538f19526e
With dynamic function tracer, by default, _mcount is defined as an
"empty" function, it returns directly without any more action . When
enabling it in user-space, it will jump to a real tracing
function(ftrace_caller), and do the real job for us.
Differ from the static function tracer, dynamic function tracer provides
two functions ftrace_make_call()/ftrace_make_nop() to enable/disable the
tracing of some indicated kernel functions(set_ftrace_filter).
In the -v4 version, the implementation of this support is basically the same as
X86 version does: _mcount is implemented as an empty function and ftrace_caller
is implemented as a real tracing function respectively.
But in this version, to support module tracing with the help of
-mlong-calls in arch/mips/Makefile:
MODFLAGS += -mlong-calls.
The stuff becomes a little more complex. We need to cope with two
different type of calling to _mcount.
For the kernel part, the calling to _mcount(result of "objdump -hdr
vmlinux"). is like this:
108: 03e0082d move at,ra
10c: 0c000000 jal 0 <fpcsr_pending>
10c: R_MIPS_26 _mcount
10c: R_MIPS_NONE *ABS*
10c: R_MIPS_NONE *ABS*
110: 00020021 nop
For the module with -mlong-calls, it looks like this:
c: 3c030000 lui v1,0x0
c: R_MIPS_HI16 _mcount
c: R_MIPS_NONE *ABS*
c: R_MIPS_NONE *ABS*
10: 64630000 daddiu v1,v1,0
10: R_MIPS_LO16 _mcount
10: R_MIPS_NONE *ABS*
10: R_MIPS_NONE *ABS*
14: 03e0082d move at,ra
18: 0060f809 jalr v1
In the kernel version, there is only one "_mcount" string for every
kernel function, so, we just need to match this one in mcount_regex of
scripts/recordmcount.pl, but in the module version, we need to choose
one of the two to match. Herein, I choose the first one with
"R_MIPS_HI16 _mcount".
and In the kernel verion, without module tracing support, we just need
to replace "jal _mcount" by "jal ftrace_caller" to do real tracing, and
filter the tracing of some kernel functions via replacing it by a nop
instruction.
but as we have described before, the instruction "jal ftrace_caller" only left
32bit length for the address of ftrace_caller, it will fail when calling from
the module space. so, herein, we must replace something else.
the basic idea is loading the address of ftrace_caller to v1 via changing these
two instructions:
lui v1,0x0
addiu v1,v1,0
If we want to enable the tracing, we need to replace the above instructions to:
lui v1, HI_16BIT_ftrace_caller
addiu v1, v1, LOW_16BIT_ftrace_caller
If we want to stop the tracing of the indicated kernel functions, we
just need to replace the "jalr v1" to a nop instruction. but we need to
replace two instructions and encode the above two instructions
oursevles.
Is there a simpler solution? Yes! Here it is, in this version, we put _mcount
and ftrace_caller together, which means the address of _mcount and
ftrace_caller is the same:
_mcount:
ftrace_caller:
j ftrace_stub
nop
...(do real tracing here)...
ftrace_stub:
jr ra
move ra, at
By default, the kernel functions call _mcount, and then jump to ftrace_stub and
return. and when we want to do real tracing, we just need to remove that "j
ftrace_stub", and it will run through the two "nop" instructions and then do
the real tracing job.
what about filtering job? we just need to do this:
lui v1, hi_16bit_of_mcount <--> b 1f (0x10000004)
addiu v1, v1, low_16bit_of_mcount
move at, ra
jalr v1
nop
1f: (rec->ip + 12)
In linux-mips64, there will be some local symbols, whose name are
prefixed by $L, which need to be filtered. thanks goes to Steven for
writing the mips64-specific function_regex.
In a conclusion, with RISC, things becomes easier with such a "stupid"
trick, RISC is something like K.I.S.S, and also, there are lots of
"simple" tricks in the whole ftrace support, thanks goes to Steven and
the other folks for providing such a wonderful tracing framework!
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: Nicholas Mc Guire <der.herr@hofr.at>
Cc: zhangfx@lemote.com
Cc: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/675/
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
52 KiB
config MIPS bool default y select HAVE_GENERIC_DMA_COHERENT select HAVE_IDE select HAVE_OPROFILE select HAVE_ARCH_KGDB select HAVE_FUNCTION_TRACER select HAVE_FUNCTION_TRACE_MCOUNT_TEST select HAVE_DYNAMIC_FTRACE select HAVE_FTRACE_MCOUNT_RECORD # Horrible source of confusion. Die, die, die ... select EMBEDDED select RTC_LIB if !MACH_LOONGSON
mainmenu "Linux/MIPS Kernel Configuration"
menu "Machine selection"
config ZONE_DMA bool
choice prompt "System type" default SGI_IP22
config MACH_ALCHEMY bool "Alchemy processor based machines" select SYS_SUPPORTS_ZBOOT
config AR7 bool "Texas Instruments AR7" select BOOT_ELF32 select DMA_NONCOHERENT select CEVT_R4K select CSRC_R4K select IRQ_CPU select NO_EXCEPT_FILL select SWAP_IO_SPACE select SYS_HAS_CPU_MIPS32_R1 select SYS_HAS_EARLY_PRINTK select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_LITTLE_ENDIAN select SYS_SUPPORTS_ZBOOT_UART16550 select GENERIC_GPIO select GCD select VLYNQ help Support for the Texas Instruments AR7 System-on-a-Chip family: TNETD7100, 7200 and 7300.
config BASLER_EXCITE bool "Basler eXcite smart camera" select CEVT_R4K select CSRC_R4K select DMA_COHERENT select HW_HAS_PCI select IRQ_CPU select IRQ_CPU_RM7K select IRQ_CPU_RM9K select MIPS_RM9122 select SYS_HAS_CPU_RM9000 select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN help The eXcite is a smart camera platform manufactured by Basler Vision Technologies AG.
config BCM47XX bool "BCM47XX based boards" select CEVT_R4K select CSRC_R4K select DMA_NONCOHERENT select HW_HAS_PCI select IRQ_CPU select SYS_HAS_CPU_MIPS32_R1 select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_LITTLE_ENDIAN select SSB select SSB_DRIVER_MIPS select SSB_DRIVER_EXTIF select SSB_EMBEDDED select SSB_PCICORE_HOSTMODE if PCI select GENERIC_GPIO select SYS_HAS_EARLY_PRINTK select CFE help Support for BCM47XX based boards
config BCM63XX bool "Broadcom BCM63XX based boards" select CEVT_R4K select CSRC_R4K select DMA_NONCOHERENT select IRQ_CPU select SYS_HAS_CPU_MIPS32_R1 select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN select SYS_HAS_EARLY_PRINTK select SWAP_IO_SPACE select ARCH_REQUIRE_GPIOLIB help Support for BCM63XX based boards
config MIPS_COBALT bool "Cobalt Server" select CEVT_R4K select CSRC_R4K select CEVT_GT641XX select DMA_NONCOHERENT select HW_HAS_PCI select I8253 select I8259 select IRQ_CPU select IRQ_GT641XX select PCI_GT64XXX_PCI0 select PCI select SYS_HAS_CPU_NEVADA select SYS_HAS_EARLY_PRINTK select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_64BIT_KERNEL select SYS_SUPPORTS_LITTLE_ENDIAN
config MACH_DECSTATION bool "DECstations" select BOOT_ELF32 select CEVT_DS1287 select CEVT_R4K select CSRC_IOASIC select CSRC_R4K select CPU_DADDI_WORKAROUNDS if 64BIT select CPU_R4000_WORKAROUNDS if 64BIT select CPU_R4400_WORKAROUNDS if 64BIT select DMA_NONCOHERENT select NO_IOPORT select IRQ_CPU select SYS_HAS_CPU_R3000 select SYS_HAS_CPU_R4X00 select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL select SYS_SUPPORTS_LITTLE_ENDIAN select SYS_SUPPORTS_128HZ select SYS_SUPPORTS_256HZ select SYS_SUPPORTS_1024HZ help This enables support for DEC's MIPS based workstations. For details see the Linux/MIPS FAQ on http://www.linux-mips.org/ and the DECstation porting pages on http://decstation.unix-ag.org/.
