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2016-10-06MIPS: PCI: Introduce CONFIG_PCI_DRIVERS_LEGACYPaul Burton4-25/+43
Introduce 2 Kconfig symbols, CONFIG_PCI_DRIVERS_GENERIC & CONFIG_PCI_DRIVERS_LEGACY, which indicate whether the system should be built to for PCI drivers using the MIPS-specific struct pci_controller API (hereafter "legacy" drivers) or more generic drivers using only functionality provided by the PCI core (hereafter "generic" drivers). The Kconfig entries are created such that platforms have to select CONFIG_PCI_DRIVERS_GENERIC if they wish to use it - that is, the default is CONFIG_PCI_DRIVERS_LEGACY so that existing platforms need no modification. The functions declared in pci.h are rearranged with those provided only by pci-legacy.c being guarded by an #ifdef CONFIG_PCI_DRIVERS_LEGACY to ensure they are only used in configurations where they are implemented. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14345/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: PCI: Split pci.c into pci.c & pci-legacy.cPaul Burton3-284/+306
Split out the parts of pci.c that are used by existing systems with MIPS-style PCI drivers but that will not be used by systems with more generic PCI drivers such as pcie-xilinx. This is done in preparation for allowing configurations where the code moved to pci-legacy.c is not built. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: Paul Burton <paul.burton@imgtec.com> Patchwork: https://patchwork.linux-mips.org/patch/14344/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: PCI: Inline pcibios_assign_all_bussesPaul Burton2-7/+4
The MIPS implementation of pcibios_assign_all_busses trivially returns 1. Implement it as a static function in asm/pci.h such that the compiler can inline it & optimise out never-taken paths. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14343/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: PCI: Make pcibios_set_cache_line_size an initcallPaul Burton1-3/+3
In preparation for allowing configurations in which pcibios_init is not included, make pcibios_set_cache_line_size an initcall. arch_initcall is used such that it runs before the pcibios_init subsys_initcall for platforms that continue to use it. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14342/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: PCI: Support for CONFIG_PCI_DOMAINS_GENERICPaul Burton3-3/+25
Introduce support for CONFIG_PCI_DOMAINS_GENERIC, allowing for platforms to make use of generic PCI domains instead of the MIPS-specific implementation. The set_pci_need_domain_info function is introduced to abstract away the removed need_domain_info field in struct pci_controller, and pcibios_scanbus is adjusted to use the pci_domain_nr accessor instead of directly accessing the index field. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14341/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: PCI: Use struct list_head listsPaul Burton2-6/+6
Rather than open-coding a linked list implementation, make use of the one in linux/list.h. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14340/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: tracing: disable uprobe/kprobe on compact branch instructionsMarcin Nowakowski4-0/+48
Current instruction decoder for uprobe/kprobe handler only handles branches with delay slots. For compact branches the behaviour is rather unpredictable - and depending on the encoding of a compact branch instruction may result in one (or more) of: - executing an instruction that follows a branch which wasn't in a delay slot and shouldn't have been executed - incorrectly emulating a branch leading to a jump to a wrong location - unexpected branching out of the single-stepped code and never reaching the breakpoint that should terminate the probe handler Results of these actions are generally unpredictable, but can end up with a probed application or kernel crash, so disable placing probes on compact branches until they are handled properly. Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14336/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: tracing: move insn_has_delay_slot to a shared headerMarcin Nowakowski3-120/+87
Currently both kprobes and uprobes code have definitions of the insn_has_delay_slot method. Move it to a separate header as an inline method that each probe-specific method can later use. No functional change intended, although the methods slightly varied in the constraints they set for the methods - the uprobes one was chosen as it is slightly more specific when filtering opcode fields. Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14335/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: BMIPS: Support APPENDED_DTBJaedon Shin1-0/+8
Use appended DTB when available. Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14337/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: BMIPS: Use interrupt-controller node nameJaedon Shin8-38/+38
Changes node names of the interrupt-controller device nodes to interrupt-controller instead of label strings. Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Jonas Gorski <jonas.gorski@gmail.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: MIPS Mailing List <linux-mips@linux-mips.org> Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14004/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: BMIPS: Add support NAND device nodesJaedon Shin13-0/+195
Adds NAND device nodes to BCM7xxx MIPS based SoCs. Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Jonas Gorski <jonas.gorski@gmail.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: MIPS Mailing List <linux-mips@linux-mips.org> Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14003/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: BMIPS: Add support SDHCI device nodesJaedon Shin10-0/+92
