OmniNX/Atmosphere
2
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

kern: Implement new PageTable operations/PhysicalMemory reference semantics

Browse Source
This commit is contained in:
Michael Scire
2022-10-11 22:37:43 -07:00
committed by SciresM
parent 5ee7d8a5ed
commit 7f2cbba543
8 changed files with 91 additions and 155 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
libraries/libmesosphere/source/arch/arm64/kern_k_page_table.cpp
View File

@@ -348,7 +348,7 @@ namespace ams::kern::arch::arm64 {
MESOSPHERE_ASSERT(util::IsAligned(GetInteger(virt_addr), PageSize));
MESOSPHERE_ASSERT(this->ContainsPages(virt_addr, num_pages));
if (operation == OperationType_Map) {
if (operation == OperationType_Map || operation == OperationType_MapFirst) {
MESOSPHERE_ABORT_UNLESS(is_pa_valid);
MESOSPHERE_ASSERT(util::IsAligned(GetInteger(phys_addr), PageSize));
} else {
@@ -357,12 +357,26 @@ namespace ams::kern::arch::arm64 {
if (operation == OperationType_Unmap) {
R_RETURN(this->Unmap(virt_addr, num_pages, page_list, false, reuse_ll));
} else if (operation == OperationType_Separate) {
const size_t size = num_pages * PageSize;
R_TRY(this->SeparatePages(virt_addr, std::min(util::GetAlignment(GetInteger(virt_addr)), size), page_list, reuse_ll));
ON_RESULT_FAILURE { this->MergePages(virt_addr, page_list); };
if (num_pages > 1) {
const auto end_page = virt_addr + size;
const auto last_page = end_page - PageSize;
R_TRY(this->SeparatePages(last_page, std::min(util::GetAlignment(GetInteger(end_page)), size), page_list, reuse_ll));
}
R_SUCCEED();
} else {
auto entry_template = this->GetEntryTemplate(properties);
switch (operation) {
case OperationType_Map:
R_RETURN(this->MapContiguous(virt_addr, phys_addr, num_pages, entry_template, properties.disable_merge_attributes == DisableMergeAttribute_DisableHead, page_list, reuse_ll));
case OperationType_MapFirst:
R_RETURN(this->MapContiguous(virt_addr, phys_addr, num_pages, entry_template, properties.disable_merge_attributes == DisableMergeAttribute_DisableHead, operation != OperationType_MapFirst, page_list, reuse_ll));
case OperationType_ChangePermissions:
R_RETURN(this->ChangePermissions(virt_addr, num_pages, entry_template, properties.disable_merge_attributes, false, page_list, reuse_ll));
case OperationType_ChangePermissionsAndRefresh:
@@ -740,7 +754,7 @@ namespace ams::kern::arch::arm64 {
R_SUCCEED();
}
Result KPageTable::MapContiguous(KProcessAddress virt_addr, KPhysicalAddress phys_addr, size_t num_pages, PageTableEntry entry_template, bool disable_head_merge, PageLinkedList *page_list, bool reuse_ll) {
Result KPageTable::MapContiguous(KProcessAddress virt_addr, KPhysicalAddress phys_addr, size_t num_pages, PageTableEntry entry_template, bool disable_head_merge, bool not_first, PageLinkedList *page_list, bool reuse_ll) {
MESOSPHERE_ASSERT(this->IsLockedByCurrentThread());
/* Cache initial addresses for use on cleanup. */
@@ -811,7 +825,11 @@ namespace ams::kern::arch::arm64 {
/* Open references to the pages, if we should. */
if (IsHeapPhysicalAddress(orig_phys_addr)) {
Kernel::GetMemoryManager().Open(orig_phys_addr, num_pages);
if (not_first) {
Kernel::GetMemoryManager().Open(orig_phys_addr, num_pages);
} else {
Kernel::GetMemoryManager().OpenFirst(orig_phys_addr, num_pages);
}
}
R_SUCCEED();