| /Linux-v5.15/Documentation/admin-guide/ |
| D | rtc.rst | 8 the local time zone or daylight savings time -- unless they dual boot
9 with MS-Windows -- but will instead be set to Coordinated Universal Time
12 The newest non-PC hardware tends to just count seconds, like the time(2)
16 Linux has two largely-compatible userspace RTC API families you may
19 * /dev/rtc ... is the RTC provided by PC compatible systems,
20 so it's not very portable to non-x86 systems.
25 Programmers need to understand that the PC/AT functionality is not
30 IRQ, so they can't all issue alarms; and where standard PC RTCs can
35 Old PC/AT-Compatible driver: /dev/rtc
36 --------------------------------------
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| /Linux-v5.15/arch/arm/boot/dts/ |
| D | sun8i-h3-orangepi-pc-plus.dts | 4 * This file is dual-licensed: you can use it either under the terms
43 /* The Orange Pi PC Plus is an extended version of the regular PC */
44 #include "sun8i-h3-orangepi-pc.dts"
47 model = "Xunlong Orange Pi PC Plus";
48 compatible = "xunlong,orangepi-pc-plus", "allwinner,sun8i-h3";
51 /* ethernet0 is the H3 emac, defined in sun8i-h3.dtsi */
57 vmmc-supply = <®_vcc3v3>;
58 bus-width = <4>;
59 non-removable;
64 * alias for it (which e.g. makes u-boot set a mac-address).
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| /Linux-v5.15/arch/arm64/include/asm/ |
| D | preempt.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
12 return READ_ONCE(current_thread_info()->preempt.count); in preempt_count()
15 static inline void preempt_count_set(u64 pc) in preempt_count_set() argument
18 WRITE_ONCE(current_thread_info()->preempt.count, pc); in preempt_count_set()
22 task_thread_info(p)->preempt_count = FORK_PREEMPT_COUNT; \
26 task_thread_info(p)->preempt_count = PREEMPT_DISABLED; \
31 current_thread_info()->preempt.need_resched = 0; in set_preempt_need_resched()
36 current_thread_info()->preempt.need_resched = 1; in clear_preempt_need_resched()
41 return !current_thread_info()->preempt.need_resched; in test_preempt_need_resched()
46 u32 pc = READ_ONCE(current_thread_info()->preempt.count); in __preempt_count_add() local
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| /Linux-v5.15/arch/m68k/q40/ |
| D | README | 6 available from this place or http://ftp.uni-erlangen.de/pub/unix/Linux/680x0/q40/
13 is not implemented - do not try it! (See below)
15 For a list of kernel command-line options read the documentation for the
22 poll the floppy for this reason - something that can't be done in Linux.
27 drivers/char/q40_keyb.c # use PC keymaps for national keyboards
28 serial.c # normal PC driver - any speed
35 floppy.c # normal PC driver, DMA emu in asm/floppy.h
44 Various other PC drivers can be enabled simply by adding them to
57 requested - SRAM must start with '%LX$' signature to do this. '-d' option
62 only the penguin - and shell prompt if it gets that far..
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| /Linux-v5.15/arch/sh/kernel/ |
| D | traps_32.c | 1 // SPDX-License-Identifier: GPL-2.0
9 * Copyright (C) 2002 - 2010 Paul Mundt
81 * - note that PC _may not_ point to the faulting instruction
83 * - return 0 if emulation okay, -EFAULT on existential error
94 rn = ®s->regs[index]; in handle_unaligned_ins()
97 rm = ®s->regs[index]; in handle_unaligned_ins()
108 ret = -EFAULT; in handle_unaligned_ins()
114 srcu += regs->regs[0]; in handle_unaligned_ins()
119 dst += 4-count; in handle_unaligned_ins()
121 if (ma->from(dst, srcu, count)) in handle_unaligned_ins()
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| D | traps.c | 1 // SPDX-License-Identifier: GPL-2.0
37 printk("Process: %s (pid: %d, stack limit = %p)\n", current->comm, in die()
41 dump_mem("Stack: ", KERN_DEFAULT, regs->regs[15], in die()
71 * - userspace errors just cause EFAULT to be returned, resulting in SEGV
72 * - kernel/userspace interfaces cause a jump to an appropriate handler
73 * - other kernel errors are bad
79 fixup = search_exception_tables(regs->pc); in die_if_no_fixup()
81 regs->pc = fixup->fixup; in die_if_no_fixup()
93 unsigned long bugaddr = regs->pc; in handle_BUG()
102 if (bug->flags & BUGFLAG_UNWINDER) in handle_BUG()
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| /Linux-v5.15/drivers/net/wireless/intersil/hostap/ |
