summaryrefslogtreecommitdiffstats
path: root/arch
AgeCommit message (Collapse)Author
2015-02-18ARM: BCM: put back ARCH_MULTI_V7 dependency for mobileArnd Bergmann
A recent cleanup rearranged the Kconfig file for mach-bcm and accidentally dropped the dependency on ARCH_MULTI_V7, which makes it possible to now build the two mobile SoC platforms on an ARMv6-only kernel, resulting in a log of Kconfig warnings like warning: ARCH_BCM_MOBILE selects ARM_ERRATA_775420 which has unmet direct dependencies (CPU_V7) and which of course cannot work on any machine. This puts back the dependencies as before. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 64e74aa788f99 ("ARM: mach-bcm: ARCH_BCM_MOBILE: remove one level of menu from Kconfig") Acked-by: Florian Fainelli <f.fainelli@gmail.com> Acked-by: Scott Branden <sbranden@broadcom.com>
2015-02-18ARM: vexpress: use ARM_CPU_SUSPEND if neededArnd Bergmann
The vexpress tc2 power management code calls mcpm_loopback, which is only available if ARM_CPU_SUSPEND is enabled, otherwise we get a link error: arch/arm/mach-vexpress/built-in.o: In function `tc2_pm_init': arch/arm/mach-vexpress/tc2_pm.c:389: undefined reference to `mcpm_loopback' This explicitly selects ARM_CPU_SUSPEND like other platforms that need it. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 3592d7e002438 ("ARM: 8082/1: TC2: test the MCPM loopback during boot") Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Liviu Dudau <liviu.dudau@arm.com> Cc: Kevin Hilman <khilman@linaro.org> Cc: Sudeep Holla <sudeep.holla@arm.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2015-02-17Merge tag 'please-pull-fixmcelog' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras Pull mcelog regression fix from Tony Luck: "Fix regression - functions on the mce notifier chain should not be able to decide that an event should not be logged" * tag 'please-pull-fixmcelog' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras: x86/mce: Fix regression. All error records should report via /dev/mcelog
2015-02-17Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge yet more updates from Andrew Morton: - a pile of minor fs fixes and cleanups - kexec updates - random misc fixes in various places: vmcore, rbtree, eventfd, ipc, seccomp. - a series of python-based kgdb helper scripts * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (58 commits) seccomp: cap SECCOMP_RET_ERRNO data to MAX_ERRNO samples/seccomp: improve label helper ipc,sem: use current->state helpers scripts/gdb: disable pagination while printing from breakpoint handler scripts/gdb: define maintainer scripts/gdb: convert CpuList to generator function scripts/gdb: convert ModuleList to generator function scripts/gdb: use a generator instead of iterator for task list scripts/gdb: ignore byte-compiled python files scripts/gdb: port to python3 / gdb7.7 scripts/gdb: add basic documentation scripts/gdb: add lx-lsmod command scripts/gdb: add class to iterate over CPU masks scripts/gdb: add lx_current convenience function scripts/gdb: add internal helper and convenience function for per-cpu lookup scripts/gdb: add get_gdbserver_type helper scripts/gdb: add internal helper and convenience function to retrieve thread_info scripts/gdb: add is_target_arch helper scripts/gdb: add helper and convenience function to look up tasks scripts/gdb: add task iteration class ...
