libsel4vspace/src/arch/x86/mapping.c

/*
 * Copyright 2018, Data61
 * Commonwealth Scientific and Industrial Research Organisation (CSIRO)
 * ABN 41 687 119 230.
 *
 * This software may be distributed and modified according to the terms of
 * the BSD 2-Clause license. Note that NO WARRANTY is provided.
 * See "LICENSE_BSD2.txt" for details.
 *
 * @TAG(DATA61_BSD)
 */

#include <autoconf.h>
#include <vspace/mapping.h>

static seL4_Error vspace_map_io(seL4_CPtr cap, seL4_CPtr iospace_root, seL4_Word vaddr, UNUSED seL4_Word attr)
{
#ifdef CONFIG_IOMMU
    return seL4_X86_IOPageTable_Map(cap, iospace_root, vaddr);
#endif
}

int vspace_get_iospace_map_obj(UNUSED seL4_Word failed_bits, vspace_map_obj_t *obj)
{
    if (unlikely(obj == NULL) || !config_set(CONFIG_IOMMU)) {
        return EINVAL;
    }
#ifdef CONFIG_IOMMU
    obj->size_bits = seL4_IOPageTableBits;
    obj->type = seL4_X86_IOPageTableObject;
    obj->map_fn = vspace_map_io;
    return 0;
#endif
}

int vspace_get_ept_map_obj(seL4_Word failed_bits, vspace_map_obj_t *obj)
{
    switch (failed_bits) {
#ifdef CONFIG_VTX
    case SEL4_MAPPING_LOOKUP_NO_PT:
        obj->size_bits = seL4_X86_EPTPTBits;
        obj->type = seL4_X86_EPTPTObject;
        obj->map_fn = seL4_X86_EPTPT_Map;
        return 0;
    case SEL4_MAPPING_LOOKUP_NO_PD:
        obj->size_bits = seL4_X86_EPTPDBits;
        obj->type = seL4_X86_EPTPDObject;
        obj->map_fn = seL4_X86_EPTPD_Map;
        return 0;
    case SEL4_MAPPING_LOOKUP_NO_PDPT:
        obj->size_bits = seL4_EPTPDPTBits;
        obj->type = seL4_X86_EPTPDPTObject;
        obj->map_fn = seL4_X86_EPTPDPT_Map;
        return 0;
#endif
    default:
        return EINVAL;
    }
}