1/*
2 * Copyright 2018, 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#pragma once
13
14#include <sel4/types.h>
15#include <assert.h>
16#include <autoconf.h>
17#include <sel4vka/gen_config.h>
18#include <utils/util.h>
19
20#define seL4_PageDirBits seL4_PageTableBits
21
22enum _riscv_kobject_type {
23    KOBJECT_PAGE_DIRECTORY,
24    KOBJECT_PAGE_TABLE,
25    KOBJECT_FRAME,
26    KOBJECT_ARCH_NUM_TYPES,
27};
28typedef int kobject_t;
29
30/*
31 * Get the size (in bits) of the untyped memory required to
32 * create an object of the given size.
33 */
34static inline seL4_Word arch_kobject_get_size(kobject_t type, seL4_Word objectSize)
35{
36    switch (type) {
37    case KOBJECT_FRAME:
38        switch (objectSize) {
39        case seL4_PageBits:
40        case seL4_LargePageBits:
41            return objectSize;
42        }
43    /* If frame size was unknown fall through to default case as it
44     * might be a mode specific frame size */
45    default:
46        ZF_LOGE("Unknown object type");
47        return 0;
48    }
49}
50
51
52static inline seL4_Word arch_kobject_get_type(int type, seL4_Word objectSize)
53{
54    switch (type) {
55    case KOBJECT_PAGE_DIRECTORY:
56    case KOBJECT_PAGE_TABLE:
57        return seL4_RISCV_PageTableObject;
58    case KOBJECT_FRAME:
59        switch (objectSize) {
60        case seL4_PageBits:
61            return seL4_RISCV_4K_Page;
62        case seL4_LargePageBits:
63            return seL4_RISCV_Mega_Page;
64#if CONFIG_PT_LEVELS > 2
65        case seL4_HugePageBits:
66            return seL4_RISCV_Giga_Page;
67#endif
68#if CONFIG_PT_LEVELS > 3
69        case seL4_TeraPageBits:
70            return seL4_RISCV_Tera_Page;
71#endif
72        default:
73            ZF_LOGE("Unknown frame size %zu", (size_t) objectSize);
74            return -1;
75        }
76    default:
77        ZF_LOGE("Unknown object type %d", type);
78        return -1;
79    }
80}
81
82
83