1 #ifndef __ASM_SH_PCI_H 2 #define __ASM_SH_PCI_H 3 4 #ifdef __KERNEL__ 5 6 #include <linux/dma-mapping.h> 7 8 /* Can be used to override the logic in pci_scan_bus for skipping 9 already-configured bus numbers - to be used for buggy BIOSes 10 or architectures with incomplete PCI setup by the loader */ 11 12 #define pcibios_assign_all_busses() 1 13 14 /* 15 * A board can define one or more PCI channels that represent built-in (or 16 * external) PCI controllers. 17 */ 18 struct pci_channel { 19 struct pci_channel *next; 20 21 struct pci_ops *pci_ops; 22 struct resource *io_resource; 23 struct resource *mem_resource; 24 25 unsigned long io_offset; 26 unsigned long mem_offset; 27 28 unsigned long reg_base; 29 30 unsigned long io_map_base; 31 }; 32 33 extern void register_pci_controller(struct pci_channel *hose); 34 35 extern unsigned long PCIBIOS_MIN_IO, PCIBIOS_MIN_MEM; 36 37 struct pci_dev; 38 39 #define HAVE_PCI_MMAP 40 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, 41 enum pci_mmap_state mmap_state, int write_combine); 42 extern void pcibios_set_master(struct pci_dev *dev); 43 44 static inline void pcibios_penalize_isa_irq(int irq, int active) 45 { 46 /* We don't do dynamic PCI IRQ allocation */ 47 } 48 49 /* Dynamic DMA mapping stuff. 50 * SuperH has everything mapped statically like x86. 51 */ 52 53 /* The PCI address space does equal the physical memory 54 * address space. The networking and block device layers use 55 * this boolean for bounce buffer decisions. 56 */ 57 #define PCI_DMA_BUS_IS_PHYS (1) 58 59 #include <linux/types.h> 60 #include <linux/slab.h> 61 #include <asm/scatterlist.h> 62 #include <linux/string.h> 63 #include <asm/io.h> 64 65 /* pci_unmap_{single,page} being a nop depends upon the 66 * configuration. 67 */ 68 #ifdef CONFIG_SH_PCIDMA_NONCOHERENT 69 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \ 70 dma_addr_t ADDR_NAME; 71 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \ 72 __u32 LEN_NAME; 73 #define pci_unmap_addr(PTR, ADDR_NAME) \ 74 ((PTR)->ADDR_NAME) 75 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \ 76 (((PTR)->ADDR_NAME) = (VAL)) 77 #define pci_unmap_len(PTR, LEN_NAME) \ 78 ((PTR)->LEN_NAME) 79 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) \ 80 (((PTR)->LEN_NAME) = (VAL)) 81 #else 82 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) 83 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) 84 #define pci_unmap_addr(PTR, ADDR_NAME) (0) 85 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0) 86 #define pci_unmap_len(PTR, LEN_NAME) (0) 87 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0) 88 #endif 89 90 #ifdef CONFIG_PCI 91 /* 92 * None of the SH PCI controllers support MWI, it is always treated as a 93 * direct memory write. 94 */ 95 #define PCI_DISABLE_MWI 96 97 static inline void pci_dma_burst_advice(struct pci_dev *pdev, 98 enum pci_dma_burst_strategy *strat, 99 unsigned long *strategy_parameter) 100 { 101 unsigned long cacheline_size; 102 u8 byte; 103 104 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte); 105 106 if (byte == 0) 107 cacheline_size = L1_CACHE_BYTES; 108 else 109 cacheline_size = byte << 2; 110 111 *strat = PCI_DMA_BURST_MULTIPLE; 112 *strategy_parameter = cacheline_size; 113 } 114 #endif 115 116 #ifdef CONFIG_SUPERH32 117 /* 118 * If we're on an SH7751 or SH7780 PCI controller, PCI memory is mapped 119 * at the end of the address space in a special non-translatable area. 120 */ 121 #define PCI_MEM_FIXED_START 0xfd000000 122 #define PCI_MEM_FIXED_END (PCI_MEM_FIXED_START + 0x01000000) 123 124 #define is_pci_memory_fixed_range(s, e) \ 125 ((s) >= PCI_MEM_FIXED_START && (e) < PCI_MEM_FIXED_END) 126 #else 127 #define is_pci_memory_fixed_range(s, e) (0) 128 #endif 129 130 /* Board-specific fixup routines. */ 131 int pcibios_map_platform_irq(struct pci_dev *dev, u8 slot, u8 pin); 132 133 extern void pcibios_resource_to_bus(struct pci_dev *dev, 134 struct pci_bus_region *region, struct resource *res); 135 136 extern void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res, 137 struct pci_bus_region *region); 138 139 /* Chances are this interrupt is wired PC-style ... */ 140 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) 141 { 142 return channel ? 15 : 14; 143 } 144 145 /* generic DMA-mapping stuff */ 146 #include <asm-generic/pci-dma-compat.h> 147 148 #endif /* __KERNEL__ */ 149 #endif /* __ASM_SH_PCI_H */ 150 151