kconfig

linux2.6.16版本

menu "Processor selection"

#
# Processor families
#
config CPU_SH2
	bool
	select SH_WRITETHROUGH

config CPU_SH3
	bool
	select CPU_HAS_INTEVT
	select CPU_HAS_SR_RB

config CPU_SH4
	bool
	select CPU_HAS_INTEVT
	select CPU_HAS_SR_RB

config CPU_SH4A
	bool
	select CPU_SH4
	select CPU_HAS_INTC2_IRQ

config CPU_SUBTYPE_ST40
	bool
	select CPU_SH4
	select CPU_HAS_INTC2_IRQ

#
# Processor subtypes
#

comment "SH-2 Processor Support"

config CPU_SUBTYPE_SH7604
	bool "Support SH7604 processor"
	select CPU_SH2

comment "SH-3 Processor Support"

config CPU_SUBTYPE_SH7300
	bool "Support SH7300 processor"
	select CPU_SH3

config CPU_SUBTYPE_SH7705
	bool "Support SH7705 processor"
	select CPU_SH3
	select CPU_HAS_PINT_IRQ

config CPU_SUBTYPE_SH7707
	bool "Support SH7707 processor"
	select CPU_SH3
	select CPU_HAS_PINT_IRQ
	help
	  Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.

config CPU_SUBTYPE_SH7708
	bool "Support SH7708 processor"
	select CPU_SH3
	help
	  Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
	  if you have a 100 Mhz SH-3 HD6417708R CPU.

config CPU_SUBTYPE_SH7709
	bool "Support SH7709 processor"
	select CPU_SH3
	select CPU_HAS_PINT_IRQ
	help
	  Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.

comment "SH-4 Processor Support"

config CPU_SUBTYPE_SH7750
	bool "Support SH7750 processor"
	select CPU_SH4
	help
	  Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.

config CPU_SUBTYPE_SH7091
	bool "Support SH7091 processor"
	select CPU_SH4
	select CPU_SUBTYPE_SH7750
	help
	  Select SH7091 if you have an SH-4 based Sega device (such as
	  the Dreamcast, Naomi, and Naomi 2).

config CPU_SUBTYPE_SH7750R
	bool "Support SH7750R processor"
	select CPU_SH4
	select CPU_SUBTYPE_SH7750

config CPU_SUBTYPE_SH7750S
	bool "Support SH7750S processor"
	select CPU_SH4
	select CPU_SUBTYPE_SH7750

config CPU_SUBTYPE_SH7751
	bool "Support SH7751 processor"
	select CPU_SH4
	help
	  Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
	  or if you have a HD6417751R CPU.

config CPU_SUBTYPE_SH7751R
	bool "Support SH7751R processor"
	select CPU_SH4
	select CPU_SUBTYPE_SH7751

config CPU_SUBTYPE_SH7760
	bool "Support SH7760 processor"
	select CPU_SH4
	select CPU_HAS_INTC2_IRQ

config CPU_SUBTYPE_SH4_202
	bool "Support SH4-202 processor"
	select CPU_SH4

comment "ST40 Processor Support"

config CPU_SUBTYPE_ST40STB1
	bool "Support ST40STB1/ST40RA processors"
	select CPU_SUBTYPE_ST40
	help
	  Select ST40STB1 if you have a ST40RA CPU.
	  This was previously called the ST40STB1, hence the option name.

config CPU_SUBTYPE_ST40GX1
	bool "Support ST40GX1 processor"
	select CPU_SUBTYPE_ST40
	help
	  Select ST40GX1 if you have a ST40GX1 CPU.

comment "SH-4A Processor Support"

config CPU_SUBTYPE_SH73180
	bool "Support SH73180 processor"
	select CPU_SH4A

config CPU_SUBTYPE_SH7770
	bool "Support SH7770 processor"
	select CPU_SH4A

config CPU_SUBTYPE_SH7780
	bool "Support SH7780 processor"
	select CPU_SH4A

endmenu

menu "Memory management options"

config MMU
        bool "Support for memory management hardware"
	depends on !CPU_SH2
	default y
	help
	  Some SH processors (such as SH-2/SH-2A) lack an MMU. In order to
	  boot on these systems, this option must not be set.

	  On other systems (such as the SH-3 and 4) where an MMU exists,
	  turning this off will boot the kernel on these machines with the
	  MMU implicitly switched off.

config 32BIT
	bool "Support 32-bit physical addressing through PMB"
	depends on CPU_SH4A
	default y
	help
	  If you say Y here, physical addressing will be extended to
	  32-bits through the SH-4A PMB. If this is not set, legacy
	  29-bit physical addressing will be used.

choice
	prompt "HugeTLB page size"
	depends on HUGETLB_PAGE && CPU_SH4 && MMU
	default HUGETLB_PAGE_SIZE_64K

config HUGETLB_PAGE_SIZE_64K
	bool "64K"

config HUGETLB_PAGE_SIZE_1MB
	bool "1MB"

endchoice

source "mm/Kconfig"

endmenu

menu "Cache configuration"

config SH7705_CACHE_32KB
	bool "Enable 32KB cache size for SH7705"
	depends on CPU_SUBTYPE_SH7705
	default y

config SH_DIRECT_MAPPED
	bool "Use direct-mapped caching"
	default n
	help
	  Selecting this option will configure the caches to be direct-mapped,
	  even if the cache supports a 2 or 4-way mode. This is useful primarily
	  for debugging on platforms with 2 and 4-way caches (SH7750R/SH7751R,
	  SH4-202, SH4-501, etc.)

	  Turn this option off for platforms that do not have a direct-mapped
	  cache, and you have no need to run the caches in such a configuration.

config SH_WRITETHROUGH
	bool "Use write-through caching"
	default y if CPU_SH2
	help
	  Selecting this option will configure the caches in write-through
	  mode, as opposed to the default write-back configuration.

	  Since there's sill some aliasing issues on SH-4, this option will
	  unfortunately still require the majority of flushing functions to
	  be implemented to deal with aliasing.

	  If unsure, say N.

config SH_OCRAM
	bool "Operand Cache RAM (OCRAM) support"
	help
	  Selecting this option will automatically tear down the number of
	  sets in the dcache by half, which in turn exposes a memory range.

	  The addresses for the OC RAM base will vary according to the
	  processor version. Consult vendor documentation for specifics.

	  If unsure, say N.

endmenu