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/linux/Documentation/arch/x86/
H A Dtopology.rst1 .. SPDX-License-Identifier: GPL-2.0
11 The architecture-agnostic topology definitions are in
12 Documentation/admin-guide/cputopology.rst. This file holds x86-specific
17 Needless to say, code should use the generic functions - this file is *only*
28 the past a socket always contained a single package (see below), but with the
35 - packages
36 - cores
37 - threads
48 Package-related topology information in the kernel:
50 - topology_num_threads_per_package()
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/linux/drivers/remoteproc/
H A Dti_k3_r5_remoteproc.c1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 2017-2022 Texas Instruments Incorporated - https://www.ti.com/
6 * Suman Anna <s-anna@ti.com>
9 #include <linux/dma-mapping.h>
19 #include <linux/omap-mailbox.h>
33 /* R5 TI-SCI Processor Configuration Flags */
47 /* R5 TI-SCI Processor Control Flags */
50 /* R5 TI-SCI Processor Status Flags */
59 * struct k3_r5_mem - internal memory structure
77 * Single-CPU mode : AM64x SoCs only
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/linux/Documentation/devicetree/bindings/arm/omap/
H A Dctrl.txt11 [1] Documentation/devicetree/bindings/pinctrl/pinctrl-single.yaml
15 - compatible: Must be one of:
16 "ti,am3-scm"
17 "ti,am4-scm"
18 "ti,dm814-scrm"
19 "ti,dm816-scrm"
20 "ti,omap2-scm"
21 "ti,omap3-scm"
22 "ti,omap4-scm-core"
23 "ti,omap4-scm-padconf-core"
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/linux/Documentation/devicetree/bindings/
H A Dexample-schema.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
4 ---
5 # All the top-level keys are standard json-schema keywords except for
10 $id: http://devicetree.org/schemas/example-schema.yaml#
11 # $schema is the meta-schema this schema should be validated with.
12 $schema: http://devicetree.org/meta-schemas/core.yaml#
17 - Rob Herring <robh@kernel.org>
20 A more detailed multi-line description of the binding.
44 - items:
51 - enum:
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H A Dtrivial-devices.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/trivial-devices.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Rob Herring <robh@kernel.org>
27 spi-max-frequency: true
32 - enum:
34 - acbel,fsg032
35 … # SMBus/I2C Digital Temperature Sensor in 6-Pin SOT with SMBus Alert and Over Temperature Pin
36 - ad,ad7414 # Deprecated, use adi,ad7414
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/linux/tools/perf/pmu-events/arch/arm64/arm/cortex-a55/
H A Dcache.json105 …unted, regardless of whether they allocate. If either the core is configured without a per-core L2…
108 …unted, regardless of whether they allocate. If either the core is configured without a per-core L2…
111core is configured with a per-core L2 cache: This event does not count. +//0 If the core is config…
114core is configured with a per-core L2 cache: This event does not count. +//0 If the core is config…
117 …This event counts any linefills from the prefetcher which cause an allocation into the L1 D-cache",
120 … This event counts any linefills from the prefetcher which cause an allocation into the L1 D-cache"
123 …he write streaming mode. This event counts for each cycle where the core is in write-streaming mod…
126 …he write streaming mode. This event counts for each cycle where the core is in write-streaming mod…
129 …ta cache entering write streaming mode.This event counts for each entry into write-streaming mode",
132 …ata cache entering write streaming mode.This event counts for each entry into write-streaming mode"
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/linux/tools/perf/pmu-events/arch/arm64/arm/cortex-a510/
H A Dcache.json102-complex L2 cache, this event does not count. If the complex is configured without a per-complex L…
105-complex L2 cache, this event does not count. If the complex is configured without a per-complex L…
114 …L2 cache write streaming mode. This event counts for each cycle where the core is in write streami…
117 …L2 cache write streaming mode. This event counts for each cycle where the core is in write streami…
126 …ta cache write streaming mode. This event counts for each cycle where the core is in write streami…
129 …ta cache write streaming mode. This event counts for each cycle where the core is in write streami…
132 …L3 cache write streaming mode. This event counts for each cycle where the core is in write streami…
135 …L3 cache write streaming mode. This event counts for each cycle where the core is in write streami…
138 …el cache write streaming mode. This event counts for each cycle where the core is in write streami…
141 …el cache write streaming mode. This event counts for each cycle where the core is in write streami…
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/linux/Documentation/devicetree/bindings/iio/adc/
H A Dst,stm32-adc.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/iio/adc/st,stm32-adc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 STM32 ADC is a successive approximation analog-to-digital converter.
