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-imx6sl.c (1082B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Copyright (C) 2014 Freescale Semiconductor, Inc.
      4 */
      5
      6#include <linux/clk/imx.h>
      7#include <linux/cpuidle.h>
      8#include <linux/module.h>
      9#include <asm/cpuidle.h>
     10
     11#include "common.h"
     12#include "cpuidle.h"
     13
     14static int imx6sl_enter_wait(struct cpuidle_device *dev,
     15			    struct cpuidle_driver *drv, int index)
     16{
     17	imx6_set_lpm(WAIT_UNCLOCKED);
     18	/*
     19	 * Software workaround for ERR005311, see function
     20	 * description for details.
     21	 */
     22	imx6sl_set_wait_clk(true);
     23	cpu_do_idle();
     24	imx6sl_set_wait_clk(false);
     25	imx6_set_lpm(WAIT_CLOCKED);
     26
     27	return index;
     28}
     29
     30static struct cpuidle_driver imx6sl_cpuidle_driver = {
     31	.name = "imx6sl_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			.flags = CPUIDLE_FLAG_TIMER_STOP,
     41			.enter = imx6sl_enter_wait,
     42			.name = "WAIT",
     43			.desc = "Clock off",
     44		},
     45	},
     46	.state_count = 2,
     47	.safe_state_index = 0,
     48};
     49
     50int __init imx6sl_cpuidle_init(void)
     51{
     52	return cpuidle_register(&imx6sl_cpuidle_driver, NULL);
     53}