If you have one of the following DECstation Models you definitely
want to choose R4xx0 for the CPU Type:
DECstation 5000/50
DECstation 5000/150
DECstation 5000/260
DECsystem 5900/260
otherwise choose R3000.
config MACH_JAZZ bool "Jazz family of machines" select ARC select ARC32 select ARCH_MAY_HAVE_PC_FDC select CEVT_R4K select CSRC_R4K select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN select GENERIC_ISA_DMA select IRQ_CPU select I8253 select I8259 select ISA select SYS_HAS_CPU_R4X00 select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL select SYS_SUPPORTS_100HZ help This a family of machines based on the MIPS R4030 chipset which was used by several vendors to build RISC/os and Windows NT workstations. Members include the Acer PICA, MIPS Magnum 4000, MIPS Millennium and Olivetti M700-10 workstations.
config LASAT bool "LASAT Networks platforms" select CEVT_R4K select CSRC_R4K select DMA_NONCOHERENT select SYS_HAS_EARLY_PRINTK select HW_HAS_PCI select IRQ_CPU select PCI_GT64XXX_PCI0 select MIPS_NILE4 select R5000_CPU_SCACHE select SYS_HAS_CPU_R5000 select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_64BIT_KERNEL if BROKEN select SYS_SUPPORTS_LITTLE_ENDIAN
config MACH_LOONGSON bool "Loongson family of machines" select SYS_SUPPORTS_ZBOOT_UART16550 help This enables the support of Loongson family of machines.
Loongson is a family of general-purpose MIPS-compatible CPUs.
developed at Institute of Computing Technology (ICT),
Chinese Academy of Sciences (CAS) in the People's Republic
of China. The chief architect is Professor Weiwu Hu.
config MIPS_MALTA bool "MIPS Malta board" select ARCH_MAY_HAVE_PC_FDC select BOOT_ELF32 select BOOT_RAW select CEVT_R4K select CSRC_R4K select DMA_NONCOHERENT select GENERIC_ISA_DMA select IRQ_CPU select IRQ_GIC select HW_HAS_PCI select I8253 select I8259 select MIPS_BOARDS_GEN select MIPS_BONITO64 select MIPS_CPU_SCACHE select PCI_GT64XXX_PCI0 select MIPS_MSC select SWAP_IO_SPACE select SYS_HAS_CPU_MIPS32_R1 select SYS_HAS_CPU_MIPS32_R2 select SYS_HAS_CPU_MIPS64_R1 select SYS_HAS_CPU_NEVADA select SYS_HAS_CPU_RM7000 select SYS_HAS_EARLY_PRINTK select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_64BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_LITTLE_ENDIAN select SYS_SUPPORTS_MIPS_CMP select SYS_SUPPORTS_MULTITHREADING select SYS_SUPPORTS_SMARTMIPS select SYS_SUPPORTS_ZBOOT help This enables support for the MIPS Technologies Malta evaluation board.
config MIPS_SIM bool 'MIPS simulator (MIPSsim)' select CEVT_R4K select CSRC_R4K select DMA_NONCOHERENT select SYS_HAS_EARLY_PRINTK select IRQ_CPU select BOOT_RAW select SYS_HAS_CPU_MIPS32_R1 select SYS_HAS_CPU_MIPS32_R2 select SYS_HAS_EARLY_PRINTK select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_MULTITHREADING select SYS_SUPPORTS_LITTLE_ENDIAN help This option enables support for MIPS Technologies MIPSsim software emulator.
config NEC_MARKEINS bool "NEC EMMA2RH Mark-eins board" select SOC_EMMA2RH select HW_HAS_PCI help This enables support for the NEC Electronics Mark-eins boards.
config MACH_VR41XX bool "NEC VR4100 series based machines" select CEVT_R4K select CSRC_R4K select SYS_HAS_CPU_VR41XX select ARCH_REQUIRE_GPIOLIB
config NXP_STB220 bool "NXP STB220 board" select SOC_PNX833X help Support for NXP Semiconductors STB220 Development Board.
config NXP_STB225 bool "NXP 225 board" select SOC_PNX833X select SOC_PNX8335 help Support for NXP Semiconductors STB225 Development Board.
config PNX8550_JBS bool "NXP PNX8550 based JBS board" select PNX8550 select SYS_SUPPORTS_LITTLE_ENDIAN
config PNX8550_STB810 bool "NXP PNX8550 based STB810 board" select PNX8550 select SYS_SUPPORTS_LITTLE_ENDIAN
config PMC_MSP bool "PMC-Sierra MSP chipsets" depends on EXPERIMENTAL select DMA_NONCOHERENT select SWAP_IO_SPACE select NO_EXCEPT_FILL select BOOT_RAW select SYS_HAS_CPU_MIPS32_R1 select SYS_HAS_CPU_MIPS32_R2 select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN select IRQ_CPU select SERIAL_8250 select SERIAL_8250_CONSOLE help This adds support for the PMC-Sierra family of Multi-Service Processor System-On-A-Chips. These parts include a number of integrated peripherals, interfaces and DSPs in addition to a variety of MIPS cores.
config PMC_YOSEMITE bool "PMC-Sierra Yosemite eval board" select CEVT_R4K select CSRC_R4K select DMA_COHERENT select HW_HAS_PCI select IRQ_CPU select IRQ_CPU_RM7K select IRQ_CPU_RM9K select SWAP_IO_SPACE select SYS_HAS_CPU_RM9000 select SYS_HAS_EARLY_PRINTK select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_64BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_HIGHMEM select SYS_SUPPORTS_SMP help Yosemite is an evaluation board for the RM9000x2 processor manufactured by PMC-Sierra.
config POWERTV bool "Cisco PowerTV" select BOOT_ELF32 select CEVT_R4K select CPU_MIPSR2_IRQ_VI select CPU_MIPSR2_IRQ_EI select CSRC_POWERTV select DMA_NONCOHERENT select HW_HAS_PCI select SYS_HAS_EARLY_PRINTK select SYS_HAS_CPU_MIPS32_R2 select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_HIGHMEM select USB_OHCI_LITTLE_ENDIAN help This enables support for the Cisco PowerTV Platform.
config SGI_IP22 bool "SGI IP22 (Indy/Indigo2)" select ARC select ARC32 select BOOT_ELF32 select CEVT_R4K select CSRC_R4K select DEFAULT_SGI_PARTITION select DMA_NONCOHERENT select HW_HAS_EISA select I8253 select I8259 select IP22_CPU_SCACHE select IRQ_CPU select GENERIC_ISA_DMA_SUPPORT_BROKEN select SGI_HAS_I8042 select SGI_HAS_INDYDOG select SGI_HAS_HAL2 select SGI_HAS_SEEQ select SGI_HAS_WD93 select SGI_HAS_ZILOG select SWAP_IO_SPACE select SYS_HAS_CPU_R4X00 select SYS_HAS_CPU_R5000 # # Disable EARLY_PRINTK for now since it leads to overwritten prom # memory during early boot on some machines. # # See http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20091119164009.GA15038%40deprecation.cyrius.com # for a more details discussion # # select SYS_HAS_EARLY_PRINTK select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_64BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN help This are the SGI Indy, Challenge S and Indigo2, as well as certain OEM variants like the Tandem CMN B006S. To compile a Linux kernel that runs on these, say Y here.
config SGI_IP27 bool "SGI IP27 (Origin200/2000)" select ARC select ARC64 select BOOT_ELF64 select DEFAULT_SGI_PARTITION select DMA_COHERENT select SYS_HAS_EARLY_PRINTK select HW_HAS_PCI select NR_CPUS_DEFAULT_64 select SYS_HAS_CPU_R10000 select SYS_SUPPORTS_64BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_NUMA select SYS_SUPPORTS_SMP help This are the SGI Origin 200, Origin 2000 and Onyx 2 Graphics workstations. To compile a Linux kernel that runs on these, say Y here.
