cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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cpuidle-imx7ulp.c (1141B)

      1// SPDX-License-Identifier: GPL-2.0+
      2/*
      3 * Copyright (C) 2016 Freescale Semiconductor, Inc.
      4 * Copyright 2017-2018 NXP
      5 *   Anson Huang <Anson.Huang@nxp.com>
      6 */
      7
      8#include <linux/cpuidle.h>
      9#include <linux/module.h>
     10#include <asm/cpuidle.h>
     11
     12#include "common.h"
     13#include "cpuidle.h"
     14
     15static int imx7ulp_enter_wait(struct cpuidle_device *dev,
     16			    struct cpuidle_driver *drv, int index)
     17{
     18	if (index == 1)
     19		imx7ulp_set_lpm(ULP_PM_WAIT);
     20	else
     21		imx7ulp_set_lpm(ULP_PM_STOP);
     22
     23	cpu_do_idle();
     24
     25	imx7ulp_set_lpm(ULP_PM_RUN);
     26
     27	return index;
     28}
     29
     30static struct cpuidle_driver imx7ulp_cpuidle_driver = {
     31	.name = "imx7ulp_cpuidle",
     32	.owner = THIS_MODULE,
     33	.states = {
     34		/* WFI */
     35		ARM_CPUIDLE_WFI_STATE,
     36		/* WAIT */
     37		{
     38			.exit_latency = 50,
     39			.target_residency = 75,
     40			.enter = imx7ulp_enter_wait,
     41			.name = "WAIT",
     42			.desc = "PSTOP2",
     43		},
     44		/* STOP */
     45		{
     46			.exit_latency = 100,
     47			.target_residency = 150,
     48			.enter = imx7ulp_enter_wait,
     49			.name = "STOP",
     50			.desc = "PSTOP1",
     51		},
     52	},
     53	.state_count = 3,
     54	.safe_state_index = 0,
     55};
     56
     57int __init imx7ulp_cpuidle_init(void)
     58{
     59	return cpuidle_register(&imx7ulp_cpuidle_driver, NULL);
     60}