Adds SDHCI device nodes to BCM7xxx MIPS based SoCs. Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Cc: Jonas Gorski <jonas.gorski@gmail.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: MIPS Mailing List <linux-mips@linux-mips.org> Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14002/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: BMIPS: Add support GPIO device nodesJaedon Shin8-0/+246
Adds GPIO device nodes to BCM7xxx MIPS based SoCs. Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Jonas Gorski <jonas.gorski@gmail.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: MIPS Mailing List <linux-mips@linux-mips.org> Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14001/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: BMIPS: Add support PWM device nodesJaedon Shin16-0/+204
Adds PWM device nodes to BCM7xxx MIPS based SoCs. Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Cc: Jonas Gorski <jonas.gorski@gmail.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: MIPS Mailing List <linux-mips@linux-mips.org> Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14000/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: Malta: Remove custom halt implementationPaul Burton1-6/+0
The arch code will hang the machine with an infinite loop if the board doesn't provide an impelementation of halt - let it, rather than duplicating it. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14280/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: Malta: Use syscon-reboot driver to rebootPaul Burton11-13/+32
Make use of the generic syscon-reboot driver to reboot the Malta board, reducing the amount of platform code it requires. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Stephan Linz <linz@li-pro.net> Cc: Jacek Anaszewski <j.anaszewski@samsung.com> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14279/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: Malta: Probe pflash via DTPaul Burton6-48/+35
Add the DT nodes required to probe the CFI compatible parallel monitor flash found on the Malta development board, and remove the platform code that was previously doing it. Delete the now-empty malta-platform.c file. Adjust the Malta defconfigs that enable MTD & the pflash/CFI driver to enable CONFIG_MTD_PHYSMAP_OF rather than CONFIG_MTD_PHYSMAP in order to preserve their behaviour. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14278/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: Malta: Probe RTC via DTPaul Burton2-21/+15
Add the DT node required to probe the RTC, and remove the platform code that was previously doing it. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14277/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: Malta: Remove custom DT match tablePaul Burton1-15/+0
Since commit 44a7185c2ae6 ("of/platform: Add common method to populate default bus") the Malta publish_devices initcall has essentially been a no-op. Remove it. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14276/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: Malta: Probe interrupt controllers via DTPaul Burton4-91/+124
Probe the CPU, GIC & i8259 interrupt controllers present in the Malta system using device tree. This enables interrupts to be provided to devices using device tree as they are moved over to being probed using it. Since Malta is very configurable it's unknown whether a GIC will be present at compile time. In order to support both cases the malta_dt_shim code is added in order to detect whether a GIC is present, adjusting the DT to route interrupts correctly and nop out the GIC node if no GIC is found. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Kees Cook <keescook@chromium.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14274/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: Malta: Use all available DDR by defaultPaul Burton1-6/+104
Malta boards can have more than 256MB DDR available, but we have previously only made use of up to 256MB (ie. the DDR accessible via kseg0) by default, without the user manually specifying mem= kernel parameters. This patch causes all available DDR, as reported by the bootloader via the ememsize or memsize environment variables or optionally on the command line, to be used when possible without the user needing to manually provide the memory ranges. Malta now has 2 subtly different memory maps which have to be taken into account when setting this up. The original memory map (referred to by the code as v1) has up to 2GB of DDR aliased in both the upper & lower halves of the 32 bit physical address space, with a 256MB I/O region obscuring 0x10000000-0x1fffffff only in the lower alias. The revised v2 memory map is flat with up to 4GB DDR starting from 0x0, and the I/O region obscures 256MB of DDR which becomes inacessible. The memory map in use is indicated by a register provided by the rocit2 system controller, which is checked in order to set up the kernels memory ranges accordingly. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Kees Cook <keescook@chromium.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14273/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: Malta: Allow PCI devices DMA to lower 2GB physicalPaul Burton1-10/+7
Set the PCI_BAR0 register in all configurations such that PCI devices can perform DMA to all of the bottom 2GB of the physical address space. This is imperfect if we make use of the legacy Malta memory map, but it is an improvement on the inconsistent values setup before. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Alexander Sverdlin <alexander.sverdlin@nokia.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14272/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06irqchip: i8259: Remove unused i8259A_irq_pendingPaul Burton1-1/+0