config SGI_IP28 bool "SGI IP28 (Indigo2 R10k) (EXPERIMENTAL)" depends on EXPERIMENTAL select ARC select ARC64 select BOOT_ELF64 select CEVT_R4K select CSRC_R4K select DEFAULT_SGI_PARTITION select DMA_NONCOHERENT select GENERIC_ISA_DMA_SUPPORT_BROKEN select IRQ_CPU select HW_HAS_EISA select I8253 select I8259 select SGI_HAS_I8042 select SGI_HAS_INDYDOG select SGI_HAS_HAL2 select SGI_HAS_SEEQ select SGI_HAS_WD93 select SGI_HAS_ZILOG select SWAP_IO_SPACE select SYS_HAS_CPU_R10000 # # Disable EARLY_PRINTK for now since it leads to overwritten prom # memory during early boot on some machines. # # See http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20091119164009.GA15038%40deprecation.cyrius.com # for a more details discussion # # select SYS_HAS_EARLY_PRINTK select SYS_SUPPORTS_64BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN help This is the SGI Indigo2 with R10000 processor. To compile a Linux kernel that runs on these, say Y here.
config SGI_IP32 bool "SGI IP32 (O2)" select ARC select ARC32 select BOOT_ELF32 select CEVT_R4K select CSRC_R4K select DMA_NONCOHERENT select HW_HAS_PCI select IRQ_CPU select R5000_CPU_SCACHE select RM7000_CPU_SCACHE select SYS_HAS_CPU_R5000 select SYS_HAS_CPU_R10000 if BROKEN select SYS_HAS_CPU_RM7000 select SYS_HAS_CPU_NEVADA select SYS_SUPPORTS_64BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN help If you want this kernel to run on SGI O2 workstation, say Y here.
config SIBYTE_CRHINE bool "Sibyte BCM91120C-CRhine" depends on EXPERIMENTAL select BOOT_ELF32 select DMA_COHERENT select SIBYTE_BCM1120 select SWAP_IO_SPACE select SYS_HAS_CPU_SB1 select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_LITTLE_ENDIAN
config SIBYTE_CARMEL bool "Sibyte BCM91120x-Carmel" depends on EXPERIMENTAL select BOOT_ELF32 select DMA_COHERENT select SIBYTE_BCM1120 select SWAP_IO_SPACE select SYS_HAS_CPU_SB1 select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_LITTLE_ENDIAN
config SIBYTE_CRHONE bool "Sibyte BCM91125C-CRhone" depends on EXPERIMENTAL select BOOT_ELF32 select DMA_COHERENT select SIBYTE_BCM1125 select SWAP_IO_SPACE select SYS_HAS_CPU_SB1 select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_HIGHMEM select SYS_SUPPORTS_LITTLE_ENDIAN
config SIBYTE_RHONE bool "Sibyte BCM91125E-Rhone" depends on EXPERIMENTAL select BOOT_ELF32 select DMA_COHERENT select SIBYTE_BCM1125H select SWAP_IO_SPACE select SYS_HAS_CPU_SB1 select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_LITTLE_ENDIAN
config SIBYTE_SWARM bool "Sibyte BCM91250A-SWARM" select BOOT_ELF32 select DMA_COHERENT select NR_CPUS_DEFAULT_2 select SIBYTE_SB1250 select SWAP_IO_SPACE select SYS_HAS_CPU_SB1 select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_HIGHMEM select SYS_SUPPORTS_LITTLE_ENDIAN select ZONE_DMA32 if 64BIT
config SIBYTE_LITTLESUR bool "Sibyte BCM91250C2-LittleSur" depends on EXPERIMENTAL select BOOT_ELF32 select DMA_COHERENT select NR_CPUS_DEFAULT_2 select SIBYTE_SB1250 select SWAP_IO_SPACE select SYS_HAS_CPU_SB1 select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_HIGHMEM select SYS_SUPPORTS_LITTLE_ENDIAN
config SIBYTE_SENTOSA bool "Sibyte BCM91250E-Sentosa" depends on EXPERIMENTAL select BOOT_ELF32 select DMA_COHERENT select NR_CPUS_DEFAULT_2 select SIBYTE_SB1250 select SWAP_IO_SPACE select SYS_HAS_CPU_SB1 select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_LITTLE_ENDIAN
config SIBYTE_BIGSUR bool "Sibyte BCM91480B-BigSur" select BOOT_ELF32 select DMA_COHERENT select NR_CPUS_DEFAULT_4 select SIBYTE_BCM1x80 select SWAP_IO_SPACE select SYS_HAS_CPU_SB1 select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_HIGHMEM select SYS_SUPPORTS_LITTLE_ENDIAN select ZONE_DMA32 if 64BIT
config SNI_RM bool "SNI RM200/300/400" select ARC if CPU_LITTLE_ENDIAN select ARC32 if CPU_LITTLE_ENDIAN select SNIPROM if CPU_BIG_ENDIAN select ARCH_MAY_HAVE_PC_FDC select BOOT_ELF32 select CEVT_R4K select CSRC_R4K select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN select DMA_NONCOHERENT select GENERIC_ISA_DMA select HW_HAS_EISA select HW_HAS_PCI select IRQ_CPU select I8253 select I8259 select ISA select SWAP_IO_SPACE if CPU_BIG_ENDIAN select SYS_HAS_CPU_R4X00 select SYS_HAS_CPU_R5000 select SYS_HAS_CPU_R10000 select R5000_CPU_SCACHE select SYS_HAS_EARLY_PRINTK select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_HIGHMEM select SYS_SUPPORTS_LITTLE_ENDIAN help The SNI RM200/300/400 are MIPS-based machines manufactured by Siemens Nixdorf Informationssysteme (SNI), parent company of Pyramid Technology and now in turn merged with Fujitsu. Say Y here to support this machine type.
config MACH_TX39XX bool "Toshiba TX39 series based machines"
config MACH_TX49XX bool "Toshiba TX49 series based machines"
config MIKROTIK_RB532 bool "Mikrotik RB532 boards" select CEVT_R4K select CSRC_R4K select DMA_NONCOHERENT select HW_HAS_PCI select IRQ_CPU select SYS_HAS_CPU_MIPS32_R1 select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_LITTLE_ENDIAN select SWAP_IO_SPACE select BOOT_RAW select ARCH_REQUIRE_GPIOLIB help Support the Mikrotik(tm) RouterBoard 532 series, based on the IDT RC32434 SoC.
config WR_PPMC bool "Wind River PPMC board" select CEVT_R4K select CSRC_R4K select IRQ_CPU select BOOT_ELF32 select DMA_NONCOHERENT select HW_HAS_PCI select PCI_GT64XXX_PCI0 select SWAP_IO_SPACE select SYS_HAS_CPU_MIPS32_R1 select SYS_HAS_CPU_MIPS32_R2 select SYS_HAS_CPU_MIPS64_R1 select SYS_HAS_CPU_NEVADA select SYS_HAS_CPU_RM7000 select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_64BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_LITTLE_ENDIAN help This enables support for the Wind River MIPS32 4KC PPMC evaluation board, which is based on GT64120 bridge chip.
config CAVIUM_OCTEON_SIMULATOR bool "Cavium Networks Octeon Simulator" select CEVT_R4K select 64BIT_PHYS_ADDR select DMA_COHERENT select SYS_SUPPORTS_64BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_HIGHMEM select SYS_SUPPORTS_HOTPLUG_CPU select SYS_HAS_CPU_CAVIUM_OCTEON help The Octeon simulator is software performance model of the Cavium Octeon Processor. It supports simulating Octeon processors on x86 hardware.