| D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
39 support cards that don't have firmware in flash, such as D-Link
40 DWL-520 rev E and D-Link DWL-650 rev P.
46 bool "Support for non-volatile firmware download"
49 Allow Host AP driver to write firmware images to the non-volatile
61 Host AP driver's version for Prism2/2.5/3 PC Cards in PLX9052 based
85 tristate "Host AP driver for Prism2/2.5/3 PC Cards"
88 Host AP driver's version for Prism2/2.5/3 PC Cards.
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| /Linux-v5.15/include/linux/ |
| D | posix-clock.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * posix-clock.h - support for dynamic clock devices
13 #include <linux/posix-timers.h>
19 * struct posix_clock_operations - functional interface to the clock
41 int (*clock_adjtime)(struct posix_clock *pc, struct __kernel_timex *tx);
43 int (*clock_gettime)(struct posix_clock *pc, struct timespec64 *ts);
45 int (*clock_getres) (struct posix_clock *pc, struct timespec64 *ts);
47 int (*clock_settime)(struct posix_clock *pc,
53 long (*ioctl) (struct posix_clock *pc,
56 int (*open) (struct posix_clock *pc, fmode_t f_mode);
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| /Linux-v5.15/include/uapi/linux/ |
| D | perf_event.h | 1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
5 * Copyright (C) 2008-2009, Thomas Gleixner <tglx@linutronix.de>
6 * Copyright (C) 2008-2011, Red Hat, Inc., Ingo Molnar
7 * Copyright (C) 2008-2011, Red Hat, Inc., Peter Zijlstra
13 * For licencing details see kernel-base/COPYING
23 * User-space ABI bits:
37 PERF_TYPE_MAX, /* non-ABI */
75 PERF_COUNT_HW_MAX, /* non-ABI */
81 * { L1-D, L1-I, LLC, ITLB, DTLB, BPU, NODE } x
94 PERF_COUNT_HW_CACHE_MAX, /* non-ABI */
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| /Linux-v5.15/tools/include/uapi/linux/ |
| D | perf_event.h | 1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
5 * Copyright (C) 2008-2009, Thomas Gleixner <tglx@linutronix.de>
6 * Copyright (C) 2008-2011, Red Hat, Inc., Ingo Molnar
7 * Copyright (C) 2008-2011, Red Hat, Inc., Peter Zijlstra
13 * For licencing details see kernel-base/COPYING
23 * User-space ABI bits:
37 PERF_TYPE_MAX, /* non-ABI */
75 PERF_COUNT_HW_MAX, /* non-ABI */
81 * { L1-D, L1-I, LLC, ITLB, DTLB, BPU, NODE } x
94 PERF_COUNT_HW_CACHE_MAX, /* non-ABI */
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| /Linux-v5.15/arch/arm/boot/compressed/ |
| D | head.S | 1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Copyright (C) 1996-2002 Russell King
12 #include "efi-header.S"
20 AR_CLASS( .arch armv7-a )
21 M_CLASS( .arch armv7-m )
105 kputc #'-'
109 kputc #'-'
114 kputc #'-'
158 * in little-endian form.
212 AR_CLASS( sub pc, pc, #3 ) @ A/R: switch to Thumb2 mode
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| /Linux-v5.15/fs/udf/ |
| D | symlink.c | 5 * Symlink handling routines for the OSTA-UDF(tm) filesystem.
13 * (C) 1998-2001 Ben Fennema
35 struct pathComponent *pc; in udf_pc_to_char() local
41 tolen--; in udf_pc_to_char()
43 pc = (struct pathComponent *)(from + elen); in udf_pc_to_char()
45 switch (pc->componentType) { in udf_pc_to_char()
51 if (pc->lengthComponentIdent > 0) { in udf_pc_to_char()
52 elen += pc->lengthComponentIdent; in udf_pc_to_char()
58 return -ENAMETOOLONG; in udf_pc_to_char()
61 tolen--; in udf_pc_to_char()
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| /Linux-v5.15/arch/m68k/kernel/ |
| D | head.S | 1 /* -*- mode: asm -*-
3 ** head.S -- This file contains the initial boot code for the
19 ** ++ Bjoern & Roman: ATARI-68040 support for the Medusa
22 ** Magnum- and FX-alternate ram
25 ** for linux-2.1.115
53 * 1) Remove register dependency through-out the file.
