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

http://github.com/mirrors/linux
C Header | 55 lines | 37 code | 11 blank | 7 comment | 1 complexity | 8357c292ff0fa01ca1c6ef4ab1ea116d MD5 | raw file
 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 */