arch/mips/pci/pci.c

   1 /*
   2  * This program is free software; you can redistribute  it and/or modify it
   3  * under  the terms of  the GNU General  Public License as published by the
   4  * Free Software Foundation;  either version 2 of the  License, or (at your
   5  * option) any later version.
   6  *
   7  * Copyright (C) 2003, 04, 11 Ralf Baechle (ralf@linux-mips.org)
   8  * Copyright (C) 2011 Wind River Systems,
   9  *   written by Ralf Baechle (ralf@linux-mips.org)
  10  */
  11 #include <linux/bug.h>
  12 #include <linux/kernel.h>
  13 #include <linux/mm.h>
  14 #include <linux/bootmem.h>
  15 #include <linux/export.h>
  16 #include <linux/init.h>
  17 #include <linux/types.h>
  18 #include <linux/pci.h>
  19 #include <linux/of_address.h>
  20
  21 #include <asm/cpu-info.h>
  22
  23 unsigned long PCIBIOS_MIN_IO;
  24 EXPORT_SYMBOL(PCIBIOS_MIN_IO);
  25
  26 unsigned long PCIBIOS_MIN_MEM;
  27 EXPORT_SYMBOL(PCIBIOS_MIN_MEM);
  28
  29 static int __init pcibios_set_cache_line_size(void)
  30 {
  31         unsigned int lsize;
  32
  33         /*
  34          * Set PCI cacheline size to that of the highest level in the
  35          * cache hierarchy.
  36          */
  37         lsize = cpu_dcache_line_size();
  38         lsize = cpu_scache_line_size() ? : lsize;
  39         lsize = cpu_tcache_line_size() ? : lsize;
  40
  41         BUG_ON(!lsize);
  42
  43         pci_dfl_cache_line_size = lsize >> 2;
  44
  45         pr_debug("PCI: pci_cache_line_size set to %d bytes\n", lsize);
  46         return 0;
  47 }
  48 arch_initcall(pcibios_set_cache_line_size);
  49
  50 void pci_resource_to_user(const struct pci_dev *dev, int bar,
  51                           const struct resource *rsrc, resource_size_t *start,
  52                           resource_size_t *end)
  53 {
  54         phys_addr_t size = resource_size(rsrc);
  55
  56         *start = fixup_bigphys_addr(rsrc->start, size);
  57         *end = rsrc->start + size;
  58 }