TDA4VM: [E-mirror][sdk8.5][tda4vm]convert physical address to virtual address

void *appMemMap_local(void *phys_ptr, uint32_t size)

{

    uint32_t  pageSize = getpagesize ();

    uintptr_t taddr;

    uint32_t  tsize;

    void     *virt_ptr = NULL;

    int32_t   status = 0;

    static int dev_mem_fd = -1;



    if(dev_mem_fd == -1)

    {

        dev_mem_fd = open("/dev/mem",O_RDWR|O_SYNC);

        if(dev_mem_fd  < 0)

        {

            ULOGE("[EBD]APP_LOG: ERROR: Unable to open /dev/mem !!!\n");

            status = -1;

        }

    }

    if(status==0 && dev_mem_fd >= 0)

    {

        #ifdef APP_LOG_DEBUG

        printf("APP_LOG: Mapping %p ...\n", phys_ptr);

        #endif

        /* Mapping this physical address to linux user space */

        taddr = (uintptr_t)phys_ptr;

        tsize = size;



        /* Align the physical address to page boundary */

        tsize = Align(tsize + (taddr % pageSize), pageSize);

        taddr = Floor(taddr, pageSize);



        virt_ptr  = mmap(0, tsize,

                        (PROT_READ | PROT_WRITE),

                        (MAP_SHARED), dev_mem_fd, taddr);



        if(virt_ptr==MAP_FAILED)

        {

            virt_ptr = NULL;

        }

        else

        {

            virt_ptr = (void*)((uintptr_t)virt_ptr + ((uintptr_t)phys_ptr % pageSize));

        }

        #ifdef APP_LOG_DEBUG

        printf("APP_LOG: Mapped %p -> %p of size %d bytes \n", phys_ptr, virt_ptr, size);

        #endif

    }

    if(virt_ptr==NULL)

    {

         ULOGE("[EBD]APP_LOG: ERROR: Unable to map memory @ %p of size %d bytes !!!\n", phys_ptr, size);

    }

    return virt_ptr;

}