| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/reserved-memory/ |
| D | reserved-memory.txt | 1 *** Reserved memory regions ***
3 Reserved memory is specified as a node under the /reserved-memory node.
4 The operating system shall exclude reserved memory from normal usage
5 one can create child nodes describing particular reserved (excluded from
6 normal use) memory regions. Such memory regions are usually designed for
9 Parameters for each memory region can be encoded into the device tree
12 /reserved-memory node
13 ---------------------
14 #address-cells, #size-cells (required) - standard definition
15 - Should use the same values as the root node
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| /kernel/linux/linux-6.6/tools/testing/memblock/tests/ |
| D | basic_api.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
17 ASSERT_NE(memblock.memory.regions, NULL); in memblock_initialization_check()
18 ASSERT_EQ(memblock.memory.cnt, 1); in memblock_initialization_check()
19 ASSERT_EQ(memblock.memory.max, EXPECTED_MEMBLOCK_REGIONS); in memblock_initialization_check()
20 ASSERT_EQ(strcmp(memblock.memory.name, "memory"), 0); in memblock_initialization_check()
22 ASSERT_NE(memblock.reserved.regions, NULL); in memblock_initialization_check()
23 ASSERT_EQ(memblock.reserved.cnt, 1); in memblock_initialization_check()
24 ASSERT_EQ(memblock.memory.max, EXPECTED_MEMBLOCK_REGIONS); in memblock_initialization_check()
25 ASSERT_EQ(strcmp(memblock.reserved.name, "reserved"), 0); in memblock_initialization_check()
36 * A simple test that adds a memory block of a specified base address
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| D | alloc_helpers_api.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * A simple test that tries to allocate a memory region above a specified,
9 * | +-----------+ |
11 * +----------+-----------+---------+
16 * Expect to allocate a cleared region at the minimal memory address.
20 struct memblock_region *rgn = &memblock.reserved.regions[0]; in alloc_from_simple_generic_check()
28 min_addr = memblock_end_of_DRAM() - SMP_CACHE_BYTES; in alloc_from_simple_generic_check()
35 ASSERT_EQ(rgn->size, size); in alloc_from_simple_generic_check()
36 ASSERT_EQ(rgn->base, min_addr); in alloc_from_simple_generic_check()
38 ASSERT_EQ(memblock.reserved.cnt, 1); in alloc_from_simple_generic_check()
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| D | alloc_api.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
21 * A simple test that tries to allocate a small memory region.
22 * Expect to allocate an aligned region near the end of the available memory.
26 struct memblock_region *rgn = &memblock.reserved.regions[0]; in alloc_top_down_simple_check()
34 expected_start = memblock_end_of_DRAM() - SMP_CACHE_BYTES; in alloc_top_down_simple_check()
41 ASSERT_EQ(rgn->size, size); in alloc_top_down_simple_check()
42 ASSERT_EQ(rgn->base, expected_start); in alloc_top_down_simple_check()
44 ASSERT_EQ(memblock.reserved.cnt, 1); in alloc_top_down_simple_check()
45 ASSERT_EQ(memblock.reserved.total_size, size); in alloc_top_down_simple_check()
53 * A test that tries to allocate memory next to a reserved region that starts at
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| D | alloc_nid_api.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
51 * A simple test that tries to allocate a memory region within min_addr and
55 * | + +-----------+ |
57 * +----+-------+-----------+------+
66 struct memblock_region *rgn = &memblock.reserved.regions[0]; in alloc_nid_top_down_simple_check()
82 rgn_end = rgn->base + rgn->size; in alloc_nid_top_down_simple_check()
87 ASSERT_EQ(rgn->size, size); in alloc_nid_top_down_simple_check()
88 ASSERT_EQ(rgn->base, max_addr - size); in alloc_nid_top_down_simple_check()
91 ASSERT_EQ(memblock.reserved.cnt, 1); in alloc_nid_top_down_simple_check()
92 ASSERT_EQ(memblock.reserved.total_size, size); in alloc_nid_top_down_simple_check()
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| D | alloc_exact_nid_api.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
23 * A test that tries to allocate a memory region in a specific NUMA node that
24 * has enough memory to allocate a region of the requested size.
