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/*
* Copyright 2008-2012 Freescale Semiconductor Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Freescale Semiconductor nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") as published by the Free Software
* Foundation, either version 2 of that License or (at your option) any
* later version.
*
* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/version.h>
#if defined(CONFIG_MODVERSIONS) && !defined(MODVERSIONS)
#define MODVERSIONS
#endif
#ifdef MODVERSIONS
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
#include <linux/modversions.h>
#else
#include <config/modversions.h>
#endif /* LINUX_VERSION_CODE */
#endif /* MODVERSIONS */
#include <linux/module.h>
#include <linux/kernel.h>
#include <asm/io.h>
#include "std_ext.h"
#include "error_ext.h"
#include "string_ext.h"
#include "list_ext.h"
#include "sys_io_ext.h"
#define __ERR_MODULE__ MODULE_UNKNOWN
typedef struct {
uint64_t virtAddr;
uint64_t physAddr;
uint32_t size;
t_List node;
} t_IoMap;
#define IOMAP_OBJECT(ptr) LIST_OBJECT(ptr, t_IoMap, node)
LIST(mapsList);
static void EnqueueIoMap(t_IoMap *p_IoMap)
{
uint32_t intFlags;
intFlags = XX_DisableAllIntr();
LIST_AddToTail(&p_IoMap->node, &mapsList);
XX_RestoreAllIntr(intFlags);
}
static t_IoMap * FindIoMapByVirtAddr(uint64_t addr)
{
t_IoMap *p_IoMap;
t_List *p_Pos;
LIST_FOR_EACH(p_Pos, &mapsList)
{
p_IoMap = IOMAP_OBJECT(p_Pos);
if ((addr >= p_IoMap->virtAddr) && (addr < p_IoMap->virtAddr+p_IoMap->size))
return p_IoMap;
}
return NULL;
}
static t_IoMap * FindIoMapByPhysAddr(uint64_t addr)
{
t_IoMap *p_IoMap;
t_List *p_Pos;
LIST_FOR_EACH(p_Pos, &mapsList)
{
p_IoMap = IOMAP_OBJECT(p_Pos);
if ((addr >= p_IoMap->physAddr) && (addr < p_IoMap->physAddr+p_IoMap->size))
return p_IoMap;
}
return NULL;
}
t_Error SYS_RegisterIoMap (uint64_t virtAddr, uint64_t physAddr, uint32_t size)
{
t_IoMap *p_IoMap;
p_IoMap = (t_IoMap*)XX_Malloc(sizeof(t_IoMap));
if (!p_IoMap)
RETURN_ERROR(MINOR, E_NO_MEMORY, ("message handler object!!!"));
memset(p_IoMap, 0, sizeof(t_IoMap));
p_IoMap->virtAddr = virtAddr;
p_IoMap->physAddr = physAddr;
p_IoMap->size = size;
INIT_LIST(&p_IoMap->node);
EnqueueIoMap(p_IoMap);
return E_OK;
}
t_Error SYS_UnregisterIoMap (uint64_t virtAddr)
{
t_IoMap *p_IoMap = FindIoMapByVirtAddr(virtAddr);
if (!p_IoMap)
RETURN_ERROR(MINOR, E_NO_DEVICE, ("message handler not found in list!!!"));
LIST_Del(&p_IoMap->node);
XX_Free(p_IoMap);
return E_OK;
}
uint64_t SYS_PhysToVirt(uint64_t addr)
{
t_IoMap *p_IoMap = FindIoMapByPhysAddr(addr);
if (p_IoMap)
{
/* This is optimization - put the latest in the list-head - like a cache */
if (mapsList.p_Next != &p_IoMap->node)
{
uint32_t intFlags = XX_DisableAllIntr();
LIST_DelAndInit(&p_IoMap->node);
LIST_Add(&p_IoMap->node, &mapsList);
XX_RestoreAllIntr(intFlags);
}
return (uint64_t)(addr - p_IoMap->physAddr + p_IoMap->virtAddr);
}
return PTR_TO_UINT(phys_to_virt((unsigned long)addr));
}
uint64_t SYS_VirtToPhys(uint64_t addr)
{
t_IoMap *p_IoMap;
if (addr == 0)
return 0;
p_IoMap = FindIoMapByVirtAddr(addr);
if (p_IoMap)
return (uint64_t)(addr - p_IoMap->virtAddr + p_IoMap->physAddr);
return (uint64_t)virt_to_phys(UINT_TO_PTR(addr));
}
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