2015-02-17kexec: add IND_FLAGS macroGeoff Levand
Add a new kexec preprocessor macro IND_FLAGS, which is the bitwise OR of all the possible kexec IND_ kimage_entry indirection flags. Having this macro allows for simplified code in the prosessing of the kexec kimage_entry items. Also, remove the local powerpc definition and use the generic one. Signed-off-by: Geoff Levand <geoff@infradead.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Vivek Goyal <vgoyal@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Maximilian Attems <max@stro.at> Cc: Michal Marek <mmarek@suse.cz> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17Merge branch 'parisc-3.20-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc update from Helge Deller: "The major change in here is the removal of the old HP-UX compat code which should have made it possible to load and execute 32-bit HP-UX binaries on PA-RISC Linux. Since it was never functional and since nobody cares about old 32-bit HPUX binaries any longer, it's now time to free up 3200 lines of kernel code (CONFIG_HPUX and CONFIG_BINFMT_SOM). Other than that we wire up the execveat() syscall, fix sparse errors and have some whitespace cleanups" * 'parisc-3.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: fs/binfmt_som: Drop kernel support for HP-UX SOM binaries parisc: Remove unused function parisc: macro whitespace fixes parisc/uaccess: fix sparse errors parisc: hpux - Remove HPUX syscall numbers parisc: hpux - Remove hpux gateway page parisc: hpux - Delete files in hpux subdirectory parisc: hpux - Do not compile hpux subdirectory parisc: hpux - Drop support for HP-UX binaries parisc: Add error checks when building up signal trampoline handler parisc: Wire up execveat syscall
2015-02-17Merge tag 'nios2-v3.20-rc1' of git://git.rocketboards.org/linux-socfpga-nextLinus Torvalds
Pull arch/nios2 update from Ley Foon Tan: "Here is the nios2 update for 3.20: - add early printk support - add kgdb support - add compressed kernel support - bugfixes" * tag 'nios2-v3.20-rc1' of git://git.rocketboards.org/linux-socfpga-next: nios2: add kgdb support MAINTAINERS: update arch/nios2 git tree nios2: default CONFIG_NIOS2_BOOT_LINK_OFFSET to 8MB nios2: Add support for compressed kernel nios2: add early printk support nios2: Port OOM changes to do_page_fault() nios2: Remove unused prepare_to_copy()
2015-02-17Merge tag '64bit-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC 64-bit changes and additions from Olof Johansson: "The 64-bit set of updates this release cycle adds support for three new platforms: - Samsunc Exynos 7 - Freescale LS2085a - Mediatek MT8173 For all these, the changes mostly consititude additions of DT contents, but also some Kconfig entries to allow dependency/selection of drivers per-platform, etc" * tag '64bit-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: arm64: Kconfig: clean up two no-op Kconfig options from CONFIG_ARCH_TEGRA* arm64: Fix sort of platform Kconfig entries arm64: Add support for FSL's LS2085A SoC in Kconfig and defconfig arm64: Add DTS support for FSL's LS2085A SoC arm64: mediatek: Add MT8173 SoC Kconfig and defconfig arm64: dts: Add mediatek MT8173 SoC and evaluation board dts and Makefile Document: DT: Add bindings for mediatek MT8173 SoC Platform arm64: Add Tegra132 support arm64: Enable ARMv8 based exynos7 SoC support arm64: dts: Add nodes for mmc, i2c, rtc, watchdog, adc on exynos7 arm64: dts: Add PMU DT node for exynos7 SoC arm64: dts: Add initial pinctrl support to exynos7 arm64: dts: Add initial device tree support for exynos7
2015-02-17Merge tag 'defconfig-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC defconfig changes from Olof Johansson: "Most of these changes are to enable new drivers that have been merged, or various additions to make defconfigs more useful. There's also a set of patches trimming down omap2plus kernel size a bit since it is quite large" * tag 'defconfig-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (39 commits) ARM: config: add DEVTMPFS option by default to keystone config ARM: multi_v7_defconfig: Enable Exynos5420 Multi-Cluster PM support ARM: shmobile: Select CONFIG_REGULATOR in defconfig once again ARM: exynos_defconfig: Enable CONFIG_FHANDLE ARM: exynos_defconfig: Enable PMIC and MUIC drivers for Gears and Trats2 ARM: exynos_defconfig: Enable CONFIG_LOCKUP_DETECTOR ARM: config: enable ARCH_HIP01 ARM: omap2plus_defconfig: Enable OHCI & EHCI HCD support ARM: omap2plus_defconfig: Enable misc options for BeagleBoard-X15 platform ARM: imx_v6_v7_defconfig: enable more USB functions ARM: imx_v6_v7_defconfig: Select CONFIG_FB_MXS ARM: omap2plus_defconfig: Enable pcf857x ARM: omap2plus_defconfig: Add NOR flash support ARM: omap2plus_defconfig: Enable support for davinci_emac ARM: multi_v7_defconfig: Enable MiPHY28lp - ST's Generic (SATA, PCIe & USB3) PHY ARM: efm32: update defconfig ARM: at91: sama5: enable atmel-isi and ov2640 in defconfig ARM: multi_v7_defconfig: Enable Hip01 platform ARM: config: multi_v7: Update it for Keystone defconfig ARM: shmobile: Enable kzm9g board in multiplatform defconfig ...