config CAVIUM_OCTEON_REFERENCE_BOARD bool "Cavium Networks Octeon reference board" select CEVT_R4K select 64BIT_PHYS_ADDR select DMA_COHERENT select SYS_SUPPORTS_64BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_HIGHMEM select SYS_SUPPORTS_HOTPLUG_CPU select SYS_HAS_EARLY_PRINTK select SYS_HAS_CPU_CAVIUM_OCTEON select SWAP_IO_SPACE select HW_HAS_PCI select ARCH_SUPPORTS_MSI help This option supports all of the Octeon reference boards from Cavium Networks. It builds a kernel that dynamically determines the Octeon CPU type and supports all known board reference implementations. Some of the supported boards are: EBT3000 EBH3000 EBH3100 Thunder Kodama Hikari Say Y here for most Octeon reference boards.
endchoice
source "arch/mips/alchemy/Kconfig" source "arch/mips/basler/excite/Kconfig" source "arch/mips/bcm63xx/Kconfig" source "arch/mips/jazz/Kconfig" source "arch/mips/lasat/Kconfig" source "arch/mips/pmc-sierra/Kconfig" source "arch/mips/powertv/Kconfig" source "arch/mips/sgi-ip27/Kconfig" source "arch/mips/sibyte/Kconfig" source "arch/mips/txx9/Kconfig" source "arch/mips/vr41xx/Kconfig" source "arch/mips/cavium-octeon/Kconfig" source "arch/mips/loongson/Kconfig"
endmenu
config RWSEM_GENERIC_SPINLOCK bool default y
config RWSEM_XCHGADD_ALGORITHM bool
config ARCH_HAS_ILOG2_U32 bool default n
config ARCH_HAS_ILOG2_U64 bool default n
config ARCH_SUPPORTS_OPROFILE bool default y if !MIPS_MT_SMTC
config GENERIC_FIND_NEXT_BIT bool default y
config GENERIC_HWEIGHT bool default y
config GENERIC_CALIBRATE_DELAY bool default y
config GENERIC_CLOCKEVENTS bool default y
config GENERIC_TIME bool default y
config GENERIC_CMOS_UPDATE bool default y
config SCHED_OMIT_FRAME_POINTER bool default y
config GENERIC_HARDIRQS_NO__DO_IRQ def_bool y
Select some configuration options automatically based on user selections.
config ARC bool
config ARCH_MAY_HAVE_PC_FDC bool
config BOOT_RAW bool
config CEVT_BCM1480 bool
config CEVT_DS1287 bool
config CEVT_GT641XX bool
config CEVT_R4K_LIB bool
config CEVT_R4K select CEVT_R4K_LIB bool
config CEVT_SB1250 bool
config CEVT_TXX9 bool
config CSRC_BCM1480 bool
config CSRC_IOASIC bool
config CSRC_POWERTV bool
config CSRC_R4K_LIB bool
config CSRC_R4K select CSRC_R4K_LIB bool
config CSRC_SB1250 bool
config GPIO_TXX9 select GENERIC_GPIO select ARCH_REQUIRE_GPIOLIB bool
config CFE bool
config DMA_COHERENT bool
config DMA_NONCOHERENT bool select DMA_NEED_PCI_MAP_STATE
config DMA_NEED_PCI_MAP_STATE bool
config EARLY_PRINTK bool "Early printk" if EMBEDDED && DEBUG_KERNEL depends on SYS_HAS_EARLY_PRINTK default y help This option enables special console drivers which allow the kernel to print messages very early in the bootup process.
This is useful for kernel debugging when your machine crashes very
early before the console code is initialized. For normal operation,
it is not recommended because it looks ugly on some machines and
doesn't cooperate with an X server. You should normally say N here,
unless you want to debug such a crash.
config SYS_HAS_EARLY_PRINTK bool
config HOTPLUG_CPU bool "Support for hot-pluggable CPUs" depends on SMP && HOTPLUG && SYS_SUPPORTS_HOTPLUG_CPU help Say Y here to allow turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu. (Note: power management support will enable this option automatically on SMP systems. ) Say N if you want to disable CPU hotplug.
config SYS_SUPPORTS_HOTPLUG_CPU bool
config I8259 bool
config MIPS_BONITO64 bool
config MIPS_MSC bool
config MIPS_NILE4 bool
config MIPS_DISABLE_OBSOLETE_IDE bool
config SYNC_R4K bool
config NO_IOPORT def_bool n
config GENERIC_ISA_DMA bool select ZONE_DMA if GENERIC_ISA_DMA_SUPPORT_BROKEN=n
config GENERIC_ISA_DMA_SUPPORT_BROKEN bool select GENERIC_ISA_DMA
config GENERIC_GPIO bool
Endianess selection. Sufficiently obscure so many users don't know what to
answer,so we try hard to limit the available choices. Also the use of a
choice statement should be more obvious to the user.
choice prompt "Endianess selection" help Some MIPS machines can be configured for either little or big endian byte order. These modes require different kernels and a different Linux distribution. In general there is one preferred byteorder for a particular system but some systems are just as commonly used in the one or the other endianness.
config CPU_BIG_ENDIAN bool "Big endian" depends on SYS_SUPPORTS_BIG_ENDIAN
config CPU_LITTLE_ENDIAN bool "Little endian" depends on SYS_SUPPORTS_LITTLE_ENDIAN help
endchoice
config SYS_SUPPORTS_APM_EMULATION bool
config SYS_SUPPORTS_BIG_ENDIAN bool
config SYS_SUPPORTS_LITTLE_ENDIAN bool
config SYS_SUPPORTS_HUGETLBFS bool depends on CPU_SUPPORTS_HUGEPAGES && 64BIT default y
config IRQ_CPU bool
config IRQ_CPU_RM7K bool
config IRQ_CPU_RM9K bool
config IRQ_MSP_SLP bool
config IRQ_MSP_CIC bool
config IRQ_TXX9 bool
config IRQ_GT641XX bool
config IRQ_GIC bool
config IRQ_CPU_OCTEON bool
config MIPS_BOARDS_GEN bool
config PCI_GT64XXX_PCI0 bool
config NO_EXCEPT_FILL bool
config MIPS_RM9122 bool select SERIAL_RM9000
config SOC_EMMA2RH bool select CEVT_R4K select CSRC_R4K select DMA_NONCOHERENT select IRQ_CPU select SWAP_IO_SPACE select SYS_HAS_CPU_R5500 select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_64BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN
config SOC_PNX833X bool select CEVT_R4K select CSRC_R4K select IRQ_CPU select DMA_NONCOHERENT select SYS_HAS_CPU_MIPS32_R2 select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_LITTLE_ENDIAN select SYS_SUPPORTS_BIG_ENDIAN select GENERIC_GPIO select CPU_MIPSR2_IRQ_VI
config SOC_PNX8335 bool select SOC_PNX833X
config PNX8550 bool select SOC_PNX8550
config SOC_PNX8550 bool select DMA_NONCOHERENT select HW_HAS_PCI select SYS_HAS_CPU_MIPS32_R1 select SYS_HAS_EARLY_PRINTK select SYS_SUPPORTS_32BIT_KERNEL select GENERIC_GPIO
config SWAP_IO_SPACE bool
config SERIAL_RM9000 bool
config SGI_HAS_INDYDOG bool
config SGI_HAS_HAL2 bool
config SGI_HAS_SEEQ bool
config SGI_HAS_WD93 bool
config SGI_HAS_ZILOG bool
config SGI_HAS_I8042 bool
config DEFAULT_SGI_PARTITION bool
config ARC32 bool
config SNIPROM bool
config BOOT_ELF32 bool
config MIPS_L1_CACHE_SHIFT int default "4" if MACH_DECSTATION || MIKROTIK_RB532 || PMC_MSP4200_EVAL default "6" if MIPS_CPU_SCACHE default "7" if SGI_IP22 || SGI_IP27 || SGI_IP28 || SNI_RM || CPU_CAVIUM_OCTEON default "5"
config HAVE_STD_PC_SERIAL_PORT bool
config ARC_CONSOLE bool "ARC console support" depends on SGI_IP22 || SGI_IP28 || (SNI_RM && CPU_LITTLE_ENDIAN)
config ARC_MEMORY bool depends on MACH_JAZZ || SNI_RM || SGI_IP32 default y
config ARC_PROMLIB bool depends on MACH_JAZZ || SNI_RM || SGI_IP22 || SGI_IP28 || SGI_IP32 default y
config ARC64 bool
config BOOT_ELF64 bool
menu "CPU selection"
choice prompt "CPU type" default CPU_R4X00
config CPU_LOONGSON2E bool "Loongson 2E" depends on SYS_HAS_CPU_LOONGSON2E select CPU_LOONGSON2 help The Loongson 2E processor implements the MIPS III instruction set with many extensions.
