Merge branch 'master' of git://git.denx.de/u-boot-mips

5 files changed, 156 insertions, 44 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 9b72bab..4991da2 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -4,6 +4,10 @@ menu "MIPS architecture"
 config SYS_ARCH
 	default "mips"
 
+config SYS_CPU
+	default "mips32" if CPU_MIPS32_R1 || CPU_MIPS32_R2
+	default "mips64" if CPU_MIPS64_R1 || CPU_MIPS64_R2
+
 config USE_PRIVATE_LIBGCC
 	default y
 
@@ -12,21 +16,39 @@ choice
 
 config TARGET_QEMU_MIPS
 	bool "Support qemu-mips"
+	select SUPPORTS_BIG_ENDIAN
+	select SUPPORTS_LITTLE_ENDIAN
+	select SUPPORTS_CPU_MIPS32_R1
+	select SUPPORTS_CPU_MIPS32_R2
+	select SUPPORTS_CPU_MIPS64_R1
+	select SUPPORTS_CPU_MIPS64_R2
 
 config TARGET_MALTA
 	bool "Support malta"
+	select SUPPORTS_BIG_ENDIAN
+	select SUPPORTS_LITTLE_ENDIAN
+	select SUPPORTS_CPU_MIPS32_R1
+	select SUPPORTS_CPU_MIPS32_R2
 
 config TARGET_VCT
 	bool "Support vct"
+	select SUPPORTS_BIG_ENDIAN
+	select SUPPORTS_CPU_MIPS32_R1
+	select SUPPORTS_CPU_MIPS32_R2
 
 config TARGET_DBAU1X00
 	bool "Support dbau1x00"
+	select SUPPORTS_BIG_ENDIAN
+	select SUPPORTS_LITTLE_ENDIAN
+	select SUPPORTS_CPU_MIPS32_R1
+	select SUPPORTS_CPU_MIPS32_R2
 
 config TARGET_PB1X00
 	bool "Support pb1x00"
+	select SUPPORTS_LITTLE_ENDIAN
+	select SUPPORTS_CPU_MIPS32_R1
+	select SUPPORTS_CPU_MIPS32_R2
 
-config TARGET_QEMU_MIPS64
-	bool "Support qemu-mips64"
 
 endchoice
 
@@ -36,4 +58,88 @@ source "board/micronas/vct/Kconfig"
 source "board/pb1x00/Kconfig"
 source "board/qemu-mips/Kconfig"
 