2015-02-17Merge tag 'drivers-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC driver updates from Olof Johansson: "These are changes for drivers that are intimately tied to some SoC and for some reason could not get merged through the respective subsystem maintainer tree. This time around, much of this is for at91, with the bulk of it being syscon and udc drivers. Also, there's: - coupled cpuidle support for Samsung Exynos4210 - Renesas 73A0 common-clk work - of/platform changes to tear down DMA mappings on device destruction - a few updates to the TI Keystone knav code" * tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (26 commits) cpuidle: exynos: add coupled cpuidle support for exynos4210 ARM: EXYNOS: apply S5P_CENTRAL_SEQ_OPTION fix only when necessary soc: ti: knav_qmss_queue: change knav_range_setup_acc_irq to static soc: ti: knav_qmss_queue: makefile tweak to build as dynamic module pcmcia: at91_cf: depend on !ARCH_MULTIPLATFORM soc: ti: knav_qmss_queue: export API calls for use by user driver of/platform: teardown DMA mappings on device destruction usb: gadget: at91_udc: Allocate udc instance usb: gadget: at91_udc: Update DT binding documentation usb: gadget: at91_udc: Rework for multi-platform kernel support usb: gadget: at91_udc: Simplify probe and remove functions usb: gadget: at91_udc: Remove non-DT handling code usb: gadget: at91_udc: Document DT clocks and clock-names property usb: gadget: at91_udc: Drop uclk clock usb: gadget: at91_udc: Fix clock names mfd: syscon: Add Atmel SMC binding doc mfd: syscon: Add atmel-smc registers definition mfd: syscon: Add Atmel Matrix bus DT binding documentation mfd: syscon: Add atmel-matrix registers definition clk: shmobile: fix sparse NULL pointer warning ...
2015-02-17Merge tag 'dt-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC DT updates from Olof Johansson: "DT changes continue to be the bulk of our merge window contents. We continue to have a large set of changes across the board as new platforms and drivers are added. Some of the new platforms are: - Alphascale ASM9260 - Marvell Armada 388 - CSR Atlas7 - TI Davinci DM816x - Hisilicon HiP01 - ST STiH418 There have also been some sweeping changes, including relicensing of DTS contents from GPL to GPLv2+/X11 so that the same files can be reused in other non-GPL projects more easily. There's also been changes to the DT Makefile to make it a little less conflict-ridden and churny down the road" * tag 'dt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (330 commits) ARM: dts: Add PPMU node for exynos4412-trats2 ARM: dts: Add PPMU node for exynos3250-monk and exynos3250-rinato ARM: dts: Add PPMU dt node for exynos4 and exynos4210 ARM: dts: Add PPMU dt node for exynos3250 ARM: dts: add mipi dsi device node for exynos4415 ARM: dts: add fimd device node for exynos4415 ARM: dts: Add syscon phandle to the video-phy node for Exynos4 ARM: dts: Add sound nodes for exynos4412-trats2 ARM: dts: Fix CLK_MOUT_CAMn parent clocks assignment for exynos4412-trats2 ARM: dts: Fix CLK_UART_ISP_SCLK clock assignment in exynos4x12.dtsi ARM: dts: Add max77693 charger node for exynos4412-trats2 ARM: dts: Switch max77686 regulators to GPIO control for exynos4412-trats2 ARM: dts: Add suspend configuration for max77686 regulators for exynos4412-trats2 ARM: dts: Add Maxim 77693 fuel gauge node for exynos4412-trats2 ARM: dts: am57xx-beagle-x15: Fix USB2 mode ARM: dts: am57xx-beagle-x15: Add extcon nodes for USB ARM: dts: dra72-evm: Add extcon nodes for USB ARM: dts: dra7-evm: Add extcon nodes for USB ARM: dts: rockchip: move the hdmi ddc-i2c-bus property to the actual boards ARM: dts: rockchip: enable vops and hdmi output on rk3288-firefly and -evb ...