30 struct memblock_region *new_rgn = &memblock.reserved.regions[0]; in alloc_exact_nid_top_down_numa_simple_check()
31 struct memblock_region *req_node = &memblock.memory.regions[nid_req]; in alloc_exact_nid_top_down_numa_simple_check()
40 ASSERT_LE(SZ_4, req_node->size); in alloc_exact_nid_top_down_numa_simple_check()
41 size = req_node->size / SZ_4; in alloc_exact_nid_top_down_numa_simple_check()
52 ASSERT_EQ(new_rgn->size, size); in alloc_exact_nid_top_down_numa_simple_check()
53 ASSERT_EQ(new_rgn->base, region_end(req_node) - size); in alloc_exact_nid_top_down_numa_simple_check()
54 ASSERT_LE(req_node->base, new_rgn->base); in alloc_exact_nid_top_down_numa_simple_check()
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| /kernel/linux/linux-6.6/Documentation/devicetree/bindings/reserved-memory/ |
| D | reserved-memory.yaml | 1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/reserved-memory/reserved-memory.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: /reserved-memory Child Node Common
10 - devicetree-spec@vger.kernel.org
13 Reserved memory is specified as a node under the /reserved-memory node. The
14 operating system shall exclude reserved memory from normal usage one can
15 create child nodes describing particular reserved (excluded from normal use)
16 memory regions. Such memory regions are usually designed for the special
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| D | memory-region.yaml | 1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/reserved-memory/memory-region.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Reserved Memory Region
10 - devicetree-spec@vger.kernel.org
13 Regions in the /reserved-memory node may be referenced by other device
14 nodes by adding a memory-region property to the device node.
19 memory-region:
20 $ref: /schemas/types.yaml#/definitions/phandle-array
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| /kernel/linux/linux-6.6/Documentation/powerpc/ |
| D | firmware-assisted-dump.rst | 2 Firmware-Assisted Dump
7 The goal of firmware-assisted dump is to enable the dump of
8 a crashed system, and to do so from a fully-reset system, and
12 - Firmware-Assisted Dump (FADump) infrastructure is intended to replace
14 - Fadump uses the same firmware interfaces and memory reservation model
16 - Unlike phyp dump, FADump exports the memory dump through /proc/vmcore
19 - Unlike phyp dump, userspace tool does not need to refer any sysfs
21 - Unlike phyp dump, FADump allows user to release all the memory reserved
23 - Once enabled through kernel boot parameter, FADump can be
28 Comparing with kdump or other strategies, firmware-assisted
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| /kernel/linux/linux-5.10/Documentation/powerpc/ |
| D | firmware-assisted-dump.rst | 2 Firmware-Assisted Dump
7 The goal of firmware-assisted dump is to enable the dump of
8 a crashed system, and to do so from a fully-reset system, and
12 - Firmware-Assisted Dump (FADump) infrastructure is intended to replace
14 - Fadump uses the same firmware interfaces and memory reservation model
16 - Unlike phyp dump, FADump exports the memory dump through /proc/vmcore
19 - Unlike phyp dump, userspace tool does not need to refer any sysfs
21 - Unlike phyp dump, FADump allows user to release all the memory reserved
23 - Once enabled through kernel boot parameter, FADump can be
28 Comparing with kdump or other strategies, firmware-assisted
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| /kernel/linux/linux-5.10/kernel/dma/ |
| D | contiguous.c | 1 // SPDX-License-Identifier: GPL-2.0+
3 * Contiguous Memory Allocator for DMA mapping framework
4 * Copyright (c) 2010-2011 by Samsung Electronics.
9 * Contiguous Memory Allocator
11 * The Contiguous Memory Allocator (CMA) makes it possible to
12 * allocate big contiguous chunks of memory after the system has
17 * Various devices on embedded systems have no scatter-getter and/or
18 * IO map support and require contiguous blocks of memory to
22 * Such devices often require big memory buffers (a full HD frame
24 * MB of memory), which makes mechanisms such as kmalloc() or
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| /kernel/linux/linux-6.6/include/linux/ |
| D | memblock.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
6 * Logical memory blocks.
28 * enum memblock_flags - definition of memory region attributes
30 * @MEMBLOCK_HOTPLUG: memory region indicated in the firmware-provided memory
31 * map during early boot as hot(un)pluggable system RAM (e.g., memory range
33 * commandline, try keeping this memory region hotunpluggable. Does not apply
37 * reserved in the memory map; refer to memblock_mark_nomap() description
39 * @MEMBLOCK_DRIVER_MANAGED: memory region that is always detected and added
40 * via a driver, and never indicated in the firmware-provided memory map as
53 * struct memblock_region - represents a memory region
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| /kernel/linux/linux-5.10/drivers/staging/media/atomisp/include/hmm/ |
| D | hmm_pool.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
5 * Copyright (c) 2010 Intel Corporation. All Rights Reserved.
