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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pm.h (2075B)

      1/*
      2 * TI DaVinci platform support for power management.
      3 *
      4 * Copyright (C) 2009 Texas Instruments, Inc. https://www.ti.com/
      5 *
      6 * This program is free software; you can redistribute it and/or
      7 * modify it under the terms of the GNU General Public License as
      8 * published by the Free Software Foundation version 2.
      9 *
     10 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
     11 * kind, whether express or implied; without even the implied warranty
     12 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     13 * GNU General Public License for more details.
     14 */
     15#ifndef _MACH_DAVINCI_PM_H
     16#define _MACH_DAVINCI_PM_H
     17
     18/*
     19 * Caution: Assembly code in sleep.S makes assumtion on the order
     20 * of the members of this structure.
     21 */
     22struct davinci_pm_config {
     23	void __iomem *ddr2_ctlr_base;
     24	void __iomem *ddrpsc_reg_base;
     25	int ddrpsc_num;
     26	void __iomem *ddrpll_reg_base;
     27	void __iomem *deepsleep_reg;
     28	void __iomem *cpupll_reg_base;
     29	/*
     30	 * Note on SLEEPCOUNT:
     31	 * The SLEEPCOUNT feature is mainly intended for cases in which
     32	 * the internal oscillator is used. The internal oscillator is
     33	 * fully disabled in deep sleep mode.  When you exist deep sleep
     34	 * mode, the oscillator will be turned on and will generate very
     35	 * small oscillations which will not be detected by the deep sleep
     36	 * counter.  Eventually those oscillations will grow to an amplitude
     37	 * large enough to start incrementing the deep sleep counter.
     38	 * In this case recommendation from hardware engineers is that the
     39	 * SLEEPCOUNT be set to 4096.  This means that 4096 valid clock cycles
     40	 * must be detected before the clock is passed to the rest of the
     41	 * system.
     42	 * In the case that the internal oscillator is not used and the
     43	 * clock is generated externally, the SLEEPCOUNT value can be very
     44	 * small since the clock input is assumed to be stable before SoC
     45	 * is taken out of deepsleep mode.  A value of 128 would be more than
     46	 * adequate.
     47	 */
     48	int sleepcount;
     49};
     50
     51extern unsigned int davinci_cpu_suspend_sz;
     52extern void davinci_cpu_suspend(struct davinci_pm_config *);
     53
     54#endif