[PATCH V2 08/13] ARM: rpi_b: enable booting the Linux kernel

[Stephen Warren]

CONFIG_OF_LIBFDT allows bootm/bootz to pass a device tree to the kernel.

Set bi_boot_params to define where ATAGs will be written
(extracted from work by Oleksandr Tymoshenko <gonzo at bluezbox.com>).

Add ATAG support for bootm/bootz. Newer kernels use device tree, so this
isn't that useful. However, old kernels all use board files, so this
might still see some use.

Enable bootz command to allow booting a zImage directly.

Signed-off-by: Stephen Warren <swarren at wwwdotorg.org>
---
v2: Squashed the following commits into one:
  ARM: rpi_b: add ATAG support for bootm/bootz
  ARM: rpi_b: set bi_boot_params
  ARM: rpi_b: enable CONFIG_OF_LIBFDT
  ARM: rpi_b: enabled bootz command
---
 board/raspberrypi/rpi_b/rpi_b.c |    2 ++
 include/configs/rpi_b.h         |    8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/board/raspberrypi/rpi_b/rpi_b.c b/board/raspberrypi/rpi_b/rpi_b.c
index f39440f..26df74b 100644
--- a/board/raspberrypi/rpi_b/rpi_b.c
+++ b/board/raspberrypi/rpi_b/rpi_b.c
@@ -28,5 +28,7 @@ int dram_init(void)
 
 int board_init(void)
 {
+	gd->bd->bi_boot_params = 0x100;
+
 	return 0;
 }
diff --git a/include/configs/rpi_b.h b/include/configs/rpi_b.h
index f34cc03..9c96d0e 100644
--- a/include/configs/rpi_b.h
+++ b/include/configs/rpi_b.h
@@ -81,10 +81,18 @@
 
 /* Commands */
 #include <config_cmd_default.h>
+#define CONFIG_CMD_BOOTZ
 /* Some things don't make sense on this HW or yet */
 #undef CONFIG_CMD_FPGA
 #undef CONFIG_CMD_NET
 #undef CONFIG_CMD_NFS
 #undef CONFIG_CMD_SAVEENV
 
+/* Device tree support for bootm/bootz */
+#define CONFIG_OF_LIBFDT
+/* ATAGs support for bootm/bootz */
+#define CONFIG_SETUP_MEMORY_TAGS
+#define CONFIG_CMDLINE_TAG
+#define CONFIG_INITRD_TAG
+
 #endif
-- 
1.7.9.5