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 */ 56