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
34 config GENERIC_FIND_NEXT_BIT
38 config GENERIC_HWEIGHT
42 config GENERIC_HARDIRQS
46 config GENERIC_IRQ_PROBE
54 config FORCE_MAX_ZONEORDER
58 config GENERIC_CALIBRATE_DELAY
67 source "kernel/Kconfig.preempt"
69 menu "Blackfin Processor Options"
71 comment "Processor and Board Settings"
80 BF522 Processor Support.
85 BF523 Processor Support.
90 BF524 Processor Support.
95 BF525 Processor Support.
100 BF526 Processor Support.
105 BF527 Processor Support.
110 BF531 Processor Support.
115 BF532 Processor Support.
120 BF533 Processor Support.
125 BF534 Processor Support.
130 BF536 Processor Support.
135 BF537 Processor Support.
140 BF542 Processor Support.
145 BF544 Processor Support.
150 BF547 Processor Support.
155 BF548 Processor Support.
160 BF549 Processor Support.
165 Not Supported Yet - Work in progress - BF561 Processor Support.
171 default BF_REV_0_1 if BF527
172 default BF_REV_0_2 if BF537
173 default BF_REV_0_3 if BF533
174 default BF_REV_0_0 if BF549
178 depends on (BF52x || BF54x)
182 depends on (BF52x || BF54x)
186 depends on (BF537 || BF536 || BF534)
190 depends on (BF561 || BF537 || BF536 || BF534 || BF533 || BF532 || BF531)
194 depends on (BF561 || BF533 || BF532 || BF531)
198 depends on (BF561 || BF533 || BF532 || BF531)
210 depends on (BF522 || BF523 || BF524 || BF525 || BF526 || BF527)
215 depends on (BF531 || BF532 || BF533 || BF534 || BF536 || BF537)
220 depends on (BF542 || BF544 || BF547 || BF548 || BF549)
223 config MEM_GENERIC_BOARD
225 depends on GENERIC_BOARD
228 config MEM_MT48LC64M4A2FB_7E
230 depends on (BFIN533_STAMP)
233 config MEM_MT48LC16M16A2TG_75
235 depends on (BFIN533_EZKIT || BFIN561_EZKIT \
236 || BFIN533_BLUETECHNIX_CM || BFIN537_BLUETECHNIX_CM \
237 || H8606_HVSISTEMAS || BFIN527_BLUETECHNIX_CM)
240 config MEM_MT48LC32M8A2_75
242 depends on (BFIN537_STAMP || PNAV10)
245 config MEM_MT48LC8M32B2B5_7
247 depends on (BFIN561_BLUETECHNIX_CM)
250 config MEM_MT48LC32M16A2TG_75
252 depends on (BFIN527_EZKIT || BFIN532_IP0X || BLACKSTAMP)
255 source "arch/blackfin/mach-bf527/Kconfig"
256 source "arch/blackfin/mach-bf533/Kconfig"
257 source "arch/blackfin/mach-bf561/Kconfig"
258 source "arch/blackfin/mach-bf537/Kconfig"
259 source "arch/blackfin/mach-bf548/Kconfig"
261 menu "Board customizations"
264 bool "Default bootloader kernel arguments"
267 string "Initial kernel command string"
268 depends on CMDLINE_BOOL
269 default "console=ttyBF0,57600"
271 If you don't have a boot loader capable of passing a command line string
272 to the kernel, you may specify one here. As a minimum, you should specify
273 the memory size and the root device (e.g., mem=8M, root=/dev/nfs).
276 hex "Kernel load address for booting"
278 range 0x1000 0x20000000
280 This option allows you to set the load address of the kernel.
281 This can be useful if you are on a board which has a small amount
282 of memory or you wish to reserve some memory at the beginning of
285 Note that you need to keep this value above 4k (0x1000) as this
286 memory region is used to capture NULL pointer references as well
287 as some core kernel functions.
289 comment "Clock/PLL Setup"
292 int "Frequency of the crystal on the board in Hz"
293 default "11059200" if BFIN533_STAMP
294 default "27000000" if BFIN533_EZKIT
295 default "25000000" if (BFIN537_STAMP || BFIN527_EZKIT || H8606_HVSISTEMAS || BLACKSTAMP)
296 default "30000000" if BFIN561_EZKIT
297 default "24576000" if PNAV10
298 default "10000000" if BFIN532_IP0X
300 The frequency of CLKIN crystal oscillator on the board in Hz.
301 Warning: This value should match the crystal on the board. Otherwise,
302 peripherals won't work properly.
