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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wakeup-mask.c (906B)

      1// SPDX-License-Identifier: GPL-2.0
      2//
      3// Copyright 2010 Ben Dooks <ben-linux@fluff.org>
      4//
      5// Support for wakeup mask interrupts on newer SoCs
      6
      7#include <linux/kernel.h>
      8#include <linux/spinlock.h>
      9#include <linux/device.h>
     10#include <linux/types.h>
     11#include <linux/irq.h>
     12#include <linux/io.h>
     13
     14#include "wakeup-mask.h"
     15#include "pm.h"
     16
     17void samsung_sync_wakemask(void __iomem *reg,
     18			   const struct samsung_wakeup_mask *mask, int nr_mask)
     19{
     20	struct irq_data *data;
     21	u32 val;
     22
     23	val = __raw_readl(reg);
     24
     25	for (; nr_mask > 0; nr_mask--, mask++) {
     26		if (mask->irq == NO_WAKEUP_IRQ) {
     27			val |= mask->bit;
     28			continue;
     29		}
     30
     31		data = irq_get_irq_data(mask->irq);
     32
     33		/* bit of a liberty to read this directly from irq_data. */
     34		if (irqd_is_wakeup_set(data))
     35			val &= ~mask->bit;
     36		else
     37			val |= mask->bit;
     38	}
     39
     40	printk(KERN_INFO "wakemask %08x => %08x\n", __raw_readl(reg), val);
     41	__raw_writel(val, reg);
     42}