arch/sh/include/asm/pci.h

   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 #define pcibios_scan_all_fns(a, b)      0
  14
  15 /*
  16  * A board can define one or more PCI channels that represent built-in (or
  17  * external) PCI controllers.
  18  */
  19 struct pci_channel {
  20         struct pci_ops *pci_ops;
  21         struct resource *io_resource;
  22         struct resource *mem_resource;
  23         int first_devfn;
  24         int last_devfn;
  25 };
  26
  27 /*
  28  * Each board initializes this array and terminates it with a NULL entry.
  29  */
  30 extern struct pci_channel board_pci_channels[];
  31
  32 #define PCIBIOS_MIN_IO          board_pci_channels->io_resource->start
  33 #define PCIBIOS_MIN_MEM         board_pci_channels->mem_resource->start
  34
  35 /*
  36  * I/O routine helpers
  37  */
  38 #if defined(CONFIG_CPU_SUBTYPE_SH7780) || defined(CONFIG_CPU_SUBTYPE_SH7785)
  39 #define PCI_IO_AREA             0xFE400000
  40 #define PCI_IO_SIZE             0x00400000
  41 #elif defined(CONFIG_CPU_SH5)
  42 extern unsigned long PCI_IO_AREA;
  43 #define PCI_IO_SIZE             0x00010000
  44 #else
  45 #define PCI_IO_AREA             0xFE240000
  46 #define PCI_IO_SIZE             0x00040000
  47 #endif
  48
  49 #define PCI_MEM_SIZE            0x01000000
  50
  51 #define SH4_PCIIOBR_MASK        0xFFFC0000
  52 #define pci_ioaddr(addr)        (PCI_IO_AREA + (addr & ~SH4_PCIIOBR_MASK))
  53
  54 #if defined(CONFIG_PCI)
  55 #define is_pci_ioaddr(port)             \
  56         (((port) >= PCIBIOS_MIN_IO) &&  \
  57          ((port) < (PCIBIOS_MIN_IO + PCI_IO_SIZE)))
  58 #define is_pci_memaddr(port)            \
  59         (((port) >= PCIBIOS_MIN_MEM) && \
  60          ((port) < (PCIBIOS_MIN_MEM + PCI_MEM_SIZE)))
  61 #else
  62 #define is_pci_ioaddr(port)     (0)
  63 #define is_pci_memaddr(port)    (0)
  64 #endif
  65
  66 struct pci_dev;
  67
  68 extern void pcibios_set_master(struct pci_dev *dev);
  69
  70 static inline void pcibios_penalize_isa_irq(int irq, int active)
  71 {
  72         /* We don't do dynamic PCI IRQ allocation */
  73 }
  74
  75 /* Dynamic DMA mapping stuff.
  76  * SuperH has everything mapped statically like x86.
  77  */
  78
  79 /* The PCI address space does equal the physical memory
  80  * address space.  The networking and block device layers use
  81  * this boolean for bounce buffer decisions.
  82  */
  83 #define PCI_DMA_BUS_IS_PHYS     (1)
  84
  85 #include <linux/types.h>
  86 #include <linux/slab.h>
  87 #include <asm/scatterlist.h>
  88 #include <linux/string.h>
  89 #include <asm/io.h>
  90
  91 /* pci_unmap_{single,page} being a nop depends upon the
  92  * configuration.
  93  */
  94 #ifdef CONFIG_SH_PCIDMA_NONCOHERENT
  95 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       \
  96         dma_addr_t ADDR_NAME;
  97 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         \
  98         __u32 LEN_NAME;
  99 #define pci_unmap_addr(PTR, ADDR_NAME)                  \
 100         ((PTR)->ADDR_NAME)
 101 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)         \
 102         (((PTR)->ADDR_NAME) = (VAL))
 103 #define pci_unmap_len(PTR, LEN_NAME)                    \
 104         ((PTR)->LEN_NAME)
 105 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)           \
 106         (((PTR)->LEN_NAME) = (VAL))
 107 #else
 108 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
 109 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
 110 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
 111 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
 112 #define pci_unmap_len(PTR, LEN_NAME)            (0)
 113 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
 114 #endif
 115
 116 #ifdef CONFIG_PCI
 117 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 118                                         enum pci_dma_burst_strategy *strat,
 119                                         unsigned long *strategy_parameter)
 120 {
 121         *strat = PCI_DMA_BURST_INFINITY;
 122         *strategy_parameter = ~0UL;
 123 }
 124 #endif
 125
 126 /* Board-specific fixup routines. */
 127 void pcibios_fixup(void);
 128 int pcibios_init_platform(void);
 129 int pcibios_map_platform_irq(struct pci_dev *dev, u8 slot, u8 pin);
 130
 131 #ifdef CONFIG_PCI_AUTO
 132 int pciauto_assign_resources(int busno, struct pci_channel *hose);
 133 #endif
 134
 135 #endif /* __KERNEL__ */
 136
 137 /* generic pci stuff */
 138 #include <asm-generic/pci.h>
 139
 140 /* generic DMA-mapping stuff */
 141 #include <asm-generic/pci-dma-compat.h>
 142
 143 #endif /* __ASM_SH_PCI_H */
 144