sandbox: Enable more console options

Enable the pre-console buffer, displaying the model and post-relocation
console announce on sandbox. Also add a model name to the device tree.
This allows testing of these features.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Stephen Warren <swarren@nvidia.com>

arch/sandbox/dts/sandbox.dts

@@ -5,6 +5,7 @@
 / {
 	#address-cells = <1>;
 	#size-cells = <1>;
+	model = "sandbox";
 
 	aliases {
 		eth5 = "/eth@90000000";

common/Kconfig

@@ -488,7 +488,7 @@ config DISPLAY_CPUINFO
 
 config DISPLAY_BOARDINFO
 	bool "Display information about the board during start up"
-	default y if ARM || M68K || MIPS || PPC || XTENSA
+	default y if ARM || M68K || MIPS || PPC || SANDBOX || XTENSA
 	help
 	  Display information about the board that U-Boot is running on
 	  when U-Boot starts up. The board function checkboard() is called

configs/sandbox_defconfig

@@ -14,6 +14,8 @@ CONFIG_BOOTSTAGE_STASH_SIZE=0x4096
 CONFIG_CONSOLE_RECORD=y
 CONFIG_CONSOLE_RECORD_OUT_SIZE=0x1000
 CONFIG_SILENT_CONSOLE=y
+CONFIG_PRE_CONSOLE_BUFFER=y
+CONFIG_PRE_CON_BUF_ADDR=0
 CONFIG_CMD_CPU=y
 CONFIG_CMD_LICENSE=y
 CONFIG_CMD_BOOTZ=y

include/configs/sandbox.h

@@ -41,6 +41,7 @@
 
 #define CONFIG_SYS_LONGHELP			/* #undef to save memory */
 #define CONFIG_SYS_CBSIZE		1024	/* Console I/O Buffer Size */
+#define CONFIG_DISPLAY_BOARDINFO_LATE
 
 /* Print Buffer Size */
 #define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + sizeof(CONFIG_SYS_PROMPT) + 16)