It has an internal FPGA northbridge, which is compatiable to
bonito64.
config CPU_LOONGSON2F bool "Loongson 2F" depends on SYS_HAS_CPU_LOONGSON2F select CPU_LOONGSON2 help The Loongson 2F processor implements the MIPS III instruction set with many extensions.
Loongson2F have built-in DDR2 and PCIX controller. The PCIX controller
have a similar programming interface with FPGA northbridge used in
Loongson2E.
config CPU_MIPS32_R1 bool "MIPS32 Release 1" depends on SYS_HAS_CPU_MIPS32_R1 select CPU_HAS_PREFETCH select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_HIGHMEM help Choose this option to build a kernel for release 1 or later of the MIPS32 architecture. Most modern embedded systems with a 32-bit MIPS processor are based on a MIPS32 processor. If you know the specific type of processor in your system, choose those that one otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system. Release 2 of the MIPS32 architecture is available since several years so chances are you even have a MIPS32 Release 2 processor in which case you should choose CPU_MIPS32_R2 instead for better performance.
config CPU_MIPS32_R2 bool "MIPS32 Release 2" depends on SYS_HAS_CPU_MIPS32_R2 select CPU_HAS_PREFETCH select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_HIGHMEM help Choose this option to build a kernel for release 2 or later of the MIPS32 architecture. Most modern embedded systems with a 32-bit MIPS processor are based on a MIPS32 processor. If you know the specific type of processor in your system, choose those that one otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
config CPU_MIPS64_R1 bool "MIPS64 Release 1" depends on SYS_HAS_CPU_MIPS64_R1 select CPU_HAS_PREFETCH select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_64BIT_KERNEL select CPU_SUPPORTS_HIGHMEM select CPU_SUPPORTS_HUGEPAGES help Choose this option to build a kernel for release 1 or later of the MIPS64 architecture. Many modern embedded systems with a 64-bit MIPS processor are based on a MIPS64 processor. If you know the specific type of processor in your system, choose those that one otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system. Release 2 of the MIPS64 architecture is available since several years so chances are you even have a MIPS64 Release 2 processor in which case you should choose CPU_MIPS64_R2 instead for better performance.
config CPU_MIPS64_R2 bool "MIPS64 Release 2" depends on SYS_HAS_CPU_MIPS64_R2 select CPU_HAS_PREFETCH select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_64BIT_KERNEL select CPU_SUPPORTS_HIGHMEM select CPU_SUPPORTS_HUGEPAGES help Choose this option to build a kernel for release 2 or later of the MIPS64 architecture. Many modern embedded systems with a 64-bit MIPS processor are based on a MIPS64 processor. If you know the specific type of processor in your system, choose those that one otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
config CPU_R3000 bool "R3000" depends on SYS_HAS_CPU_R3000 select CPU_HAS_WB select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_HIGHMEM help Please make sure to pick the right CPU type. Linux/MIPS is not designed to be generic, i.e. Kernels compiled for R3000 CPUs will not work on R4000 machines and vice versa. However, since most of the supported machines have an R4000 (or similar) CPU, R4x00 might be a safe bet. If the resulting kernel does not work, try to recompile with R3000.
config CPU_TX39XX bool "R39XX" depends on SYS_HAS_CPU_TX39XX select CPU_SUPPORTS_32BIT_KERNEL
config CPU_VR41XX bool "R41xx" depends on SYS_HAS_CPU_VR41XX select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_64BIT_KERNEL help The options selects support for the NEC VR4100 series of processors. Only choose this option if you have one of these processors as a kernel built with this option will not run on any other type of processor or vice versa.
config CPU_R4300 bool "R4300" depends on SYS_HAS_CPU_R4300 select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_64BIT_KERNEL help MIPS Technologies R4300-series processors.
config CPU_R4X00 bool "R4x00" depends on SYS_HAS_CPU_R4X00 select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_64BIT_KERNEL help MIPS Technologies R4000-series processors other than 4300, including the R4000, R4400, R4600, and 4700.
config CPU_TX49XX bool "R49XX" depends on SYS_HAS_CPU_TX49XX select CPU_HAS_PREFETCH select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_64BIT_KERNEL
config CPU_R5000 bool "R5000" depends on SYS_HAS_CPU_R5000 select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_64BIT_KERNEL help MIPS Technologies R5000-series processors other than the Nevada.
config CPU_R5432 bool "R5432" depends on SYS_HAS_CPU_R5432 select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_64BIT_KERNEL
config CPU_R5500 bool "R5500" depends on SYS_HAS_CPU_R5500 select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_64BIT_KERNEL select CPU_SUPPORTS_HUGEPAGES help NEC VR5500 and VR5500A series processors implement 64-bit MIPS IV instruction set.
config CPU_R6000 bool "R6000" depends on EXPERIMENTAL depends on SYS_HAS_CPU_R6000 select CPU_SUPPORTS_32BIT_KERNEL help MIPS Technologies R6000 and R6000A series processors. Note these processors are extremely rare and the support for them is incomplete.
config CPU_NEVADA bool "RM52xx" depends on SYS_HAS_CPU_NEVADA select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_64BIT_KERNEL help QED / PMC-Sierra RM52xx-series ("Nevada") processors.
config CPU_R8000 bool "R8000" depends on EXPERIMENTAL depends on SYS_HAS_CPU_R8000 select CPU_HAS_PREFETCH select CPU_SUPPORTS_64BIT_KERNEL help MIPS Technologies R8000 processors. Note these processors are uncommon and the support for them is incomplete.
config CPU_R10000 bool "R10000" depends on SYS_HAS_CPU_R10000 select CPU_HAS_PREFETCH select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_64BIT_KERNEL select CPU_SUPPORTS_HIGHMEM help MIPS Technologies R10000-series processors.
config CPU_RM7000 bool "RM7000" depends on SYS_HAS_CPU_RM7000 select CPU_HAS_PREFETCH select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_64BIT_KERNEL select CPU_SUPPORTS_HIGHMEM
config CPU_RM9000 bool "RM9000" depends on SYS_HAS_CPU_RM9000 select CPU_HAS_PREFETCH select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_64BIT_KERNEL select CPU_SUPPORTS_HIGHMEM select WEAK_ORDERING
config CPU_SB1 bool "SB1" depends on SYS_HAS_CPU_SB1 select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_64BIT_KERNEL select CPU_SUPPORTS_HIGHMEM select WEAK_ORDERING
config CPU_CAVIUM_OCTEON bool "Cavium Octeon processor" depends on SYS_HAS_CPU_CAVIUM_OCTEON select IRQ_CPU select IRQ_CPU_OCTEON select CPU_HAS_PREFETCH select CPU_SUPPORTS_64BIT_KERNEL select SYS_SUPPORTS_SMP select NR_CPUS_DEFAULT_16 select WEAK_ORDERING select WEAK_REORDERING_BEYOND_LLSC select CPU_SUPPORTS_HIGHMEM select CPU_SUPPORTS_HUGEPAGES help The Cavium Octeon processor is a highly integrated chip containing many ethernet hardware widgets for networking tasks. The processor can have up to 16 Mips64v2 cores and 8 integrated gigabit ethernets. Full details can be found at http://www.caviumnetworks.com.
