linux-kernel - [PATCH v3 2/3] arch/microblaze: Add choice for endianness and update Makefile

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Message-Id: <1499358861-179979-3-git-send-email-babu.moger@oracle.com>
Date:   Thu,  6 Jul 2017 09:34:20 -0700
From:   Babu Moger <babu.moger@...cle.com>
To:     gregkh@...uxfoundation.org, ysato@...rs.sourceforge.jp,
        geert@...ux-m68k.org, jonas@...thpole.se,
        stefan.kristiansson@...nalahti.fi, shorne@...il.com,
        jejb@...isc-linux.org, deller@....de, davem@...emloft.net,
        viro@...iv.linux.org.uk, monstr@...str.eu
Cc:     mpe@...erman.id.au, peterz@...radead.org, mingo@...hat.com,
        jcmvbkbc@...il.com, linux-kernel@...r.kernel.org,
        uclinux-h8-devel@...ts.sourceforge.jp, linux-m68k@...r.kernel.org,
        openrisc@...ts.librecores.org, linux-parisc@...r.kernel.org,
        sparclinux@...r.kernel.org
Subject: [PATCH v3 2/3] arch/microblaze: Add choice for endianness and update Makefile

microblaze architectures can be configured for either little or
big endian formats. Add a choice option for the user to select the
correct endian format(default to big endian).

Also update the Makefile so toolchain can compile for the format
it is configured for.

Signed-off-by: Babu Moger <babu.moger@...cle.com>
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 arch/microblaze/Kconfig  |   16 ++++++++++++++++
 arch/microblaze/Makefile |    2 ++
 2 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 85885a5..74aa5de 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -35,6 +35,22 @@ config MICROBLAZE
 	select VIRT_TO_BUS
 	select CPU_NO_EFFICIENT_FFS
 
+# Endianness selection
+choice
+	prompt "Endianness selection"
+	default CPU_BIG_ENDIAN
+	help
+	  microblaze architectures can be configured for either little or
+	  big endian formats. Be sure to select the appropriate mode.
+
+config CPU_BIG_ENDIAN
+	bool "Big endian"
+
+config CPU_LITTLE_ENDIAN
+	bool "Little endian"
+
+endchoice
+
 config SWAP
 	def_bool n
 
diff --git a/arch/microblaze/Makefile b/arch/microblaze/Makefile
index 740f2b8..1f6c486 100644
--- a/arch/microblaze/Makefile
+++ b/arch/microblaze/Makefile
@@ -35,6 +35,8 @@ endif
 CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_DIV) += -mno-xl-soft-div
 CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_BARREL) += -mxl-barrel-shift
 CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR) += -mxl-pattern-compare
+CPUFLAGS-$(CONFIG_BIG_ENDIAN) += -mbig-endian
+CPUFLAGS-$(CONFIG_LITTLE_ENDIAN) += -mlittle-endian
 
 CPUFLAGS-1 += $(call cc-option,-mcpu=v$(CPU_VER))
 
-- 
1.7.1