| /linux-5.10/arch/riscv/boot/dts/sifive/ |
| D | fu540-c000.dtsi | 1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
2 /* Copyright (c) 2018-2019 SiFive, Inc */
4 /dts-v1/;
6 #include <dt-bindings/clock/sifive-fu540-prci.h>
9 #address-cells = <2>;
10 #size-cells = <2>;
11 compatible = "sifive,fu540-c000", "sifive,fu540";
23 #address-cells = <1>;
24 #size-cells = <0>;
28 i-cache-block-size = <64>;
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| /linux-5.10/fs/squashfs/ |
| D | file.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Squashfs - a compressed read only filesystem for Linux
14 * compressed fragment block (tail-end packed block). The compressed size
15 * of each datablock is stored in a block list contained within the
19 * larger), the code implements an index cache that caches the mapping from
20 * block index to datablock location on disk.
22 * The index cache allows Squashfs to handle large files (up to 1.75 TiB) while
23 * retaining a simple and space-efficient block list on disk. The cache
26 * The index cache is designed to be memory efficient, and by default uses
44 * Locate cache slot in range [offset, index] for specified inode. If
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| D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
3 tristate "SquashFS 4.0 - Squashed file system support"
4 depends on BLOCK
7 Read-Only File System). Squashfs is a highly compressed read-only
11 Block sizes greater than 4K are supported up to a maximum of 1 Mbytes
12 (default block size 128K). SquashFS 4.0 supports 64 bit filesystems
16 Squashfs is intended for general read-only filesystem use, for
17 archival use (i.e. in cases where a .tar.gz file may be used), and in
35 intermediate buffer and then memcopied it into the page cache.
37 the page cache.
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| D | cache.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Squashfs - a compressed read only filesystem for Linux
8 * cache.c
15 * This file implements a generic cache implementation used for both caches,
16 * plus functions layered ontop of the generic cache implementation to
19 * To avoid out of memory and fragmentation issues with vmalloc the cache
22 * It should be noted that the cache is not used for file datablocks, these
23 * are decompressed and cached in the page-cache in the normal way. The
24 * cache is only used to temporarily cache fragment and metadata blocks
25 * which have been read as as a result of a metadata (i.e. inode or
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| D | file_direct.c | 1 // SPDX-License-Identifier: GPL-2.0-only
21 static int squashfs_read_cache(struct page *target_page, u64 block, int bsize,
24 /* Read separately compressed datablock directly into page cache */
25 int squashfs_readpage_block(struct page *target_page, u64 block, int bsize, in squashfs_readpage_block() argument
29 struct inode *inode = target_page->mapping->host; in squashfs_readpage_block()
30 struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info; in squashfs_readpage_block()
32 int file_end = (i_size_read(inode) - 1) >> PAGE_SHIFT; in squashfs_readpage_block()
33 int mask = (1 << (msblk->block_log - PAGE_SHIFT)) - 1; in squashfs_readpage_block()
34 int start_index = target_page->index & ~mask; in squashfs_readpage_block()
36 int i, n, pages, missing_pages, bytes, res = -ENOMEM; in squashfs_readpage_block() local
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| /linux-5.10/fs/affs/ |
| D | file.c | 1 // SPDX-License-Identifier: GPL-2.0
5 * (c) 1996 Hans-Joachim Widmaier - Rewritten
7 * (C) 1993 Ray Burr - Modified for Amiga FFS filesystem.
11 * (C) 1991 Linus Torvalds - minix filesystem
26 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt)); in affs_file_open()
27 atomic_inc(&AFFS_I(inode)->i_opencnt); in affs_file_open()
35 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt)); in affs_file_release()
37 if (atomic_dec_and_test(&AFFS_I(inode)->i_opencnt)) { in affs_file_release()
39 if (inode->i_size != AFFS_I(inode)->mmu_private) in affs_file_release()
51 struct super_block *sb = inode->i_sb; in affs_grow_extcache()
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| D | Changes | 1 (Note: I consider version numbers as cheap. That means
2 that I do not like numbers like 0.1 and the like for
7 -----------
9 - Doesn't work on the alpha. The only 64/32-bit
10 problem that I'm aware of (pointer/int conversion
13 reads basically work (but all files are of size 0).
