include/asm-sh64/pci.h

   1 #ifndef __ASM_SH64_PCI_H
   2 #define __ASM_SH64_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  * These are currently the correct values for the STM overdrive board
  16  * We need some way of setting this on a board specific way, it will
  17  * not be the same on other boards I think
  18  */
  19 #if defined(CONFIG_CPU_SUBTYPE_SH5_101) || defined(CONFIG_CPU_SUBTYPE_SH5_103)
  20 #define PCIBIOS_MIN_IO          0x2000
  21 #define PCIBIOS_MIN_MEM         0x40000000
  22 #endif
  23
  24 extern void pcibios_set_master(struct pci_dev *dev);
  25
  26 /*
  27  * Set penalize isa irq function
  28  */
  29 static inline void pcibios_penalize_isa_irq(int irq, int active)
  30 {
  31         /* We don't do dynamic PCI IRQ allocation */
  32 }
  33
  34 /* Dynamic DMA mapping stuff.
  35  * SuperH has everything mapped statically like x86.
  36  */
  37
  38 /* The PCI address space does equal the physical memory
  39  * address space.  The networking and block device layers use
  40  * this boolean for bounce buffer decisions.
  41  */
  42 #define PCI_DMA_BUS_IS_PHYS     (1)
  43
  44 #include <linux/types.h>
  45 #include <linux/slab.h>
  46 #include <asm/scatterlist.h>
  47 #include <linux/string.h>
  48 #include <asm/io.h>
  49
  50 /* pci_unmap_{single,page} being a nop depends upon the
  51  * configuration.
  52  */
  53 #ifdef CONFIG_SH_PCIDMA_NONCOHERENT
  54 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       \
  55         dma_addr_t ADDR_NAME;
  56 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         \
  57         __u32 LEN_NAME;
  58 #define pci_unmap_addr(PTR, ADDR_NAME)                  \
  59         ((PTR)->ADDR_NAME)
  60 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)         \
  61         (((PTR)->ADDR_NAME) = (VAL))
  62 #define pci_unmap_len(PTR, LEN_NAME)                    \
  63         ((PTR)->LEN_NAME)
  64 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)           \
  65         (((PTR)->LEN_NAME) = (VAL))
  66 #else
  67 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
  68 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
  69 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
  70 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
  71 #define pci_unmap_len(PTR, LEN_NAME)            (0)
  72 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
  73 #endif
  74
  75 /* These macros should be used after a pci_map_sg call has been done
  76  * to get bus addresses of each of the SG entries and their lengths.
  77  * You should only work with the number of sg entries pci_map_sg
  78  * returns, or alternatively stop on the first sg_dma_len(sg) which
  79  * is 0.
  80  */
  81 #define sg_dma_address(sg)      ((sg)->dma_address)
  82 #define sg_dma_len(sg)          ((sg)->length)
  83
  84 #ifdef CONFIG_PCI
  85 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
  86                                         enum pci_dma_burst_strategy *strat,
  87                                         unsigned long *strategy_parameter)
  88 {
  89         *strat = PCI_DMA_BURST_INFINITY;
  90         *strategy_parameter = ~0UL;
  91 }
  92 #endif
  93
  94 /* Board-specific fixup routines. */
  95 extern void pcibios_fixup(void);
  96 extern void pcibios_fixup_irqs(void);
  97
  98 #ifdef CONFIG_PCI_AUTO
  99 extern int pciauto_assign_resources(int busno, struct pci_channel *hose);
 100 #endif
 101
 102 #endif /* __KERNEL__ */
 103
 104 /* generic pci stuff */
 105 #include <asm-generic/pci.h>
 106
 107 /* generic DMA-mapping stuff */
 108 #include <asm-generic/pci-dma-compat.h>
 109
 110 #endif /* __ASM_SH64_PCI_H */
 111