src/platform/psp2/psp2-memory.c (view raw)
1/* Copyright (c) 2013-2015 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include <mgba-util/memory.h>
7#include <mgba-util/vector.h>
8
9#include <psp2/kernel/sysmem.h>
10#include <psp2/types.h>
11
12DECLARE_VECTOR(SceUIDList, SceUID);
13DEFINE_VECTOR(SceUIDList, SceUID);
14
15static struct SceUIDList uids;
16static bool listInit = false;
17
18void* anonymousMemoryMap(size_t size) {
19 if (!listInit) {
20 SceUIDListInit(&uids, 8);
21 }
22 if (size & 0xFFF) {
23 // Align to 4kB pages
24 size += ((~size) & 0xFFF) + 1;
25 }
26 SceUID memblock = sceKernelAllocMemBlock("anon", SCE_KERNEL_MEMBLOCK_TYPE_USER_RW, size, 0);
27 if (memblock < 0) {
28 return 0;
29 }
30 *SceUIDListAppend(&uids) = memblock;
31 void* ptr;
32 if (sceKernelGetMemBlockBase(memblock, &ptr) < 0) {
33 return 0;
34 }
35 return ptr;
36}
37
38void mappedMemoryFree(void* memory, size_t size) {
39 UNUSED(size);
40 size_t i;
41 for (i = 0; i < SceUIDListSize(&uids); ++i) {
42 SceUID uid = *SceUIDListGetPointer(&uids, i);
43 void* ptr;
44 if (sceKernelGetMemBlockBase(uid, &ptr) < 0) {
45 continue;
46 }
47 if (ptr == memory) {
48 sceKernelFreeMemBlock(uid);
49 SceUIDListShift(&uids, i, 1);
50 return;
51 }
52 }
53}