+if MIPS
+
+choice
+	prompt "Endianness selection"
+	help
+	  Some MIPS boards can be configured for either little or big endian
+	  byte order. These modes require different U-Boot images. In general there
+	  is one preferred byteorder for a particular system but some systems are
+	  just as commonly used in the one or the other endianness.
+
+config SYS_BIG_ENDIAN
+	bool "Big endian"
+	depends on SUPPORTS_BIG_ENDIAN
+
+config SYS_LITTLE_ENDIAN
+	bool "Little endian"
+	depends on SUPPORTS_LITTLE_ENDIAN
+
+endchoice
+
+choice
+	prompt "CPU selection"
+	default CPU_MIPS32_R2
+
+config CPU_MIPS32_R1
+	bool "MIPS32 Release 1"
+	depends on SUPPORTS_CPU_MIPS32_R1
+	select 32BIT
+	help
+	  Choose this option to build an U-Boot for release 1 or later of the
+	  MIPS32 architecture.
+
+config CPU_MIPS32_R2
+	bool "MIPS32 Release 2"
+	depends on SUPPORTS_CPU_MIPS32_R2
+	select 32BIT
+	help
+	  Choose this option to build an U-Boot for release 2 or later of the
+	  MIPS32 architecture.
+
+config CPU_MIPS64_R1
+	bool "MIPS64 Release 1"
+	depends on SUPPORTS_CPU_MIPS64_R1
+	select 64BIT
+	help
+	  Choose this option to build a kernel for release 1 or later of the
+	  MIPS64 architecture.
+
+config CPU_MIPS64_R2
+	bool "MIPS64 Release 2"
+	depends on SUPPORTS_CPU_MIPS64_R2
+	select 64BIT
+	help
+	  Choose this option to build a kernel for release 2 or later of the
+	  MIPS64 architecture.
+
+endchoice
+
+config SUPPORTS_BIG_ENDIAN
+	bool
+
+config SUPPORTS_LITTLE_ENDIAN
+	bool
+
+config SUPPORTS_CPU_MIPS32_R1
+	bool
+
+config SUPPORTS_CPU_MIPS32_R2
+	bool
+
+config SUPPORTS_CPU_MIPS64_R1
+	bool
+
+config SUPPORTS_CPU_MIPS64_R2
+	bool
+
+config 32BIT
+	bool
+
+config 64BIT
+	bool
+
+endif
+
 endmenu
diff --git a/arch/mips/config.mk b/arch/mips/config.mk
index a2d07af..4dc88f4 100644
--- a/arch/mips/config.mk
+++ b/arch/mips/config.mk
@@ -5,25 +5,41 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-ifeq ($(CROSS_COMPILE),)
-CROSS_COMPILE := mips_4KC-
+ifdef CONFIG_SYS_BIG_ENDIAN
+32bit-emul		:= elf32btsmip
+64bit-emul		:= elf64btsmip
+32bit-bfd		:= elf32-tradbigmips
+64bit-bfd		:= elf64-tradbigmips
+PLATFORM_CPPFLAGS	+= -EB
+PLATFORM_LDFLAGS	+= -EB
 endif
 
-# Handle special prefix in ELDK 4.0 toolchain
-ifneq (,$(findstring 4KCle,$(CROSS_COMPILE)))
-ENDIANNESS := -EL
+ifdef CONFIG_SYS_LITTLE_ENDIAN
+32bit-emul		:= elf32ltsmip
+64bit-emul		:= elf64ltsmip
+32bit-bfd		:= elf32-tradlittlemips
+64bit-bfd		:= elf64-tradlittlemips
+PLATFORM_CPPFLAGS	+= -EL
+PLATFORM_LDFLAGS	+= -EL
 endif
 
-ifdef CONFIG_SYS_LITTLE_ENDIAN
-ENDIANNESS := -EL
+ifdef CONFIG_32BIT
+PLATFORM_CPPFLAGS	+= -mabi=32
+PLATFORM_LDFLAGS	+= -m $(32bit-emul)
+OBJCOPYFLAGS		+= -O $(32bit-bfd)
 endif
 
-ifdef CONFIG_SYS_BIG_ENDIAN
-ENDIANNESS := -EB
+ifdef CONFIG_64BIT
+PLATFORM_CPPFLAGS	+= -mabi=64
+PLATFORM_LDFLAGS	+= -m$(64bit-emul)
+OBJCOPYFLAGS		+= -O $(64bit-bfd)
 endif
 
-# Default to EB if no endianess is configured
-ENDIANNESS ?= -EB
+cpuflags-$(CONFIG_CPU_MIPS32_R1) += -march=mips32 -Wa,-mips32
+cpuflags-$(CONFIG_CPU_MIPS32_R2) += -march=mips32r2 -Wa,-mips32r2
+cpuflags-$(CONFIG_CPU_MIPS64_R1) += -march=mips64 -Wa,-mips64
+cpuflags-$(CONFIG_CPU_MIPS64_R2) += -march=mips64r2 -Wa,-mips64r2
+PLATFORM_CPPFLAGS += $(cpuflags-y)
 