304 config BFIN_KERNEL_CLOCK
305 bool "Re-program Clocks while Kernel boots?"
308 This option decides if kernel clocks are re-programed from the
309 bootloader settings. If the clocks are not set, the SDRAM settings
310 are also not changed, and the Bootloader does 100% of the hardware
315 depends on BFIN_KERNEL_CLOCK
320 depends on BFIN_KERNEL_CLOCK && (! PLL_BYPASS)
323 If this is set the clock will be divided by 2, before it goes to the PLL.
327 depends on BFIN_KERNEL_CLOCK && (! PLL_BYPASS)
329 default "22" if BFIN533_EZKIT
330 default "45" if BFIN533_STAMP
331 default "20" if (BFIN537_STAMP || BFIN527_EZKIT || BFIN548_EZKIT || BFIN548_BLUETECHNIX_CM)
332 default "22" if BFIN533_BLUETECHNIX_CM
333 default "20" if (BFIN537_BLUETECHNIX_CM || BFIN527_BLUETECHNIX_CM || BFIN561_BLUETECHNIX_CM)
334 default "20" if BFIN561_EZKIT
335 default "16" if (H8606_HVSISTEMAS || BLACKSTAMP)
337 This controls the frequency of the on-chip PLL. This can be between 1 and 64.
338 PLL Frequency = (Crystal Frequency) * (this setting)
341 prompt "Core Clock Divider"
342 depends on BFIN_KERNEL_CLOCK
345 This sets the frequency of the core. It can be 1, 2, 4 or 8
346 Core Frequency = (PLL frequency) / (this setting)
362 int "System Clock Divider"
363 depends on BFIN_KERNEL_CLOCK
367 This sets the frequency of the system clock (including SDRAM or DDR).
368 This can be between 1 and 15
369 System Clock = (PLL frequency) / (this setting)
372 int "Max SDRAM Memory Size in MBytes"
376 This is the max memory size that the kernel will create CPLB
377 tables for. Your system will not be able to handle any more.
380 prompt "DDR SDRAM Chip Type"
381 depends on BFIN_KERNEL_CLOCK
383 default MEM_MT46V32M16_5B
385 config MEM_MT46V32M16_6T
388 config MEM_MT46V32M16_5B
393 # Max & Min Speeds for various Chips
397 default 600000000 if BF522
398 default 400000000 if BF523
399 default 400000000 if BF524
400 default 600000000 if BF525
401 default 400000000 if BF526
402 default 600000000 if BF527
403 default 400000000 if BF531
404 default 400000000 if BF532
405 default 750000000 if BF533
406 default 500000000 if BF534
407 default 400000000 if BF536
408 default 600000000 if BF537
409 default 533333333 if BF538
410 default 533333333 if BF539
411 default 600000000 if BF542
412 default 533333333 if BF544
413 default 600000000 if BF547
414 default 600000000 if BF548
415 default 533333333 if BF549
416 default 600000000 if BF561
430 comment "Kernel Timer/Scheduler"
432 source kernel/Kconfig.hz
438 config GENERIC_CLOCKEVENTS
439 bool "Generic clock events"
440 depends on GENERIC_TIME
443 config CYCLES_CLOCKSOURCE
444 bool "Use 'CYCLES' as a clocksource (EXPERIMENTAL)"
445 depends on EXPERIMENTAL
446 depends on GENERIC_CLOCKEVENTS
447 depends on !BFIN_SCRATCH_REG_CYCLES
450 If you say Y here, you will enable support for using the 'cycles'
451 registers as a clock source. Doing so means you will be unable to
452 safely write to the 'cycles' register during runtime. You will
453 still be able to read it (such as for performance monitoring), but
454 writing the registers will most likely crash the kernel.
