arch/frv/Kconfig - kernel/msm-5.4 - Gitiles

 #
 # For a description of the syntax of this configuration file,
 # see Documentation/kbuild/kconfig-language.txt.
 #
 config FRV
 	bool
 	default y

 config RWSEM_GENERIC_SPINLOCK
 	bool
 	default y

 config RWSEM_XCHGADD_ALGORITHM
 	bool

 config GENERIC_FIND_NEXT_BIT
 	bool
 	default y

 config GENERIC_CALIBRATE_DELAY
 	bool
 	default n

 config GENERIC_HARDIRQS
 	bool
 	default n

 config TIME_LOW_RES
 	bool
 	default y

 mainmenu "Fujitsu FR-V Kernel Configuration"

 source "init/Kconfig"


 menu "Fujitsu FR-V system setup"

 config MMU
 	bool "MMU support"
 	help
 	  This options switches on and off support for the FR-V MMU
 	  (effectively switching between vmlinux and uClinux). Not all FR-V
 	  CPUs support this. Currently only the FR451 has a sufficiently
 	  featured MMU.

 config FRV_OUTOFLINE_ATOMIC_OPS
 	bool "Out-of-line the FRV atomic operations"
 	default n
 	help
 	  Setting this option causes the FR-V atomic operations to be mostly
 	  implemented out-of-line.

 	  See Documentation/fujitsu/frv/atomic-ops.txt for more information.

 config HIGHMEM
 	bool "High memory support"
 	depends on MMU
 	default y
 	help
 	  If you wish to use more than 256MB of memory with your MMU based
 	  system, you will need to select this option. The kernel can only see
 	  the memory between 0xC0000000 and 0xD0000000 directly... everything
 	  else must be kmapped.

 	  The arch is, however, capable of supporting up to 3GB of SDRAM.

 config HIGHPTE
 	bool "Allocate page tables in highmem"
 	depends on HIGHMEM
 	default y
 	help
 	  The VM uses one page of memory for each page table.  For systems
 	  with a lot of RAM, this can be wasteful of precious low memory.
 	  Setting this option will put user-space page tables in high memory.

 source "mm/Kconfig"

 choice
 	prompt "uClinux kernel load address"
 	depends on !MMU
 	default UCPAGE_OFFSET_C0000000
 	help
 	  This option sets the base address for the uClinux kernel. The kernel
 	  will rearrange the SDRAM layout to start at this address, and move
 	  itself to start there. It must be greater than 0, and it must be
 	  sufficiently less than 0xE0000000 that the SDRAM does not intersect
 	  the I/O region.

 	  The base address must also be aligned such that the SDRAM controller
 	  can decode it. For instance, a 512MB SDRAM bank must be 512MB aligned.

 config UCPAGE_OFFSET_20000000
        bool "0x20000000"

 config UCPAGE_OFFSET_40000000
        bool "0x40000000"

 config UCPAGE_OFFSET_60000000
        bool "0x60000000"

 config UCPAGE_OFFSET_80000000
        bool "0x80000000"

 config UCPAGE_OFFSET_A0000000
        bool "0xA0000000"

 config UCPAGE_OFFSET_C0000000
        bool "0xC0000000 (Recommended)"

 endchoice

 config PROTECT_KERNEL
 	bool "Protect core kernel against userspace"
 	depends on !MMU
 	default y
 	help
 	  Selecting this option causes the uClinux kernel to change the
 	  permittivity of DAMPR register covering the core kernel image to
 	  prevent userspace accessing the underlying memory directly.

 choice
 	prompt "CPU Caching mode"
 	default FRV_DEFL_CACHE_WBACK
 	help
 	  This option determines the default caching mode for the kernel.

 	  Write-Back caching mode involves the all reads and writes causing
 	  the affected cacheline to be read into the cache first before being
 	  operated upon. Memory is not then updated by a write until the cache
 	  is filled and a cacheline needs to be displaced from the cache to
 	  make room. Only at that point is it written back.

 	  Write-Behind caching is similar to Write-Back caching, except that a
 	  write won't fetch a cacheline into the cache if there isn't already
 	  one there; it will write directly to memory instead.

 	  Write-Through caching only fetches cachelines from memory on a
 	  read. Writes always get written directly to memory. If the affected
 	  cacheline is also in cache, it will be updated too.

 	  The final option is to turn of caching entirely.

