2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
6 mainmenu "Blackfin Kernel Configuration"
16 config RWSEM_GENERIC_SPINLOCK
20 config RWSEM_XCHGADD_ALGORITHM
29 select ARCH_WANT_OPTIONAL_GPIOLIB
35 config GENERIC_FIND_NEXT_BIT
39 config GENERIC_HWEIGHT
43 config GENERIC_HARDIRQS
47 config GENERIC_IRQ_PROBE
55 config FORCE_MAX_ZONEORDER
59 config GENERIC_CALIBRATE_DELAY
69 source "kernel/Kconfig.preempt"
71 source "kernel/Kconfig.freezer"
73 menu "Blackfin Processor Options"
75 comment "Processor and Board Settings"
84 BF512 Processor Support.
89 BF514 Processor Support.
94 BF516 Processor Support.
99 BF518 Processor Support.
104 BF522 Processor Support.
109 BF523 Processor Support.
114 BF524 Processor Support.
119 BF525 Processor Support.
124 BF526 Processor Support.
129 BF527 Processor Support.
134 BF531 Processor Support.
139 BF532 Processor Support.
144 BF533 Processor Support.
149 BF534 Processor Support.
154 BF536 Processor Support.
159 BF537 Processor Support.
164 BF538 Processor Support.
169 BF539 Processor Support.
174 BF542 Processor Support.
179 BF544 Processor Support.
184 BF547 Processor Support.
189 BF548 Processor Support.
194 BF549 Processor Support.
199 BF561 Processor Support.
205 bool "Symmetric multi-processing support"
207 This enables support for systems with more than one CPU,
208 like the dual core BF561. If you have a system with only one
209 CPU, say N. If you have a system with more than one CPU, say Y.
211 If you don't know what to do here, say N.
223 config TICK_SOURCE_SYSTMR0
231 default 0 if (BF51x || BF52x || BF54x)
232 default 2 if (BF537 || BF536 || BF534)
233 default 3 if (BF561 ||BF533 || BF532 || BF531)
234 default 4 if (BF538 || BF539)
238 default 2 if (BF51x || BF52x || BF54x)
239 default 3 if (BF537 || BF536 || BF534)
240 default 5 if (BF561 || BF538 || BF539)
241 default 6 if (BF533 || BF532 || BF531)
245 default BF_REV_0_1 if (BF51x || BF52x || BF54x)
246 default BF_REV_0_2 if (BF534 || BF536 || BF537)
247 default BF_REV_0_3 if (BF531 || BF532 || BF533 || BF561)
251 depends on (BF51x || BF52x || BF54x)
255 depends on (BF52x || BF54x)
259 depends on (BF52x || BF537 || BF536 || BF534 || BF54x)
263 depends on (BF561 || BF537 || BF536 || BF534 || BF533 || BF532 || BF531)
267 depends on (BF561 || BF533 || BF532 || BF531 || BF538 || BF539)
271 depends on (BF561 || BF533 || BF532 || BF531 || BF538 || BF539)
275 depends on (BF533 || BF532 || BF531)
287 depends on (BF512 || BF514 || BF516 || BF518)
292 depends on (BF522 || BF523 || BF524 || BF525 || BF526 || BF527)
297 depends on (BF531 || BF532 || BF533 || BF534 || BF536 || BF537)
302 depends on (BF542 || BF544 || BF547 || BF548 || BF549)
305 config MEM_GENERIC_BOARD
307 depends on GENERIC_BOARD
310 config MEM_MT48LC64M4A2FB_7E
312 depends on (BFIN533_STAMP)
315 config MEM_MT48LC16M16A2TG_75
317 depends on (BFIN533_EZKIT || BFIN561_EZKIT \
318 || BFIN533_BLUETECHNIX_CM || BFIN537_BLUETECHNIX_CM \
319 || H8606_HVSISTEMAS || BFIN527_BLUETECHNIX_CM)
322 config MEM_MT48LC32M8A2_75
324 depends on (BFIN537_STAMP || PNAV10 || BFIN538_EZKIT)
327 config MEM_MT48LC8M32B2B5_7
329 depends on (BFIN561_BLUETECHNIX_CM)
332 config MEM_MT48LC32M16A2TG_75
334 depends on (BFIN527_EZKIT || BFIN532_IP0X || BLACKSTAMP || BFIN526_EZBRD)
337 source "arch/blackfin/mach-bf518/Kconfig"
338 source "arch/blackfin/mach-bf527/Kconfig"
339 source "arch/blackfin/mach-bf533/Kconfig"
340 source "arch/blackfin/mach-bf561/Kconfig"
341 source "arch/blackfin/mach-bf537/Kconfig"
342 source "arch/blackfin/mach-bf538/Kconfig"
343 source "arch/blackfin/mach-bf548/Kconfig"
345 menu "Board customizations"
348 bool "Default bootloader kernel arguments"
351 string "Initial kernel command string"
352 depends on CMDLINE_BOOL
353 default "console=ttyBF0,57600"
355 If you don't have a boot loader capable of passing a command line string
356 to the kernel, you may specify one here. As a minimum, you should specify
357 the memory size and the root device (e.g., mem=8M, root=/dev/nfs).
