release/src-rt-6.x/linux/linux-2.6/include/asm-xtensa/pci.h

   1 /*
   2  * linux/include/asm-xtensa/pci.h
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (C) 2001 - 2005 Tensilica Inc.
   9  */
  10
  11 #ifndef _XTENSA_PCI_H
  12 #define _XTENSA_PCI_H
  13
  14 #ifdef __KERNEL__
  15
  16 /* Can be used to override the logic in pci_scan_bus for skipping
  17  * already-configured bus numbers - to be used for buggy BIOSes
  18  * or architectures with incomplete PCI setup by the loader
  19  */
  20
  21 #define pcibios_assign_all_busses()     0
  22
  23 extern struct pci_controller* pcibios_alloc_controller(void);
  24
  25 static inline void pcibios_set_master(struct pci_dev *dev)
  26 {
  27         /* No special bus mastering setup handling */
  28 }
  29
  30 static inline void pcibios_penalize_isa_irq(int irq)
  31 {
  32         /* We don't do dynamic PCI IRQ allocation */
  33 }
  34
  35 /* Assume some values. (We should revise them, if necessary) */
  36
  37 #define PCIBIOS_MIN_IO          0x2000
  38 #define PCIBIOS_MIN_MEM         0x10000000
  39
  40 /* Dynamic DMA mapping stuff.
  41  * Xtensa has everything mapped statically like x86.
  42  */
  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 struct pci_dev;
  51
  52 /* The PCI address space does equal the physical memory address space.
  53  * The networking and block device layers use this boolean for bounce buffer
  54  * decisions.
  55  */
  56
  57 #define PCI_DMA_BUS_IS_PHYS     (1)
  58
  59 /* pci_unmap_{page,single} is a no-op, so */
  60 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
  61 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
  62 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
  63 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
  64 #define pci_ubnmap_len(PTR, LEN_NAME)           (0)
  65 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
  66
  67 /* We cannot access memory above 4GB */
  68 #define pci_dac_dma_supported(pci_dev, mask)    (0)
  69
  70 /* Map a range of PCI memory or I/O space for a device into user space */
  71 int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
  72                         enum pci_mmap_state mmap_state, int write_combine);
  73
  74 /* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */
  75 #define HAVE_PCI_MMAP   1
  76
  77 static inline void pcibios_add_platform_entries(struct pci_dev *dev)
  78 {
  79 }
  80
  81 #endif /* __KERNEL__ */
  82
  83 /* Implement the pci_ DMA API in terms of the generic device dma_ one */
  84 #include <asm-generic/pci-dma-compat.h>
  85
  86 /* Generic PCI */
  87 #include <asm-generic/pci.h>
  88
  89 #endif  /* _XTENSA_PCI_H */