1/*
2 * Copyright 2017, Data61
3 * Commonwealth Scientific and Industrial Research Organisation (CSIRO)
4 * ABN 41 687 119 230.
5 *
6 * This software may be distributed and modified according to the terms of
7 * the BSD 2-Clause license. Note that NO WARRANTY is provided.
8 * See "LICENSE_BSD2.txt" for details.
9 *
10 * @TAG(DATA61_BSD)
11 */
12
13#pragma once
14
15#include <autoconf.h>
16#include <sel4/types.h>
17#include <allocman/cspace/cspace.h>
18#include <vka/vka.h>
19
20/* This is a proxy allocator that just passes any allocs/frees to a vka interface */
21static inline cspacepath_t _cspace_vka_make_path(void *_cspace, seL4_CPtr slot)
22{
23    vka_t *vka = (vka_t*)_cspace;
24    cspacepath_t path;
25    vka_cspace_make_path(vka, slot, &path);
26    return path;
27}
28
29static int _cspace_vka_alloc(struct allocman *alloc, void *_cspace, cspacepath_t *slot)
30{
31    vka_t *vka = (vka_t*)_cspace;
32    (void)alloc;
33    return vka_cspace_alloc_path(vka, slot);
34}
35static void _cspace_vka_free(struct allocman *alloc, void *_cspace, const cspacepath_t *slot)
36{
37    vka_t *vka = (vka_t*)_cspace;
38    (void)alloc;
39    vka_cspace_free(vka, slot->capPtr);
40}
41
42/**
43 * Make a cspace interface from a VKA. It is the responsibility of the caller to ensure
44 * that this pointer remains valid for as long as this cspace is used
45 *
46 * @param vka Allocator to proxy cspace calls to
47 * @return cspace_interface that can be given to allocman
48 */
49static inline struct cspace_interface cspace_vka_make_interface(vka_t *vka) {
50    return (struct cspace_interface){
51        .alloc = _cspace_vka_alloc,
52        .free = _cspace_vka_free,
53        .make_path = _cspace_vka_make_path,
54        /* VKA is not guaranteed to recurse */
55        .properties = ALLOCMAN_DEFAULT_PROPERTIES,
56        .cspace = vka
57    };
58}
59
60