360 hex "Kernel load address for booting"
362 range 0x1000 0x20000000
364 This option allows you to set the load address of the kernel.
365 This can be useful if you are on a board which has a small amount
366 of memory or you wish to reserve some memory at the beginning of
369 Note that you need to keep this value above 4k (0x1000) as this
370 memory region is used to capture NULL pointer references as well
371 as some core kernel functions.
374 hex "Kernel ROM Base"
377 range 0x20000000 0x20400000 if !(BF54x || BF561)
378 range 0x20000000 0x30000000 if (BF54x || BF561)
381 comment "Clock/PLL Setup"
384 int "Frequency of the crystal on the board in Hz"
385 default "11059200" if BFIN533_STAMP
386 default "27000000" if BFIN533_EZKIT
387 default "25000000" if (BFIN537_STAMP || BFIN527_EZKIT || H8606_HVSISTEMAS || BLACKSTAMP || BFIN526_EZBRD || BFIN538_EZKIT || BFIN518F-EZBRD)
388 default "30000000" if BFIN561_EZKIT
389 default "24576000" if PNAV10
390 default "10000000" if BFIN532_IP0X
392 The frequency of CLKIN crystal oscillator on the board in Hz.
393 Warning: This value should match the crystal on the board. Otherwise,
394 peripherals won't work properly.
396 config BFIN_KERNEL_CLOCK
397 bool "Re-program Clocks while Kernel boots?"
400 This option decides if kernel clocks are re-programed from the
401 bootloader settings. If the clocks are not set, the SDRAM settings
402 are also not changed, and the Bootloader does 100% of the hardware
407 depends on BFIN_KERNEL_CLOCK
412 depends on BFIN_KERNEL_CLOCK && (! PLL_BYPASS)
415 If this is set the clock will be divided by 2, before it goes to the PLL.
419 depends on BFIN_KERNEL_CLOCK && (! PLL_BYPASS)
421 default "22" if BFIN533_EZKIT
422 default "45" if BFIN533_STAMP
423 default "20" if (BFIN537_STAMP || BFIN527_EZKIT || BFIN548_EZKIT || BFIN548_BLUETECHNIX_CM || BFIN538_EZKIT)
424 default "22" if BFIN533_BLUETECHNIX_CM
425 default "20" if (BFIN537_BLUETECHNIX_CM || BFIN527_BLUETECHNIX_CM || BFIN561_BLUETECHNIX_CM)
426 default "20" if BFIN561_EZKIT
427 default "16" if (H8606_HVSISTEMAS || BLACKSTAMP || BFIN526_EZBRD || BFIN518F_EZBRD)
429 This controls the frequency of the on-chip PLL. This can be between 1 and 64.
430 PLL Frequency = (Crystal Frequency) * (this setting)
433 prompt "Core Clock Divider"
434 depends on BFIN_KERNEL_CLOCK
437 This sets the frequency of the core. It can be 1, 2, 4 or 8
438 Core Frequency = (PLL frequency) / (this setting)
454 int "System Clock Divider"
455 depends on BFIN_KERNEL_CLOCK
459 This sets the frequency of the system clock (including SDRAM or DDR).
460 This can be between 1 and 15
461 System Clock = (PLL frequency) / (this setting)
464 prompt "DDR SDRAM Chip Type"
465 depends on BFIN_KERNEL_CLOCK
467 default MEM_MT46V32M16_5B
469 config MEM_MT46V32M16_6T
472 config MEM_MT46V32M16_5B
477 int "Max SDRAM Memory Size in MBytes"
481 This is the max memory size that the kernel will create CPLB
482 tables for. Your system will not be able to handle any more.