 	  Note that not all CPUs support Write-Behind caching. If the CPU on
 	  which the kernel is running doesn't, it'll fall back to Write-Back
 	  caching.

 config FRV_DEFL_CACHE_WBACK
 	bool "Write-Back"

 config FRV_DEFL_CACHE_WBEHIND
 	bool "Write-Behind"

 config FRV_DEFL_CACHE_WTHRU
 	bool "Write-Through"

 config FRV_DEFL_CACHE_DISABLED
 	bool "Disabled"

 endchoice

 menu "CPU core support"

 config CPU_FR401
 	bool "Include FR401 core support"
 	depends on !MMU
 	default y
 	help
 	  This enables support for the FR401, FR401A and FR403 CPUs

 config CPU_FR405
 	bool "Include FR405 core support"
 	depends on !MMU
 	default y
 	help
 	  This enables support for the FR405 CPU

 config CPU_FR451
 	bool "Include FR451 core support"
 	default y
 	help
 	  This enables support for the FR451 CPU

 config CPU_FR451_COMPILE
 	bool "Specifically compile for FR451 core"
 	depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
 	default y
 	help
 	  This causes appropriate flags to be passed to the compiler to
 	  optimise for the FR451 CPU

 config CPU_FR551
 	bool "Include FR551 core support"
 	depends on !MMU
 	default y
 	help
 	  This enables support for the FR555 CPU

 config CPU_FR551_COMPILE
 	bool "Specifically compile for FR551 core"
 	depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
 	default y
 	help
 	  This causes appropriate flags to be passed to the compiler to
 	  optimise for the FR555 CPU

 config FRV_L1_CACHE_SHIFT
 	int
 	default "5" if CPU_FR401 || CPU_FR405 || CPU_FR451
 	default "6" if CPU_FR551

 endmenu

 choice
 	prompt "System support"
 	default MB93091_VDK

 config MB93091_VDK
 	bool "MB93091 CPU board with or without motherboard"

 config MB93093_PDK
 	bool "MB93093 PDK unit"

 endchoice

 if MB93091_VDK
 choice
 	prompt "Motherboard support"
 	default MB93090_MB00

 config MB93090_MB00
 	bool "Use the MB93090-MB00 motherboard"
 	help
 	  Select this option if the MB93091 CPU board is going to be used with
 	  a MB93090-MB00 VDK motherboard

 config MB93091_NO_MB
 	bool "Use standalone"
 	help
 	  Select this option if the MB93091 CPU board is going to be used
 	  without a motherboard

 endchoice
 endif

 choice
 	prompt "GP-Relative data support"
 	default GPREL_DATA_8
 	help
 	  This option controls what data, if any, should be placed in the GP
 	  relative data sections. Using this means that the compiler can
 	  generate accesses to the data using GR16-relative addressing which
 	  is faster than absolute instructions and saves space (2 instructions
 	  per access).

 	  However, the GPREL region is limited in size because the immediate
 	  value used in the load and store instructions is limited to a 12-bit
 	  signed number.

 	  So if the linker starts complaining that accesses to GPREL data are
 	  out of range, try changing this option from the default.

 	  Note that modules will always be compiled with this feature disabled
 	  as the module data will not be in range of the GP base address.

 config GPREL_DATA_8
 	bool "Put data objects of up to 8 bytes into GP-REL"

 config GPREL_DATA_4
 	bool "Put data objects of up to 4 bytes into GP-REL"

 config GPREL_DATA_NONE
 	bool "Don't use GP-REL"

 endchoice

 config FRV_ONCPU_SERIAL
 	bool "Use on-CPU serial ports"
 	select SERIAL_8250
 	default y

 config PCI
 	bool "Use PCI"
 	depends on MB93090_MB00
 	default y
 	help
 	  Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
 	  onboard. If you have one of these boards and you wish to use the PCI
 	  facilities, say Y here.

 	  The PCI-HOWTO, available from
 	  <http://www.tldp.org/docs.html#howto>, contains valuable
 	  information about which PCI hardware does work under Linux and which
 	  doesn't.

 config RESERVE_DMA_COHERENT
 	bool "Reserve DMA coherent memory"
 	depends on PCI && !MMU
 	default y
 	help
 	  Many PCI drivers require access to uncached memory for DMA device
 	  communications (such as is done with some Ethernet buffer rings). If
 	  a fully featured MMU is available, this can be done through page
 	  table settings, but if not, a region has to be set aside and marked
 	  with a special DAMPR register.

 	  Setting this option causes uClinux to set aside a portion of the
 	  available memory for use in this manner. The memory will then be
 	  unavailable for normal kernel use.

 source "drivers/pci/Kconfig"

 source "drivers/pcmcia/Kconfig"

 #config MATH_EMULATION
 #	bool "Math emulation support (EXPERIMENTAL)"
 #	depends on EXPERIMENTAL
 #	help
 #	  At some point in the future, this will cause floating-point math
 #	  instructions to be emulated by the kernel on machines that lack a
 #	  floating-point math coprocessor.  Thrill-seekers and chronically
 #	  sleep-deprived psychotic hacker types can say Y now, everyone else
 #	  should probably wait a while.