endchoice
config SYS_SUPPORTS_ZBOOT bool select HAVE_KERNEL_GZIP select HAVE_KERNEL_BZIP2 select HAVE_KERNEL_LZMA
config SYS_SUPPORTS_ZBOOT_UART16550 bool select SYS_SUPPORTS_ZBOOT
config CPU_LOONGSON2 bool select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_64BIT_KERNEL select CPU_SUPPORTS_HIGHMEM
config SYS_HAS_CPU_LOONGSON2E bool
config SYS_HAS_CPU_LOONGSON2F bool select CPU_SUPPORTS_CPUFREQ select CPU_SUPPORTS_ADDRWINCFG if 64BIT select CPU_SUPPORTS_UNCACHED_ACCELERATED
config SYS_HAS_CPU_MIPS32_R1 bool
config SYS_HAS_CPU_MIPS32_R2 bool
config SYS_HAS_CPU_MIPS64_R1 bool
config SYS_HAS_CPU_MIPS64_R2 bool
config SYS_HAS_CPU_R3000 bool
config SYS_HAS_CPU_TX39XX bool
config SYS_HAS_CPU_VR41XX bool
config SYS_HAS_CPU_R4300 bool
config SYS_HAS_CPU_R4X00 bool
config SYS_HAS_CPU_TX49XX bool
config SYS_HAS_CPU_R5000 bool
config SYS_HAS_CPU_R5432 bool
config SYS_HAS_CPU_R5500 bool
config SYS_HAS_CPU_R6000 bool
config SYS_HAS_CPU_NEVADA bool
config SYS_HAS_CPU_R8000 bool
config SYS_HAS_CPU_R10000 bool
config SYS_HAS_CPU_RM7000 bool
config SYS_HAS_CPU_RM9000 bool
config SYS_HAS_CPU_SB1 bool
config SYS_HAS_CPU_CAVIUM_OCTEON bool
CPU may reorder R->R, R->W, W->R, W->W
Reordering beyond LL and SC is handled in WEAK_REORDERING_BEYOND_LLSC
config WEAK_ORDERING bool
CPU may reorder reads and writes beyond LL/SC
CPU may reorder R->LL, R->LL, W->LL, W->LL, R->SC, R->SC, W->SC, W->SC
config WEAK_REORDERING_BEYOND_LLSC bool endmenu
These two indicate any level of the MIPS32 and MIPS64 architecture
config CPU_MIPS32 bool default y if CPU_MIPS32_R1 || CPU_MIPS32_R2
config CPU_MIPS64 bool default y if CPU_MIPS64_R1 || CPU_MIPS64_R2
These two indicate the revision of the architecture, either Release 1 or Release 2
config CPU_MIPSR1 bool default y if CPU_MIPS32_R1 || CPU_MIPS64_R1
config CPU_MIPSR2 bool default y if CPU_MIPS32_R2 || CPU_MIPS64_R2 || CPU_CAVIUM_OCTEON
config SYS_SUPPORTS_32BIT_KERNEL bool config SYS_SUPPORTS_64BIT_KERNEL bool config CPU_SUPPORTS_32BIT_KERNEL bool config CPU_SUPPORTS_64BIT_KERNEL bool config CPU_SUPPORTS_CPUFREQ bool config CPU_SUPPORTS_ADDRWINCFG bool config CPU_SUPPORTS_HUGEPAGES bool config CPU_SUPPORTS_UNCACHED_ACCELERATED bool config MIPS_PGD_C0_CONTEXT bool default y if 64BIT && CPU_MIPSR2
Set to y for ptrace access to watch registers.
config HARDWARE_WATCHPOINTS bool default y if CPU_MIPSR1 || CPU_MIPSR2
menu "Kernel type"
choice
prompt "Kernel code model"
help
You should only select this option if you have a workload that
actually benefits from 64-bit processing or if your machine has
large memory. You will only be presented a single option in this
menu if your system does not support both 32-bit and 64-bit kernels.
config 32BIT bool "32-bit kernel" depends on CPU_SUPPORTS_32BIT_KERNEL && SYS_SUPPORTS_32BIT_KERNEL select TRAD_SIGNALS help Select this option if you want to build a 32-bit kernel. config 64BIT bool "64-bit kernel" depends on CPU_SUPPORTS_64BIT_KERNEL && SYS_SUPPORTS_64BIT_KERNEL select HAVE_SYSCALL_WRAPPERS help Select this option if you want to build a 64-bit kernel.
endchoice
choice prompt "Kernel page size" default PAGE_SIZE_4KB
config PAGE_SIZE_4KB bool "4kB" depends on !CPU_LOONGSON2 help This option select the standard 4kB Linux page size. On some R3000-family processors this is the only available page size. Using 4kB page size will minimize memory consumption and is therefore recommended for low memory systems.
config PAGE_SIZE_8KB bool "8kB" depends on (EXPERIMENTAL && CPU_R8000) || CPU_CAVIUM_OCTEON help Using 8kB page size will result in higher performance kernel at the price of higher memory consumption. This option is available only on R8000 and cnMIPS processors. Note that you will need a suitable Linux distribution to support this.
config PAGE_SIZE_16KB bool "16kB" depends on !CPU_R3000 && !CPU_TX39XX help Using 16kB page size will result in higher performance kernel at the price of higher memory consumption. This option is available on all non-R3000 family processors. Note that you will need a suitable Linux distribution to support this.
config PAGE_SIZE_32KB bool "32kB" depends on CPU_CAVIUM_OCTEON help Using 32kB page size will result in higher performance kernel at the price of higher memory consumption. This option is available only on cnMIPS cores. Note that you will need a suitable Linux distribution to support this.
config PAGE_SIZE_64KB bool "64kB" depends on EXPERIMENTAL && !CPU_R3000 && !CPU_TX39XX help Using 64kB page size will result in higher performance kernel at the price of higher memory consumption. This option is available on all non-R3000 family processor. Not that at the time of this writing this option is still high experimental.
endchoice
config BOARD_SCACHE bool
config IP22_CPU_SCACHE bool select BOARD_SCACHE
Support for a MIPS32 / MIPS64 style S-caches
config MIPS_CPU_SCACHE bool select BOARD_SCACHE
config R5000_CPU_SCACHE bool select BOARD_SCACHE
config RM7000_CPU_SCACHE bool select BOARD_SCACHE
config SIBYTE_DMA_PAGEOPS bool "Use DMA to clear/copy pages" depends on CPU_SB1 help Instead of using the CPU to zero and copy pages, use a Data Mover channel. These DMA channels are otherwise unused by the standard SiByte Linux port. Seems to give a small performance benefit.
config CPU_HAS_PREFETCH bool
choice prompt "MIPS MT options"
config MIPS_MT_DISABLED bool "Disable multithreading support." help Use this option if your workload can't take advantage of MIPS hardware multithreading support. On systems that don't have the option of an MT-enabled processor this option will be the only option in this menu.
config MIPS_MT_SMP bool "Use 1 TC on each available VPE for SMP" depends on SYS_SUPPORTS_MULTITHREADING select CPU_MIPSR2_IRQ_VI select CPU_MIPSR2_IRQ_EI select MIPS_MT select NR_CPUS_DEFAULT_2 select SMP select SYS_SUPPORTS_SCHED_SMT if SMP select SYS_SUPPORTS_SMP select SMP_UP help This is a kernel model which is also known a VSMP or lately has been marketesed into SMVP.
config MIPS_MT_SMTC bool "SMTC: Use all TCs on all VPEs for SMP" depends on CPU_MIPS32_R2 #depends on CPU_MIPS64_R2 # once there is hardware ... depends on SYS_SUPPORTS_MULTITHREADING select CPU_MIPSR2_IRQ_VI select CPU_MIPSR2_IRQ_EI select MIPS_MT select NR_CPUS_DEFAULT_8 select SMP select SYS_SUPPORTS_SMP select SMP_UP help This is a kernel model which is known a SMTC or lately has been marketesed into SMVP.
endchoice
config MIPS_MT bool
config SCHED_SMT bool "SMT (multithreading) scheduler support" depends on SYS_SUPPORTS_SCHED_SMT default n help SMT scheduler support improves the CPU scheduler's decision making when dealing with MIPS MT enabled cores at a cost of slightly increased overhead in some places. If unsure say N here.
