include/asm-sh/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 struct pci_dev;
  36
  37 extern void pcibios_set_master(struct pci_dev *dev);
  38
  39 static inline void pcibios_penalize_isa_irq(int irq, int active)
  40 {
  41         /* We don't do dynamic PCI IRQ allocation */
  42 }
  43
  44 /* Dynamic DMA mapping stuff.
  45  * SuperH has everything mapped statically like x86.
  46  */
  47
  48 /* The PCI address space does equal the physical memory
  49  * address space.  The networking and block device layers use
  50  * this boolean for bounce buffer decisions.
  51  */
  52 #define PCI_DMA_BUS_IS_PHYS     (1)
  53
  54 #include <linux/types.h>
  55 #include <linux/slab.h>
  56 #include <asm/scatterlist.h>
  57 #include <linux/string.h>
  58 #include <asm/io.h>
  59
  60 /* pci_unmap_{single,page} being a nop depends upon the
  61  * configuration.
  62  */
  63 #ifdef CONFIG_SH_PCIDMA_NONCOHERENT
  64 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       \
  65         dma_addr_t ADDR_NAME;
  66 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         \
  67         __u32 LEN_NAME;
  68 #define pci_unmap_addr(PTR, ADDR_NAME)                  \
  69         ((PTR)->ADDR_NAME)
  70 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)         \
  71         (((PTR)->ADDR_NAME) = (VAL))
  72 #define pci_unmap_len(PTR, LEN_NAME)                    \
  73         ((PTR)->LEN_NAME)
  74 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)           \
  75         (((PTR)->LEN_NAME) = (VAL))
  76 #else
  77 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
  78 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
  79 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
  80 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
  81 #define pci_unmap_len(PTR, LEN_NAME)            (0)
  82 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
  83 #endif
  84
  85 /* Not supporting more than 32-bit PCI bus addresses now, but
  86  * must satisfy references to this function.  Change if needed.
  87  */
  88 #define pci_dac_dma_supported(pci_dev, mask) (0)
  89
  90 /* These macros should be used after a pci_map_sg call has been done
  91  * to get bus addresses of each of the SG entries and their lengths.
  92  * You should only work with the number of sg entries pci_map_sg
  93  * returns, or alternatively stop on the first sg_dma_len(sg) which
  94  * is 0.
  95  */
  96 #define sg_dma_address(sg)      (virt_to_bus((sg)->dma_address))
  97 #define sg_dma_len(sg)          ((sg)->length)
  98
  99 #ifdef CONFIG_PCI
 100 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 101                                         enum pci_dma_burst_strategy *strat,
 102                                         unsigned long *strategy_parameter)
 103 {
 104         *strat = PCI_DMA_BURST_INFINITY;
 105         *strategy_parameter = ~0UL;
 106 }
 107 #endif
 108
 109 /* Board-specific fixup routines. */
 110 extern void pcibios_fixup(void);
 111 extern void pcibios_fixup_irqs(void);
 112
 113 #ifdef CONFIG_PCI_AUTO
 114 extern int pciauto_assign_resources(int busno, struct pci_channel *hose);
 115 #endif
 116
 117 static inline void pcibios_add_platform_entries(struct pci_dev *dev)
 118 {
 119 }
 120
 121 #endif /* __KERNEL__ */
 122
 123 /* generic pci stuff */
 124 #include <asm-generic/pci.h>
 125
 126 /* generic DMA-mapping stuff */
 127 #include <asm-generic/pci-dma-compat.h>
 128
 129 #endif /* __ASM_SH_PCI_H */
 130