LXR linux/arch/arm/mach-iop13xx/io.c

   1/*
   2 * iop13xx custom ioremap implementation
   3 * Copyright (c) 2005-2006, Intel Corporation.
   4 *
   5 * This program is free software; you can redistribute it and/or modify it
   6 * under the terms and conditions of the GNU General Public License,
   7 * version 2, as published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope it will be useful, but WITHOUT
  10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12 * more details.
  13 *
  14 * You should have received a copy of the GNU General Public License along with
  15 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  16 * Place - Suite 330, Boston, MA 02111-1307 USA.
  17 *
  18 */
  19#include <linux/kernel.h>
  20#include <linux/module.h>
  21#include <linux/io.h>
  22#include <mach/hardware.h>
  23
  24#include "pci.h"
  25
  26static void __iomem *__iop13xx_ioremap_caller(unsigned long cookie,
  27        size_t size, unsigned int mtype, void *caller)
  28{
  29        void __iomem * retval;
  30
  31        switch (cookie) {
  32        case IOP13XX_PCIX_LOWER_MEM_RA ... IOP13XX_PCIX_UPPER_MEM_RA:
  33                if (unlikely(!iop13xx_atux_mem_base))
  34                        retval = NULL;
  35                else
  36                        retval = (iop13xx_atux_mem_base +
  37                                 (cookie - IOP13XX_PCIX_LOWER_MEM_RA));
  38                break;
  39        case IOP13XX_PCIE_LOWER_MEM_RA ... IOP13XX_PCIE_UPPER_MEM_RA:
  40                if (unlikely(!iop13xx_atue_mem_base))
  41                        retval = NULL;
  42                else
  43                        retval = (iop13xx_atue_mem_base +
  44                                 (cookie - IOP13XX_PCIE_LOWER_MEM_RA));
  45                break;
  46        case IOP13XX_PBI_LOWER_MEM_RA ... IOP13XX_PBI_UPPER_MEM_RA:
  47                retval = __arm_ioremap_caller(IOP13XX_PBI_LOWER_MEM_PA +
  48                                       (cookie - IOP13XX_PBI_LOWER_MEM_RA),
  49                                       size, mtype, __builtin_return_address(0));
  50                break;
  51        case IOP13XX_PMMR_PHYS_MEM_BASE ... IOP13XX_PMMR_UPPER_MEM_PA:
  52                retval = IOP13XX_PMMR_PHYS_TO_VIRT(cookie);
  53                break;
  54        default:
  55                retval = __arm_ioremap_caller(cookie, size, mtype,
  56                                caller);
  57        }
  58
  59        return retval;
  60}
  61
  62static void __iop13xx_iounmap(volatile void __iomem *addr)
  63{
  64        if (iop13xx_atue_mem_base)
  65                if (addr >= (void __iomem *) iop13xx_atue_mem_base &&
  66                    addr < (void __iomem *) (iop13xx_atue_mem_base +
  67                                             iop13xx_atue_mem_size))
  68                    goto skip;
  69
  70        if (iop13xx_atux_mem_base)
  71                if (addr >= (void __iomem *) iop13xx_atux_mem_base &&
  72                    addr < (void __iomem *) (iop13xx_atux_mem_base +
  73                                             iop13xx_atux_mem_size))
  74                    goto skip;
  75
  76        switch ((u32) addr) {
  77        case (u32)IOP13XX_PMMR_VIRT_MEM_BASE ... (u32)IOP13XX_PMMR_UPPER_MEM_VA:
  78                goto skip;
  79        }
  80        __iounmap(addr);
  81
  82skip:
  83        return;
  84}
  85
  86void __init iop13xx_init_early(void)
  87{
  88        arch_ioremap_caller = __iop13xx_ioremap_caller;
  89        arch_iounmap = __iop13xx_iounmap;
  90}
  91