12 in single, continuous, scan or discontinuous mode. Result of the ADC is
13 stored in a left-aligned or right-aligned 32-bit data register.
17 voltage goes beyond the user-defined, higher or lower thresholds.
22 - Fabrice Gasnier <fabrice.gasnier@foss.st.com>
27 - st,stm32f4-adc-core
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H A Dxilinx-xadc.txt16 communication. Xilinx provides a standard IP core that can be used to access the
17 System Monitor through an AXI interface in the FPGA fabric. This IP core is
22 - compatible: Should be one of
23 * "xlnx,zynq-xadc-1.00.a": When using the ZYNQ device
25 * "xlnx,axi-xadc-1.00.a": When using the axi-xadc pcore to
27 * "xlnx,system-management-wiz-1.3": When using the
28 Xilinx System Management Wizard fabric IP core to access the
30 - reg: Address and length of the register set for the device
31 - interrupts: Interrupt for the XADC control interface.
32 - clocks: When using the ZYNQ this must be the ZYNQ PCAP clock,
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/linux/Documentation/devicetree/bindings/clock/
H A Dpistachio-clock.txt4 Pistachio has four clock controllers (core clock, peripheral clock, peripheral
6 from the device-tree.
9 ----------------
12 defined with the following clock-output-names:
13 - "xtal": External 52Mhz oscillator (required)
14 - "audio_clk_in": Alternate audio reference clock (optional)
15 - "enet_clk_in": Alternate ethernet PHY clock (optional)
17 Core clock controller:
18 ----------------------
20 The core clock controller generates clocks for the CPU, RPU (WiFi + BT
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/linux/drivers/staging/media/atomisp/
H A Dnotes.txt6 The ISP has its own address-space and main memory needs to be mapped into
11 the hmm code finds the backing hmm-buffer-object (hmm_bo) by looking
25 So in this case a single binary handles the entire pipeline.
29 on the ISP can do multiple processing steps in a single pipeline
30 element (in a single binary).
36 the core atomisp code. The most important parts of the struct
37 are filled by the atomisp core itself, like e.g. the port number.
40 -metadata_width, metadata_height, metadata_effective_width, set by
41 the ov5693 driver (and used by the atomisp core)
42 -raw_bayer_order, adjusted by the ov2680 driver when flipping since
/linux/Documentation/devicetree/bindings/remoteproc/
H A Dti,k3-r5f-rproc.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/remoteproc/ti,k3-r5f-rproc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Suman Anna <s-anna@ti.com>
13 The TI K3 family of SoCs usually have one or more dual-core Arm Cortex R5F
14 processor subsystems/clusters (R5FSS). The dual core cluster can be used
20 AM64x SoCs do not support LockStep mode, but rather a new non-safety mode
21 called "Single-CPU" mode, where only Core0 is used, but with ability to use
24 AM62 SoC family support a single R5F core only which runs Device Manager
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/linux/drivers/gpu/drm/imagination/
H A Dpvr_rogue_fwif_client.h1 /* SPDX-License-Identifier: GPL-2.0-only OR MIT */
22 * Base page size is dependent on core:
27 * Minimum PB = Base Pages + (NUM_TE_PIPES-1)*16K + (NUM_VCE_PIPES-1)*64K +
40 * of 4GB minus the Minimum PB. For convenience we take the smaller power-of-2
51 /* Use single core in a multi core setup. */
58 /* Use single core in a multi core setup. */
78 /*!< Use single core in a multi core setup. */
85 /*!< Use single core in a multi core setup. */
252 /* Stride IN BYTES for Z-Buffer in case of RTAs. */
254 /* Stride IN BYTES for S-Buffer in case of RTAs. */
