m1x: Add minimal boot banner

Signed-off-by: Ian Moffett <ian@mirocom.org>

src/m1x/Makefile

@@ -10,7 +10,7 @@ all: kern arch
 
 .PHONY: kern
 kern:
-	cd kern/; make $(PASSDOWN_ARGS)
+	cd kern/; make $(PASSDOWN_ARGS) ARCH_TARGET=$(ARCH_TARGET)
 
 .PHONY: arch
 arch:

src/m1x/kern/Makefile

@@ -19,7 +19,8 @@ CFLAGS = 					\
 	-I../include/			\
 	-I../foreign/flanterm/src	\
 	-DPRINTF_DISABLE_SUPPORT_PTRDIFF_T \
-	-DPRINTF_DISABLE_SUPPORT_FLOAT
+	-DPRINTF_DISABLE_SUPPORT_FLOAT		\
+	-D_M1X_ARCH="\"$(ARCH_TARGET)\""
 
 .PHONY: all
 all: $(OFILES)

src/m1x/kern/kern_init.c

@@ -4,14 +4,34 @@
  */
 
 #include <dev/cons/cons.h>
+#include <lib/printf.h>
 #include <hal/cpu.h>
 
+/* Kernel version */
+#define _M1X_VERSION "0.0.1"
+
+/*
+ * Display a boot banner on early start up
+ */
+static void
+banner(void)
+{
+    printf(
+        "booting m1x/%s v%s...\n",
+        _M1X_ARCH,
+        _M1X_VERSION
+    );
+}
+
 void
 kmain(void)
 {
     /* Initialize the console */
     cons_init();
 
+    /* Print the boot banner */
+    banner();
+
     /* Initialize the BSP */
     hal_cpu_init();