456 source kernel/time/Kconfig
458 comment "Memory Setup"
463 prompt "Blackfin Exception Scratch Register"
464 default BFIN_SCRATCH_REG_RETN
466 Select the resource to reserve for the Exception handler:
467 - RETN: Non-Maskable Interrupt (NMI)
468 - RETE: Exception Return (JTAG/ICE)
469 - CYCLES: Performance counter
471 If you are unsure, please select "RETN".
473 config BFIN_SCRATCH_REG_RETN
476 Use the RETN register in the Blackfin exception handler
477 as a stack scratch register. This means you cannot
478 safely use NMI on the Blackfin while running Linux, but
479 you can debug the system with a JTAG ICE and use the
480 CYCLES performance registers.
482 If you are unsure, please select "RETN".
484 config BFIN_SCRATCH_REG_RETE
487 Use the RETE register in the Blackfin exception handler
488 as a stack scratch register. This means you cannot
489 safely use a JTAG ICE while debugging a Blackfin board,
490 but you can safely use the CYCLES performance registers
493 If you are unsure, please select "RETN".
495 config BFIN_SCRATCH_REG_CYCLES
498 Use the CYCLES register in the Blackfin exception handler
499 as a stack scratch register. This means you cannot
500 safely use the CYCLES performance registers on a Blackfin
501 board at anytime, but you can debug the system with a JTAG
504 If you are unsure, please select "RETN".
511 menu "Blackfin Kernel Optimizations"
513 comment "Memory Optimizations"
516 bool "Locate interrupt entry code in L1 Memory"
519 If enabled, interrupt entry code (STORE/RESTORE CONTEXT) is linked
520 into L1 instruction memory. (less latency)
522 config EXCPT_IRQ_SYSC_L1
523 bool "Locate entire ASM lowlevel exception / interrupt - Syscall and CPLB handler code in L1 Memory"
526 If enabled, the entire ASM lowlevel exception and interrupt entry code
527 (STORE/RESTORE CONTEXT) is linked into L1 instruction memory.
531 bool "Locate frequently called do_irq dispatcher function in L1 Memory"
534 If enabled, the frequently called do_irq dispatcher function is linked
535 into L1 instruction memory. (less latency)
537 config CORE_TIMER_IRQ_L1
538 bool "Locate frequently called timer_interrupt() function in L1 Memory"
541 If enabled, the frequently called timer_interrupt() function is linked
542 into L1 instruction memory. (less latency)
545 bool "Locate frequently idle function in L1 Memory"
548 If enabled, the frequently called idle function is linked
549 into L1 instruction memory. (less latency)
552 bool "Locate kernel schedule function in L1 Memory"
555 If enabled, the frequently called kernel schedule is linked
556 into L1 instruction memory. (less latency)
558 config ARITHMETIC_OPS_L1
559 bool "Locate kernel owned arithmetic functions in L1 Memory"
562 If enabled, arithmetic functions are linked
563 into L1 instruction memory. (less latency)
566 bool "Locate access_ok function in L1 Memory"
569 If enabled, the access_ok function is linked
570 into L1 instruction memory. (less latency)
573 bool "Locate memset function in L1 Memory"
576 If enabled, the memset function is linked
577 into L1 instruction memory. (less latency)
580 bool "Locate memcpy function in L1 Memory"
583 If enabled, the memcpy function is linked
584 into L1 instruction memory. (less latency)
586 config SYS_BFIN_SPINLOCK_L1
587 bool "Locate sys_bfin_spinlock function in L1 Memory"
590 If enabled, sys_bfin_spinlock function is linked
591 into L1 instruction memory. (less latency)
593 config IP_CHECKSUM_L1
594 bool "Locate IP Checksum function in L1 Memory"
597 If enabled, the IP Checksum function is linked
598 into L1 instruction memory. (less latency)
600 config CACHELINE_ALIGNED_L1
601 bool "Locate cacheline_aligned data to L1 Data Memory"
606 If enabled, cacheline_anligned data is linked
607 into L1 data memory. (less latency)
609 config SYSCALL_TAB_L1
610 bool "Locate Syscall Table L1 Data Memory"
614 If enabled, the Syscall LUT is linked
615 into L1 data memory. (less latency)
617 config CPLB_SWITCH_TAB_L1
618 bool "Locate CPLB Switch Tables L1 Data Memory"
622 If enabled, the CPLB Switch Tables are linked
623 into L1 data memory. (less latency)
625 comment "Speed Optimizations"
626 config BFIN_INS_LOWOVERHEAD
627 bool "ins[bwl] low overhead, higher interrupt latency"
630 Reads on the Blackfin are speculative. In Blackfin terms, this means
631 they can be interrupted at any time (even after they have been issued
632 on to the external bus), and re-issued after the interrupt occurs.