14 Alas, I've got no alpha to debug. :-(
16 - The partition checker (drivers/block/genhd.c)
20 - The feature to automatically make the fs clean
24 - When a file is truncated to a size that is not
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| /linux-5.10/arch/powerpc/kernel/ |
| D | cacheinfo.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * Processor cache information made available to userspace via sysfs;
27 /* per-cpu object for tracking:
28 * - a "cache" kobject for the top-level directory
29 * - a list of "index" objects representing the cpu's local cache hierarchy
32 struct kobject *kobj; /* bare (not embedded) kobject for cache
37 /* "index" object: each cpu's cache directory has an index
38 * subdirectory corresponding to a cache object associated with the
44 struct cache *cache; member
48 * cache type */
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| /linux-5.10/arch/riscv/kernel/ |
| D | cacheinfo.c | 1 // SPDX-License-Identifier: GPL-2.0-only
22 if (rv_cache_ops && rv_cache_ops->get_priv_group) in cache_get_priv_group()
23 return rv_cache_ops->get_priv_group(this_leaf); in cache_get_priv_group()
33 for (index = 0; index < this_cpu_ci->num_leaves; index++) { in get_cacheinfo()
34 this_leaf = this_cpu_ci->info_list + index; in get_cacheinfo()
35 if (this_leaf->level == level && this_leaf->type == type) in get_cacheinfo()
46 return this_leaf ? this_leaf->size : 0; in get_cache_size()
53 return this_leaf ? (this_leaf->ways_of_associativity << 16 | in get_cache_geometry()
54 this_leaf->coherency_line_size) : in get_cache_geometry()
59 unsigned int level, unsigned int size, in ci_leaf_init() argument
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| /linux-5.10/arch/riscv/boot/dts/kendryte/ |
| D | k210.dtsi | 1 // SPDX-License-Identifier: GPL-2.0+
6 #include <dt-bindings/clock/k210-clk.h>
10 * Although the K210 is a 64-bit CPU, the address bus is only 32-bits
13 #address-cells = <1>;
14 #size-cells = <1>;
23 * Since this is a non-ratified draft specification, the kernel does not
28 #address-cells = <1>;
29 #size-cells = <0>;
30 timebase-frequency = <7800000>;
36 mmu-type = "none";
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| /linux-5.10/Documentation/devicetree/bindings/riscv/ |
| D | cpus.yaml | 1 # SPDX-License-Identifier: (GPL-2.0 OR MIT)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: RISC-V bindings for 'cpus' DT nodes
10 - Paul Walmsley <paul.walmsley@sifive.com>
11 - Palmer Dabbelt <palmer@sifive.com>
14 This document uses some terminology common to the RISC-V community
18 mandated by the RISC-V ISA: a PC and some registers. This
28 - items:
29 - enum:
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| /linux-5.10/Documentation/admin-guide/ |
| D | bcache.rst | 2 A block layer cache (bcache)
6 nice if you could use them as cache... Hence bcache.
