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 */
  16 struct iowa_bus {
  17         struct pci_controller *phb;
  18         struct ppc_pci_io *ops;
  19         void   *private;
  20 };
  21
  22 void iowa_register_bus(struct pci_controller *, struct ppc_pci_io *,
  23                        int (*)(struct iowa_bus *, void *), void *);
  24 struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR);
  25 struct iowa_bus *iowa_pio_find_bus(unsigned long);
  26
  27 extern struct ppc_pci_io spiderpci_ops;
  28 extern 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)
  39 extern bool io_workaround_inited;
  40
  41 static inline bool iowa_is_active(void)
  42 {
  43         return unlikely(io_workaround_inited);
  44 }
  45 #else
  46 static inline bool iowa_is_active(void)
  47 {
  48         return false;
  49 }
  50 #endif
  51
  52 void __iomem *iowa_ioremap(phys_addr_t addr, unsigned long size,
  53                            pgprot_t prot, void *caller);
  54
  55 #endif /* _IO_WORKAROUNDS_H */