| /kernel/linux/linux-4.19/kernel/time/ |
| D | tick-common.c | 2 * linux/kernel/time/tick-common.c
4 * This file contains the base functions to manage periodic tick
7 * Copyright(C) 2005-2006, Thomas Gleixner <tglx@linutronix.de>
8 * Copyright(C) 2005-2007, Red Hat, Inc., Ingo Molnar
9 * Copyright(C) 2006-2007, Timesys Corp., Thomas Gleixner
12 * kernel-base/COPYING.
26 #include "tick-internal.h"
29 * Tick devices
33 * Tick next event: keeps track of the tick time
47 * 2) Hand off the duty in the NOHZ idle case by setting the value to
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| D | clocksource.c | 13 * This program is distributed in the hope that it will be useful,
33 #include <linux/tick.h>
36 #include "tick-internal.h"
40 * clocks_calc_mult_shift - calculate mult/shift factors for scaled math of clocks
45 * @maxsec: guaranteed runtime conversion range in seconds
50 * @to and @from are frequency values in HZ. For clock sources @to is
54 * The @maxsec conversion range argument controls the time frame in
56 * calculated mult and shift factors. This guarantees that no 64bit
75 sftacc--; in clocks_calc_mult_shift()
82 for (sft = 32; sft > 0; sft--) { in clocks_calc_mult_shift()
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| /kernel/linux/linux-5.10/kernel/time/ |
| D | tick-common.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * This file contains the base functions to manage periodic tick
6 * Copyright(C) 2005-2006, Thomas Gleixner <tglx@linutronix.de>
7 * Copyright(C) 2005-2007, Red Hat, Inc., Ingo Molnar
8 * Copyright(C) 2006-2007, Timesys Corp., Thomas Gleixner
23 #include "tick-internal.h"
26 * Tick devices
30 * Tick next event: keeps track of the tick time
44 * 2) Hand off the duty in the NOHZ idle case by setting the value to
56 static int tick_do_timer_boot_cpu __read_mostly = -1;
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| D | clocksource.c | 1 // SPDX-License-Identifier: GPL-2.0+
15 #include <linux/tick.h>
18 #include "tick-internal.h"
22 * clocks_calc_mult_shift - calculate mult/shift factors for scaled math of clocks
27 * @maxsec: guaranteed runtime conversion range in seconds
32 * @to and @from are frequency values in HZ. For clock sources @to is
36 * The @maxsec conversion range argument controls the time frame in
38 * calculated mult and shift factors. This guarantees that no 64bit
57 sftacc--; in clocks_calc_mult_shift()
64 for (sft = 32; sft > 0; sft--) { in clocks_calc_mult_shift()
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| D | timekeeping.c | 1 // SPDX-License-Identifier: GPL-2.0
4 * timer.c, moved in commit 8524070b7982.
20 #include <linux/tick.h>
26 #include "tick-internal.h"
35 /* Update timekeeper when a tick has passed */
61 * struct tk_fast - NMI safe timekeeper
74 /* Suspend-time cycles value for halted fast timekeeper. */
91 * returns nanoseconds already so no conversion is required, hence mult=1
117 while (tk->tkr_mono.xtime_nsec >= ((u64)NSEC_PER_SEC << tk->tkr_mono.shift)) { in tk_normalize_xtime()
118 tk->tkr_mono.xtime_nsec -= (u64)NSEC_PER_SEC << tk->tkr_mono.shift; in tk_normalize_xtime()
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| /kernel/linux/linux-4.19/drivers/firmware/ |
| D | psci_checker.c | 6 * This program is distributed in the hope that it will be useful,
28 #include <linux/tick.h>
38 static int tos_resident_cpu = -1;
49 * "enable-method" property of each CPU in the DT, but given that there is no
50 * arch-specific way to check this, we assume that the DT is sensible.
54 int migrate_type = -1; in psci_ops_check()
59 return -EOPNOTSUPP; in psci_ops_check()
73 if (tos_resident_cpu == -1) in psci_ops_check()
74 pr_warn("UP Trusted OS resides on no online CPU\n"); in psci_ops_check()
92 /* Try to power down all CPUs in the mask. */ in down_and_up_cpus()
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| /kernel/linux/linux-5.10/drivers/firmware/psci/ |
| D | psci_checker.c | 1 // SPDX-License-Identifier: GPL-2.0-only
21 #include <linux/tick.h>
31 static int tos_resident_cpu = -1;
42 * "enable-method" property of each CPU in the DT, but given that there is no
43 * arch-specific way to check this, we assume that the DT is sensible.