config SYS_SUPPORTS_SCHED_SMT bool
config SYS_SUPPORTS_MULTITHREADING bool
config MIPS_MT_FPAFF bool "Dynamic FPU affinity for FP-intensive threads" default y depends on MIPS_MT_SMP || MIPS_MT_SMTC
config MIPS_VPE_LOADER bool "VPE loader support." depends on SYS_SUPPORTS_MULTITHREADING select CPU_MIPSR2_IRQ_VI select CPU_MIPSR2_IRQ_EI select MIPS_MT help Includes a loader for loading an elf relocatable object onto another VPE and running it.
config MIPS_MT_SMTC_IM_BACKSTOP bool "Use per-TC register bits as backstop for inhibited IM bits" depends on MIPS_MT_SMTC default n help To support multiple TC microthreads acting as "CPUs" within a VPE, VPE-wide interrupt mask bits must be specially manipulated during interrupt handling. To support legacy drivers and interrupt controller management code, SMTC has a "backstop" to track and if necessary restore the interrupt mask. This has some performance impact on interrupt service overhead.
config MIPS_MT_SMTC_IRQAFF bool "Support IRQ affinity API" depends on MIPS_MT_SMTC default n help Enables SMP IRQ affinity API (/proc/irq/*/smp_affinity, etc.) for SMTC Linux kernel. Requires platform support, of which an example can be found in the MIPS kernel i8259 and Malta platform code. Adds some overhead to interrupt dispatch, and should be used only if you know what you are doing.
config MIPS_VPE_LOADER_TOM bool "Load VPE program into memory hidden from linux" depends on MIPS_VPE_LOADER default y help The loader can use memory that is present but has been hidden from Linux using the kernel command line option "mem=xxMB". It's up to you to ensure the amount you put in the option and the space your program requires is less or equal to the amount physically present.
this should possibly be in drivers/char, but it is rather cpu related. Hmmm
config MIPS_VPE_APSP_API bool "Enable support for AP/SP API (RTLX)" depends on MIPS_VPE_LOADER help
config MIPS_APSP_KSPD bool "Enable KSPD" depends on MIPS_VPE_APSP_API default y help KSPD is a kernel daemon that accepts syscall requests from the SP side, actions them and returns the results. It also handles the "exit" syscall notifying other kernel modules the SP program is exiting. You probably want to say yes here.
config MIPS_CMP bool "MIPS CMP framework support" depends on SYS_SUPPORTS_MIPS_CMP select SYNC_R4K select SYS_SUPPORTS_SMP select SYS_SUPPORTS_SCHED_SMT if SMP select WEAK_ORDERING default n help This is a placeholder option for the GCMP work. It will need to be handled differently...
config SB1_PASS_1_WORKAROUNDS bool depends on CPU_SB1_PASS_1 default y
config SB1_PASS_2_WORKAROUNDS bool depends on CPU_SB1 && (CPU_SB1_PASS_2_2 || CPU_SB1_PASS_2) default y
config SB1_PASS_2_1_WORKAROUNDS bool depends on CPU_SB1 && CPU_SB1_PASS_2 default y
config 64BIT_PHYS_ADDR bool
config CPU_HAS_SMARTMIPS depends on SYS_SUPPORTS_SMARTMIPS bool "Support for the SmartMIPS ASE" help SmartMIPS is a extension of the MIPS32 architecture aimed at increased security at both hardware and software level for smartcards. Enabling this option will allow proper use of the SmartMIPS instructions by Linux applications. However a kernel with this option will not work on a MIPS core without SmartMIPS core. If you don't know you probably don't have SmartMIPS and should say N here.
config CPU_HAS_WB bool
Vectored interrupt mode is an R2 feature
config CPU_MIPSR2_IRQ_VI bool
Extended interrupt mode is an R2 feature
config CPU_MIPSR2_IRQ_EI bool
config CPU_HAS_SYNC bool depends on !CPU_R3000 default y
config GENERIC_CLOCKEVENTS_BROADCAST bool
CPU non-features
config CPU_DADDI_WORKAROUNDS bool
config CPU_R4000_WORKAROUNDS bool select CPU_R4400_WORKAROUNDS
config CPU_R4400_WORKAROUNDS bool
Use the generic interrupt handling code in kernel/irq/:
config GENERIC_HARDIRQS bool default y
config GENERIC_IRQ_PROBE bool default y
config IRQ_PER_CPU bool
- Highmem only makes sense for the 32-bit kernel.
- The current highmem code will only work properly on physically indexed
caches such as R3000, SB1, R7000 or those that look like they're virtually
indexed such as R4000/R4400 SC and MC versions or R10000. So for the
moment we protect the user and offer the highmem option only on machines
where it's known to be safe. This will not offer highmem on a few systems
such as MIPS32 and MIPS64 CPUs which may have virtual and physically
indexed CPUs but we're playing safe.
- We use SYS_SUPPORTS_HIGHMEM to offer highmem only for systems where we
know they might have memory configurations that could make use of highmem
support.
config HIGHMEM bool "High Memory Support" depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM
config CPU_SUPPORTS_HIGHMEM bool
config SYS_SUPPORTS_HIGHMEM bool
config SYS_SUPPORTS_SMARTMIPS bool
config ARCH_FLATMEM_ENABLE def_bool y depends on !NUMA && !CPU_LOONGSON2
config ARCH_DISCONTIGMEM_ENABLE bool default y if SGI_IP27 help Say Y to support efficient handling of discontiguous physical memory, for architectures which are either NUMA (Non-Uniform Memory Access) or have huge holes in the physical address space for other reasons. See file:Documentation/vm/numa for more.
config ARCH_POPULATES_NODE_MAP def_bool y
config ARCH_SPARSEMEM_ENABLE bool select SPARSEMEM_STATIC
config NUMA bool "NUMA Support" depends on SYS_SUPPORTS_NUMA help Say Y to compile the kernel to support NUMA (Non-Uniform Memory Access). This option improves performance on systems with more than two nodes; on two node systems it is generally better to leave it disabled; on single node systems disable this option disabled.
config SYS_SUPPORTS_NUMA bool
config NODES_SHIFT int default "6" depends on NEED_MULTIPLE_NODES
source "mm/Kconfig"
config SMP bool "Multi-Processing support" depends on SYS_SUPPORTS_SMP select IRQ_PER_CPU select USE_GENERIC_SMP_HELPERS help This enables support for systems with more than one CPU. If you have a system with only one CPU, like most personal computers, say N. If you have a system with more than one CPU, say Y.
If you say N here, the kernel will run on single and multiprocessor
machines, but will use only one CPU of a multiprocessor machine. If
you say Y here, the kernel will run on many, but not all,
singleprocessor machines. On a singleprocessor machine, the kernel
will run faster if you say N here.
People using multiprocessor machines who say Y here should also say
Y to "Enhanced Real Time Clock Support", below.
See also the SMP-HOWTO available at
<http://www.tldp.org/docs.html#howto>.
If you don't know what to do here, say N.
config SMP_UP bool
config SYS_SUPPORTS_MIPS_CMP bool
config SYS_SUPPORTS_SMP bool
config NR_CPUS_DEFAULT_1 bool
config NR_CPUS_DEFAULT_2 bool
config NR_CPUS_DEFAULT_4 bool
config NR_CPUS_DEFAULT_8 bool
config NR_CPUS_DEFAULT_16 bool
config NR_CPUS_DEFAULT_32 bool
config NR_CPUS_DEFAULT_64 bool
config NR_CPUS int "Maximum number of CPUs (2-64)" range 1 64 if NR_CPUS_DEFAULT_1 depends on SMP default "1" if NR_CPUS_DEFAULT_1 default "2" if NR_CPUS_DEFAULT_2 default "4" if NR_CPUS_DEFAULT_4 default "8" if NR_CPUS_DEFAULT_8 default "16" if NR_CPUS_DEFAULT_16 default "32" if NR_CPUS_DEFAULT_32 default "64" if NR_CPUS_DEFAULT_64 help This allows you to specify the maximum number of CPUs which this kernel will support. The maximum supported value is 32 for 32-bit kernel and 64 for 64-bit kernels; the minimum value which makes sense is 1 for Qemu (useful only for kernel debugging purposes) and 2 for all others.
