MIPS: fix endianess handling

Make endianess of target CPU configurable. Use the new config
option for dbau1550_el and pb1000 boards.

Adapt linking of standalone applications to pass through
endianess options to LD.

Build tested with:
 - ELDK 4 mips_4KC- and mips4KCle
 - Sourcery CodeBench Lite 2011.03-93

With this patch all 26 MIPS boards can be compiled now in one step by
running "MAKEALL -a mips".

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>

diff --git a/README b/README
index c98afa74b18f68a866a4283bc5c0785374e6fd3f..9702067174e361eb94383839e984d9ae6df4075c 100644 (file)
--- a/README
+++ b/README
@@ -374,6 +374,12 @@ The following options need to be configured:
                Defines the string to utilize when trying to match PCIe device
                tree nodes for the given platform.
 
                Defines the string to utilize when trying to match PCIe device
                tree nodes for the given platform.
 

+- Generic CPU options:
+               CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN
+
+               Defines the endianess of the CPU. Implementation of those
+               values is arch specific.
+

 - Intel Monahans options:
                CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO
 
 - Intel Monahans options:
                CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO
 

diff --git a/arch/mips/cpu/mips32/config.mk b/arch/mips/cpu/mips32/config.mk
index 4d1b27379d8973e05352ab472d0ece07e20a5582..a1cd590a00414c5f368af190103882440fbdd971 100644 (file)
--- a/arch/mips/cpu/mips32/config.mk
+++ b/arch/mips/cpu/mips32/config.mk
@@ -27,14 +27,23 @@
 # Note: Toolchains with binutils prior to v2.16
 # are no longer supported by U-Boot MIPS tree!
 #
 # Note: Toolchains with binutils prior to v2.16
 # are no longer supported by U-Boot MIPS tree!
 #

-MIPSFLAGS = -march=mips32r2
+MIPSFLAGS := -march=mips32r2

 
 

+# Handle special prefix in ELDK 4.0 toolchain

 ifneq (,$(findstring 4KCle,$(CROSS_COMPILE)))
 ifneq (,$(findstring 4KCle,$(CROSS_COMPILE)))

-ENDIANNESS = -EL
-else
-ENDIANNESS = -EB
+ENDIANNESS := -EL

 endif
 
 endif
 

-MIPSFLAGS += $(ENDIANNESS)
+ifdef CONFIG_SYS_LITTLE_ENDIAN
+ENDIANNESS := -EL
+endif
+
+ifdef CONFIG_SYS_BIG_ENDIAN
+ENDIANNESS := -EB
+endif
+
+# Default to EB if no endianess is configured
+ENDIANNESS ?= -EB

 
 

-PLATFORM_CPPFLAGS += $(MIPSFLAGS)
+PLATFORM_CPPFLAGS += $(MIPSFLAGS) $(ENDIANNESS)
+PLATFORM_LDFLAGS += $(ENDIANNESS)

diff --git a/boards.cfg b/boards.cfg
index c6090bab90010ba76dd62a6c17e09c4acaf7bfd5..3cf75c3151b0c7be6c91405661c962c78002ca3c 100644 (file)
--- a/boards.cfg
+++ b/boards.cfg
@@ -360,7 +360,7 @@ dbau1000                     mips        mips32      dbau1x00            -
 dbau1100                     mips        mips32      dbau1x00            -              au1x00      dbau1x00:DBAU1100
 dbau1500                     mips        mips32      dbau1x00            -              au1x00      dbau1x00:DBAU1500
 dbau1550                     mips        mips32      dbau1x00            -              au1x00      dbau1x00:DBAU1550
 dbau1100                     mips        mips32      dbau1x00            -              au1x00      dbau1x00:DBAU1100
 dbau1500                     mips        mips32      dbau1x00            -              au1x00      dbau1x00:DBAU1500
 dbau1550                     mips        mips32      dbau1x00            -              au1x00      dbau1x00:DBAU1550

-dbau1550_el                  mips        mips32      dbau1x00            -              au1x00      dbau1x00:DBAU1550
+dbau1550_el                  mips        mips32      dbau1x00            -              au1x00      dbau1x00:DBAU1550,SYS_LITTLE_ENDIAN

 gth2                         mips        mips32      -                   -              au1x00
 pb1000                       mips        mips32      pb1x00              -              au1x00      pb1x00:PB1000
 incaip                       mips        mips32      incaip              -              incaip
 gth2                         mips        mips32      -                   -              au1x00
 pb1000                       mips        mips32      pb1x00              -              au1x00      pb1x00:PB1000
 incaip                       mips        mips32      incaip              -              incaip

diff --git a/include/configs/pb1x00.h b/include/configs/pb1x00.h
index eea8ed3adb09199cdb94b3cac081653cf87ab32d..d056884e7ebac620bc316f62cc4f70609119c83a 100644 (file)
--- a/include/configs/pb1x00.h
+++ b/include/configs/pb1x00.h
@@ -46,6 +46,8 @@
 #endif
 #endif
 
 #endif
 #endif
 

+#define CONFIG_SYS_LITTLE_ENDIAN
+

 #define CONFIG_ETHADDR         DE:AD:BE:EF:01:01    /* Ethernet address */
 
 #define CONFIG_BOOTDELAY       2       /* autoboot after 2 seconds     */
 #define CONFIG_ETHADDR         DE:AD:BE:EF:01:01    /* Ethernet address */
 
 #define CONFIG_BOOTDELAY       2       /* autoboot after 2 seconds     */