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path: root/include/soc/arc/timers.h
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/*
 * Copyright (C) 2016-17 Synopsys, Inc. (www.synopsys.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef __SOC_ARC_TIMERS_H
#define __SOC_ARC_TIMERS_H

#include <soc/arc/aux.h>

/* Timer related Aux registers */
#define ARC_REG_TIMER0_LIMIT	0x23	/* timer 0 limit */
#define ARC_REG_TIMER0_CTRL	0x22	/* timer 0 control */
#define ARC_REG_TIMER0_CNT	0x21	/* timer 0 count */
#define ARC_REG_TIMER1_LIMIT	0x102	/* timer 1 limit */
#define ARC_REG_TIMER1_CTRL	0x101	/* timer 1 control */
#define ARC_REG_TIMER1_CNT	0x100	/* timer 1 count */

/* CTRL reg bits */
#define TIMER_CTRL_IE	        (1 << 0) /* Interrupt when Count reaches limit */
#define TIMER_CTRL_NH	        (1 << 1) /* Count only when CPU NOT halted */

#define ARC_TIMERN_MAX		0xFFFFFFFF

#define ARC_REG_TIMERS_BCR	0x75

struct bcr_timer {
#ifdef CONFIG_CPU_BIG_ENDIAN
	unsigned int pad2:15, rtsc:1, pad1:5, rtc:1, t1:1, t0:1, ver:8;
#else
	unsigned int ver:8, t0:1, t1:1, rtc:1, pad1:5, rtsc:1, pad2:15;
#endif
};

#endif
f27938ef365244d3c41084 (diff)
PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies
In a struct pcie_link_state, link->root points to the pcie_link_state of the root of the PCIe hierarchy. For the topmost link, this points to itself (link->root = link). For others, we copy the pointer from the parent (link->root = link->parent->root). Previously we recognized that Root Ports originated PCIe hierarchies, but we treated PCI/PCI-X to PCIe Bridges as being in the middle of the hierarchy, and when we tried to copy the pointer from link->parent->root, there was no parent, and we dereferenced a NULL pointer: BUG: unable to handle kernel NULL pointer dereference at 0000000000000090 IP: [<ffffffff9e424350>] pcie_aspm_init_link_state+0x170/0x820 Recognize that PCI/PCI-X to PCIe Bridges originate PCIe hierarchies just like Root Ports do, so link->root for these devices should also point to itself. Fixes: 51ebfc92b72b ("PCI: Enumerate switches below PCI-to-PCIe bridges") Link: https://bugzilla.kernel.org/show_bug.cgi?id=193411 Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1022181 Tested-by: lists@ssl-mail.com Tested-by: Jayachandran C. <jnair@caviumnetworks.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v4.2+
Diffstat (limited to 'include/dt-bindings/clock/jz4780-cgu.h')