633 For memory - this is not a big deal, since memory does not change if
636 If a FIFO is sitting on the end of the read, it will see two reads,
637 when the core only sees one since the FIFO receives both the read
638 which is cancelled (and not delivered to the core) and the one which
639 is re-issued (which is delivered to the core).
641 To solve this, interrupts are turned off before reads occur to
642 I/O space. This option controls which the overhead/latency of
643 controlling interrupts during this time
644 "n" turns interrupts off every read
645 (higher overhead, but lower interrupt latency)
646 "y" turns interrupts off every loop
647 (low overhead, but longer interrupt latency)
649 default behavior is to leave this set to on (type "Y"). If you are experiencing
650 interrupt latency issues, it is safe and OK to turn this off.
656 prompt "Kernel executes from"
658 Choose the memory type that the kernel will be running in.
663 The kernel will be resident in RAM when running.
668 The kernel will be resident in FLASH/ROM when running.
675 tristate "Enable Blackfin General Purpose Timers API"
678 Enable support for the General Purpose Timers API. If you
681 To compile this driver as a module, choose M here: the module
682 will be called gptimers.ko.
685 bool "Enable DMA Support"
686 depends on (BF52x || BF53x || BF561 || BF54x)
689 DMA driver for BF5xx.
692 prompt "Uncached SDRAM region"
693 default DMA_UNCACHED_1M
694 depends on BFIN_DMA_5XX
695 config DMA_UNCACHED_4M
696 bool "Enable 4M DMA region"
697 config DMA_UNCACHED_2M
698 bool "Enable 2M DMA region"
699 config DMA_UNCACHED_1M
700 bool "Enable 1M DMA region"
701 config DMA_UNCACHED_NONE
702 bool "Disable DMA region"
706 comment "Cache Support"
711 config BFIN_DCACHE_BANKA
712 bool "Enable only 16k BankA DCACHE - BankB is SRAM"
713 depends on BFIN_DCACHE && !BF531
715 config BFIN_ICACHE_LOCK
716 bool "Enable Instruction Cache Locking"
720 depends on BFIN_DCACHE
726 Cached data will be written back to SDRAM only when needed.
727 This can give a nice increase in performance, but beware of
728 broken drivers that do not properly invalidate/flush their
731 Write Through Policy:
732 Cached data will always be written back to SDRAM when the
733 cache is updated. This is a completely safe setting, but
734 performance is worse than Write Back.
736 If you are unsure of the options and you want to be safe,
737 then go with Write Through.
743 Cached data will be written back to SDRAM only when needed.
744 This can give a nice increase in performance, but beware of
745 broken drivers that do not properly invalidate/flush their
748 Write Through Policy:
749 Cached data will always be written back to SDRAM when the
750 cache is updated. This is a completely safe setting, but
751 performance is worse than Write Back.
753 If you are unsure of the options and you want to be safe,
754 then go with Write Through.
759 bool "Enable the memory protection unit (EXPERIMENTAL)"
762 Use the processor's MPU to protect applications from accessing
763 memory they do not own. This comes at a performance penalty
764 and is recommended only for debugging.
766 comment "Asynchonous Memory Configuration"
768 menu "EBIU_AMGCTL Global Control"
774 bool "DMA has priority over core for ext. accesses"
779 bool "Bank 0 16 bit packing enable"
784 bool "Bank 1 16 bit packing enable"
789 bool "Bank 2 16 bit packing enable"
794 bool "Bank 3 16 bit packing enable"
798 prompt"Enable Asynchonous Memory Banks"
802 bool "Disable All Banks"
808 bool "Enable Bank 0 & 1"
810 config C_AMBEN_B0_B1_B2
811 bool "Enable Bank 0 & 1 & 2"
814 bool "Enable All Banks"
818 menu "EBIU_AMBCTL Control"
826 default 0x5558 if BF54x
837 config EBIU_MBSCTLVAL
838 hex "EBIU Bank Select Control Register"
843 hex "Flash Memory Mode Control Register"
848 hex "Flash Memory Bank Control Register"
853 #############################################################################
854 menu "Bus options (PCI, PCMCIA, EISA, MCA, ISA)"
861 source "drivers/pci/Kconfig"
864 bool "Support for hot-pluggable device"
866 Say Y here if you want to plug devices into your computer while
867 the system is running, and be able to use them quickly. In many
868 cases, the devices can likewise be unplugged at any time too.