485 # Max & Min Speeds for various Chips
489 default 400000000 if BF512
490 default 400000000 if BF514
491 default 400000000 if BF516
492 default 400000000 if BF518
493 default 600000000 if BF522
494 default 400000000 if BF523
495 default 400000000 if BF524
496 default 600000000 if BF525
497 default 400000000 if BF526
498 default 600000000 if BF527
499 default 400000000 if BF531
500 default 400000000 if BF532
501 default 750000000 if BF533
502 default 500000000 if BF534
503 default 400000000 if BF536
504 default 600000000 if BF537
505 default 533333333 if BF538
506 default 533333333 if BF539
507 default 600000000 if BF542
508 default 533333333 if BF544
509 default 600000000 if BF547
510 default 600000000 if BF548
511 default 533333333 if BF549
512 default 600000000 if BF561
526 comment "Kernel Timer/Scheduler"
528 source kernel/Kconfig.hz
535 config GENERIC_CLOCKEVENTS
536 bool "Generic clock events"
537 depends on GENERIC_TIME
540 config CYCLES_CLOCKSOURCE
541 bool "Use 'CYCLES' as a clocksource (EXPERIMENTAL)"
542 depends on EXPERIMENTAL
543 depends on GENERIC_CLOCKEVENTS
544 depends on !BFIN_SCRATCH_REG_CYCLES
547 If you say Y here, you will enable support for using the 'cycles'
548 registers as a clock source. Doing so means you will be unable to
549 safely write to the 'cycles' register during runtime. You will
550 still be able to read it (such as for performance monitoring), but
551 writing the registers will most likely crash the kernel.
553 source kernel/time/Kconfig
558 prompt "Blackfin Exception Scratch Register"
559 default BFIN_SCRATCH_REG_RETN
561 Select the resource to reserve for the Exception handler:
562 - RETN: Non-Maskable Interrupt (NMI)
563 - RETE: Exception Return (JTAG/ICE)
564 - CYCLES: Performance counter
566 If you are unsure, please select "RETN".
568 config BFIN_SCRATCH_REG_RETN
571 Use the RETN register in the Blackfin exception handler
572 as a stack scratch register. This means you cannot
573 safely use NMI on the Blackfin while running Linux, but
574 you can debug the system with a JTAG ICE and use the
575 CYCLES performance registers.
577 If you are unsure, please select "RETN".
579 config BFIN_SCRATCH_REG_RETE
582 Use the RETE register in the Blackfin exception handler
583 as a stack scratch register. This means you cannot
584 safely use a JTAG ICE while debugging a Blackfin board,
585 but you can safely use the CYCLES performance registers
588 If you are unsure, please select "RETN".
590 config BFIN_SCRATCH_REG_CYCLES
593 Use the CYCLES register in the Blackfin exception handler
594 as a stack scratch register. This means you cannot
595 safely use the CYCLES performance registers on a Blackfin
596 board at anytime, but you can debug the system with a JTAG
599 If you are unsure, please select "RETN".
606 menu "Blackfin Kernel Optimizations"
609 comment "Memory Optimizations"
612 bool "Locate interrupt entry code in L1 Memory"
615 If enabled, interrupt entry code (STORE/RESTORE CONTEXT) is linked
616 into L1 instruction memory. (less latency)
618 config EXCPT_IRQ_SYSC_L1
619 bool "Locate entire ASM lowlevel exception / interrupt - Syscall and CPLB handler code in L1 Memory"
622 If enabled, the entire ASM lowlevel exception and interrupt entry code
623 (STORE/RESTORE CONTEXT) is linked into L1 instruction memory.
