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2015-10-27arc: use common make variables for dtb buildsRob Herring1-1/+1
Use dtb-y and always make variables to build dtbs instead of explicit dtbs rule. This is in preparation to support building all dtbs. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Vineet Gupta <vgupta@synopsys.com>
2015-07-20ARCv2: add knob for DIV_REV in KconfigAlexey Brodkin1-1/+9
Being highly configurable core ARC HS among other features might be configured with or without DIV_REM_OPTION (hardware divider). That option when enabled adds following instructions: div, divu, rem, remu. By default ARC HS38 has this option enabled. So we add here possibility to disable usage of hardware divider by compiler. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-07-06ARC: Override toplevel default -O2 with -O3Vineet Gupta1-1/+2
ARC kernels have historically been built with -O3, despite top level Makefile defaulting to -O2. This was facilitated by implicitly ordering of arch makefile include AFTER top level assigned -O2. An upstream fix to top level a1c48bb160f ("Makefile: Fix unrecognized cross-compiler command line options") changed the ordering, making ARC -O3 defunct. Fix that by NOT relying on any ordering whatsoever and use the proper arch override facility now present in kbuild (ARCH_*FLAGS) Depends-on: ("kbuild: Allow arch Makefiles to override {cpp,ld,c}flags") Suggested-by: Michal Marek <mmarek@suse.cz> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: stable@vger.kernel.org # 3.16+ Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-28ARC: Fix build failures for ARCompact in linux-next after ARCv2 supportVineet Gupta1-2/+2
Reported-by: Guenter Roeck <private@roeck-us.net> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-28ARCv2: Allow older gcc to cope with new regime of ARCv2/ARCompact supportVineet Gupta1-1/+1
-no-ll64 is specific to ARCv2 ISA, and is obviously not supported by older ARC gcc - in this case the one hosted by linux-next sanity build service. Ensure that it doesn't get included for ISA_ARCOMPACT Reported-by: Guenter Roeck <private@roeck-us.net> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-22ARCv2: Support for ARCv2 ISA and HS38x coresVineet Gupta1-1/+7
The notable features are: - SMP configurations of upto 4 cores with coherency - Optional L2 Cache and IO-Coherency - Revised Interrupt Architecture (multiple priorites, reg banks, auto stack switch, auto regfile save/restore) - MMUv4 (PIPT dcache, Huge Pages) - Instructions for * 64bit load/store: LDD, STD * Hardware assisted divide/remainder: DIV, REM * Function prologue/epilogue: ENTER_S, LEAVE_S * IRQ enable/disable: CLRI, SETI * pop count: FFS, FLS * SETcc, BMSKN, XBFU... Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: [axs101] Add support for AXS101 SDP (software development platform)Alexey Brodkin1-0/+1
The AXS10x platforms consist of a mainboard with peripherals, on which several daughter cards can be placed. The daughter cards typically contain a CPU and memory. Signed-off-by: Mischa Jonker <mjonker@synopsys.com> Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: [plat_arcfpga]->[plat_sim]Vineet Gupta1-2/+2
* Remove remanants of legacy ARC FPGA platforms (AA4, ML509...) * Only nsim simulation platform is left, rename platform accordingly * AA4 DT stuff is compatible with nsim for ARC700 so rename it too Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: RIP broken 64bit RTSCVineet Gupta1-1/+1
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-05-19ARC: switch to simpler CROSS_COMPILE prefixVineet Gupta1-1/+1
ARC GNU tools have had support for arc-linux-* driver for some time now. This is functionally similar to arc-linux-uclibc-* but uclibc prefix seemed weird at best when trying to compile the kernel itself. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-12-17ARC: rename default defconfigVineet Gupta1-1/+1
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2014-10-13ARC: remove gcc mpy heuristicsVineet Gupta1-16/+1
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-06-27ARC: Adjustments for gcc 4.8Vineet Gupta1-8/+16
* DWARF unwinder related + Force DWARF2 compliant .debug_frame (gcc 4.8 defaults to DWARF4 which kernel unwinder can't grok). + Discard the additional .eh_frame generated + Discard the dwarf4 debug info generated by -gdwarf-2 for normal no debug case * 4.8 already uses arc600 multilibs for -mno-mpy * switch to using uclibc compiler (to get -mmedium-calls and -mno-sdata) and also since buildroot can only use 1 toolchain Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-06-22ARC: Use kconfig helper IS_ENABLED() to get rid of defines.hVineet Gupta1-3/+1
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-05-07ARC: [TB10x] Add support for TB10x platformChristian Ruppert1-0/+1