This is purely to save memory - each supported CPU adds
approximately eight kilobytes to the kernel image. For best
performance should round up your number of processors to the next
power of two.
source "kernel/time/Kconfig"
Timer Interrupt Frequency Configuration
choice prompt "Timer frequency" default HZ_250 help Allows the configuration of the timer frequency.
config HZ_48
bool "48 HZ" if SYS_SUPPORTS_48HZ || SYS_SUPPORTS_ARBIT_HZ
config HZ_100
bool "100 HZ" if SYS_SUPPORTS_100HZ || SYS_SUPPORTS_ARBIT_HZ
config HZ_128
bool "128 HZ" if SYS_SUPPORTS_128HZ || SYS_SUPPORTS_ARBIT_HZ
config HZ_250
bool "250 HZ" if SYS_SUPPORTS_250HZ || SYS_SUPPORTS_ARBIT_HZ
config HZ_256
bool "256 HZ" if SYS_SUPPORTS_256HZ || SYS_SUPPORTS_ARBIT_HZ
config HZ_1000
bool "1000 HZ" if SYS_SUPPORTS_1000HZ || SYS_SUPPORTS_ARBIT_HZ
config HZ_1024
bool "1024 HZ" if SYS_SUPPORTS_1024HZ || SYS_SUPPORTS_ARBIT_HZ
endchoice
config SYS_SUPPORTS_48HZ bool
config SYS_SUPPORTS_100HZ bool
config SYS_SUPPORTS_128HZ bool
config SYS_SUPPORTS_250HZ bool
config SYS_SUPPORTS_256HZ bool
config SYS_SUPPORTS_1000HZ bool
config SYS_SUPPORTS_1024HZ bool
config SYS_SUPPORTS_ARBIT_HZ
bool
default y if !SYS_SUPPORTS_48HZ && !SYS_SUPPORTS_100HZ &&
!SYS_SUPPORTS_128HZ && !SYS_SUPPORTS_250HZ &&
!SYS_SUPPORTS_256HZ && !SYS_SUPPORTS_1000HZ &&
!SYS_SUPPORTS_1024HZ
config HZ int default 48 if HZ_48 default 100 if HZ_100 default 128 if HZ_128 default 250 if HZ_250 default 256 if HZ_256 default 1000 if HZ_1000 default 1024 if HZ_1024
source "kernel/Kconfig.preempt"
config MIPS_INSANE_LARGE bool "Support for large 64-bit configurations" depends on CPU_R10000 && 64BIT help MIPS R10000 does support a 44 bit / 16TB address space as opposed to previous 64-bit processors which only supported 40 bit / 1TB. If you need processes of more than 1TB virtual address space, say Y here. This will result in additional memory usage, so it is not recommended for normal users.
config KEXEC bool "Kexec system call (EXPERIMENTAL)" depends on EXPERIMENTAL help kexec is a system call that implements the ability to shutdown your current kernel, and to start another kernel. It is like a reboot but it is independent of the system firmware. And like a reboot you can start any kernel with it, not just Linux.
The name comes from the similarity to the exec system call.
It is an ongoing process to be certain the hardware in a machine
is properly shutdown, so do not be surprised if this code does not
initially work for you. It may help to enable device hotplugging
support. As of this writing the exact hardware interface is
strongly in flux, so no good recommendation can be made.
config SECCOMP bool "Enable seccomp to safely compute untrusted bytecode" depends on PROC_FS default y help This kernel feature is useful for number crunching applications that may need to compute untrusted bytecode during their execution. By using pipes or other transports made available to the process as file descriptors supporting the read/write syscalls, it's possible to isolate those applications in their own address space using seccomp. Once seccomp is enabled via /proc//seccomp, it cannot be disabled and the task is only allowed to execute a few safe syscalls defined by each seccomp mode.
If unsure, say Y. Only embedded should say N here.
endmenu
config LOCKDEP_SUPPORT bool default y
config STACKTRACE_SUPPORT bool default y
source "init/Kconfig"
source "kernel/Kconfig.freezer"
menu "Bus options (PCI, PCMCIA, EISA, ISA, TC)"
config HW_HAS_EISA bool config HW_HAS_PCI bool
config PCI bool "Support for PCI controller" depends on HW_HAS_PCI select PCI_DOMAINS help Find out whether you have a PCI motherboard. PCI is the name of a bus system, i.e. the way the CPU talks to the other stuff inside your box. Other bus systems are ISA, EISA, or VESA. If you have PCI, say Y, otherwise N.
config PCI_DOMAINS bool
source "drivers/pci/Kconfig"
ISA support is now enabled via select. Too many systems still have the one
or other ISA chip on the board that users don't know about so don't expect
users to choose the right thing ...
config ISA bool
config EISA bool "EISA support" depends on HW_HAS_EISA select ISA select GENERIC_ISA_DMA ---help--- The Extended Industry Standard Architecture (EISA) bus was developed as an open alternative to the IBM MicroChannel bus.
The EISA bus provided some of the features of the IBM MicroChannel
bus while maintaining backward compatibility with cards made for
the older ISA bus. The EISA bus saw limited use between 1988 and
1995 when it was made obsolete by the PCI bus.
Say Y here if you are building a kernel for an EISA-based machine.
Otherwise, say N.
source "drivers/eisa/Kconfig"
config TC bool "TURBOchannel support" depends on MACH_DECSTATION help TurboChannel is a DEC (now Compaq (now HP)) bus for Alpha and MIPS processors. Documentation on writing device drivers for TurboChannel is available at: http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/AA-PS3HD-TET1_html/TITLE.html.
#config ACCESSBUS
bool "Access.Bus support"
depends on TC
config MMU bool default y
config I8253 bool select MIPS_EXTERNAL_TIMER
config ZONE_DMA32 bool
source "drivers/pcmcia/Kconfig"
source "drivers/pci/hotplug/Kconfig"
endmenu
menu "Executable file formats"
source "fs/Kconfig.binfmt"
config TRAD_SIGNALS bool
config MIPS32_COMPAT bool "Kernel support for Linux/MIPS 32-bit binary compatibility" depends on 64BIT help Select this option if you want Linux/MIPS 32-bit binary compatibility. Since all software available for Linux/MIPS is currently 32-bit you should say Y here.
config COMPAT bool depends on MIPS32_COMPAT default y
config SYSVIPC_COMPAT bool depends on COMPAT && SYSVIPC default y
config MIPS32_O32 bool "Kernel support for o32 binaries" depends on MIPS32_COMPAT help Select this option if you want to run o32 binaries. These are pure 32-bit binaries as used by the 32-bit Linux/MIPS port. Most of existing binaries are in this format.
If unsure, say Y.
config MIPS32_N32 bool "Kernel support for n32 binaries" depends on MIPS32_COMPAT help Select this option if you want to run n32 binaries. These are 64-bit binaries using 32-bit quantities for addressing and certain data that would normally be 64-bit. They are used in special cases.
If unsure, say N.
config BINFMT_ELF32 bool default y if MIPS32_O32 || MIPS32_N32
endmenu
menu "Power management options"
config ARCH_HIBERNATION_POSSIBLE def_bool y depends on SYS_SUPPORTS_HOTPLUG_CPU || !SMP
config ARCH_SUSPEND_POSSIBLE def_bool y depends on SYS_SUPPORTS_HOTPLUG_CPU || !SMP
source "kernel/power/Kconfig"
endmenu
source "arch/mips/kernel/cpufreq/Kconfig"
source "net/Kconfig"
source "drivers/Kconfig"
source "fs/Kconfig"
source "arch/mips/Kconfig.debug"
source "security/Kconfig"
source "crypto/Kconfig"
source "lib/Kconfig"