627 bool "Locate frequently called do_irq dispatcher function in L1 Memory"
630 If enabled, the frequently called do_irq dispatcher function is linked
631 into L1 instruction memory. (less latency)
633 config CORE_TIMER_IRQ_L1
634 bool "Locate frequently called timer_interrupt() function in L1 Memory"
637 If enabled, the frequently called timer_interrupt() function is linked
638 into L1 instruction memory. (less latency)
641 bool "Locate frequently idle function in L1 Memory"
644 If enabled, the frequently called idle function is linked
645 into L1 instruction memory. (less latency)
648 bool "Locate kernel schedule function in L1 Memory"
651 If enabled, the frequently called kernel schedule is linked
652 into L1 instruction memory. (less latency)
654 config ARITHMETIC_OPS_L1
655 bool "Locate kernel owned arithmetic functions in L1 Memory"
658 If enabled, arithmetic functions are linked
659 into L1 instruction memory. (less latency)
662 bool "Locate access_ok function in L1 Memory"
665 If enabled, the access_ok function is linked
666 into L1 instruction memory. (less latency)
669 bool "Locate memset function in L1 Memory"
672 If enabled, the memset function is linked
673 into L1 instruction memory. (less latency)
676 bool "Locate memcpy function in L1 Memory"
679 If enabled, the memcpy function is linked
680 into L1 instruction memory. (less latency)
682 config SYS_BFIN_SPINLOCK_L1
683 bool "Locate sys_bfin_spinlock function in L1 Memory"
686 If enabled, sys_bfin_spinlock function is linked
687 into L1 instruction memory. (less latency)
689 config IP_CHECKSUM_L1
690 bool "Locate IP Checksum function in L1 Memory"
693 If enabled, the IP Checksum function is linked
694 into L1 instruction memory. (less latency)
696 config CACHELINE_ALIGNED_L1
697 bool "Locate cacheline_aligned data to L1 Data Memory"
702 If enabled, cacheline_anligned data is linked
703 into L1 data memory. (less latency)
705 config SYSCALL_TAB_L1
706 bool "Locate Syscall Table L1 Data Memory"
710 If enabled, the Syscall LUT is linked
711 into L1 data memory. (less latency)
713 config CPLB_SWITCH_TAB_L1
714 bool "Locate CPLB Switch Tables L1 Data Memory"
718 If enabled, the CPLB Switch Tables are linked
719 into L1 data memory. (less latency)
722 bool "Support locating application stack in L1 Scratch Memory"
725 If enabled the application stack can be located in L1
726 scratch memory (less latency).
728 Currently only works with FLAT binaries.
730 config EXCEPTION_L1_SCRATCH
731 bool "Locate exception stack in L1 Scratch Memory"
733 depends on !APP_STACK_L1 && !SYSCALL_TAB_L1
735 Whenever an exception occurs, use the L1 Scratch memory for
736 stack storage. You cannot place the stacks of FLAT binaries
737 in L1 when using this option.
739 If you don't use L1 Scratch, then you should say Y here.
741 comment "Speed Optimizations"
742 config BFIN_INS_LOWOVERHEAD
743 bool "ins[bwl] low overhead, higher interrupt latency"
746 Reads on the Blackfin are speculative. In Blackfin terms, this means
747 they can be interrupted at any time (even after they have been issued
748 on to the external bus), and re-issued after the interrupt occurs.
749 For memory - this is not a big deal, since memory does not change if
752 If a FIFO is sitting on the end of the read, it will see two reads,
753 when the core only sees one since the FIFO receives both the read
754 which is cancelled (and not delivered to the core) and the one which
755 is re-issued (which is delivered to the core).
757 To solve this, interrupts are turned off before reads occur to
758 I/O space. This option controls which the overhead/latency of
759 controlling interrupts during this time
760 "n" turns interrupts off every read
761 (higher overhead, but lower interrupt latency)
762 "y" turns interrupts off every loop
763 (low overhead, but longer interrupt latency)
765 default behavior is to leave this set to on (type "Y"). If you are experiencing
766 interrupt latency issues, it is safe and OK to turn this off.