Infrastructure required to make the Linux kernel compile and boot on the Abilis Systems TB10x series of SOCs based on ARC700 CPUs: - Kmake related files (Kconfig, Makefile, tb10x_defconfig) - TB10x platform initialisation Signed-off-by: Christian Ruppert <christian.ruppert@abilis.com> Signed-off-by: Pierrick Hascoet <pierrick.hascoet@abilis.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-04-09ARC: [build] Allow uncompressed uImageVineet Gupta1-2/+3
The existing uImage target always generates gzip compressed image which drags bootup for some very slow FPGA customer boards. So introduce seperate make targets:uImage.{bin,gz} with uncompressed being default. Also tie gz generation to CONFIG_KERNEL_GZIP, which a platform can select in it's Kconfig if it wishes gz to be default. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-04-09ARC: [build] cleanup Makefile a bitVineet Gupta1-2/+3
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-04-09ARC: [build] silence make defconfig warnings with host gcc 4.7Vineet Gupta1-0/+4
We do cross compiles for ARC Linux. With gcc 4.7, a make defconfig spews out the following: ------------------->8-------------------------- make ARCH=arc defconfig gcc: error: unrecognized command line option '-marc600' gcc: error: unrecognized command line option '-mA7' gcc: error: unrecognized command line option '-mno-sdata' gcc: error: unrecognized command line option '-mno-mpy' *** Default configuration is based on 'fpga_defconfig' ------------------->8-------------------------- This apparently is coming from LIBGCC line - which is strange to be invoked for defconfig generation. Reported-by: Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-02-15ARC: [Review] Multi-platform image #4: Isolate platform headersVineet Gupta1-15/+1
-Top level ARC makefile removes -I for platform headers -asm/irq.h no longer includes plat/irq.h -platform makefile adds -I for it's specfic platform headers -platform code to directly include it's plat/irq.h -Linker script needed plat/memmap.h for CCM info, already in .config Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Arnd Bergmann <arnd@arndb.de> Acked-by: Arnd Bergmann <arnd@arndb.de>
2013-02-15ARC: Boot #2: Verbose Boot reporting / feature verificationVineet Gupta1-0/+2
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-02-15ARC: SMP supportVineet Gupta1-0/+3
ARC common code to enable a SMP system + ISS provided SMP extensions. ARC700 natively lacks SMP support, hence some of the core features are are only enabled if SoCs have the necessary h/w pixie-dust. This includes: -Inter Processor Interrupts (IPI) -Cache coherency -load-locked/store-conditional ... The low level exception handling would be completely broken in SMP because we don't have hardware assisted stack switching. Thus a fair bit of this code is repurposing the MMU_SCRATCH reg for event handler prologues to keep them re-entrant. Many thanks to Rajeshwar Ranga for his initial "major" contributions to SMP Port (back in 2008), and to Noam Camus and Gilad Ben-Yossef for help with resurrecting that in 3.2 kernel (2012). Note that this platform code is again singleton design pattern - so multiple SMP platforms won't build at the moment - this deficiency is addressed in subsequent patches within this series. Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Rajeshwar Ranga <rajeshwar.ranga@gmail.com> Cc: Noam Camus <noamc@ezchip.com> Cc: Gilad Ben-Yossef <gilad@benyossef.com>
2013-02-15ARC: OProfile supportVineet Gupta1-0/+2
Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Robert Richter <rric@kernel.org> Cc: oprofile-list@lists.sf.net Reviewed-by: James Hogan <james.hogan@imgtec.com>
2013-02-15ARC: [optim] Cache "current" in Register r25Vineet Gupta1-0/+9
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-02-15ARC: [DeviceTree] Basic supportVineet Gupta1-0/+9
This is minimal infrastructure needed for devicetree work. It uses an a sample "skeleton" devicetree - embedded in kernel image - to print the board, manufacturer by parsing the top-level "compatible" string. As of now we don't need any additional "board" specific "machine_desc". TODO: support interpreting the command line as boot-loader passed dtb Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: devicetree-discuss@lists.ozlabs.org Cc: Rob Herring <rob.herring@calxeda.com> Cc: James Hogan <james.hogan@imgtec.com> Reviewed-by: Rob Herring <rob.herring@calxeda.com> Reviewed-by: James Hogan <james.hogan@imgtec.com>
2013-02-11ARC: Build system: Makefiles, Kconfig, Linker scriptVineet Gupta1-0/+115
Arnd in his review pointed out that arch Kconfig organisation has several deficiencies: * Build time entries for things which can be runtime extracted from DT (e.g. SDRAM size, core clk frequency..) * Not multi-platform-image-build friendly (choice .. endchoice constructs) * cpu variants support (750/770) is exclusive. The first 2 have been fixed in subsequent patches. Due to the nature of the 750 and 770, it is not possible to build for both together, w/o special runtime glue code which would hurt performance. Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Sam Ravnborg <sam@ravnborg.org> Acked-by: Sam Ravnborg <sam@ravnborg.org>
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