47 int migrate_type = -1; in psci_ops_check()
52 return -EOPNOTSUPP; in psci_ops_check()
66 if (tos_resident_cpu == -1) in psci_ops_check()
67 pr_warn("UP Trusted OS resides on no online CPU\n"); in psci_ops_check()
85 /* Try to power down all CPUs in the mask. */ in down_and_up_cpus()
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/timer/ |
| D | arm,arch_timer.yaml | 1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Marc Zyngier <marc.zyngier@arm.com>
11 - Mark Rutland <mark.rutland@arm.com>
13 ARM cores may have a per-core architected timer, which provides per-cpu timers,
17 The per-core architected timer is attached to a GIC to deliver its
18 per-processor interrupts via PPIs. The memory mapped timer is attached to a GIC
24 - items:
25 - enum:
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| D | arm,arch_timer_mmio.yaml | 1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Marc Zyngier <marc.zyngier@arm.com>
11 - Mark Rutland <mark.rutland@arm.com>
22 - enum:
23 - arm,armv7-timer-mem
29 '#address-cells':
32 '#size-cells':
37 clock-frequency:
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| /kernel/linux/linux-5.10/drivers/cpuidle/ |
| D | cpuidle.c | 2 * cpuidle.c - core cpuidle infrastructure
4 * (C) 2006-2007 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
23 #include <linux/suspend.h>
24 #include <linux/tick.h>
52 return off || !initialized || !drv || !dev || !dev->enabled; in cpuidle_not_available()
56 * cpuidle_play_dead - cpu off-lining
58 * Returns in case of an error or no driver
67 return -ENODEV; in cpuidle_play_dead()
69 /* Find lowest-power state that supports long-term idle */ in cpuidle_play_dead()
70 for (i = drv->state_count - 1; i >= 0; i--) in cpuidle_play_dead()
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| /kernel/linux/linux-4.19/Documentation/devicetree/bindings/timer/ |
| D | arm,arch_timer.txt | 3 ARM cores may have a per-core architected timer, which provides per-cpu timers,
7 The per-core architected timer is attached to a GIC to deliver its
8 per-processor interrupts via PPIs. The memory mapped timer is attached to a GIC
13 - compatible : Should at least contain one of
14 "arm,armv7-timer"
15 "arm,armv8-timer"
17 - interrupts : Interrupt list for secure, non-secure, virtual and
18 hypervisor timers, in that order.
20 - clock-frequency : The frequency of the main counter, in Hz. Should be present
25 - always-on : a boolean property. If present, the timer is powered through an
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| /kernel/linux/linux-4.19/kernel/sched/ |
| D | idle.c | 6 * tasks which are handled in sched/fair.c )
16 * sched_idle_set_state - Record idle state for the current CPU.
31 cpu_idle_force_poll--; in cpu_idle_poll_ctrl()
83 * default_idle_call - Default CPU idle routine.
103 * update no idle residency and return. in call_cpuidle()
106 dev->last_residency = 0; in call_cpuidle()
108 return -EBUSY; in call_cpuidle()
114 * care of re-enabling the local interrupts in call_cpuidle()
120 * cpuidle_idle_call - the main idle function
122 * NOTE: no locks or semaphores should be used here
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| /kernel/linux/linux-5.10/kernel/sched/ |
| D | idle.c | 1 // SPDX-License-Identifier: GPL-2.0-only
7 * tasks which are handled in sched/fair.c )
17 * sched_idle_set_state - Record idle state for the current CPU.
32 cpu_idle_force_poll--; in cpu_idle_poll_ctrl()
85 * default_idle_call - Default CPU idle routine.
105 * last -- this is very similar to the entry code. in default_idle_call()
135 return -EBUSY; in call_cpuidle_s2idle()
145 * update no idle residency and return. in call_cpuidle()
148 dev->last_residency_ns = 0; in call_cpuidle()
150 return -EBUSY; in call_cpuidle()
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| /kernel/linux/linux-5.10/arch/arm/mach-exynos/ |
| D | suspend.c | 1 // SPDX-License-Identifier: GPL-2.0
3 // Copyright (c) 2011-2014 Samsung Electronics Co., Ltd.