61 * write-ups on the structure of the file, and the features of the
65 * ------------------
74 * actual per-machine specific code very simple.
77 * (the same for all machines) and mapping machine-specific I/O
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| /Linux-v5.15/arch/m68k/ifpsp060/src/ |
| D | ftest.S | 3 M68000 Hi-Performance Microprocessor Division
5 Production Release P1.00 -- October 10, 1994
30 set SREGS, -64
31 set IREGS, -128
32 set IFPREGS, -224
33 set SFPREGS, -320
34 set IFPCREGS, -332
35 set SFPCREGS, -344
36 set ICCR, -346
37 set SCCR, -348
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| /Linux-v5.15/tools/lib/perf/ |
| D | mmap.c | 1 // SPDX-License-Identifier: GPL-2.0
21 map->fd = -1; in perf_mmap__init()
22 map->overwrite = overwrite; in perf_mmap__init()
23 map->unmap_cb = unmap_cb; in perf_mmap__init()
24 refcount_set(&map->refcnt, 0); in perf_mmap__init()
26 prev->next = map; in perf_mmap__init()
31 return map->mask + 1 + page_size; in perf_mmap__mmap_len()
37 map->prev = 0; in perf_mmap__mmap()
38 map->mask = mp->mask; in perf_mmap__mmap()
39 map->base = mmap(NULL, perf_mmap__mmap_len(map), mp->prot, in perf_mmap__mmap()
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| /Linux-v5.15/arch/arm64/boot/dts/rockchip/ |
| D | rk3399-roc-pc-mezzanine.dts | 1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
3 * Copyright (c) 2017 T-Chip Intelligent Technology Co., Ltd
7 /dts-v1/;
8 #include "rk3399-roc-pc.dtsi"
11 model = "Firefly ROC-RK3399-PC Mezzanine Board";
12 compatible = "firefly,roc-rk3399-pc-mezzanine", "rockchip,rk3399";
19 poe_12v: poe-12v {
20 compatible = "regulator-fixed";
21 regulator-name = "poe_12v";
22 regulator-always-on;
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| /Linux-v5.15/arch/arm/kernel/ |
| D | entry-armv.S | 1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * linux/arch/arm/kernel/entry-armv.S
6 * ARM700 fix by Matthew Godbolt (linux-user@willothewisp.demon.co.uk)
9 * Low-level vector interface routines
19 #include <asm/glue-df.h>
20 #include <asm/glue-pf.h>
23 #include <mach/entry-macro.S>
30 #include <asm/uaccess-asm.h>
32 #include "entry-header.S"
33 #include <asm/entry-macro-multi.S>
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| /Linux-v5.15/arch/arm/nwfpe/ |
| D | entry.S | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
23 strb r8, [r10, #TSK_USED_MATH] @ set current->used_math
26 ldr pc, [r4] @ Call FP emulator entry point
55 until it encounters a non floating point instruction, at which time it
63 #include <asm/asm-offsets.h>
67 mov r4, lr @ save the failure-return addresses
70 ldr r5, [sp, #S_PC] @ get contents of PC;
88 @ increment PC
96 str r5, [sp, #S_PC] @ update PC copy in regs
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| /Linux-v5.15/arch/m68k/ifpsp060/ |
| D | CHANGES | 3 M68000 Hi-Performance Microprocessor Division
5 Production Release P1.00 -- October 10, 1994
31 ---------------------------
42 mode was pre-decrement or post-increment and the address register
49 ---------
56 -------
66 ----
70 ------
71 Upon receiving a non-zero (failing) return value from
72 a {i,d}mem_{read,write}_{byte,word,long}() "call-out",
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| /Linux-v5.15/drivers/net/ethernet/mellanox/mlx5/core/en/ |
| D | xdp.c | 14 * - Redistributions of source code must retain the above
18 * - Redistributions in binary form must reproduce the above
47 * max_mtu = PAGE_SIZE - S - hr - hard_mtu (2) in mlx5e_xdp_max_mtu()
49 * SKB_DATA_ALIGN(PAGE_SIZE - S) + S, which is equal to PAGE_SIZE, in mlx5e_xdp_max_mtu()
71 xdptxd.data = xdpf->data; in mlx5e_xmit_xdp_buff()
72 xdptxd.len = xdpf->len; in mlx5e_xmit_xdp_buff()
74 if (xdp->rxq->mem.type == MEM_TYPE_XSK_BUFF_POOL) { in mlx5e_xmit_xdp_buff()