The i8259A_irq_pending function is unused. Remove the dead code. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14271/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06irqchip: i8259: Allow platforms to override poll functionPaul Burton1-0/+11
The default i8259 polling function (i8259_irq) is nicely generic but is fairly costly. Platforms often provide an alternative means of polling for an i8259 interrupt, and when using the i8259 without device tree have typically just chained its parent interrupt to their own handler function. In order to allow for platform-specific polling functions to be used in cases where the driver is probed via device tree, provide an i8259_set_poll function that accepts a pointer to an alternative poll function that will override the default. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14270/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: SEAD3: Remove custom read_persistent_clockPaul Burton1-6/+0
The SEAD3 board defines a custom implementation of read_persistent_clock which does exactly the same dummy operation as the generic weak version. Remove the not really implemented custom version. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14064/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: SEAD3: Use img-ascii-lcd driverPaul Burton4-81/+6
Probe the img-ascii-lcd driver using device tree in order to display a message on the SEAD3 board's LCD display, and remove the platform code that was formerly performing this function. This removes more platform code and moves SEAD3 further towards being entirely DT-based. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Jacek Anaszewski <j.anaszewski@samsung.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14063/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06MIPS: SEAD3: Drop use of cobalt fbdev driverPaul Burton2-45/+1
The 2 line * 16 character LCD display on the SEAD3 board has no real use as a framebuffer device. It's far too small to produce any meaningful output if used as the kernel console, SEAD3 is a development board that will essentially always have a far more useful UART connection & the code in sead3-display.c will overwrite whatever's on the display every second anyway. Remove this unused code. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Jacek Anaszewski <j.anaszewski@samsung.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14059/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: SEAD3: Parse memsize in DT shimPaul Burton2-66/+71
Parse the memsize argument provided by the bootloader in the DT shim code, allowing the user to override it on the command line. This places all of the DT manipulation code into sead3-dtshim.c. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Rob Herring <robh@kernel.org> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14058/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: SEAD3: Use generic restart-poweroff driverPaul Burton4-32/+5
Remove the custom platform code to restart when instructed to power off, instead relying upon the generic restart-poweroff driver probed via DT to do the same thing. Remove also the halt implementation, which is incorrect. The generic MIPS version will hang the system as halt should. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Jacek Anaszewski <j.anaszewski@samsung.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14057/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: SEAD3: Reset via generic syscon-reboot driver & DTPaul Burton3-10/+14
Remove the SEAD3 implementation of _machine_restart & instead make use of the generic syscon-reboot driver probed via device tree. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14056/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: SEAD3: Use register-bit-led driver via DT for LEDsPaul Burton4-92/+105
Probe a driver for the PLED & FLED LEDs found on the SEAD3 board using the register-bit-led driver via device tree, rather than a custom driver via platform code. Enable support for the register-bit-led driver & its prerequisite syscon in sead3_defconfig. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Jacek Anaszewski <j.anaszewski@samsung.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14054/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: SEAD3: Probe parallel flash via DTPaul Burton2-37/+24
Probe the system parallel flash using device tree rather than platform code, in order to reduce the amount of the latter. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14053/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: SEAD3: Probe EHCI controller using DTPaul Burton4-81/+23
Probe the SEAD3 EHCI controller using the generic-ehci driver & device tree rather than platform code, in order to reduce the amount of the latter. Now that no devices probed from platform code require interrupts, remove the retrieval of the IRQ domain & sead3int.h. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14051/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: SEAD3: Probe ethernet controller using DTPaul Burton4-36/+26
Probe the smsc911x ethernet controller using device tree rather than platform code, reducing the amount of the latter. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14050/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: SEAD3: Use generic ns16550a earlycon supportPaul Burton5-55/+2
Stop selecting SYS_HAS_EARLY_PRINTK & remove the custom support for early output to the ns16550a UARTs, instead relying upon generic ns16550a earlycon support. This reduces the amount of platform code required for SEAD3 without losing any functionality. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Jacek Anaszewski <j.anaszewski@samsung.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14049/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: SEAD3: Probe UARTs using DTPaul Burton6-81/+143