11 This is the git repository of bcache-tools:
12 https://git.kernel.org/pub/scm/linux/kernel/git/colyli/bcache-tools.git/
17 It's designed around the performance characteristics of SSDs - it only allocates
18 in erase block sized buckets, and it uses a hybrid btree/log to track cached
19 extents (which can be anywhere from a single sector to the bucket size). It's
20 designed to avoid random writes at all costs; it fills up an erase block
25 great lengths to protect your data - it reliably handles unclean shutdown. (It
29 Writeback caching can use most of the cache for buffering writes - writing
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| /linux-5.10/arch/powerpc/include/asm/ |
| D | vdso_datapage.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
61 __u64 physicalMemorySize; /* Size of real memory(B) 0x28 */
69 __u32 dcache_size; /* L1 d-cache size 0x60 */
70 __u32 dcache_line_size; /* L1 d-cache line size 0x64 */
71 __u32 icache_size; /* L1 i-cache size 0x68 */
72 __u32 icache_line_size; /* L1 i-cache line size 0x6C */
77 __u32 dcache_block_size; /* L1 d-cache block size */
78 __u32 icache_block_size; /* L1 i-cache block size */
79 __u32 dcache_log_block_size; /* L1 d-cache log block size */
80 __u32 icache_log_block_size; /* L1 i-cache log block size */
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| /linux-5.10/drivers/md/ |
| D | dm-cache-target.c | 8 #include "dm-bio-prison-v2.h"
9 #include "dm-bio-record.h"
10 #include "dm-cache-metadata.h"
12 #include <linux/dm-io.h>
13 #include <linux/dm-kcopyd.h>
22 #define DM_MSG_PREFIX "cache"
25 "A percentage of time allocated for copying to and/or from cache");
27 /*----------------------------------------------------------------*/
32 * oblock: index of an origin block
33 * cblock: index of a cache block
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| D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
3 # Block device driver configuration
8 depends on BLOCK
20 logical block device. This can be used to simply append one
29 Software RAID mini-HOWTO, available from
44 a several-second delay in the boot time due to various
54 use the so-called linear mode, i.e. it will combine the hard disk
63 tristate "RAID-0 (striping) mode"
67 use the so-called raid0 mode, i.e. it will combine the hard disk
73 Software-RAID mini-HOWTO, available from
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| /linux-5.10/arch/powerpc/boot/dts/ |
| D | iss4xx-mpic.dts | 15 /dts-v1/;
20 #address-cells = <2>;
21 #size-cells = <1>;
22 model = "ibm,iss-4xx";
23 compatible = "ibm,iss-4xx";
24 dcr-parent = <&{/cpus/cpu@0}>;
31 #address-cells = <1>;
32 #size-cells = <0>;
38 clock-frequency = <100000000>; // 100Mhz :-)
39 timebase-frequency = <100000000>;
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| /linux-5.10/Documentation/filesystems/ |
| D | squashfs.rst | 1 .. SPDX-License-Identifier: GPL-2.0
7 Squashfs is a compressed read-only filesystem for Linux.
11 minimise data overhead. Block sizes greater than 4K are supported up to a
12 maximum of 1Mbytes (default block size 128K).
14 Squashfs is intended for general read-only filesystem use, for archival
15 use (i.e. in cases where a .tar.gz file may be used), and in constrained
16 block device/memory systems (e.g. embedded systems) where low overhead is
19 Mailing list: squashfs-devel@lists.sourceforge.net
23 ----------------------
30 Max filesystem size 2^64 256 MiB
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| /linux-5.10/Documentation/admin-guide/device-mapper/ |
| D | dm-clone.rst | 1 .. SPDX-License-Identifier: GPL-2.0-only
4 dm-clone
10 dm-clone is a device mapper target which produces a one-to-one copy of an
11 existing, read-only source device into a writable destination device: It
12 presents a virtual block device which makes all data appear immediately, and
15 The main use case of dm-clone is to clone a potentially remote, high-latency,
16 read-only, archival-type block device into a writable, fast, primary-type device
17 for fast, low-latency I/O. The cloned device is visible/mountable immediately
19 background, in parallel with user I/O.