40 * struct hmm_pool_ops - memory pool callbacks.
42 * @pool_init: initialize the memory pool.
43 * @pool_exit: uninitialize the memory pool.
44 * @pool_alloc_pages: allocate pages from memory pool.
45 * @pool_free_pages: free pages to memory pool.
46 * @pool_inited: check whether memory pool is initialized.
66 * struct hmm_reserved_pool_info - represents reserved pool private data.
68 * The array is as reserved memory pool.
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| /kernel/linux/linux-6.6/Documentation/arch/arm64/ |
| D | kdump.rst | 2 crashkernel memory reservation on arm64
9 reserved memory is needed to pre-load the kdump kernel and boot such
12 That reserved memory for kdump is adapted to be able to minimally
19 Through the kernel parameters below, memory can be reserved accordingly
21 large chunk of memomy can be found. The low memory reservation needs to
22 be considered if the crashkernel is reserved from the high memory area.
24 - crashkernel=size@offset
25 - crashkernel=size
26 - crashkernel=size,high crashkernel=size,low
28 Low memory and high memory
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| /kernel/liteos_m/arch/risc-v/nuclei/gcc/nmsis/Core/Include/ |
| D | core_feature_base.h | 2 * Copyright (c) 2019 Nuclei Limited. All rights reserved.
4 * SPDX-License-Identifier: Apache-2.0
10 * www.apache.org/licenses/LICENSE-2.0
47 /** \brief Type of Control and Status Register(CSR), depends on the XLEN defined in RISC-V */
69 …rv_csr_t b:1; /*!< bit: 1 Tentatively reserved for Bit-Manipulation…
71 …rv_csr_t d:1; /*!< bit: 3 Double-precision floating-point extension…
73 …rv_csr_t f:1; /*!< bit: 5 Single-precision floating-point extension…
77 …rv_csr_t j:1; /*!< bit: 9 Tentatively reserved for Dynamically Tran…
78 rv_csr_t _reserved1:1; /*!< bit: 10 Reserved */
79 … l:1; /*!< bit: 11 Tentatively reserved for Decimal Floating-Point e…
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| /kernel/linux/linux-6.6/Documentation/devicetree/bindings/remoteproc/ |
| D | ti,davinci-rproc.txt | 4 Binding status: Unstable - Subject to changes for DT representation of clocks
7 The TI Davinci family of SoCs usually contains a TI DSP Core sub-system that
8 is used to offload some of the processor-intensive tasks or algorithms, for
11 The processor cores in the sub-system usually contain additional sub-modules
12 like L1 and/or L2 caches/SRAMs, an Interrupt Controller, an external memory
18 Each DSP Core sub-system is represented as a single DT node.
21 --------------------
24 - compatible: Should be one of the following,
25 "ti,da850-dsp" for DSPs on OMAP-L138 SoCs
27 - reg: Should contain an entry for each value in 'reg-names'.
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/remoteproc/ |
| D | ti,davinci-rproc.txt | 4 Binding status: Unstable - Subject to changes for DT representation of clocks
7 The TI Davinci family of SoCs usually contains a TI DSP Core sub-system that
8 is used to offload some of the processor-intensive tasks or algorithms, for
11 The processor cores in the sub-system usually contain additional sub-modules
12 like L1 and/or L2 caches/SRAMs, an Interrupt Controller, an external memory
18 Each DSP Core sub-system is represented as a single DT node.
21 --------------------
24 - compatible: Should be one of the following,
25 "ti,da850-dsp" for DSPs on OMAP-L138 SoCs
27 - reg: Should contain an entry for each value in 'reg-names'.
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| /kernel/linux/linux-6.6/kernel/dma/ |
| D | contiguous.c | 1 // SPDX-License-Identifier: GPL-2.0+
3 * Contiguous Memory Allocator for DMA mapping framework
4 * Copyright (c) 2010-2011 by Samsung Electronics.