2015-02-17Merge tag 'soc-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC platform changes from Olof Johansson: "New and updated SoC support. Also included are some cleanups where the platform maintainers hadn't separated cleanups from new developent in separate branches. Some of the larger things worth pointing out: - A large set of changes from Alexandre Belloni and Nicolas Ferre preparing at91 platforms for multiplatform and cleaning up quite a bit in the process. - Removal of CSR's "Marco" SoC platform that never made it out to the market. We love seeing these since it means the vendor published support before product was out, which is exactly what we want! New platforms this release are: - Conexant Digicolor (CX92755 SoC) - Hisilicon HiP01 SoC - CSR/sirf Atlas7 SoC - ST STiH418 SoC - Common code changes for Nvidia Tegra132 (64-bit SoC) We're seeing more and more platforms having a harder time labelling changes as cleanups vs new development -- which is a good sign that we've come quite far on the cleanup effort. So over time we might start combining the cleanup and new-development branches more" * tag 'soc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (124 commits) ARM: at91/trivial: unify functions and machine names ARM: at91: remove at91_dt_initialize and machine init_early() ARM: at91: change board files into SoC files ARM: at91: remove at91_boot_soc ARM: at91: move alternative initial mapping to board-dt-sama5.c ARM: at91: merge all SOC_AT91SAM9xxx ARM: at91: at91rm9200: set idle and restart from rm9200_dt_device_init() ARM: digicolor: select syscon and timer ARM: zynq: Simplify SLCR initialization ARM: zynq: PM: Fixed simple typo. ARM: zynq: Setup default gpio number for Xilinx Zynq ARM: digicolor: add low level debug support ARM: initial support for Conexant Digicolor CX92755 SoC ARM: OMAP2+: Add dm816x hwmod support ARM: OMAP2+: Add clock domain support for dm816x ARM: OMAP2+: Add board-generic.c entry for ti81xx ARM: at91: pm: remove warning to remove SOC_AT91SAM9263 usage ARM: at91: remove unused mach/system_rev.h ARM: at91: stop using HAVE_AT91_DBGUx ARM: at91: fix ordering of SRAM and PM initialization ...
2015-02-17Merge tag 'cleanup-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC cleanups from Olof Johansson: "This is a good healthy set of various code removals. Total net delta is 8100 lines removed. Among the larger cleanups are: - Removal of old Samsung S3C DMA infrastructure by Arnd - Removal of the non-DT version of the 'lager' board by Magnus Damm - General stale code removal on OMAP and Davinci by Rickard Strandqvist - Removal of non-DT support on am3517 platforms by Tony Lindgren ... plus several other cleanups of various platforms across the board" * tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (47 commits) ARM: sirf: drop redundant function and marco declaration arm: omap: specify PMUs are for ARMv7 CPUs arm: shmobile: specify PMUs are for ARMv7 CPUs arm: iop: specify PMUs are for XScale CPUs arm: pxa: specify PMUs are for XScale CPUs arm: realview: specify PMU types ARM: SAMSUNG: remove unused DMA infrastructure ARM: OMAP3: Add back Kconfig option MACH_OMAP3517EVM for ASoC ARM: davinci: Remove CDCE949 driver ARM: at91: remove useless at91rm9200_set_type() ARM: at91: remove useless at91rm9200_dt_initialize() ARM: at91: move debug-macro.S into the common space ARM: at91: remove useless at91_sysirq_mask_rtx ARM: at91: remove useless config MACH_AT91SAM9_DT ARM: at91: remove useless config MACH_AT91RM9200_DT ARM: at91: remove unused mach/memory.h ARM: at91: remove useless header file includes ARM: at91: remove unneeded header file rtc: at91/Kconfig: remove useless options ARM: at91/Documentation: add a README for Atmel SoCs ...
2015-02-17Merge tag 'fixes-non-critical-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC non-critical fixes from Olof Johansson: "Here's a small collection of fixes accrued during the last release that weren't considered severe enough to merge during the -rc series. A few of these are around resurrecting TI81xx support that's been broken for quite a while, the rest are smaller fixes -- most for PXA but a few across the board. There are also some updates to MAINTAINERS here, in particular for Broadcom platforms" * tag 'fixes-non-critical-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (23 commits) MAINTAINERS: fix git repositories for Broadcom SoCs ARM: pxa: fix broken isa interrupts for zeus and viper ARM: DRA7: hwmod: Fix boot crash with DEBUG_LL enabled on UART3 ARM: OMAP: DRA7: hwmod: Make gpmc software supervised as the smart idle is broken ARM: AM43xx: hwmod: set DSS submodule parent hwmods ARM: OMAP2+: hwmod: print error if wait_target_ready() failed MAINTAINERS: add maintainer for OMAP hwmod data ARM: OMAP2+: Disable omap3 PM init for ti81xx ARM: OMAP2+: Fix reboot for 81xx ARM: OMAP2+: Fix dm814 and dm816 for clocks and timer init ARM: OMAP2+: Fix ti81xx class type ARM: OMAP2+: Fix ti81xx devtype ARM: OMAP2+: Fix error handling for omap2_clk_enable_init_clocks MAINTAINERS: add a git entry for BMIPS-based BCM7xxx SoCs MAINTAINERS: add a git entry for BCM7xxx ARM-based SoCs MAINTAINERS: update Broadcom Cygnus SoC git tree MAINTAINERS: move BCM63xx ARM-based SoCs git tree hx4700: regulator: declare full constraints ARM: pxa: add regulator_has_full_constraints to spitz board file ARM: pxa: add regulator_has_full_constraints to poodle board file ...