21 For example, one could restore an application backup from a read-only copy,
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| D | cache.rst | 2 Cache title
8 dm-cache is a device mapper target written by Joe Thornber, Heinz
11 It aims to improve performance of a block device (eg, a spindle) by
15 This device-mapper solution allows us to insert this caching at
17 a thin-provisioning pool. Caching solutions that are integrated more
20 The target reuses the metadata library used in the thin-provisioning
23 The decision as to what data to migrate and when is left to a plug-in
32 Movement of the primary copy of a logical block from one
39 The origin device always contains a copy of the logical block, which
40 may be out of date or kept in sync with the copy on the cache device
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| /linux-5.10/fs/btrfs/ |
| D | block-group.c | 1 // SPDX-License-Identifier: GPL-2.0
5 #include "block-group.h"
6 #include "space-info.h"
7 #include "disk-io.h"
8 #include "free-space-cache.h"
9 #include "free-space-tree.h"
12 #include "ref-verify.h"
14 #include "tree-log.h"
15 #include "delalloc-space.h"
27 struct btrfs_balance_control *bctl = fs_info->balance_ctl; in get_restripe_target()
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| /linux-5.10/arch/sh/boot/dts/ |
| D | j2_mimas_v2.dts | 1 // SPDX-License-Identifier: GPL-2.0
2 /dts-v1/;
5 compatible = "jcore,j2-soc";
8 #address-cells = <1>;
9 #size-cells = <1>;
11 interrupt-parent = <&aic>;
14 #address-cells = <1>;
15 #size-cells = <0>;
21 clock-frequency = <50000000>;
22 d-cache-size = <8192>;
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| /linux-5.10/arch/mips/include/asm/octeon/ |
| D | cvmx-fpa.h | 7 * Copyright (c) 2003-2008 Cavium Networks
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
41 #include <asm/octeon/cvmx-address.h>
42 #include <asm/octeon/cvmx-fpa-defs.h>
56 * the (64-bit word) location in scratchpad to write
62 /* the ID of the device on the non-coherent bus */
84 /* Size of each block */
85 uint64_t size; member
86 /* The base memory address of whole block */
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| /linux-5.10/drivers/md/bcache/ |
| D | debug.c | 1 // SPDX-License-Identifier: GPL-2.0
24 #define for_each_written_bset(b, start, i) \ argument
25 for (i = (start); \
26 (void *) i < (void *) (start) + (KEY_SIZE(&b->key) << 9) &&\
27 i->seq == (start)->seq; \
28 i = (void *) i + set_blocks(i, block_bytes(b->c->cache)) * \
29 block_bytes(b->c->cache))
33 struct btree *v = b->c->verify_data; in bch_btree_verify()
37 if (!b->c->verify || !b->c->verify_ondisk) in bch_btree_verify()
40 down(&b->io_mutex); in bch_btree_verify()
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| /linux-5.10/drivers/base/ |
| D | cacheinfo.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * cacheinfo support - processor cache information via sysfs
26 #define cache_leaves(cpu) (ci_cacheinfo(cpu)->num_leaves)
27 #define per_cpu_cacheinfo(cpu) (ci_cacheinfo(cpu)->info_list)
38 return sib_leaf->fw_token == this_leaf->fw_token; in cache_leaves_are_shared()
41 /* OF properties to query for a given cache type */
50 .size_prop = "cache-size",
51 .line_size_props = { "cache-line-size",
52 "cache-block-size", },
53 .nr_sets_prop = "cache-sets",
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| /linux-5.10/drivers/mtd/ |
| D | sm_ftl.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright © 2009 - Maxim Levitsky
27 "Timeout (in ms) for cache flush (1000 ms default");
31 MODULE_PARM_DESC(debug, "Debug level (0-2)");
34 /* ------------------- sysfs attributes ---------------------------------- */
47 strncpy(buf, sm_attr->data, sm_attr->len); in sm_attr_show()
48 return sm_attr->len; in sm_attr_show()
61 vendor = kstrndup(ftl->cis_buffer + SM_CIS_VENDOR_OFFSET, in sm_create_sysfs_attributes()
62 SM_SMALL_PAGE - SM_CIS_VENDOR_OFFSET, GFP_KERNEL); in sm_create_sysfs_attributes()
72 sysfs_attr_init(&vendor_attribute->dev_attr.attr); in sm_create_sysfs_attributes()
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