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40 lines
918 B
C
40 lines
918 B
C
/*
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* This module allocates an unused virtual address range for shm segments.
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*
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* Copyright (C) 2007 Bahadir Balban
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*/
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#include <lib/bit.h>
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#include <l4/macros.h>
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#include <l4/types.h>
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#include INC_GLUE(memory.h)
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#include <lib/vaddr.h>
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#include <stdio.h>
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void vaddr_pool_init(struct id_pool *pool, unsigned long start, unsigned long end)
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{
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pool = id_pool_new_init(__pfn(end - start));
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}
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void *vaddr_new(struct id_pool *pool, int npages)
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{
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unsigned int shm_vpfn;
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if ((int)(shm_vpfn = ids_new_contiguous(pool, npages)) < 0)
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return 0;
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return (void *)__pfn_to_addr(shm_vpfn + SHM_AREA_START);
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}
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int vaddr_del(struct id_pool *pool, void *vaddr, int npages)
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{
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unsigned long idpfn = __pfn(page_align(vaddr) - SHM_AREA_START);
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if (ids_del_contiguous(pool, idpfn, npages) < 0) {
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printf("%s: Invalid address range returned to "
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"virtual address pool.\n", __FUNCTION__);
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return -1;
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}
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return 0;
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}
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