Subversion Repositories c0or1k

/*

 * This module allocates an unused virtual address range for shm segments.

 *

 * Copyright (C) 2007 Bahadir Balban

 */

#include <lib/bit.h>

#include <l4/macros.h>

#include <l4/types.h>

#include INC_GLUE(memory.h)

#include <lib/vaddr.h>

#include <stdio.h>

#include <memory.h>

void vaddr_pool_init(struct id_pool *pool, unsigned long start, unsigned long end)

{

        pool = id_pool_new_init(__pfn(end - start));

}

void *vaddr_new(struct id_pool *pool, int npages)

{

        unsigned int shm_vpfn;

        if ((int)(shm_vpfn = ids_new_contiguous(pool, npages)) < 0)

                return 0;

        return (void *)__pfn_to_addr(shm_vpfn + cont_mem_regions.shmem->start);

}

int vaddr_del(struct id_pool *pool, void *vaddr, int npages)

{

        unsigned long idpfn = __pfn(page_align(vaddr) -

                                    __pfn_to_addr(cont_mem_regions.shmem->start));

        if (ids_del_contiguous(pool, idpfn, npages) < 0) {

                printf("%s: Invalid address range returned to "

                       "virtual address pool.\n", __FUNCTION__);

                return -1;

        }

        return 0;

}