_H
extern void ast_scu_show_system_info (void);
-extern void ast_scu_sys_rest_info(void);
+extern u32 ast_scu_sys_rest_info(void);
extern void ast_scu_security_info(void);
extern u32 ast_scu_revision_id(void);
extern u32 ast_scu_get_vga_memsize(void);
diff --git a/arch/arm/mach-aspeed/ast-scu.c b/arch/arm/mach-aspeed/ast-scu.c
index 12de9b8..5afd379 100644
--- a/arch/arm/mach-aspeed/ast-scu.c
+++ b/arch/arm/mach-aspeed/ast-scu.c
@@ -482,22 +482,26 @@ void ast_scu_security_info(void)
}
}
-void ast_scu_sys_rest_info(void)
+u32 ast_scu_sys_rest_info(void)
{
u32 rest = ast_scu_read(AST_SCU_SYS_CTRL);
if (rest & SCU_SYS_EXT_RESET_FLAG) {
printf("RST : External\n");
ast_scu_write(SCU_SYS_EXT_RESET_FLAG, AST_SCU_SYS_CTRL);
+ rest = SCU_SYS_EXT_RESET_FLAG;
} else if (rest & SCU_SYS_WDT_RESET_FLAG) {
printf("RST : Watchdog\n");
ast_scu_write(SCU_SYS_WDT_RESET_FLAG, AST_SCU_SYS_CTRL);
+ rest = SCU_SYS_WDT_RESET_FLAG;
} else if (rest & SCU_SYS_PWR_RESET_FLAG) {
printf("RST : Power On\n");
ast_scu_write(SCU_SYS_PWR_RESET_FLAG, AST_SCU_SYS_CTRL);
+ rest = SCU_SYS_PWR_RESET_FLAG;
} else {
printf("RST : CLK en\n");
}
+ return rest;
}
u32 ast_scu_get_vga_memsize(void)
diff --git a/board/aspeed/ast-g5/ast-g5.c b/board/aspeed/ast-g5/ast-g5.c
index 12496ce..42d7496 100644
--- a/board/aspeed/ast-g5/ast-g5.c
+++ b/board/aspeed/ast-g5/ast-g5.c
@@ -105,3 +105,104 @@ void hw_watchdog_reset(void)
writel(0x4755, AST_WDT2_BASE + 0x08);
}
#endif /* CONFIG_WATCHDOG */
+
+#ifdef CONFIG_BOARD_LATE_INIT
+static void update_bootargs_cmd(const char *key, const char *value)
+{
+ int buf_len;
+ char *buf;
+ char *cmdline;
+ char *end = NULL;
+
+ if (!key || (key[0] == '\0'))
+ {
+ printf("%s: Empty key not allowed\n", __func__);
+ return;
+ }
+
+ cmdline = getenv("bootargs");
+
+ /* Allocate space for maximum possible new command line */
+ buf_len = (cmdline ? strlen(cmdline) : 0)
+ + 1 /* spacebar as delimiter */
+ + strlen(key)
+ + (value ? 1 /* equal sign */ + strlen(value) : 0)
+ + 1 /* terminating null */;
+
+ buf = calloc(buf_len, sizeof(char));
+ if (!buf)
+ {
+ printf("%s: out of memory\n", __func__);
+ return;
+ }
+
+ if (cmdline)
+ {
+ char *start = strstr(cmdline, key);
+
+ /* Check for full word match. Match should be start of cmdline
+ * or there should be space before match */
+ if (start && ((start == cmdline) || (*(start - 1) == ' ')))
+ {
+ strncat(buf, cmdline, (start - cmdline));
+
+ /* Find the end of the keyword[=value] pair,
+ * including a single training space character, if any.
+ * Skip the found substring, mark the tail of cmdline.
+ */
+ end = strchr(start, ' ');
+ if (end)
+ {
+ end++;
+ }
+ }
+ else
+ {
+ strcat(buf, cmdline);
+ strcat(buf, " ");
+ }
+ }
+
+ strcat(buf, key);
+ if (value)
+ {
+ strcat(buf, "=");
+ strcat(buf, value);
+ }
+
+ if (end)
+ {
+ strcat(buf, " ");
+ strcat(buf, end);
+ }
+
+ setenv("bootargs", buf);
+ free(buf);
+}
+
+int board_late_init(void)
+{
+ u32 reset_reason = ast_scu_sys_rest_info();
+
+ if (reset_reason & SCU_SYS_EXT_RESET_FLAG)
+ {
+ update_bootargs_cmd("resetreason", "external");
+ }
+ else if (reset_reason & SCU_SYS_WDT_RESET_FLAG)
+ {
+ update_bootargs_cmd("resetreason", "watchdog");
+ }
+ else if (reset_reason & SCU_SYS_PWR_RESET_FLAG)
+ {
+ update_bootargs_cmd("resetreason", "power");
+ }
+ else
+ {
+ char value[32];
+ snprintf(value, sizeof(value) - 1, "0x%x", reset_reason);
+ update_bootargs_cmd("resetreason", value);
+ }
+
+ return 0;
+}
+#endif /* CONFIG_BOARD_LATE_INIT */
|