771 prompt "Kernel executes from"
773 Choose the memory type that the kernel will be running in.
778 The kernel will be resident in RAM when running.
783 The kernel will be resident in FLASH/ROM when running.
790 tristate "Enable Blackfin General Purpose Timers API"
793 Enable support for the General Purpose Timers API. If you
796 To compile this driver as a module, choose M here: the module
797 will be called gptimers.ko.
800 prompt "Uncached DMA region"
801 default DMA_UNCACHED_1M
802 config DMA_UNCACHED_4M
803 bool "Enable 4M DMA region"
804 config DMA_UNCACHED_2M
805 bool "Enable 2M DMA region"
806 config DMA_UNCACHED_1M
807 bool "Enable 1M DMA region"
808 config DMA_UNCACHED_NONE
809 bool "Disable DMA region"
813 comment "Cache Support"
818 config BFIN_DCACHE_BANKA
819 bool "Enable only 16k BankA DCACHE - BankB is SRAM"
820 depends on BFIN_DCACHE && !BF531
822 config BFIN_ICACHE_LOCK
823 bool "Enable Instruction Cache Locking"
827 depends on BFIN_DCACHE
828 default BFIN_WB if !SMP
829 default BFIN_WT if SMP
835 Cached data will be written back to SDRAM only when needed.
836 This can give a nice increase in performance, but beware of
837 broken drivers that do not properly invalidate/flush their
840 Write Through Policy:
841 Cached data will always be written back to SDRAM when the
842 cache is updated. This is a completely safe setting, but
843 performance is worse than Write Back.
845 If you are unsure of the options and you want to be safe,
846 then go with Write Through.
852 Cached data will be written back to SDRAM only when needed.
853 This can give a nice increase in performance, but beware of
854 broken drivers that do not properly invalidate/flush their
857 Write Through Policy:
858 Cached data will always be written back to SDRAM when the
859 cache is updated. This is a completely safe setting, but
860 performance is worse than Write Back.
862 If you are unsure of the options and you want to be safe,
863 then go with Write Through.
867 config BFIN_L2_CACHEABLE
869 depends on (BFIN_DCACHE || BFIN_ICACHE) && (BF54x || BF561)
872 Select to make L2 SRAM cacheable in L1 data and instruction cache.
875 bool "Enable the memory protection unit (EXPERIMENTAL)"
878 Use the processor's MPU to protect applications from accessing
879 memory they do not own. This comes at a performance penalty
880 and is recommended only for debugging.
882 comment "Asynchonous Memory Configuration"
884 menu "EBIU_AMGCTL Global Control"
890 bool "DMA has priority over core for ext. accesses"
895 bool "Bank 0 16 bit packing enable"
900 bool "Bank 1 16 bit packing enable"
905 bool "Bank 2 16 bit packing enable"
910 bool "Bank 3 16 bit packing enable"
914 prompt"Enable Asynchonous Memory Banks"
918 bool "Disable All Banks"
924 bool "Enable Bank 0 & 1"
926 config C_AMBEN_B0_B1_B2
927 bool "Enable Bank 0 & 1 & 2"
930 bool "Enable All Banks"
934 menu "EBIU_AMBCTL Control"
942 default 0x5558 if BF54x
953 config EBIU_MBSCTLVAL
954 hex "EBIU Bank Select Control Register"
959 hex "Flash Memory Mode Control Register"
964 hex "Flash Memory Bank Control Register"
969 #############################################################################
970 menu "Bus options (PCI, PCMCIA, EISA, MCA, ISA)"
978 source "drivers/pci/Kconfig"
981 bool "Support for hot-pluggable device"
983 Say Y here if you want to plug devices into your computer while
984 the system is running, and be able to use them quickly. In many
985 cases, the devices can likewise be unplugged at any time too.
987 One well known example of this is PCMCIA- or PC-cards, credit-card
988 size devices such as network cards, modems or hard drives which are
989 plugged into slots found on all modern laptop computers. Another
990 example, used on modern desktops as well as laptops, is USB.
992 Enable HOTPLUG and build a modular kernel. Get agent software
993 (from <http://linux-hotplug.sourceforge.net/>) and install it.