2015-02-17Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge fifth set of updates from Andrew Morton: - A few things which were awaiting merges from linux-next: - rtc - ocfs2 - misc others - Willy's "dax" feature: direct fs access to memory (mainly NV-DIMMs) which isn't backed by pageframes. * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (37 commits) rtc: add driver for DS1685 family of real time clocks MAINTAINERS: add entry for Maxim PMICs on Samsung boards lib/Kconfig: use bool instead of boolean powerpc: drop _PAGE_FILE and pte_file()-related helpers ocfs2: set append dio as a ro compat feature ocfs2: wait for orphan recovery first once append O_DIRECT write crash ocfs2: complete the rest request through buffer io ocfs2: do not fallback to buffer I/O write if appending ocfs2: allocate blocks in ocfs2_direct_IO_get_blocks ocfs2: implement ocfs2_direct_IO_write ocfs2: add orphan recovery types in ocfs2_recover_orphans ocfs2: add functions to add and remove inode in orphan dir ocfs2: prepare some interfaces used in append direct io MAINTAINERS: fix spelling mistake & remove trailing WS dax: does not work correctly with virtual aliasing caches brd: rename XIP to DAX ext4: add DAX functionality dax: add dax_zero_page_range ext2: get rid of most mentions of XIP in ext2 ext2: remove ext2_aops_xip ...
2015-02-17MIPS: Add Malta QEMU 32R6 defconfigMarkos Chandras
Add a Malta defconfig for the 32-bit MIPS R6 core as emulated by QEMU. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: Malta: Add support for building MIPS R6 kernelMarkos Chandras
The Malta platform supports MIPS R6 (via QEMU or real bitstreams) so add support for it. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: kernel: elf: Improve the overall ABI and FPU mode checksMarkos Chandras
The previous implementation did not cover all possible FPU combinations and it silently allowed ABI incompatible objects to be loaded with the wrong ABI. For example, the previous logic would set the FP_64 ABI as the matching ABI for an FP_XX object combined with an FP_64A object. This was wrong, and the matching ABI should have been FP_64A. The previous logic is now replaced with a new one which determines the appropriate FPU mode to be used rather than the FP ABI. This has the advantage that the entire logic is much simpler since it is the FPU mode we are interested in rather than the FP ABI resulting to code simplifications. This also removes the now obsolete FP32XX_HYBRID_FPRS option. Cc: Matthew Fortune <Matthew.Fortune@imgtec.com> Cc: Paul Burton <paul.burton@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: asm: fpu: Allow 64-bit FPU on MIPS32 R6Markos Chandras
MIPS32 R6 has a 64-bit FPU so add the necessary MIPS R6 definition. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: kernel: process: Do not allow FR=0 on MIPS R6Markos Chandras
A prctl() call to set FR=0 for MIPS R6 should not be allowed since FR=1 is the only option for R6 cores. Cc: Paul Burton <paul.burton@imgtec.com> Cc: Matthew Fortune <matthew.fortune@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: Handle MIPS IV, V and R2 FPU instructions on MIPS R6 as wellMarkos Chandras
MIPS R2 FPU instructions are also present in MIPS R6 so amend the preprocessor definitions to take MIPS R6 into consideration. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: Make use of the ERETNC instruction on MIPS R6Markos Chandras
The ERETNC instruction, introduced in MIPS R5, is similar to the ERET one, except it does not clear the LLB bit in the LLADDR register. This feature is necessary to safely emulate R2 LL/SC instructions. However, on context switches, we need to clear the LLAddr/LLB bit in order to make sure that an SC instruction from the new thread will never succeed if it happens to interrupt an LL operation on the same address from the previous thread. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: kernel: mips-r2-to-r6-emul: Add R2 emulator for MIPS R6Leonid Yegoshin
