io.c

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/*
 * iop13xx custom ioremap implementation
 * Copyright (c) 2005-2006, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307 USA.
 *
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/io.h>
#include <mach/hardware.h>

#include "pci.h"

static void __iomem *__iop13xx_ioremap_caller(unsigned long cookie,
    size_t size, unsigned int mtype, void *caller)
{
    void __iomem * retval;

    switch (cookie) {
    case IOP13XX_PCIX_LOWER_MEM_RA ... IOP13XX_PCIX_UPPER_MEM_RA:
        if (unlikely(!iop13xx_atux_mem_base))
            retval = NULL;
        else
            retval = (iop13xx_atux_mem_base +
                     (cookie - IOP13XX_PCIX_LOWER_MEM_RA));
        break;
    case IOP13XX_PCIE_LOWER_MEM_RA ... IOP13XX_PCIE_UPPER_MEM_RA:
        if (unlikely(!iop13xx_atue_mem_base))
            retval = NULL;
        else
            retval = (iop13xx_atue_mem_base +
                     (cookie - IOP13XX_PCIE_LOWER_MEM_RA));
        break;
    case IOP13XX_PBI_LOWER_MEM_RA ... IOP13XX_PBI_UPPER_MEM_RA:
        retval = __arm_ioremap_caller(IOP13XX_PBI_LOWER_MEM_PA +
                       (cookie - IOP13XX_PBI_LOWER_MEM_RA),
                       size, mtype, __builtin_return_address(0));
        break;
    case IOP13XX_PMMR_PHYS_MEM_BASE ... IOP13XX_PMMR_UPPER_MEM_PA:
        retval = IOP13XX_PMMR_PHYS_TO_VIRT(cookie);
        break;
    default:
        retval = __arm_ioremap_caller(cookie, size, mtype,
                caller);
    }

    return retval;
}

static void __iop13xx_iounmap(volatile void __iomem *addr)
{
    if (iop13xx_atue_mem_base)
        if (addr >= (void __iomem *) iop13xx_atue_mem_base &&
            addr < (void __iomem *) (iop13xx_atue_mem_base +
                             iop13xx_atue_mem_size))
            goto skip;

    if (iop13xx_atux_mem_base)
        if (addr >= (void __iomem *) iop13xx_atux_mem_base &&
            addr < (void __iomem *) (iop13xx_atux_mem_base +
                             iop13xx_atux_mem_size))
            goto skip;

    switch ((u32) addr) {
    case (u32)IOP13XX_PMMR_VIRT_MEM_BASE ... (u32)IOP13XX_PMMR_UPPER_MEM_VA:
        goto skip;
    }
    __iounmap(addr);

skip:
    return;
}

void __init iop13xx_init_early(void)
{
    arch_ioremap_caller = __iop13xx_ioremap_caller;
    arch_iounmap = __iop13xx_iounmap;
}