[U-Boot] [PATCH 5/5] Warn when the machine ID isn't passed to an ARM kernel and u-boot is compiled in debug mode. The kernel cannot boot without it.

[Christopher Harvey <charvey@matrox.com>]

Signed-off-by: Christopher Harvey <charvey@matrox.com>
---
 arch/arm/lib/board.c |    4 ++++
 arch/arm/lib/bootm.c |    6 ++++++
 2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/arch/arm/lib/board.c b/arch/arm/lib/board.c
index 169dfeb..dbb835a 100644
--- a/arch/arm/lib/board.c
+++ b/arch/arm/lib/board.c
@@ -404,6 +404,10 @@ void board_init_f (ulong bootflag)
 	post_bootmode_init();
 	post_run (NULL, POST_ROM | post_bootmode_get(0));
 #endif
+	/* 0xffffffff is used to mark is value as "unset".
+	   Hopefully there will never be this many machines. 
+	   Can't use 0 since 0 is already used as a mach-type. */
+	gd->bd->bi_arch_number = 0xffffffff; 
 
 	gd->bd->bi_baudrate = gd->baudrate;
 	/* Ram ist board specific, so move it to board code ... */
diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c
index 802e833..70b3b76 100644
--- a/arch/arm/lib/bootm.c
+++ b/arch/arm/lib/bootm.c
@@ -113,6 +113,12 @@ int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
 		printf ("Using machid 0x%x from environment\n", machid);
 	}
 
+#ifdef DEBUG
+	if(machid==0xffffffff) {
+	        debug("\nWarning: machid not set! Linux will not finish booting.\n\n");
+	}
+#endif
+
 	show_boot_progress (15);
 
 #ifdef CONFIG_OF_LIBFDT
-- 
1.7.3.4