MIPS R6 removed quite a few R2 instructions. However, there is plenty of <R6 userland code so we add an in-kernel emulator so we can still be able to execute all R2 userland out there. The emulator comes with a handy debugfs under /mips/ directory (r2-emul-stats) to provide some basic statistics of the instructions that are being emulated. Below are some statistics from booting a minimal buildroot image: Instruction Total BDslot ------------------------------ movs 236969 0 hilo 56686 0 muls 55279 0 divs 10941 0 dsps 0 0 bops 1 0 traps 0 0 fpus 0 0 loads 214981 17 stores 103364 0 llsc 56898 0 dsemul 150418 0 jr 370158 bltzl 43 bgezl 1594 bltzll 0 bgezll 0 bltzal 39 bgezal 39 beql 14503 bnel 138741 blezl 0 bgtzl 3988 Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: asm: mipsregs: Add support for the LLADDR registerMarkos Chandras
If Config5/LLB is set in the core, then software can write the LLB bit in the LLADDR register. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: Add LLB bit and related feature for the Config 5 CP0 registerMarkos Chandras
The LLBIT (bit 4) in the Config5 CP0 register indicates the software availability of the Load-Linked bit. This bit is only set by hardware and it has the following meaning: 0: LLB functionality is not supported 1: LLB functionality is supported. The following feature are also supported: - ERETNC instruction. Similar to ERET but it does not clear the LLB bit in the LLAddr register. - CP0 LLAddr/LLB bit must be set - LLbit is software accessible through the LLAddr[0] This will be used later on to emulate R2 LL/SC instructions. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: Emulate the new MIPS R6 BNEZC and JIALC instructionsMarkos Chandras
MIPS R6 uses the <R6 sdc2 opcode for the new BNEZC and JIALC instructions Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: Emulate the new MIPS R6 BEQZC and JIC instructionsMarkos Chandras
MIPS R6 uses the <R6 ldc2 opcode for the new BEQZC and JIC instructions Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: Emulate the new MIPS R6 BALC instructionMarkos Chandras
MIPS R6 uses the <R6 swc2 opcode for the new BALC instructions. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: Emulate the new MIPS R6 BNVC, BNEC and BNEZLAC instructionsMarkos Chandras
MIPS R6 uses the <R6 DADDI opcode for the new BNVC, BNEC and BNEZLAC instructions. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: Emulate the new MIPS R6 BOVC, BEQC and BEQZALC instructionsMarkos Chandras
MIPS R6 uses the <R6 ADDI opcode for the new BOVC, BEQC and BEQZALC instructions. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: Emulate the new MIPS R6 branch compact (BC) instructionMarkos Chandras
MIPS R6 uses the <R6 LWC2 opcode for the new BC instruction. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: Emulate the new MIPS R6 B{L,G}T{Z,}{AL,}C instructionsMarkos Chandras
MIPS R6 added the following four instructions which share the BGTZ and BGTZL opcode: BLTZALC: Compact branch-and-link if GPR rt is < to zero BGTZALC: Compact branch-and-link if GPR rt is > to zero BLTZL : Compact branch if GPR rt is < to zero BGTZL : Compact branch if GPR rt is > to zero BLTC : Compact branch if GPR rs is less than GPR rt BLTUC : Similar to BLTC but unsigned Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: Emulate the new MIPS R6 B{L,G}Ε{Z,}{AL,}C instructionsMarkos Chandras
MIPS R6 added the following four instructions which share the BLEZ and BLEZL opcodes: BLEZALC: Compact branch-and-link if GPR rt is <= to zero BGEZALC: Compact branch-and-link if GPR rt is >= to zero BLEZC : Compact branch if GPR rt is <= to zero BGEZC : Compact branch if GPR rt is >= to zero BGEC : Compact branch if GPR rs is less than or equal to GPR rt BGEUC : Similar to BGEC but unsigned. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: Emulate the BC1{EQ,NE}Z FPU instructionsMarkos Chandras
MIPS R6 introduced the following two branch instructions for COP1: BC1EQZ: Branch if Cop1 (FPR) Register Bit 0 is Equal to Zero BC1NEZ: Branch if Cop1 (FPR) Register Bit 0 is Not Equal to Zero Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: kernel: branch: Do not emulate the branch likelies on MIPS R6Markos Chandras
MIPS R6 removed the BLTZL, BGEZL, BLTZAL, BGEZAL, BEQL, BNEL, BLEZL, BGTZL branch likely instructions so we must not try to emulate them on MIPS R6 if the R2-to-R6 emulator is not present. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: kernel: Prepare the JR instruction for emulation on MIPS R6Markos Chandras