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/linux/tools/perf/pmu-events/arch/x86/icelakex/
H A Dother.json3 …"BriefDescription": "Core cycles where the core was running in a manner where Turbo may be clipped…
7Core cycles where the core was running with power-delivery for baseline license level 0. This inc…
12 …"BriefDescription": "Core cycles where the core was running in a manner where Turbo may be clipped…
16Core cycles where the core was running with power-delivery for license level 1. This includes hig…
21 …"BriefDescription": "Core cycles where the core was running in a manner where Turbo may be clipped…
25Core cycles where the core was running with power-delivery for license level 2 (introduced in Skyl…
34core's cache, after the data is forwarded back to the requestor and indicating the data was found …
43core's caches, after the data is forwarded back to the requestor, and indicating the data was foun…
52core's caches without being forwarded back to the requestor. The line was in Forward, Shared or Ex…
61 … was not found (IHitI) in this core's caches. A single snoop response from the core counts on all …
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/linux/Documentation/driver-api/
H A Dedac.rst5 ----------------------------------------
8 *sockets, *socket sets*, *banks*, *rows*, *chip-select rows*, *channels*,
32 A physical connector on the motherboard that accepts a single memory
43 It is typically the highest hierarchy on a Fully-Buffered DIMM memory
45 same branch can be used in single mode or in lockstep mode. When
50 of correcting more errors than on single mode.
52 * Single-channel
55 only. E. g. if the data is 64 bits-wide, the data flows to the CPU using
57 memories. FB-DIMM and RAMBUS use a different concept for channel, so
60 * Double-channel
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H A Dxillybus.rst10 - Introduction
11 -- Background
12 -- Xillybus Overview
14 - Usage
15 -- User interface
16 -- Synchronization
17 -- Seekable pipes
19 - Internals
20 -- Source code organization
21 -- Pipe attributes
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/linux/tools/perf/pmu-events/arch/arm64/arm/cortex-a65-e1/
H A Dcache.json111 … prefetch. Counts any linefills from the prefetcher which cause an allocation into the L1 D-cache",
114 …o prefetch. Counts any linefills from the prefetcher which cause an allocation into the L1 D-cache"
117core is configured with a per-core L2 cache: This event does not count. +//0 If the core is config…
120core is configured with a per-core L2 cache: This event does not count. +//0 If the core is config…
123 …unted, regardless of whether they allocate. If either the core is configured without a per-core L2…
126 …unted, regardless of whether they allocate. If either the core is configured without a per-core L2…
141 …he write streaming mode. This event counts for each cycle where the core is in write-streaming mod…
144 …he write streaming mode. This event counts for each cycle where the core is in write-streaming mod…
147 …he write streaming mode. This event counts for each cycle where the core is in write-streaming mod…
150 …he write streaming mode. This event counts for each cycle where the core is in write-streaming mod…
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/linux/Documentation/devicetree/bindings/cpu/
H A Dcpu-topology.txt6 1 - Introduction
12 - socket
13 - cluster
14 - core
15 - thread
17 The bottom hierarchy level sits at core or thread level depending on whether
18 symmetric multi-threading (SMT) is supported or not.
23 in the system and map to the hierarchy level "core" above.