 menu "Power management options"
 source kernel/power/Kconfig
 endmenu

 endmenu


 menu "Executable formats"

 source "fs/Kconfig.binfmt"

 endmenu

 source "net/Kconfig"

 source "drivers/Kconfig"

 source "fs/Kconfig"

 source "arch/frv/Kconfig.debug"

 source "security/Kconfig"

 source "crypto/Kconfig"

 source "lib/Kconfig"
	#
	# For a description of the syntax of this configuration file,
	# see Documentation/kbuild/kconfig-language.txt.
	#
	config FRV
	bool
	default y

	config RWSEM_GENERIC_SPINLOCK
	bool
	default y

	config RWSEM_XCHGADD_ALGORITHM
	bool

	config GENERIC_FIND_NEXT_BIT
	bool
	default y

	config GENERIC_CALIBRATE_DELAY
	bool
	default n

	config GENERIC_HARDIRQS
	bool
	default n

	config TIME_LOW_RES
	bool
	default y

	mainmenu "Fujitsu FR-V Kernel Configuration"

	source "init/Kconfig"


	menu "Fujitsu FR-V system setup"

	config MMU
	bool "MMU support"
	help
	This options switches on and off support for the FR-V MMU
	(effectively switching between vmlinux and uClinux). Not all FR-V
	CPUs support this. Currently only the FR451 has a sufficiently
	featured MMU.

	config FRV_OUTOFLINE_ATOMIC_OPS
	bool "Out-of-line the FRV atomic operations"
	default n
	help
	Setting this option causes the FR-V atomic operations to be mostly
	implemented out-of-line.

	See Documentation/fujitsu/frv/atomic-ops.txt for more information.

	config HIGHMEM
	bool "High memory support"
	depends on MMU
	default y
	help
	If you wish to use more than 256MB of memory with your MMU based
	system, you will need to select this option. The kernel can only see
	the memory between 0xC0000000 and 0xD0000000 directly... everything
	else must be kmapped.

	The arch is, however, capable of supporting up to 3GB of SDRAM.

	config HIGHPTE
	bool "Allocate page tables in highmem"
	depends on HIGHMEM
	default y
	help
	The VM uses one page of memory for each page table. For systems
	with a lot of RAM, this can be wasteful of precious low memory.
	Setting this option will put user-space page tables in high memory.

	source "mm/Kconfig"

	choice
	prompt "uClinux kernel load address"
	depends on !MMU
	default UCPAGE_OFFSET_C0000000
	help
	This option sets the base address for the uClinux kernel. The kernel
	will rearrange the SDRAM layout to start at this address, and move
	itself to start there. It must be greater than 0, and it must be
	sufficiently less than 0xE0000000 that the SDRAM does not intersect
	the I/O region.

	The base address must also be aligned such that the SDRAM controller
	can decode it. For instance, a 512MB SDRAM bank must be 512MB aligned.

	config UCPAGE_OFFSET_20000000
	bool "0x20000000"

	config UCPAGE_OFFSET_40000000
	bool "0x40000000"

	config UCPAGE_OFFSET_60000000
	bool "0x60000000"

	config UCPAGE_OFFSET_80000000
	bool "0x80000000"

	config UCPAGE_OFFSET_A0000000
	bool "0xA0000000"

	config UCPAGE_OFFSET_C0000000
	bool "0xC0000000 (Recommended)"

	endchoice

	config PROTECT_KERNEL
	bool "Protect core kernel against userspace"
	depends on !MMU
	default y
	help
	Selecting this option causes the uClinux kernel to change the
	permittivity of DAMPR register covering the core kernel image to
	prevent userspace accessing the underlying memory directly.

	choice
	prompt "CPU Caching mode"
	default FRV_DEFL_CACHE_WBACK
	help
	This option determines the default caching mode for the kernel.

	Write-Back caching mode involves the all reads and writes causing
	the affected cacheline to be read into the cache first before being
	operated upon. Memory is not then updated by a write until the cache
	is filled and a cacheline needs to be displaced from the cache to
	make room. Only at that point is it written back.

	Write-Behind caching is similar to Write-Back caching, except that a
	write won't fetch a cacheline into the cache if there isn't already
	one there; it will write directly to memory instead.

	Write-Through caching only fetches cachelines from memory on a
	read. Writes always get written directly to memory. If the affected
	cacheline is also in cache, it will be updated too.

	The final option is to turn of caching entirely.

