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-rw-r--r--arch/xtensa/Kconfig92
1 files changed, 75 insertions, 17 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index 3a617af60d46..49c6c3d94449 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -4,24 +4,23 @@ config ZONE_DMA
config XTENSA
def_bool y
select ARCH_WANT_FRAME_POINTERS
- select HAVE_IDE
- select GENERIC_ATOMIC64
- select GENERIC_CLOCKEVENTS
- select VIRT_TO_BUS
- select GENERIC_IRQ_SHOW
- select GENERIC_SCHED_CLOCK
- select MODULES_USE_ELF_RELA
- select GENERIC_PCI_IOMAP
select ARCH_WANT_IPC_PARSE_VERSION
select ARCH_WANT_OPTIONAL_GPIOLIB
select BUILDTIME_EXTABLE_SORT
select CLONE_BACKWARDS
- select IRQ_DOMAIN
- select HAVE_OPROFILE
+ select COMMON_CLK
+ select GENERIC_ATOMIC64
+ select GENERIC_CLOCKEVENTS
+ select GENERIC_IRQ_SHOW
+ select GENERIC_PCI_IOMAP
+ select GENERIC_SCHED_CLOCK
select HAVE_FUNCTION_TRACER
select HAVE_IRQ_TIME_ACCOUNTING
+ select HAVE_OPROFILE
select HAVE_PERF_EVENTS
- select COMMON_CLK
+ select IRQ_DOMAIN
+ select MODULES_USE_ELF_RELA
+ select VIRT_TO_BUS
help
Xtensa processors are 32-bit RISC machines designed by Tensilica
primarily for embedded systems. These processors are both
@@ -62,7 +61,9 @@ config TRACE_IRQFLAGS_SUPPORT
def_bool y
config MMU
- def_bool n
+ bool
+ default n if !XTENSA_VARIANT_CUSTOM
+ default XTENSA_VARIANT_MMU if XTENSA_VARIANT_CUSTOM
config VARIANT_IRQ_SWITCH
def_bool n
@@ -102,8 +103,40 @@ config XTENSA_VARIANT_S6000
select VARIANT_IRQ_SWITCH
select ARCH_REQUIRE_GPIOLIB
select XTENSA_CALIBRATE_CCOUNT
+
+config XTENSA_VARIANT_CUSTOM
+ bool "Custom Xtensa processor configuration"
+ select MAY_HAVE_SMP
+ select HAVE_XTENSA_GPIO32
+ help
+ Select this variant to use a custom Xtensa processor configuration.
+ You will be prompted for a processor variant CORENAME.
endchoice
+config XTENSA_VARIANT_CUSTOM_NAME
+ string "Xtensa Processor Custom Core Variant Name"
+ depends on XTENSA_VARIANT_CUSTOM
+ help
+ Provide the name of a custom Xtensa processor variant.
+ This CORENAME selects arch/xtensa/variant/CORENAME.
+ Dont forget you have to select MMU if you have one.
+
+config XTENSA_VARIANT_NAME
+ string
+ default "dc232b" if XTENSA_VARIANT_DC232B
+ default "dc233c" if XTENSA_VARIANT_DC233C
+ default "fsf" if XTENSA_VARIANT_FSF
+ default "s6000" if XTENSA_VARIANT_S6000
+ default XTENSA_VARIANT_CUSTOM_NAME if XTENSA_VARIANT_CUSTOM
+
+config XTENSA_VARIANT_MMU
+ bool "Core variant has a Full MMU (TLB, Pages, Protection, etc)"
+ depends on XTENSA_VARIANT_CUSTOM
+ default y
+ help
+ Build a Conventional Kernel with full MMU support,
+ ie: it supports a TLB with auto-loading, page protection.
+
config XTENSA_UNALIGNED_USER
bool "Unaligned memory access in use space"
help
@@ -156,13 +189,9 @@ config HOTPLUG_CPU
Say N if you want to disable CPU hotplug.
-config MATH_EMULATION
- bool "Math emulation"
- help
- Can we use information of configuration file?
-
config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
bool "Initialize Xtensa MMU inside the Linux kernel code"
+ depends on MMU
default y
help
Earlier version initialized the MMU in the exception vector
@@ -192,6 +221,7 @@ config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
config HIGHMEM
bool "High Memory Support"
+ depends on MMU
help
Linux can use the full amount of RAM in the system by
default. However, the default MMUv2 setup only maps the
@@ -208,6 +238,32 @@ config HIGHMEM
If unsure, say Y.
+config FAST_SYSCALL_XTENSA
+ bool "Enable fast atomic syscalls"
+ default n
+ help
+ fast_syscall_xtensa is a syscall that can make atomic operations
+ on UP kernel when processor has no s32c1i support.
+
+ This syscall is deprecated. It may have issues when called with
+ invalid arguments. It is provided only for backwards compatibility.
+ Only enable it if your userspace software requires it.
+
+ If unsure, say N.
+
+config FAST_SYSCALL_SPILL_REGISTERS
+ bool "Enable spill registers syscall"
+ default n
+ help
+ fast_syscall_spill_registers is a syscall that spills all active
+ register windows of a calling userspace task onto its stack.
+
+ This syscall is deprecated. It may have issues when called with
+ invalid arguments. It is provided only for backwards compatibility.
+ Only enable it if your userspace software requires it.
+
+ If unsure, say N.
+
endmenu
config XTENSA_CALIBRATE_CCOUNT
@@ -250,12 +306,14 @@ config XTENSA_PLATFORM_ISS
config XTENSA_PLATFORM_XT2000
bool "XT2000"
+ select HAVE_IDE
help
XT2000 is the name of Tensilica's feature-rich emulation platform.
This hardware is capable of running a full Linux distribution.
config XTENSA_PLATFORM_S6105
bool "S6105"
+ select HAVE_IDE
select SERIAL_CONSOLE
select NO_IOPORT_MAP
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