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0774a6ed29
Almost all machines use GENERIC_CLOCKEVENTS, so it feels wrong to require each one to select that symbol manually. Instead, enable it whenever CONFIG_LEGACY_TIMER_TICK is disabled as a simplification. It should be possible to select both GENERIC_CLOCKEVENTS and LEGACY_TIMER_TICK from an architecture now and decide at runtime between the two. For the clockevents arch-support.txt file, this means that additional architectures are marked as TODO when they have at least one machine that still uses LEGACY_TIMER_TICK, rather than being marked 'ok' when at least one machine has been converted. This means that both m68k and arm (for riscpc) revert to TODO. At this point, we could just always enable CONFIG_GENERIC_CLOCKEVENTS rather than leaving it off when not needed. I built an m68k defconfig kernel (using gcc-10.1.0) and found that this would add around 5.5KB in kernel image size: text data bss dec hex filename 3861936 1092236 196656 5150828 4e986c obj-m68k/vmlinux-no-clockevent 3866201 1093832 196184 5156217 4ead79 obj-m68k/vmlinux-clockevent On Arm (MACH_RPC), that difference appears to be twice as large, around 11KB on top of an 6MB vmlinux. Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Tested-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
113 lines
3 KiB
Text
113 lines
3 KiB
Text
# SPDX-License-Identifier: GPL-2.0
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#
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# For a description of the syntax of this configuration file,
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# see Documentation/kbuild/kconfig-language.rst.
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#
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config C6X
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def_bool y
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select ARCH_32BIT_OFF_T
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select ARCH_HAS_BINFMT_FLAT
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select ARCH_HAS_SYNC_DMA_FOR_CPU
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select ARCH_HAS_SYNC_DMA_FOR_DEVICE
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select CLKDEV_LOOKUP
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select HAVE_LEGACY_CLK
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select GENERIC_ATOMIC64
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select GENERIC_IRQ_SHOW
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select HAVE_ARCH_TRACEHOOK
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select SPARSE_IRQ
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select IRQ_DOMAIN
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select OF
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select OF_EARLY_FLATTREE
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select MODULES_USE_ELF_RELA
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select MMU_GATHER_NO_RANGE if MMU
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select SET_FS
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config MMU
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def_bool n
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config FPU
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def_bool n
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config GENERIC_CALIBRATE_DELAY
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def_bool y
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config GENERIC_HWEIGHT
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def_bool y
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config GENERIC_BUG
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def_bool y
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depends on BUG
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config C6X_BIG_KERNEL
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bool "Build a big kernel"
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help
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The C6X function call instruction has a limited range of +/- 2MiB.
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This is sufficient for most kernels, but some kernel configurations
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with lots of compiled-in functionality may require a larger range
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for function calls. Use this option to have the compiler generate
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function calls with 32-bit range. This will make the kernel both
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larger and slower.
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If unsure, say N.
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# Use the generic interrupt handling code in kernel/irq/
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config CMDLINE_BOOL
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bool "Default bootloader kernel arguments"
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config CMDLINE
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string "Kernel command line"
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depends on CMDLINE_BOOL
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default "console=ttyS0,57600"
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help
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On some architectures there is currently no way for the boot loader
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to pass arguments to the kernel. For these architectures, you should
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supply some command-line options at build time by entering them
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here.
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config CMDLINE_FORCE
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bool "Force default kernel command string"
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depends on CMDLINE_BOOL
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default n
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help
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Set this to have arguments from the default kernel command string
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override those passed by the boot loader.
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config CPU_BIG_ENDIAN
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bool "Build big-endian kernel"
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default n
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help
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Say Y if you plan on running a kernel in big-endian mode.
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Note that your board must be properly built and your board
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port must properly enable any big-endian related features
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of your chipset/board/processor.
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config FORCE_MAX_ZONEORDER
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int "Maximum zone order"
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default "13"
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help
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The kernel memory allocator divides physically contiguous memory
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blocks into "zones", where each zone is a power of two number of
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pages. This option selects the largest power of two that the kernel
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keeps in the memory allocator. If you need to allocate very large
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blocks of physically contiguous memory, then you may need to
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increase this value.
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This config option is actually maximum order plus one. For example,
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a value of 11 means that the largest free memory block is 2^10 pages.
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menu "Processor type and features"
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source "arch/c6x/platforms/Kconfig"
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config KERNEL_RAM_BASE_ADDRESS
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hex "Virtual address of memory base"
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default 0xe0000000 if SOC_TMS320C6455
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default 0xe0000000 if SOC_TMS320C6457
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default 0xe0000000 if SOC_TMS320C6472
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default 0x80000000
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source "kernel/Kconfig.hz"
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endmenu
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