nios2: Build infrastructure

This patch adds Makefile and Kconfig files required for building a
nios2 kernel.

Signed-off-by: Ley Foon Tan <lftan@altera.com>

diff --git a/arch/nios2/Kconfig b/arch/nios2/Kconfig
new file mode 100644 (file)
index 0000000..8a4889d
--- /dev/null
+++ b/arch/nios2/Kconfig
@@ -0,0 +1,201 @@
+config NIOS2
+       def_bool y
+       select ARCH_WANT_OPTIONAL_GPIOLIB
+       select CLKSRC_OF
+       select GENERIC_ATOMIC64
+       select GENERIC_CLOCKEVENTS
+       select GENERIC_CPU_DEVICES
+       select GENERIC_IRQ_PROBE
+       select GENERIC_IRQ_SHOW
+       select HAVE_ARCH_TRACEHOOK
+       select IRQ_DOMAIN
+       select MODULES_USE_ELF_RELA
+       select OF
+       select OF_EARLY_FLATTREE
+       select SOC_BUS
+       select SPARSE_IRQ
+       select USB_ARCH_HAS_HCD if USB_SUPPORT
+
+config GENERIC_CSUM
+       def_bool y
+
+config GENERIC_HWEIGHT
+       def_bool y
+
+config GENERIC_CALIBRATE_DELAY
+       def_bool y
+
+config NO_IOPORT_MAP
+       def_bool y
+
+config HAS_DMA
+       def_bool y
+
+config FPU
+       def_bool n
+
+config SWAP
+       def_bool n
+
+config RWSEM_GENERIC_SPINLOCK
+       def_bool y
+
+config TRACE_IRQFLAGS_SUPPORT
+       def_bool n
+
+source "init/Kconfig"
+
+menu "Kernel features"
+
+source "kernel/Kconfig.preempt"
+
+source "kernel/Kconfig.freezer"
+
+source "kernel/Kconfig.hz"
+
+source "mm/Kconfig"
+
+config FORCE_MAX_ZONEORDER
+       int "Maximum zone order"
+       range 9 20
+       default "11"
+       help
+         The kernel memory allocator divides physically contiguous memory
+         blocks into "zones", where each zone is a power of two number of
+         pages.  This option selects the largest power of two that the kernel
+         keeps in the memory allocator.  If you need to allocate very large
+         blocks of physically contiguous memory, then you may need to
+         increase this value.
+
+         This config option is actually maximum order plus one. For example,
+         a value of 11 means that the largest free memory block is 2^10 pages.
+
+endmenu
+
+source "arch/nios2/platform/Kconfig.platform"
+
+menu "Processor type and features"
+
+config MMU
+       def_bool y
+
+config NIOS2_ALIGNMENT_TRAP
+       bool "Catch alignment trap"
+       default y
+       help
+         Nios II CPUs cannot fetch/store data which is not bus aligned,
+         i.e., a 2 or 4 byte fetch must start at an address divisible by
+         2 or 4. Any non-aligned load/store instructions will be trapped and
+         emulated in software if you say Y here, which has a performance
+         impact.
+
+comment "Boot options"
+
+config CMDLINE_BOOL
+       bool "Default bootloader kernel arguments"
+       default y
+
+config CMDLINE
+       string "Default kernel command string"
+       default ""
+       depends on CMDLINE_BOOL
+       help
+         On some platforms, there is currently no way for the boot loader to
+         pass arguments to the kernel. For these platforms, you can supply
+         some command-line options at build time by entering them here.  In
+         other cases you can specify kernel args so that you don't have
+         to set them up in board prom initialization routines.
+
+config CMDLINE_FORCE
+       bool "Force default kernel command string"
+       depends on CMDLINE_BOOL
+       help
+         Set this to have arguments from the default kernel command string
+         override those passed by the boot loader.
+
+config NIOS2_CMDLINE_IGNORE_DTB
+       bool "Ignore kernel command string from DTB"
+       depends on !CMDLINE_FORCE
+       default y
+       help
+         Set this to ignore the bootargs property from the devicetree's
+         chosen node and fall back to CMDLINE if nothing is passed.
+
+config NIOS2_PASS_CMDLINE
+       bool "Passed kernel command line from u-boot"
+       default n
+       help
+         Use bootargs env variable from u-boot for kernel command line.
+         will override "Default kernel command string".
+         Say N if you are unsure.
+
+endmenu
+
+menu "Advanced setup"
+
+config ADVANCED_OPTIONS
+       bool "Prompt for advanced kernel configuration options"
+       help
+
+comment "Default settings for advanced configuration options are used"
+       depends on !ADVANCED_OPTIONS
+
+config NIOS2_KERNEL_MMU_REGION_BASE_BOOL
+       bool "Set custom kernel MMU region base address"
+       depends on ADVANCED_OPTIONS
+       help
+         This option allows you to set the virtual address of the kernel MMU region.
+
+         Say N here unless you know what you are doing.
+
+config NIOS2_KERNEL_MMU_REGION_BASE
+       hex "Virtual base address of the kernel MMU region " if NIOS2_KERNEL_MMU_REGION_BASE_BOOL
+       default "0x80000000"
+       help
+         This option allows you to set the virtual base address of the kernel MMU region.
+
+config NIOS2_KERNEL_REGION_BASE_BOOL
+       bool "Set custom kernel region base address"
+       depends on ADVANCED_OPTIONS
+       help
+         This option allows you to set the virtual address of the kernel region.
+
+         Say N here unless you know what you are doing.
+
+config NIOS2_KERNEL_REGION_BASE
+       hex "Virtual base address of the kernel region " if NIOS2_KERNEL_REGION_BASE_BOOL
+       default "0xc0000000"
+
+config NIOS2_IO_REGION_BASE_BOOL
+       bool "Set custom I/O region base address"
+       depends on ADVANCED_OPTIONS
+       help
+         This option allows you to set the virtual address of the I/O region.
+
+         Say N here unless you know what you are doing.
+
+config NIOS2_IO_REGION_BASE
+       hex "Virtual base address of the I/O region" if NIOS2_IO_REGION_BASE_BOOL
+       default "0xe0000000"
+
+endmenu
+
+menu "Executable file formats"
+
+source "fs/Kconfig.binfmt"
+
+endmenu
+
+source "net/Kconfig"
+
+source "drivers/Kconfig"
+
+source "fs/Kconfig"
+
+source "arch/nios2/Kconfig.debug"
+
+source "security/Kconfig"
+
+source "crypto/Kconfig"
+
+source "lib/Kconfig"

diff --cc arch/nios2/Kconfig.debug
Simple merge

diff --cc arch/nios2/Makefile
Simple merge

diff --cc arch/nios2/boot/Makefile
Simple merge

diff --cc arch/nios2/boot/install.sh
Simple merge

diff --cc arch/nios2/configs/3c120_defconfig
Simple merge

diff --cc arch/nios2/include/asm/Kbuild
Simple merge

diff --cc arch/nios2/include/uapi/asm/Kbuild
Simple merge

diff --cc arch/nios2/kernel/Makefile
Simple merge

diff --cc arch/nios2/kernel/nios2_ksyms.c
Simple merge

diff --cc arch/nios2/kernel/vmlinux.lds.S
Simple merge

diff --cc arch/nios2/lib/Makefile
Simple merge

diff --cc arch/nios2/mm/Makefile
Simple merge

diff --cc arch/nios2/platform/Kconfig.platform
Simple merge

diff --cc arch/nios2/platform/Makefile
Simple merge