994 Then your kernel will automatically call out to a user mode "policy
995 agent" (/sbin/hotplug) to load modules and set up software needed
996 to use devices as you hotplug them.
998 source "drivers/pcmcia/Kconfig"
1000 source "drivers/pci/hotplug/Kconfig"
1004 menu "Executable file formats"
1006 source "fs/Kconfig.binfmt"
1010 menu "Power management options"
1011 source "kernel/power/Kconfig"
1013 config ARCH_SUSPEND_POSSIBLE
1018 prompt "Standby Power Saving Mode"
1020 default PM_BFIN_SLEEP_DEEPER
1021 config PM_BFIN_SLEEP_DEEPER
1024 Sleep "Deeper" Mode (High Power Savings) - This mode reduces dynamic
1025 power dissipation by disabling the clock to the processor core (CCLK).
1026 Furthermore, Standby sets the internal power supply voltage (VDDINT)
1027 to 0.85 V to provide the greatest power savings, while preserving the
1029 The PLL and system clock (SCLK) continue to operate at a very low
1030 frequency of about 3.3 MHz. To preserve data integrity in the SDRAM,
1031 the SDRAM is put into Self Refresh Mode. Typically an external event
1032 such as GPIO interrupt or RTC activity wakes up the processor.
1033 Various Peripherals such as UART, SPORT, PPI may not function as
1034 normal during Sleep Deeper, due to the reduced SCLK frequency.
1035 When in the sleep mode, system DMA access to L1 memory is not supported.
1037 If unsure, select "Sleep Deeper".
1039 config PM_BFIN_SLEEP
1042 Sleep Mode (High Power Savings) - The sleep mode reduces power
1043 dissipation by disabling the clock to the processor core (CCLK).
1044 The PLL and system clock (SCLK), however, continue to operate in
1045 this mode. Typically an external event or RTC activity will wake
1046 up the processor. When in the sleep mode, system DMA access to L1
1047 memory is not supported.
1049 If unsure, select "Sleep Deeper".
1052 config PM_WAKEUP_BY_GPIO
1053 bool "Allow Wakeup from Standby by GPIO"
1055 config PM_WAKEUP_GPIO_NUMBER
1058 depends on PM_WAKEUP_BY_GPIO
1062 prompt "GPIO Polarity"
1063 depends on PM_WAKEUP_BY_GPIO
1064 default PM_WAKEUP_GPIO_POLAR_H
1065 config PM_WAKEUP_GPIO_POLAR_H
1067 config PM_WAKEUP_GPIO_POLAR_L
1069 config PM_WAKEUP_GPIO_POLAR_EDGE_F
1071 config PM_WAKEUP_GPIO_POLAR_EDGE_R
1073 config PM_WAKEUP_GPIO_POLAR_EDGE_B
1077 comment "Possible Suspend Mem / Hibernate Wake-Up Sources"
1080 config PM_BFIN_WAKE_PH6
1081 bool "Allow Wake-Up from on-chip PHY or PH6 GP"
1082 depends on PM && (BF51x || BF52x || BF534 || BF536 || BF537)
1085 Enable PHY and PH6 GP Wake-Up (Voltage Regulator Power-Up)
1087 config PM_BFIN_WAKE_GP
1088 bool "Allow Wake-Up from GPIOs"
1089 depends on PM && BF54x
1092 Enable General-Purpose Wake-Up (Voltage Regulator Power-Up)
1095 menu "CPU Frequency scaling"
1097 source "drivers/cpufreq/Kconfig"
1099 config BFIN_CPU_FREQ
1102 select CPU_FREQ_TABLE
1106 bool "CPU Voltage scaling"
1107 depends on EXPERIMENTAL
1111 Say Y here if you want CPU voltage scaling according to the CPU frequency.
1112 This option violates the PLL BYPASS recommendation in the Blackfin Processor
1113 manuals. There is a theoretical risk that during VDDINT transitions
1118 source "net/Kconfig"
1120 source "drivers/Kconfig"
1124 source "arch/blackfin/Kconfig.debug"
1126 source "security/Kconfig"
1128 source "crypto/Kconfig"
1130 source "lib/Kconfig"