LXR linux/arch/powerpc/include/asm/io-workarounds.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * Support PCI IO workaround
   4 *
   5 * (C) Copyright 2007-2008 TOSHIBA CORPORATION
   6 */
   7
   8#ifndef _IO_WORKAROUNDS_H
   9#define _IO_WORKAROUNDS_H
  10
  11#ifdef CONFIG_PPC_IO_WORKAROUNDS
  12#include <linux/io.h>
  13#include <asm/pci-bridge.h>
  14
  15/* Bus info */
  16struct iowa_bus {
  17        struct pci_controller *phb;
  18        struct ppc_pci_io *ops;
  19        void   *private;
  20};
  21
  22void iowa_register_bus(struct pci_controller *, struct ppc_pci_io *,
  23                       int (*)(struct iowa_bus *, void *), void *);
  24struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR);
  25struct iowa_bus *iowa_pio_find_bus(unsigned long);
  26
  27extern struct ppc_pci_io spiderpci_ops;
  28extern int spiderpci_iowa_init(struct iowa_bus *, void *);
  29
  30#define SPIDER_PCI_REG_BASE             0xd000
  31#define SPIDER_PCI_REG_SIZE             0x1000
  32#define SPIDER_PCI_VCI_CNTL_STAT        0x0110
  33#define SPIDER_PCI_DUMMY_READ           0x0810
  34#define SPIDER_PCI_DUMMY_READ_BASE      0x0814
  35
  36#endif
  37
  38#if defined(CONFIG_PPC_IO_WORKAROUNDS) && defined(CONFIG_PPC_INDIRECT_MMIO)
  39extern bool io_workaround_inited;
  40
  41static inline bool iowa_is_active(void)
  42{
  43        return unlikely(io_workaround_inited);
  44}
  45#else
  46static inline bool iowa_is_active(void)
  47{
  48        return false;
  49}
  50#endif
  51
  52void __iomem *iowa_ioremap(phys_addr_t addr, unsigned long size,
  53                           pgprot_t prot, void *caller);
  54
  55#endif /* _IO_WORKAROUNDS_H */
  56