[U-Boot] [PATCH V5 3/4] ARM: Warn when the machine ID isn't set.

[Christopher Harvey <charvey@matrox.com>]

Linux cannot boot without it.

Signed-off-by: Christopher Harvey <charvey@matrox.com>
---

V2:
Used a #define instead of a constant.
Used a printf instead of a debug.

---

V3:
Moved gd->bd->bi_arch_number = BI_ARCH_NUMBER_INVALID; before the 
  init_sequence loop, so it doesn't overwrite existing values.
Removed unneeded braces. 

Reminder, in V2 of this series there are 3 uncommited patches that
  have no comments.

---

V4:
Fixed mixed tabs and spaces.
Message prints in both debug and release mode. 

---

V5:

Rebase to bd061a5214e60c9d1bb24393933323bd1a2dae19

 arch/arm/include/asm/u-boot.h |    2 ++
 arch/arm/lib/board.c          |    3 +++
 arch/arm/lib/bootm.c          |    3 +++
 3 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/arch/arm/include/asm/u-boot.h b/arch/arm/include/asm/u-boot.h
index ed33327..81735de 100644
--- a/arch/arm/include/asm/u-boot.h
+++ b/arch/arm/include/asm/u-boot.h
@@ -48,4 +48,6 @@ typedef struct bd_info {
     }			bi_dram[CONFIG_NR_DRAM_BANKS];
 } bd_t;
 
+#define BI_ARCH_NUMBER_INVALID  0xffffffff
+
 #endif	/* _U_BOOT_H_ */
diff --git a/arch/arm/lib/board.c b/arch/arm/lib/board.c
index 14a56f6..58e901b 100644
--- a/arch/arm/lib/board.c
+++ b/arch/arm/lib/board.c
@@ -275,8 +275,11 @@ void board_init_f(ulong bootflag)
 
 	gd->mon_len = _bss_end_ofs;
 
+
 #ifdef CONFIG_MACH_TYPE
 	gd->bd->bi_arch_number = CONFIG_MACH_TYPE; /* board id for Linux */
+#else
+	gd->bd->bi_arch_number = BI_ARCH_NUMBER_INVALID;
 #endif
 
 	for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c
index 802e833..d5fd26b 100644
--- a/arch/arm/lib/bootm.c
+++ b/arch/arm/lib/bootm.c
@@ -113,6 +113,9 @@ int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
 		printf ("Using machid 0x%x from environment\n", machid);
 	}
 
+	if (machid == BI_ARCH_NUMBER_INVALID)
+		printf("Warning: machid not set.\n");
+
 	show_boot_progress (15);
 
 #ifdef CONFIG_OF_LIBFDT
-- 
1.7.4.5