29 Currently, only ARM/RISC-V intend to use this cpu topology binding but it may be
39 2 - cpu-map node
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/linux/Documentation/devicetree/bindings/interrupt-controller/
H A Dapple,aic2.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/interrupt-controller/apple,aic2.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Hector Martin <marcan@marcan.st>
18 - Level-triggered hardware IRQs wired to SoC blocks
19 - Single mask bit per IRQ
20 - Automatic masking on event delivery (auto-ack)
21 - Software triggering (ORed with hw line)
22 - Automatic prioritization (single event/ack register per CPU, lower IRQs =
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/linux/Documentation/devicetree/bindings/display/bridge/
H A Dite,it66121.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Phong LE <ple@baylibre.com>
11 - Neil Armstrong <neil.armstrong@linaro.org>
14 The IT66121 is a high-performance and low-power single channel HDMI
21 - ite,it66121
22 - ite,it6610
27 reset-gpios:
31 vrf12-supply:
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/linux/include/media/
H A Dtuner.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * tuner.h - definition for different tuners
5 * Copyright (C) 1997 Markus Schroeder (schroedm@uni-duesseldorf.de)
6 * minor modifications by Ralph Metzler (rjkm@thp.uni-koeln.de)
14 #include <media/v4l2-mc.h>
73 #define TUNER_PHILIPS_4IN1 44 /* ATI TV Wonder Pro - Conexant */
83 #define TUNER_MICROTUNE_4042FI5 49 /* DViCO FusionHDTV 3 Gold-Q - 4042 FI5 (3X 8147) */
90 #define TUNER_TCL_2002MB 55 /* Hauppauge PVR-150 PAL */
92 #define TUNER_PHILIPS_FQ1216AME_MK4 56 /* Hauppauge PVR-150 PAL */
93 #define TUNER_PHILIPS_FQ1236A_MK4 57 /* Hauppauge PVR-500MCE NTSC */
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/linux/drivers/hwspinlock/
H A Dhwspinlock_internal.h1 /* SPDX-License-Identifier: GPL-2.0 */
5 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com
7 * Contact: Ohad Ben-Cohen <ohad@wizery.com>
19 * struct hwspinlock_ops - platform-specific hwspinlock handlers
21 * @trylock: make a single attempt to take the lock. returns 0 on
24 * @bust: optional, platform-specific bust handler, called by hwspinlock
25 * core to bust a specific lock.
26 * @relax: optional, platform-specific relax handler, called by hwspinlock
27 * core while spinning on a lock, between two successive
38 * struct hwspinlock - this struct represents a single hwspinlock instance
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/linux/Documentation/networking/device_drivers/ethernet/chelsio/
H A Dcxgb.rst1 .. SPDX-License-Identifier: GPL-2.0
35 Adaptive Interrupts (adaptive-rx)
36 ---------------------------------
46 By default, adaptive-rx is disabled.
47 To enable adaptive-rx::
49 ethtool -C <interface> adaptive-rx on
51 To disable adaptive-rx, use ethtool::
53 ethtool -C <interface> adaptive-rx off
55 After disabling adaptive-rx, the timer latency value will be set to 50us.
56 You may set the timer latency after disabling adaptive-rx::
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/linux/Documentation/devicetree/bindings/pci/
H A Dbaikal,bt1-pcie.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/pci/baikal,bt1-pcie.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Baikal-T1 PCIe Root Port Controller
10 - Serge Semin <fancer.lancer@gmail.com>
13 Embedded into Baikal-T1 SoC Root Complex controller with a single port
14 activated. It's based on the DWC RC PCIe v4.60a IP-core, which is configured
15 to have just a single Root Port function and is capable of establishing the
18 performed by software. There four in- and four outbound iATU regions
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/linux/Documentation/process/
H A Dmaintainer-tip.rst1 .. SPDX-License-Identifier: GPL-2.0
7 ---------------------
11 aggregation tree for several sub-maintainer trees. The tip tree gitweb URL
16 - **x86 architecture**
22 x86-specific KVM and XEN patches.
30 mail alias which distributes mails to the x86 top-level maintainer
32 ``linux-kernel@vger.kernel.org``, otherwise your mail ends up only in
35 - **Scheduler**
37 Scheduler development takes place in the -tip tree, in the
38 sched/core branch - with occasional sub-topic trees for
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