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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intc-5249.c (1447B)

      1/*
      2 * intc2.c  -- support for the 2nd INTC controller of the 5249
      3 *
      4 * (C) Copyright 2009, Greg Ungerer <gerg@snapgear.com>
      5 *
      6 * This file is subject to the terms and conditions of the GNU General Public
      7 * License.  See the file COPYING in the main directory of this archive
      8 * for more details.
      9 */
     10
     11#include <linux/types.h>
     12#include <linux/init.h>
     13#include <linux/kernel.h>
     14#include <linux/interrupt.h>
     15#include <linux/irq.h>
     16#include <linux/io.h>
     17#include <asm/coldfire.h>
     18#include <asm/mcfsim.h>
     19
     20static void intc2_irq_gpio_mask(struct irq_data *d)
     21{
     22	u32 imr;
     23	imr = readl(MCFSIM2_GPIOINTENABLE);
     24	imr &= ~(0x1 << (d->irq - MCF_IRQ_GPIO0));
     25	writel(imr, MCFSIM2_GPIOINTENABLE);
     26}
     27
     28static void intc2_irq_gpio_unmask(struct irq_data *d)
     29{
     30	u32 imr;
     31	imr = readl(MCFSIM2_GPIOINTENABLE);
     32	imr |= (0x1 << (d->irq - MCF_IRQ_GPIO0));
     33	writel(imr, MCFSIM2_GPIOINTENABLE);
     34}
     35
     36static void intc2_irq_gpio_ack(struct irq_data *d)
     37{
     38	writel(0x1 << (d->irq - MCF_IRQ_GPIO0), MCFSIM2_GPIOINTCLEAR);
     39}
     40
     41static struct irq_chip intc2_irq_gpio_chip = {
     42	.name		= "CF-INTC2",
     43	.irq_mask	= intc2_irq_gpio_mask,
     44	.irq_unmask	= intc2_irq_gpio_unmask,
     45	.irq_ack	= intc2_irq_gpio_ack,
     46};
     47
     48static int __init mcf_intc2_init(void)
     49{
     50	int irq;
     51
     52	/* GPIO interrupt sources */
     53	for (irq = MCF_IRQ_GPIO0; (irq <= MCF_IRQ_GPIO7); irq++) {
     54		irq_set_chip(irq, &intc2_irq_gpio_chip);
     55		irq_set_handler(irq, handle_edge_irq);
     56	}
     57
     58	return 0;
     59}
     60
     61arch_initcall(mcf_intc2_init);