cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

irq.c (2014B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Copyright (C) 2011 Google, Inc.
      4 *
      5 * Author:
      6 *	Colin Cross <ccross@android.com>
      7 *
      8 * Copyright (C) 2010,2013, NVIDIA Corporation
      9 */
     10
     11#include <linux/cpu_pm.h>
     12#include <linux/interrupt.h>
     13#include <linux/io.h>
     14#include <linux/irqchip/arm-gic.h>
     15#include <linux/irq.h>
     16#include <linux/kernel.h>
     17#include <linux/of_address.h>
     18#include <linux/of.h>
     19#include <linux/syscore_ops.h>
     20
     21#include <soc/tegra/irq.h>
     22
     23#include "board.h"
     24#include "iomap.h"
     25
     26#define SGI_MASK 0xFFFF
     27
     28#ifdef CONFIG_PM_SLEEP
     29static void __iomem *tegra_gic_cpu_base;
     30#endif
     31
     32bool tegra_pending_sgi(void)
     33{
     34	u32 pending_set;
     35	void __iomem *distbase = IO_ADDRESS(TEGRA_ARM_INT_DIST_BASE);
     36
     37	pending_set = readl_relaxed(distbase + GIC_DIST_PENDING_SET);
     38
     39	if (pending_set & SGI_MASK)
     40		return true;
     41
     42	return false;
     43}
     44
     45#ifdef CONFIG_PM_SLEEP
     46static int tegra_gic_notifier(struct notifier_block *self,
     47			      unsigned long cmd, void *v)
     48{
     49	switch (cmd) {
     50	case CPU_PM_ENTER:
     51		writel_relaxed(0x1E0, tegra_gic_cpu_base + GIC_CPU_CTRL);
     52		break;
     53	}
     54
     55	return NOTIFY_OK;
     56}
     57
     58static struct notifier_block tegra_gic_notifier_block = {
     59	.notifier_call = tegra_gic_notifier,
     60};
     61
     62static const struct of_device_id tegra114_dt_gic_match[] __initconst = {
     63	{ .compatible = "arm,cortex-a15-gic" },
     64	{ }
     65};
     66
     67static void __init tegra114_gic_cpu_pm_registration(void)
     68{
     69	struct device_node *dn;
     70
     71	dn = of_find_matching_node(NULL, tegra114_dt_gic_match);
     72	if (!dn)
     73		return;
     74
     75	tegra_gic_cpu_base = of_iomap(dn, 1);
     76
     77	cpu_pm_register_notifier(&tegra_gic_notifier_block);
     78}
     79#else
     80static void __init tegra114_gic_cpu_pm_registration(void) { }
     81#endif
     82
     83static const struct of_device_id tegra_ictlr_match[] __initconst = {
     84	{ .compatible = "nvidia,tegra20-ictlr" },
     85	{ .compatible = "nvidia,tegra30-ictlr" },
     86	{ }
     87};
     88
     89void __init tegra_init_irq(void)
     90{
     91	if (WARN_ON(!of_find_matching_node(NULL, tegra_ictlr_match)))
     92		pr_warn("Outdated DT detected, suspend/resume will NOT work\n");
     93
     94	tegra114_gic_cpu_pm_registration();
     95}