870 One well known example of this is PCMCIA- or PC-cards, credit-card
871 size devices such as network cards, modems or hard drives which are
872 plugged into slots found on all modern laptop computers. Another
873 example, used on modern desktops as well as laptops, is USB.
875 Enable HOTPLUG and build a modular kernel. Get agent software
876 (from <http://linux-hotplug.sourceforge.net/>) and install it.
877 Then your kernel will automatically call out to a user mode "policy
878 agent" (/sbin/hotplug) to load modules and set up software needed
879 to use devices as you hotplug them.
881 source "drivers/pcmcia/Kconfig"
883 source "drivers/pci/hotplug/Kconfig"
887 menu "Executable file formats"
889 source "fs/Kconfig.binfmt"
893 menu "Power management options"
894 source "kernel/power/Kconfig"
896 config ARCH_SUSPEND_POSSIBLE
901 prompt "Standby Power Saving Mode"
903 default PM_BFIN_SLEEP_DEEPER
904 config PM_BFIN_SLEEP_DEEPER
907 Sleep "Deeper" Mode (High Power Savings) - This mode reduces dynamic
908 power dissipation by disabling the clock to the processor core (CCLK).
909 Furthermore, Standby sets the internal power supply voltage (VDDINT)
910 to 0.85 V to provide the greatest power savings, while preserving the
912 The PLL and system clock (SCLK) continue to operate at a very low
913 frequency of about 3.3 MHz. To preserve data integrity in the SDRAM,
914 the SDRAM is put into Self Refresh Mode. Typically an external event
915 such as GPIO interrupt or RTC activity wakes up the processor.
916 Various Peripherals such as UART, SPORT, PPI may not function as
917 normal during Sleep Deeper, due to the reduced SCLK frequency.
918 When in the sleep mode, system DMA access to L1 memory is not supported.
920 If unsure, select "Sleep Deeper".
925 Sleep Mode (High Power Savings) - The sleep mode reduces power
926 dissipation by disabling the clock to the processor core (CCLK).
927 The PLL and system clock (SCLK), however, continue to operate in
928 this mode. Typically an external event or RTC activity will wake
929 up the processor. When in the sleep mode, system DMA access to L1
930 memory is not supported.
932 If unsure, select "Sleep Deeper".
935 config PM_WAKEUP_BY_GPIO
936 bool "Allow Wakeup from Standby by GPIO"
938 config PM_WAKEUP_GPIO_NUMBER
941 depends on PM_WAKEUP_BY_GPIO
942 default 2 if BFIN537_STAMP
945 prompt "GPIO Polarity"
946 depends on PM_WAKEUP_BY_GPIO
947 default PM_WAKEUP_GPIO_POLAR_H
948 config PM_WAKEUP_GPIO_POLAR_H
950 config PM_WAKEUP_GPIO_POLAR_L
952 config PM_WAKEUP_GPIO_POLAR_EDGE_F
954 config PM_WAKEUP_GPIO_POLAR_EDGE_R
956 config PM_WAKEUP_GPIO_POLAR_EDGE_B
960 comment "Possible Suspend Mem / Hibernate Wake-Up Sources"
963 config PM_BFIN_WAKE_PH6
964 bool "Allow Wake-Up from on-chip PHY or PH6 GP"
965 depends on PM && (BF52x || BF534 || BF536 || BF537)
968 Enable PHY and PH6 GP Wake-Up (Voltage Regulator Power-Up)
970 config PM_BFIN_WAKE_GP
971 bool "Allow Wake-Up from GPIOs"
972 depends on PM && BF54x
975 Enable General-Purpose Wake-Up (Voltage Regulator Power-Up)
978 menu "CPU Frequency scaling"
980 source "drivers/cpufreq/Kconfig"
983 bool "CPU Voltage scaling"
984 depends on EXPERIMENTAL
988 Say Y here if you want CPU voltage scaling according to the CPU frequency.
989 This option violates the PLL BYPASS recommendation in the Blackfin Processor
990 manuals. There is a theoretical risk that during VDDINT transitions
997 source "drivers/Kconfig"
1001 source "arch/blackfin/Kconfig.debug"
1003 source "security/Kconfig"
1005 source "crypto/Kconfig"
1007 source "lib/Kconfig"