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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
config CPU_SH4AL_DSP
bool
select CPU_SH4A
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_SH7706
bool "Support SH7706 processor"
select CPU_SH3
help
Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
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.
config CPU_SUBTYPE_SH7710
bool "Support SH7710 processor"
select CPU_SH3
help
Select SH7710 if you have a SH3-DSP SH7710 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_SH7770
bool "Support SH7770 processor"
select CPU_SH4A
config CPU_SUBTYPE_SH7780
bool "Support SH7780 processor"
select CPU_SH4A
select CPU_HAS_INTC2_IRQ
comment "SH4AL-DSP Processor Support"
config CPU_SUBTYPE_SH73180
bool "Support SH73180 processor"
select CPU_SH4AL_DSP
config CPU_SUBTYPE_SH7343
bool "Support SH7343 processor"
select CPU_SH4AL_DSP
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 PAGE_OFFSET
hex
default "0x80000000" if MMU
default "0x00000000"
config MEMORY_START
hex "Physical memory start address"
default "0x08000000"
---help---
Computers built with Hitachi SuperH processors always
map the ROM starting at address zero. But the processor
does not specify the range that RAM takes.
The physical memory (RAM) start address will be automatically
set to 08000000. Other platforms, such as the Solution Engine
boards typically map RAM at 0C000000.
Tweak this only when porting to a new machine which does not
already have a defconfig. Changing it from the known correct
value on any of the known systems will only lead to disaster.
config MEMORY_SIZE
hex "Physical memory size"
default "0x00400000"
help
This sets the default memory size assumed by your SH kernel. It can
be overridden as normal by the 'mem=' argument on the kernel command
line. If unsure, consult your board specifications or just leave it
as 0x00400000 which was the default value before this became
configurable.
config 32BIT
bool "Support 32-bit physical addressing through PMB"
depends on CPU_SH4A && MMU
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.
config VSYSCALL
bool "Support vsyscall page"
depends on MMU
default y
help
This will enable support for the kernel mapping a vDSO page
in process space, and subsequently handing down the entry point
to the libc through the ELF auxiliary vector.
From the kernel side this is used for the signal trampoline.
For systems with an MMU that can afford to give up a page,
(the default value) say Y.
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
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