85 __set_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags); /* non-atomic */ in mlx5e_xmit_xdp_buff()
89 dma_addr = dma_map_single(sq->pdev, xdptxd.data, xdptxd.len, in mlx5e_xmit_xdp_buff()
91 if (dma_mapping_error(sq->pdev, dma_addr)) { in mlx5e_xmit_xdp_buff()
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| /Linux-v5.15/arch/sparc/kernel/ |
| D | entry.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
15 void do_illegal_instruction(struct pt_regs *regs, unsigned long pc,
18 void do_priv_instruction(struct pt_regs *regs, unsigned long pc,
20 void do_memaccess_unaligned(struct pt_regs *regs, unsigned long pc,
22 void do_fpd_trap(struct pt_regs *regs, unsigned long pc,
24 void do_fpe_trap(struct pt_regs *regs, unsigned long pc,
26 void handle_tag_overflow(struct pt_regs *regs, unsigned long pc,
28 void handle_watchpoint(struct pt_regs *regs, unsigned long pc,
30 void handle_reg_access(struct pt_regs *regs, unsigned long pc,
32 void handle_cp_disabled(struct pt_regs *regs, unsigned long pc,
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| D | sun4v_ivec.S | 1 /* SPDX-License-Identifier: GPL-2.0 */
48 /* Now get the cross-call arguments and handler PC, same
51 * 1st 64-bit word: low half is 32-bit PC, put into %g3 and jmpl to it
53 * 2nd 64-bit word: 64-bit arg, load into %g1
54 * 3rd 64-bit word: 64-bit arg, load into %g7
63 add %g2, 0x40 - 0x8 - 0x8, %g2
100 /* XXX There can be a full 64-byte block of data here.
103 * XXX need to add a 64-byte storage area in the struct ino_bucket
157 /* If the first word is non-zero, queue is full. */
167 /* Copy 64-byte queue entry into kernel buffer. */
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| /Linux-v5.15/drivers/net/can/usb/peak_usb/ |
| D | pcan_usb_fd.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * CAN driver for PEAK System PCAN-USB FD / PCAN-USB Pro FD adapter
5 * Copyright (C) 2013-2014 Stephane Grosjean <s.grosjean@peak-system.com>
23 /* PCAN-USB Pro FD adapter internal clock (Hz) */
29 /* PCAN-USB Pro FD command timeout (ms.) */
32 /* PCAN-USB Pro FD rx/tx buffers size */
66 /* Extended USB commands (non uCAN commands) */
103 /* Extended usage of uCAN commands CMD_xxx_xx_OPTION for PCAN-USB Pro FD */
114 /* Extended usage of uCAN messages for PCAN-USB Pro FD */
128 #define PCAN_UFD_OVMSG_CHANNEL(o) ((o)->channel & 0xf)
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| /Linux-v5.15/arch/m68k/fpsp040/ |
| D | x_fline.S | 4 | fpsp_fline --- FPSP handler for fline exception
8 | Next, determine if the instruction is an fmovecr with a non-zero
10 | must be a real F-line exception.
34 | check for unimplemented vector first. Use EXC_VEC-4 because
38 cmpw #UNIMP_VEC,EXC_VEC-4(%a7)
42 | fmovecr with non-zero <ea> handling here
44 subl #4,%a7 |4 accounts for 2-word difference
47 link %a6,#-LOCAL_SIZE
48 fsave -(%a7)
49 moveml %d0-%d1/%a0-%a1,USER_DA(%a6)
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| /Linux-v5.15/arch/arm64/kernel/ |
| D | alternative.c | 1 // SPDX-License-Identifier: GPL-2.0-only
20 #define __ALT_PTR(a, f) ((void *)&(a)->f + (a)->f)
43 * Check if the target PC is within an alternative block.
45 static bool branch_insn_requires_update(struct alt_instr *alt, unsigned long pc) in branch_insn_requires_update() argument
48 return !(pc >= replptr && pc <= (replptr + alt->alt_len)); in branch_insn_requires_update()
51 #define align_down(x, a) ((unsigned long)(x) & ~(((unsigned long)(a)) - 1))
71 offset = target - (unsigned long)insnptr; in get_alt_insn()
79 * If we're replacing an adrp instruction, which uses PC-relative in get_alt_insn()
81 * PC. adrp operates on 4K aligned addresses. in get_alt_insn()
85 new_offset = target - align_down(insnptr, SZ_4K); in get_alt_insn()
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