1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/*
* Copyright (C) 2018-2021 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "shared/source/memory_manager/page_table.h"
#include "shared/source/aub_mem_dump/page_table_entry_bits.h"
#include "shared/source/memory_manager/page_table.inl"
namespace NEO {
uintptr_t PTE::map(uintptr_t vm, size_t size, uint64_t entryBits, uint32_t memoryBank) {
const size_t shift = 12;
const auto mask = static_cast<uint32_t>(maxNBitValue(bits));
size_t indexStart = (vm >> shift) & mask;
size_t indexEnd = ((vm + size - 1) >> shift) & mask;
uintptr_t res = -1;
bool updateEntryBits = entryBits != PageTableEntry::nonValidBits;
uint64_t newEntryBits = entryBits & MemoryConstants::pageMask;
newEntryBits |= 0x1;
for (size_t index = indexStart; index <= indexEnd; index++) {
if (entries[index] == 0x0) {
uint64_t tmp = allocator->reserve4kPage(memoryBank);
entries[index] = reinterpret_cast<void *>(tmp | newEntryBits);
} else if (updateEntryBits) {
entries[index] = reinterpret_cast<void *>((reinterpret_cast<uintptr_t>(entries[index]) & MemoryConstants::page4kEntryMask) | newEntryBits);
}
res = std::min(reinterpret_cast<uintptr_t>(entries[index]) & MemoryConstants::page4kEntryMask, res);
}
return (res & ~newEntryBits) + (vm & (pageSize - 1));
}
void PTE::pageWalk(uintptr_t vm, size_t size, size_t offset, uint64_t entryBits, PageWalker &pageWalker, uint32_t memoryBank) {
static const uint32_t bits = 9;
const size_t shift = 12;
const auto mask = static_cast<uint32_t>(maxNBitValue(bits));
size_t indexStart = (vm >> shift) & mask;
size_t indexEnd = ((vm + size - 1) >> shift) & mask;
uint64_t res = -1;
uintptr_t rem = vm & (pageSize - 1);
bool updateEntryBits = entryBits != PageTableEntry::nonValidBits;
uint64_t newEntryBits = entryBits & MemoryConstants::pageMask;
newEntryBits |= 0x1;
for (size_t index = indexStart; index <= indexEnd; index++) {
if (entries[index] == 0x0) {
uint64_t tmp = allocator->reserve4kPage(memoryBank);
entries[index] = reinterpret_cast<void *>(tmp | newEntryBits);
} else if (updateEntryBits) {
entries[index] = reinterpret_cast<void *>((reinterpret_cast<uintptr_t>(entries[index]) & MemoryConstants::page4kEntryMask) | newEntryBits);
}
res = reinterpret_cast<uintptr_t>(entries[index]) & MemoryConstants::page4kEntryMask;
size_t lSize = std::min(pageSize - rem, size);
pageWalker((res & ~0x1) + rem, lSize, offset, reinterpret_cast<uintptr_t>(entries[index]) & MemoryConstants::pageMask);
size -= lSize;
offset += lSize;
rem = 0;
}
}
template class PageTable<class PDP, 3, 9>;
template class PageTable<class PDE, 2, 2>;
} // namespace NEO
|
