arc: add selection of endianess in Kconfig

This change allows to keep board description clean and minimalistic.
This is especially helpful if one board may house different CPUs with
different features.

It is applicable to both FPGA-based boards or those that have CPUs
mounted on interchnagable daughter-boards.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

arch/arc/Kconfig

@@ -47,6 +47,12 @@ config ARC_MMU_V3
 
 endchoice
 
+config CPU_BIG_ENDIAN
+	bool "Enable Big Endian Mode"
+	default n
+	help
+	  Build kernel for Big Endian Mode of ARC CPU
+
 config SYS_ICACHE_OFF
 	bool "Do not use Instruction Cache"
 	default n
@@ -75,9 +81,6 @@ config TARGET_TB100
 config TARGET_ARCANGEL4
 	bool "Support arcangel4"
 
-config TARGET_ARCANGEL4_BE
-	bool "Support arcangel4-be"
-
 config TARGET_AXS101
 	bool "Support axs101"
 

arch/arc/config.mk

@@ -4,8 +4,10 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-ifndef CONFIG_SYS_BIG_ENDIAN
+ifndef CONFIG_CPU_BIG_ENDIAN
 CONFIG_SYS_LITTLE_ENDIAN = 1
+else
+CONFIG_SYS_BIG_ENDIAN = 1
 endif
 
 ifdef CONFIG_SYS_LITTLE_ENDIAN

board/synopsys/Kconfig

@@ -7,13 +7,3 @@ config SYS_CONFIG_NAME
 	default "arcangel4"
 
 endif
-
-if TARGET_ARCANGEL4_BE
-
-config SYS_VENDOR
-	default "synopsys"
-
-config SYS_CONFIG_NAME
-	default "arcangel4-be"
-
-endif

board/synopsys/MAINTAINERS

@@ -3,5 +3,4 @@ M:	Alexey Brodkin <abrodkin@synopsys.com>
 S:	Maintained
 F:	include/configs/arcangel4.h
 F:	configs/arcangel4_defconfig
-F:	include/configs/arcangel4-be.h
 F:	configs/arcangel4-be_defconfig

configs/arcangel4-be_defconfig

@@ -1,3 +1,4 @@
 CONFIG_ARC=y
-CONFIG_TARGET_ARCANGEL4_BE=y
+CONFIG_TARGET_ARCANGEL4=y
 CONFIG_SYS_CLK_FREQ=70000000
+CONFIG_CPU_BIG_ENDIAN=y

include/configs/arcangel4-be.h

@@ -1,88 +0,0 @@
-/*
- * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#ifndef _CONFIG_ARCANGEL4_H_
-#define _CONFIG_ARCANGEL4_H_
-
-/*
- *  CPU configuration
- */
-#define CONFIG_SYS_BIG_ENDIAN
-#define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
-
-/*
- * Board configuration
- */
-#define CONFIG_SYS_GENERIC_BOARD
-#define CONFIG_SKIP_LOWLEVEL_INIT	/* U-Boot is in RAM already */
-
-#define CONFIG_ARCH_EARLY_INIT_R
-
-/*
- * Memory configuration
- */
-#define CONFIG_SYS_TEXT_BASE		0x81000000
-#define CONFIG_SYS_MONITOR_BASE		CONFIG_SYS_TEXT_BASE
-
-#define CONFIG_SYS_DDR_SDRAM_BASE	0x80000000
-#define CONFIG_SYS_SDRAM_BASE		CONFIG_SYS_DDR_SDRAM_BASE
-#define CONFIG_SYS_SDRAM_SIZE		0x10000000	/* 256 Mb */
-
-#define CONFIG_SYS_INIT_SP_ADDR		\
-	(CONFIG_SYS_SDRAM_BASE + 0x1000 - GENERATED_GBL_DATA_SIZE)
-
-#define CONFIG_SYS_MALLOC_LEN		0x200000	/* 2 MB */
-#define CONFIG_SYS_BOOTM_LEN		0x2000000	/* 32 MB */
-#define CONFIG_SYS_LOAD_ADDR		0x82000000
-
-#define CONFIG_SYS_NO_FLASH
-
-/*
- * UART configuration
- *
- */
-#define CONFIG_ARC_SERIAL
-#define CONFIG_ARC_UART_BASE		0xC0FC1000
-#define CONFIG_BAUDRATE			115200
-
-/*
- * Command line configuration
- */
-#include <config_cmd_default.h>
-
-#define CONFIG_CMD_ELF
-
-#define CONFIG_OF_LIBFDT
-
-#define CONFIG_AUTO_COMPLETE
-#define CONFIG_SYS_MAXARGS		16
-
-/*
- * Environment settings
- */
-#define CONFIG_ENV_IS_NOWHERE
-#define CONFIG_ENV_SIZE			0x00200		/* 512 bytes */
-#define CONFIG_ENV_OFFSET		0
-
-/*
- * Environment configuration
- */
-#define CONFIG_BOOTDELAY		3
-#define CONFIG_BOOTFILE			"uImage"
-#define CONFIG_BOOTARGS			"console=ttyARC0,115200n8"
-#define CONFIG_LOADADDR			CONFIG_SYS_LOAD_ADDR
-
-/*
- * Console configuration
- */
-#define CONFIG_SYS_LONGHELP
-#define CONFIG_SYS_PROMPT		"arcangel4# "
-#define CONFIG_SYS_CBSIZE		256
-#define CONFIG_SYS_BARGSIZE		CONFIG_SYS_CBSIZE
-#define CONFIG_SYS_PBSIZE		(CONFIG_SYS_CBSIZE + \
-						sizeof(CONFIG_SYS_PROMPT) + 16)
-
-#endif /* _CONFIG_ARCANGEL4_H_ */