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
  26 static 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
  62 static 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
  82 skip:
  83         return;
  84 }
  85
  86 void __init iop13xx_init_early(void)
  87 {
  88         arch_ioremap_caller = __iop13xx_ioremap_caller;
  89         arch_iounmap = __iop13xx_iounmap;
  90 }