6 // Exynos - Suspend support
8 // Based on arch/arm/mach-s3c2410/pm.c
13 #include <linux/suspend.h>
23 #include <linux/soc/samsung/exynos-pmu.h>
24 #include <linux/soc/samsung/exynos-regs-pmu.h>
27 #include <asm/hardware/cache-l2x0.h>
31 #include <asm/suspend.h>
36 #define REG_TABLE_END (-1U)
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| /kernel/linux/linux-4.19/include/linux/ |
| D | timekeeper_internal.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
15 * struct tk_read_base - base structure for timekeeping readout
46 * struct timekeeper - Structure holding internal timekeeping values.
49 * @xtime_sec: Current CLOCK_REALTIME time in seconds
50 * @ktime_sec: Current CLOCK_MONOTONIC time in seconds
52 * @offs_real: Offset clock monotonic -> clock realtime
53 * @offs_boot: Offset clock monotonic -> clock boottime
54 * @offs_tai: Offset clock monotonic -> clock tai
55 * @tai_offset: The current UTC to TAI offset in seconds
58 * @next_leap_ktime: CLOCK_MONOTONIC time value of a pending leap-second
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| /kernel/linux/linux-4.19/arch/arm/mach-exynos/ |
| D | suspend.c | 1 // SPDX-License-Identifier: GPL-2.0
3 // Copyright (c) 2011-2014 Samsung Electronics Co., Ltd.
6 // EXYNOS - Suspend support
8 // Based on arch/arm/mach-s3c2410/pm.c
13 #include <linux/suspend.h>
23 #include <linux/soc/samsung/exynos-pmu.h>
24 #include <linux/soc/samsung/exynos-regs-pmu.h>
27 #include <asm/hardware/cache-l2x0.h>
31 #include <asm/suspend.h>
33 #include <plat/pm-common.h>
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| /kernel/linux/linux-4.19/drivers/cpuidle/ |
| D | cpuidle.c | 2 * cpuidle.c - core cpuidle infrastructure
4 * (C) 2006-2007 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
23 #include <linux/suspend.h>
24 #include <linux/tick.h>
51 return off || !initialized || !drv || !dev || !dev->enabled; in cpuidle_not_available()
55 * cpuidle_play_dead - cpu off-lining
57 * Returns in case of an error or no driver
66 return -ENODEV; in cpuidle_play_dead()
68 /* Find lowest-power state that supports long-term idle */ in cpuidle_play_dead()
69 for (i = drv->state_count - 1; i >= 0; i--) in cpuidle_play_dead()
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| /kernel/linux/linux-5.10/include/linux/ |
| D | timekeeper_internal.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
15 * struct tk_read_base - base structure for timekeeping readout
46 * struct timekeeper - Structure holding internal timekeeping values.
49 * @xtime_sec: Current CLOCK_REALTIME time in seconds
50 * @ktime_sec: Current CLOCK_MONOTONIC time in seconds
52 * @offs_real: Offset clock monotonic -> clock realtime
53 * @offs_boot: Offset clock monotonic -> clock boottime
54 * @offs_tai: Offset clock monotonic -> clock tai
55 * @tai_offset: The current UTC to TAI offset in seconds
58 * @next_leap_ktime: CLOCK_MONOTONIC time value of a pending leap-second
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| /kernel/linux/linux-4.19/Documentation/timers/ |
| D | highres.txt | 2 -----------------------------------------------------
4 Further information can be found in the paper of the OLS 2006 talk "hrtimers
7 https://www.kernel.org/doc/ols/2006/ols2006v1-pages-333-346.pdf
10 http://www.cs.columbia.edu/~nahum/w6998/papers/ols2006-hrtimers-slides.pdf
13 changes in the time(r) related Linux subsystems. Figure #1 (p. 2) shows the
18 switched to the name "clock event devices" in meantime.
22 - hrtimer base infrastructure
23 - timeofday and clock source management
24 - clock event management
25 - high resolution timer functionality
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| /kernel/linux/linux-5.10/Documentation/timers/ |
| D | highres.rst | 5 Further information can be found in the paper of the OLS 2006 talk "hrtimers
8 https://www.kernel.org/doc/ols/2006/ols2006v1-pages-333-346.pdf
11 http://www.cs.columbia.edu/~nahum/w6998/papers/ols2006-hrtimers-slides.pdf
14 changes in the time(r) related Linux subsystems. Figure #1 (p. 2) shows the
19 switched to the name "clock event devices" in meantime.
