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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cats-pci.c (1415B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * linux/arch/arm/mach-footbridge/cats-pci.c
      4 *
      5 * PCI bios-type initialisation for PCI machines
      6 *
      7 * Bits taken from various places.
      8 */
      9#include <linux/kernel.h>
     10#include <linux/pci.h>
     11#include <linux/init.h>
     12
     13#include <asm/irq.h>
     14#include <asm/mach/pci.h>
     15#include <asm/mach-types.h>
     16
     17/* cats host-specific stuff */
     18static int irqmap_cats[] = { IRQ_PCI, IRQ_IN0, IRQ_IN1, IRQ_IN3 };
     19
     20static u8 cats_no_swizzle(struct pci_dev *dev, u8 *pin)
     21{
     22	return 0;
     23}
     24
     25static int cats_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
     26{
     27	if (dev->irq >= 255)
     28		return -1;	/* not a valid interrupt. */
     29
     30	if (dev->irq >= 128)
     31		return dev->irq & 0x1f;
     32
     33	if (dev->irq >= 1 && dev->irq <= 4)
     34		return irqmap_cats[dev->irq - 1];
     35
     36	if (dev->irq != 0)
     37		printk("PCI: device %02x:%02x has unknown irq line %x\n",
     38		       dev->bus->number, dev->devfn, dev->irq);
     39
     40	return -1;
     41}
     42
     43/*
     44 * why not the standard PCI swizzle?  does this prevent 4-port tulip
     45 * cards being used (ie, pci-pci bridge based cards)?
     46 */
     47static struct hw_pci cats_pci __initdata = {
     48	.swizzle		= cats_no_swizzle,
     49	.map_irq		= cats_map_irq,
     50	.nr_controllers		= 1,
     51	.ops			= &dc21285_ops,
     52	.setup			= dc21285_setup,
     53	.preinit		= dc21285_preinit,
     54	.postinit		= dc21285_postinit,
     55};
     56
     57static int __init cats_pci_init(void)
     58{
     59	if (machine_is_cats())
     60		pci_common_init(&cats_pci);
     61	return 0;
     62}
     63
     64subsys_initcall(cats_pci_init);