The MIPS R6 JR instruction is an alias to the JALR one, so it may need emulation for non-R6 userlands. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: mm: scache: Add secondary cache support for MIPS R6 coresMarkos Chandras
The secondary cache initialization and configuration code is processor specific so we need to handle MIPS R6 cores as well. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: mm: c-r4k: Set the correct ISA levelMarkos Chandras
The local_r4k_flush_cache_sigtramp function uses the 'cache' instruction inside an asm block. However, MIPS R6 changed the opcode for the cache instruction and as a result of which we need to set the correct ISA level. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: mm: tlbex: Use cpu_has_mips_r2_exec_hazard for the EHB instructionLeonid Yegoshin
MIPS uses the cpu_has_mips_r2_exec_hazard macro to determine whether the EHB instruction is available or not. This is necessary for MIPS R6 which also supports the EHB instruction. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: mm: page: Add MIPS R6 supportMarkos Chandras
The MIPS R6 pref instruction only has 9 bits for the immediate field so skip the micro-assembler PREF instruction if the offset does not fit in 9 bits. Moreover, bit 30 (Pref_PrepareForStore) is no longer valid in MIPS R6, so we change the default for all MIPS R6 processors to bit 5 (Pref_StoreStreamed). Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: lib: memset: Add MIPS R6 supportLeonid Yegoshin
MIPS R6 dropped the unaligned load and store instructions so we need to re-write this part of the code for R6 to store one byte at a time. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: lib: memcpy: Add MIPS R6 supportLeonid Yegoshin
MIPS R6 does not support the unaligned load and store instructions so we add a special MIPS R6 case to copy one byte at a time if we need to read/write to unaligned memory addresses. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: kernel: syscall: Set the appropriate ISA level for MIPS R6Markos Chandras
MIPS R6 changed the opcodes for LL/SC instructions so we need to set the appropriate ISA level. Cc: Matthew Fortune <Matthew.Fortune@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: kernel: unaligned: Add support for the MIPS R6Leonid Yegoshin
The load/store unaligned instructions have been removed in MIPS R6 so we need to re-implement the related macros using the regular load/store instructions. Moreover, the load/store from coprocessor 2 instructions have been reallocated in Release 6 so we will handle them in the emulator instead. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: kernel: cps-vec: Replace "addi" with "addiu"Markos Chandras
The "addi" instruction will trap on overflows which is not something we need in this code, so we replace that with "addiu". Link: http://www.linux-mips.org/archives/linux-mips/2015-01/msg00430.html Cc: Maciej W. Rozycki <macro@linux-mips.org> Cc: <stable@vger.kernel.org> # v3.15+ Cc: Paul Burton <paul.burton@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: kernel: genex: Set correct ISA levelMarkos Chandras
The jr instruction opcode has changed in R6 so make sure the correct ISA level is set prior using that instruction. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: kernel: r4k_fpu: Add support for MIPS R6Leonid Yegoshin
Add the MIPS R6 related preprocessor definitions for FPU signal related functions. MIPS R6 only has FR=1 so avoid checking that bit on the C0/Status register. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: kernel: r4k_switch: Add support for MIPS R6Leonid Yegoshin
Add the MIPS R6 related preprocessor definitions for save/restore FPU related functions. We also set the appropriate ISA level so the final return instruction "jr ra" will produce the correct opcode on R6. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: kernel: traps: Add MIPS R6 related definitionsLeonid Yegoshin
Add MIPS R6 support to cache and ftlb exceptions, as well as to the hwrena and ebase register configuration. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2015-02-17MIPS: kernel: proc: Add MIPS R6 support to /proc/cpuinfoMarkos Chandras
Print 'mips64r6' and/or 'mips32r6' if the kernel is running on a MIPS R6 core. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>