 PLATFORM_CPPFLAGS += -D__MIPS__
 
@@ -49,10 +65,10 @@ __HAVE_ARCH_GENERIC_BOARD := y
 # On the other hand, we want PIC in the U-Boot code to relocate it from ROM
 # to RAM. $28 is always used as gp.
 #
-PLATFORM_CPPFLAGS		+= -G 0 -mabicalls -fpic $(ENDIANNESS)
+PLATFORM_CPPFLAGS		+= -G 0 -mabicalls -fpic
 PLATFORM_CPPFLAGS		+= -msoft-float
-PLATFORM_LDFLAGS		+= -G 0 -static -n -nostdlib $(ENDIANNESS)
+PLATFORM_LDFLAGS		+= -G 0 -static -n -nostdlib
 PLATFORM_RELFLAGS		+= -ffunction-sections -fdata-sections
 LDFLAGS_FINAL			+= --gc-sections -pie
 OBJCOPYFLAGS			+= -j .text -j .rodata -j .data -j .got
-OBJCOPYFLAGS			+= -j .u_boot_list -j .rel.dyn
+OBJCOPYFLAGS			+= -j .u_boot_list -j .rel.dyn -j .padding
diff --git a/arch/mips/cpu/mips32/config.mk b/arch/mips/cpu/mips32/config.mk
index 332cd62..4257c56 100644
--- a/arch/mips/cpu/mips32/config.mk
+++ b/arch/mips/cpu/mips32/config.mk
@@ -5,19 +5,5 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-#
-# Default optimization level for MIPS32
-#
-# Note: Toolchains with binutils prior to v2.16
-# are no longer supported by U-Boot MIPS tree!
-#
-PLATFORM_CPPFLAGS += -DCONFIG_MIPS32 -march=mips32r2
-PLATFORM_CPPFLAGS += -mabi=32 -DCONFIG_32BIT
-ifdef CONFIG_SYS_BIG_ENDIAN
-PLATFORM_LDFLAGS  += -m elf32btsmip
-else
-PLATFORM_LDFLAGS  += -m elf32ltsmip
-endif
-
 CONFIG_STANDALONE_LOAD_ADDR ?= 0x80200000 \
 			       -T $(srctree)/examples/standalone/mips.lds
diff --git a/arch/mips/cpu/mips64/config.mk b/arch/mips/cpu/mips64/config.mk
index c55eb7f..96eb829 100644
--- a/arch/mips/cpu/mips64/config.mk
+++ b/arch/mips/cpu/mips64/config.mk
@@ -5,19 +5,5 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-#
-# Default optimization level for MIPS64
-#
-# Note: Toolchains with binutils prior to v2.16
-# are no longer supported by U-Boot MIPS tree!
-#
-PLATFORM_CPPFLAGS += -DCONFIG_MIPS64 -march=mips64
-PLATFORM_CPPFLAGS += -mabi=64 -DCONFIG_64BIT
-ifdef CONFIG_SYS_BIG_ENDIAN
-PLATFORM_LDFLAGS  += -m elf64btsmip
-else
-PLATFORM_LDFLAGS  += -m elf64ltsmip
-endif
-
 CONFIG_STANDALONE_LOAD_ADDR ?= 0xffffffff80200000 \
 			       -T $(srctree)/examples/standalone/mips64.lds
diff --git a/arch/mips/cpu/u-boot.lds b/arch/mips/cpu/u-boot.lds
index e504ea7..7d71c11 100644
--- a/arch/mips/cpu/u-boot.lds
+++ b/arch/mips/cpu/u-boot.lds
@@ -61,6 +61,24 @@ SECTIONS
 		__rel_dyn_end = .;
 	}
 
+	.padding : {
+		/*
+		 * Workaround for a binutils feature (or bug?).
+		 *
+		 * The GNU ld from binutils puts the dynamic relocation
+		 * entries into the .rel.dyn section. Sometimes it
+		 * allocates more dynamic relocation entries than it needs
+		 * and the unused slots are set to R_MIPS_NONE entries.
+		 *
+		 * However the size of the .rel.dyn section in the ELF
+		 * section header does not cover the unused entries, so
+		 * objcopy removes those during stripping.
+		 *
+		 * Create a small section here to avoid that.
+		 */
+		LONG(0xFFFFFFFF)
+	}
+
 	_end = .;
 
 	.bss __rel_dyn_start (OVERLAY) : {