嵌入式系统移植 - Kernel : 添加客制化启动Log信息

说明

本次改动, 可以在内核启动时打印出客制化的log信息, 对于后续问题分析和溯回都有帮助. 效仿 Linux 添加:

1. 内核编译路径
2. 内核编译时间
3. 内核Git版本
4. 公司或个人信息
5. DTS文件名

效果图

修改源码

diff --git a/Makefile b/Makefile
old mode 100644
new mode 100755
index 3fdc0bf..8d394be
--- a/Makefile
+++ b/Makefile
@@ -50,6 +50,14 @@ ifndef KBUILD_VERBOSE
   KBUILD_VERBOSE = 0
 endif
 
+ifeq ("$(origin DTS)", "command line")
+  KBUILD_DTS = $(DTS)
+endif
+ifndef KBUILD_DTS
+  KBUILD_DTS = "UNKNOWN"
+endif
+export KBUILD_DTS
+
 # Call a source code checker (by default, "sparse") as part of the
 # C compilation.
 #
@@ -355,9 +363,10 @@ CHECK		= sparse
 
 # Use the wrapper for the compiler. This wrapper scans for new
 # warnings and causes the build to stop upon encountering them.
-ifneq ($(wildcard $(srctree)/scripts/gcc-wrapper.py),)
-CC		= $(srctree)/scripts/gcc-wrapper.py $(CROSS_COMPILE)gcc
-endif
+# Modify Tower 20181101, Remove compilation problems
+#ifneq ($(wildcard $(srctree)/scripts/gcc-wrapper.py),)
+#CC		= $(srctree)/scripts/gcc-wrapper.py $(CROSS_COMPILE)gcc
+#endif
 
 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
 		  -Wbitwise -Wno-return-void $(CF)

diff --git a/include/linux/printk.h b/include/linux/printk.h
old mode 100644
new mode 100755
index 708b8a8..ec7ffa5
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -8,6 +8,7 @@
 
 extern const char linux_banner[];
 extern const char linux_proc_banner[];
+extern const char sunchip_info[];
 
 static inline int printk_get_level(const char *buffer)
 {

diff --git a/init/Makefile b/init/Makefile
old mode 100644
new mode 100755
index 692b91f..2979efd
--- a/init/Makefile
+++ b/init/Makefile
@@ -30,4 +30,5 @@ silent_chk_compile.h = :
 include/generated/compile.h: FORCE
 	@$($(quiet)chk_compile.h)
 	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@ \
-	"$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" "$(CC) $(KBUILD_CFLAGS)"
+	"$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" "$(CC) $(KBUILD_CFLAGS)" \
+        "$(shell pwd)" "$(shell cd $(srctree) && git log  -1 --oneline | awk '{print $$1}')" "$(KBUILD_DTS)"

diff --git a/init/main.c b/init/main.c
old mode 100644
new mode 100755
index 2132ffd..54a98d4
--- a/init/main.c
+++ b/init/main.c
@@ -499,6 +499,7 @@ asmlinkage void __init start_kernel(void)
 	boot_cpu_init();
 	page_address_init();
 	pr_notice("%s", linux_banner);
+    pr_notice("%s", sunchip_info);
 	setup_arch(&command_line);
 	mm_init_owner(&init_mm, &init_task);
 	mm_init_cpumask(&init_mm);
@@ -889,6 +890,7 @@ static noinline void __init kernel_init_freeable(void)
 	if (sys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0)
 		pr_err("Warning: unable to open an initial console.\n");
 
+	pr_err("iFinelio Tower!");
 	(void) sys_dup(0);
 	(void) sys_dup(0);
 	/*

diff --git a/init/version.c b/init/version.c
old mode 100644
new mode 100755
index 1a4718e..d0e047e
--- a/init/version.c
+++ b/init/version.c
@@ -48,3 +48,7 @@ const char linux_proc_banner[] =
 	"%s version %s"
 	" (" LINUX_COMPILE_BY "@" LINUX_COMPILE_HOST ")"
 	" (" LINUX_COMPILER ") %s\n";
+
+// Modify Tower 20190123
+const char sunchip_info[] =
+        "Sunchip version " SUNCHIP_INFO " - " SUNCHIP_DTS "\n";

diff --git a/scripts/mkcompile_h b/scripts/mkcompile_h
index f221ddf..a2518aa 100755
--- a/scripts/mkcompile_h
+++ b/scripts/mkcompile_h
@@ -59,6 +59,28 @@ if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
 if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi
 UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP"
 
+# Modify Tower 20190114, add compile info
+LOCAL_DIR=$6
+LOCAL_GIT=$7
+LOCAL_DTS=$8
+if [ -z "$LOCAL_DIR" ]; then
+	SUNCHIP_INFO="(dir@UNKNOWN)"
+else
+	SUNCHIP_INFO="(dir@$LOCAL_DIR)"
+fi
+
+if [ -z "$LOCAL_GIT" ]; then
+	SUNCHIP_INFO+=" #UNKNOWN"
+else
+	SUNCHIP_INFO+=" #$LOCAL_GIT"
+fi
+
+if [ -z "$LOCAL_DTS" ]; then
+    SUNCHIP_DTS=" (DTS@UNKNON)"
+else
+    SUNCHIP_DTS=" (DTS@$LOCAL_DTS)"
+fi
+
 # Truncate to maximum length
 
 UTS_LEN=64
@@ -77,6 +99,10 @@ UTS_TRUNCATE="cut -b -$UTS_LEN"
   echo \#define LINUX_COMPILE_HOST \"`echo $LINUX_COMPILE_HOST | $UTS_TRUNCATE`\"
 
   echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | tail -n 1`\"
+
+  
+  echo \#define SUNCHIP_DTS \"`echo $SUNCHIP_DTS`\"
+  echo \#define SUNCHIP_INFO \"`echo $SUNCHIP_INFO`\"
 ) > .tmpcompile
 
 # Only replace the real compile.h if the new one is different,