	Note that not all CPUs support Write-Behind caching. If the CPU on
	which the kernel is running doesn't, it'll fall back to Write-Back
	caching.

	config FRV_DEFL_CACHE_WBACK
	bool "Write-Back"

	config FRV_DEFL_CACHE_WBEHIND
	bool "Write-Behind"

	config FRV_DEFL_CACHE_WTHRU
	bool "Write-Through"

	config FRV_DEFL_CACHE_DISABLED
	bool "Disabled"

	endchoice

	menu "CPU core support"

	config CPU_FR401
	bool "Include FR401 core support"
	depends on !MMU
	default y
	help
	This enables support for the FR401, FR401A and FR403 CPUs

	config CPU_FR405
	bool "Include FR405 core support"
	depends on !MMU
	default y
	help
	This enables support for the FR405 CPU

	config CPU_FR451
	bool "Include FR451 core support"
	default y
	help
	This enables support for the FR451 CPU

	config CPU_FR451_COMPILE
	bool "Specifically compile for FR451 core"
	depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
	default y
	help
	This causes appropriate flags to be passed to the compiler to
	optimise for the FR451 CPU

	config CPU_FR551
	bool "Include FR551 core support"
	depends on !MMU
	default y
	help
	This enables support for the FR555 CPU

	config CPU_FR551_COMPILE
	bool "Specifically compile for FR551 core"
	depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
	default y
	help
	This causes appropriate flags to be passed to the compiler to
	optimise for the FR555 CPU

	config FRV_L1_CACHE_SHIFT
	int
	default "5" if CPU_FR401 \|\| CPU_FR405 \|\| CPU_FR451
	default "6" if CPU_FR551

	endmenu

	choice
	prompt "System support"
	default MB93091_VDK

	config MB93091_VDK
	bool "MB93091 CPU board with or without motherboard"

	config MB93093_PDK
	bool "MB93093 PDK unit"

	endchoice

	if MB93091_VDK
	choice
	prompt "Motherboard support"
	default MB93090_MB00

	config MB93090_MB00
	bool "Use the MB93090-MB00 motherboard"
	help
	Select this option if the MB93091 CPU board is going to be used with
	a MB93090-MB00 VDK motherboard

	config MB93091_NO_MB
	bool "Use standalone"
	help
	Select this option if the MB93091 CPU board is going to be used
	without a motherboard

	endchoice
	endif

	choice
	prompt "GP-Relative data support"
	default GPREL_DATA_8
	help
	This option controls what data, if any, should be placed in the GP
	relative data sections. Using this means that the compiler can
	generate accesses to the data using GR16-relative addressing which
	is faster than absolute instructions and saves space (2 instructions
	per access).

	However, the GPREL region is limited in size because the immediate
	value used in the load and store instructions is limited to a 12-bit
	signed number.

	So if the linker starts complaining that accesses to GPREL data are
	out of range, try changing this option from the default.

	Note that modules will always be compiled with this feature disabled
	as the module data will not be in range of the GP base address.

	config GPREL_DATA_8
	bool "Put data objects of up to 8 bytes into GP-REL"

	config GPREL_DATA_4
	bool "Put data objects of up to 4 bytes into GP-REL"

	config GPREL_DATA_NONE
	bool "Don't use GP-REL"

	endchoice

	config FRV_ONCPU_SERIAL
	bool "Use on-CPU serial ports"
	select SERIAL_8250
	default y

	config PCI
	bool "Use PCI"
	depends on MB93090_MB00
	default y
	help
	Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
	onboard. If you have one of these boards and you wish to use the PCI
	facilities, say Y here.

	The PCI-HOWTO, available from
	<http://www.tldp.org/docs.html#howto>, contains valuable
	information about which PCI hardware does work under Linux and which
	doesn't.

	config RESERVE_DMA_COHERENT
	bool "Reserve DMA coherent memory"
	depends on PCI && !MMU
	default y
	help
	Many PCI drivers require access to uncached memory for DMA device
	communications (such as is done with some Ethernet buffer rings). If
	a fully featured MMU is available, this can be done through page
	table settings, but if not, a region has to be set aside and marked
	with a special DAMPR register.

	Setting this option causes uClinux to set aside a portion of the
	available memory for use in this manner. The memory will then be
	unavailable for normal kernel use.

	source "drivers/pci/Kconfig"

	source "drivers/pcmcia/Kconfig"

	#config MATH_EMULATION
	# bool "Math emulation support (EXPERIMENTAL)"
	# depends on EXPERIMENTAL
	# help
	# At some point in the future, this will cause floating-point math
	# instructions to be emulated by the kernel on machines that lack a
	# floating-point math coprocessor. Thrill-seekers and chronically
	# sleep-deprived psychotic hacker types can say Y now, everyone else
	# should probably wait a while.

	menu "Power management options"
	source kernel/power/Kconfig
	endmenu

	endmenu


	menu "Executable formats"

	source "fs/Kconfig.binfmt"

	endmenu

	source "net/Kconfig"

	source "drivers/Kconfig"

	source "fs/Kconfig"

	source "arch/frv/Kconfig.debug"

	source "security/Kconfig"

	source "crypto/Kconfig"

	source "lib/Kconfig"