9 * Contiguous Memory Allocator
11 * The Contiguous Memory Allocator (CMA) makes it possible to
12 * allocate big contiguous chunks of memory after the system has
17 * Various devices on embedded systems have no scatter-getter and/or
18 * IO map support and require contiguous blocks of memory to
22 * Such devices often require big memory buffers (a full HD frame
24 * MB of memory), which makes mechanisms such as kmalloc() or
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| /kernel/linux/linux-5.10/include/linux/ |
| D | memblock.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
7 * Logical memory blocks.
29 * enum memblock_flags - definition of memory region attributes
43 * struct memblock_region - represents a memory region
46 * @flags: memory region attributes
59 * struct memblock_type - collection of memory regions of certain type
64 * @name: the memory type symbolic name
75 * struct memblock - memblock allocator metadata
78 * @memory: usable memory regions
79 * @reserved: reserved memory regions
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| /kernel/linux/linux-6.6/Documentation/devicetree/bindings/watchdog/ |
| D | ti,rti-wdt.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/watchdog/ti,rti-wdt.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Tero Kristo <t-kristo@ti.com>
21 - $ref: watchdog.yaml#
26 - ti,j7-rti-wdt
34 power-domains:
37 memory-region:
40 Contains the watchdog reserved memory. It is optional.
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| /kernel/linux/linux-6.6/drivers/net/ethernet/ti/icssg/ |
| D | icssg_switch_map.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
4 * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
49 /* VLAN-FID Table offset. 4096 VIDs. 2B per VID = 8KB = 0x2000 */
52 /* VLAN-FID Table offset for EMAC */
55 /* Packet descriptor Q reserved memory */
58 /* Packet descriptor Q reserved memory */
61 /* Packet descriptor Q reserved memory */
64 /* Packet descriptor Q reserved memory */
67 /* Packet descriptor Q reserved memory */
70 /* Packet descriptor Q reserved memory */
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| /kernel/linux/linux-6.6/Documentation/devicetree/bindings/soc/fsl/ |
| D | qman.txt | 3 Copyright (C) 2008 - 2014 Freescale Semiconductor Inc.
7 - QMan Node
8 - QMan Private Memory Nodes
9 - Example
13 The Queue Manager is part of the Data-Path Acceleration Architecture (DPAA). QMan
16 flow-level queuing, is also responsible for congestion management functions such
22 - compatible
26 May include "fsl,<SoC>-qman"
28 - reg
30 Value type: <prop-encoded-array>
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/soc/fsl/ |
| D | qman.txt | 3 Copyright (C) 2008 - 2014 Freescale Semiconductor Inc.
7 - QMan Node
8 - QMan Private Memory Nodes
9 - Example
13 The Queue Manager is part of the Data-Path Acceleration Architecture (DPAA). QMan
16 flow-level queuing, is also responsible for congestion management functions such
22 - compatible
26 May include "fsl,<SoC>-qman"
28 - reg
30 Value type: <prop-encoded-array>
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| /kernel/linux/linux-6.6/drivers/of/ |
| D | of_reserved_mem.c | 1 // SPDX-License-Identifier: GPL-2.0+
3 * Device tree based initialization code for reserved memory.
5 * Copyright (c) 2013, 2015 The Linux Foundation. All Rights Reserved.
12 #define pr_fmt(fmt) "OF: reserved mem: " fmt
44 return -ENOMEM; in early_init_dt_alloc_reserved_memory_arch()
60 * fdt_reserved_mem_save_node() - save fdt node for second pass initialization
72 rmem->fdt_node = node; in fdt_reserved_mem_save_node()
73 rmem->name = uname; in fdt_reserved_mem_save_node()
74 rmem->base = base; in fdt_reserved_mem_save_node()
75 rmem->size = size; in fdt_reserved_mem_save_node()
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| /kernel/linux/linux-6.6/arch/powerpc/kernel/ |
| D | fadump.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
6 * memory contents. The most of the code implementation has been adapted
33 #include <asm/fadump-internal.h>
58 #define RESERVED_RNGS_SZ 16384 /* 16K - 128 entries */
63 reserved_mrange_info = { "reserved", rngs, RESERVED_RNGS_SZ, 0, RESERVED_RNGS_CNT, true };
71 * fadump_cma_init() - Initialize CMA area from a fadump reserved memory
73 * This function initializes CMA area from fadump reserved memory.
74 * The total size of fadump reserved memory covers for boot memory size
76 * Initialize only the area equivalent to boot memory size for CMA use.
77 * The remaining portion of fadump reserved memory will be not given
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