Probe the UARTs on SEAD3 boards using device tree rather than platform code, in order to reduce the amount of the latter. This requires that CONFIG_SERIAL_OF_PLATFORM be enabled, so enable it in sead3_defconfig. The SEAD3 DT shim code is extended to read bootloader environment variables to determine the appropriate UART & mode for kernel console output & set the stdout-path property of the chosen node accordingly. In contrast to the old platform code, which appears to have only ever set "console=ttyS0,38400n8r" with the code in console_config never having an effect, this will honor the "yamontty" environment variable to select between the 2 UARTs on the board and then check the "modetty0" or "modetty1" variable as appropriate to determine the UART configuration. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14048/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: SEAD3: Probe interrupt controllers using DTPaul Burton8-44/+197
Probe the CPU interrupt controller & optional Global Interrupt Controller (GIC) using devicetree rather than platform code. Because the bootloader on SEAD3 does not provide a device tree to the kernel & the device tree is always built in, we patch out the GIC node during boot if we detect that a GIC is not present in the system. The appropriate IRQ domain is discovered by platform code setting up device IRQ numbers temporarily. It will be removed by further patches which move the devices towards being probed via device tree. No behavioural change is intended by this patch. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Jacek Anaszewski <j.anaszewski@samsung.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14047/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: SEAD3: Split obj-y entries across linesPaul Burton1-3/+8
Split the obj-y entries for SEAD3 onto a line each, so that they're more independent & can be modified more clearly by later commits. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Jacek Anaszewski <j.anaszewski@samsung.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14046/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: pm-cps: Generate idle state entry code when CPUs are onlinedPaul Burton1-26/+19
The MIPS Coherent Processing System (CPS) power management code has previously generated code used to enter low power idle states once during boot for all CPUs. This has the drawback that if a CPU is present in the system but not being used (for example due to the maxcpus kernel parameter) then we encounter problems due to not having probed that CPU for information about its type & properties. The result of this is that we generate entry code which is both unused, potentially entirely invalid & likely to be unsuitable for the CPU in question anyway. Avoid this by generating idle state entry code only when a CPU is brought online. This way we only ever generate code for CPUs that we know we've probed the properties of, and that will actually be used. [ralf@linux-mips.org: Resolve merge conflict.] Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Adam Buchbinder <adam.buchbinder@gmail.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14259/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: kvm: Audit and remove any unnecessary uses of module.hPaul Gortmaker5-5/+0
Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. In the case of kvm where it is modular, we can extend that to also include files that are building basic support functionality but not related to loading or registering the final module; such files also have no need whatsoever for module.h The advantage in removing such instances is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h was the source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each instance for the presence of either and replace as needed. In this case, we did not need to add either to any files. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Acked-by: James Hogan <james.hogan@imgtec.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Cc: "Radim Krčmář" <rkrcmar@redhat.com> Cc: kvm@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14036/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: pci: Audit and remove any unnecessary uses of module.hPaul Gortmaker7-11/+3
Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. The advantage in doing so is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h was the source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each obj-y/bool instance for the presence of either and replace as needed. We also needed to remove the no-op MODULE_DEVICE_TABLE usage in several instances to permit removal of the module.h include. The files in these instances were all controlled by bool Kconfig. In one instance, module_param was being used so we transition the module.h include onto a moduleparam.h include. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14035/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: lib: Audit and remove any unnecessary uses of module.hPaul Gortmaker10-10/+12
Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. The advantage in doing so is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h was the source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each obj-y/bool instance for the presence of either and replace as needed. The compiler.h additions are for an implict presence of the "notrace" which module.h brought in but export.h does not. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14034/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: mm: Audit and remove any unnecessary uses of module.hPaul Gortmaker10-10/+9
Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. The advantage in doing so is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h was the source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each obj-y/bool instance for the presence of either and replace as needed. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14033/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: kernel: Audit and remove any unnecessary uses of module.hPaul Gortmaker6-18/+4
Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. The advantage in doing so is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h was the source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each obj-y/bool instance for the presence of either and replace as needed. In the case of the n32/o32 files, we have to get rid of a couple no-op MODULE_ tags to facilitate the module.h removal. They piggy back off the fs/ elf binary support, which is also a bool Kconfig. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14032/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: smp.c: Introduce mechanism for freeing and allocating IPIsMatt Redfearn2-8/+67
For the MIPS remote processor implementation, we need additional IPIs to talk to the remote processor. Since MIPS GIC reserves exactly the right number of IPI IRQs required by Linux for the number of VPs in the system, this is not possible without releasing some recources. This commit introduces mips_smp_ipi_allocate() which allocates IPIs to a given cpumask. It is called as normal with the cpu_possible_mask at bootup to initialise IPIs to all CPUs. mips_smp_ipi_free() may then be used to free IPIs to a subset of those CPUs so that their hardware resources can be reused. Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Cc: Ohad Ben-Cohen <ohad@wizery.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Lisa Parratt <Lisa.Parratt@imgtec.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Qais Yousef <qsyousef@gmail.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-remoteproc@vger.kernel.org Cc: lisa.parratt@imgtec.com Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14285/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: tlb-r4k: If there are wired entries, don't use TLBINVFMatt Redfearn1-2/+5
When adding a wired entry to the TLB via add_wired_entry, the tlb is flushed with local_flush_tlb_all, which on CPUs with TLBINV results in the new wired entry being flushed again. Behavior of the TLBINV instruction applies to all applicable TLB entries and is unaffected by the setting of the Wired register. Therefore if the TLB has any wired entries, fall back to iterating over the entries rather than blasting them all using TLBINVF. Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Cc: Ohad Ben-Cohen <ohad@wizery.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: lisa.parratt@imgtec.com Cc: Hugh Dickins <hughd@google.com> Cc: Huacai Chen <chenhc@lemote.com> Cc: David S. Miller <davem@davemloft.net> Cc: James Hogan <james.hogan@imgtec.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linux-mips@linux-mips.org Cc: linux-remoteproc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14283/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: c-r4k: Fix flush_icache_range() for EVAJames Hogan1-8/+35
flush_icache_range() flushes icache lines in a protected fashion for kernel addresses, however this isn't correct with EVA where protected cache ops only operate on user addresses, making flush_icache_range() ineffective. Split the implementations of __flush_icache_user_range() from flush_icache_range(), changing the normal flush_icache_range() to use unprotected normal cache ops. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Leonid Yegoshin <leonid.yegoshin@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14156/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05MIPS: KVM: Use __local_flush_icache_user_range()James Hogan1-2/+2
Convert KVM dynamic translation of guest instructions to flush icache for guest mapped addresses using the new __local_flush_icache_user_range() API to allow the more generic flush_icache_range() to be changed to work on kernel addresses only. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: "Radim Krčmář" <rkrcmar@redhat.com> Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14155/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-04MIPS: uprobes: Flush icache via kernel addressJames Hogan1-11/+6
Update arch_uprobe_copy_ixol() to use the kmap_atomic() based kernel address to flush the icache with flush_icache_range(), rather than the user mapping. We have the kernel mapping available anyway and this avoids having to switch to using the new __flush_icache_user_range() for the sake of Enhanced Virtual Addressing (EVA) where flush_icache_range() will become ineffective on user addresses. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Leonid Yegoshin <leonid.yegoshin@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14154/ Patchwork: https://patchwork.linux-mips.org/patch/14308/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-04MIPS: cacheflush: Use __flush_icache_user_range()James Hogan1-1/+1
The cacheflush(2) system call uses flush_icache_range() to flush a range of usermode addresses from the icache, so change it to utilise the new __flush_icache_user_range() API to allow the more generic flush_icache_range() to be changed to work on kernel addresses only. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Leonid Yegoshin <leonid.yegoshin@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14153/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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