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		listInit = true;
22	}
23	if (size & 0xFFF) {
24		// Align to 4kB pages
25		size += ((~size) & 0xFFF) + 1;
26	}
27	SceUID memblock = sceKernelAllocMemBlock("anon", SCE_KERNEL_MEMBLOCK_TYPE_USER_RW, size, 0);
28	if (memblock < 0) {
29		return 0;
30	}
31	*SceUIDListAppend(&uids) = memblock;
32	void* ptr;
33	if (sceKernelGetMemBlockBase(memblock, &ptr) < 0) {
34		return 0;
35	}
36	return ptr;
37}
38
39void mappedMemoryFree(void* memory, size_t size) {
40	UNUSED(size);
41	size_t i;
42	for (i = 0; i < SceUIDListSize(&uids); ++i) {
43		SceUID uid = *SceUIDListGetPointer(&uids, i);
44		void* ptr;
45		if (sceKernelGetMemBlockBase(uid, &ptr) < 0) {
46			continue;
47		}
48		if (ptr == memory) {
49			sceKernelFreeMemBlock(uid);
50			SceUIDListShift(&uids, i, 1);
51			return;
52		}
53	}
54}