23 - hrtimer base infrastructure
24 - timeofday and clock source management
25 - clock event management
26 - high resolution timer functionality
27 - dynamic ticks
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| /kernel/linux/linux-5.10/drivers/net/ipa/ |
| D | ipa_endpoint.c | 1 // SPDX-License-Identifier: GPL-2.0
3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
4 * Copyright (C) 2019-2020 Linaro Ltd.
12 #include <linux/dma-direction.h>
26 #define atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0)
30 /* RX buffer is 1 page (or a power-of-2 contiguous pages) */
34 #define IPA_RX_BUFFER_OVERHEAD (PAGE_SIZE - SKB_MAX_ORDER(NET_SKB_PAD, 0))
36 /* Where to find the QMAP mux_id for a packet within modem-supplied metadata */
42 /** enum ipa_status_opcode - status element opcode hardware values */
50 /** enum ipa_status_exception - status element exception type */
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| /kernel/linux/linux-5.10/arch/mips/alchemy/devboards/ |
| D | pm.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * Alchemy Development Board example suspend userspace interface.
10 #include <linux/suspend.h>
12 #include <asm/mach-au1x00/au1000.h>
13 #include <asm/mach-au1x00/gpio-au1000.h>
14 #include <asm/mach-db1x00/bcsr.h>
17 * Generic suspend userspace interface for Alchemy development boards.
19 * can be used by userspace to en/disable all au1x-provided wakeup
54 /* setup 1Hz-timer-based wakeup: wait for reg access */ in db1x_pm_enter()
91 printk(KERN_ERR "db1x: no wakeup source activated!\n"); in db1x_pm_begin()
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| /kernel/linux/linux-4.19/arch/mips/alchemy/devboards/ |
| D | pm.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * Alchemy Development Board example suspend userspace interface.
10 #include <linux/suspend.h>
12 #include <asm/mach-au1x00/au1000.h>
13 #include <asm/mach-au1x00/gpio-au1000.h>
14 #include <asm/mach-db1x00/bcsr.h>
17 * Generic suspend userspace interface for Alchemy development boards.
19 * can be used by userspace to en/disable all au1x-provided wakeup
54 /* setup 1Hz-timer-based wakeup: wait for reg access */ in db1x_pm_enter()
91 printk(KERN_ERR "db1x: no wakeup source activated!\n"); in db1x_pm_begin()
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| /kernel/linux/linux-5.10/drivers/clocksource/ |
| D | timer-atlas7.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
81 ce->event_handler(ce); in sirfsoc_timer_interrupt()
86 /* read 64-bit timer counter */
113 /* enable the tick */ in sirfsoc_timer_set_next_event()
119 /* Oneshot is enabled in set_next_event */
138 for (i = 0; i < SIRFSOC_TIMER_REG_CNT - 2; i++) in sirfsoc_clocksource_resume()
141 writel_relaxed(sirfsoc_timer_reg_val[SIRFSOC_TIMER_REG_CNT - 2], in sirfsoc_clocksource_resume()
143 writel_relaxed(sirfsoc_timer_reg_val[SIRFSOC_TIMER_REG_CNT - 1], in sirfsoc_clocksource_resume()
158 .suspend = sirfsoc_clocksource_suspend,
178 ce->irq = irq; in sirfsoc_local_timer_starting_cpu()
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| /kernel/linux/linux-4.19/drivers/clocksource/ |
| D | timer-atlas7.c | 82 ce->event_handler(ce); in sirfsoc_timer_interrupt()
87 /* read 64-bit timer counter */
114 /* enable the tick */ in sirfsoc_timer_set_next_event()
120 /* Oneshot is enabled in set_next_event */
139 for (i = 0; i < SIRFSOC_TIMER_REG_CNT - 2; i++) in sirfsoc_clocksource_resume()
142 writel_relaxed(sirfsoc_timer_reg_val[SIRFSOC_TIMER_REG_CNT - 2], in sirfsoc_clocksource_resume()
144 writel_relaxed(sirfsoc_timer_reg_val[SIRFSOC_TIMER_REG_CNT - 1], in sirfsoc_clocksource_resume()
159 .suspend = sirfsoc_clocksource_suspend,
185 ce->irq = action->irq; in sirfsoc_local_timer_starting_cpu()
186 ce->name = "local_timer"; in sirfsoc_local_timer_starting_cpu()
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