summaryrefslogtreecommitdiff
path: root/Kernel/MemoryManager.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'Kernel/MemoryManager.cpp')
-rw-r--r--Kernel/MemoryManager.cpp182
1 files changed, 91 insertions, 91 deletions
diff --git a/Kernel/MemoryManager.cpp b/Kernel/MemoryManager.cpp
index a81b6767c3..65e8550870 100644
--- a/Kernel/MemoryManager.cpp
+++ b/Kernel/MemoryManager.cpp
@@ -21,12 +21,12 @@ MemoryManager& MM
MemoryManager::MemoryManager()
{
m_kernel_page_directory = (PageDirectory*)0x4000;
- m_pageTableZero = (dword*)0x6000;
- m_pageTableOne = (dword*)0x7000;
+ m_page_table_zero = (dword*)0x6000;
+ m_page_table_one = (dword*)0x7000;
m_next_laddr.set(0xd0000000);
- initializePaging();
+ initialize_paging();
}
MemoryManager::~MemoryManager()
@@ -60,12 +60,12 @@ void MemoryManager::release_page_directory(PageDirectory& page_directory)
#endif
}
-void MemoryManager::initializePaging()
+void MemoryManager::initialize_paging()
{
static_assert(sizeof(MemoryManager::PageDirectoryEntry) == 4);
static_assert(sizeof(MemoryManager::PageTableEntry) == 4);
- memset(m_pageTableZero, 0, PAGE_SIZE);
- memset(m_pageTableOne, 0, PAGE_SIZE);
+ memset(m_page_table_zero, 0, PAGE_SIZE);
+ memset(m_page_table_one, 0, PAGE_SIZE);
memset(m_kernel_page_directory, 0, sizeof(PageDirectory));
#ifdef MM_DEBUG
@@ -73,7 +73,7 @@ void MemoryManager::initializePaging()
#endif
// Make null dereferences crash.
- protectMap(LinearAddress(0), PAGE_SIZE);
+ map_protected(LinearAddress(0), PAGE_SIZE);
// The bottom 4 MB are identity mapped & supervisor only. Every process shares these mappings.
create_identity_mapping(LinearAddress(PAGE_SIZE), 4 * MB);
@@ -123,38 +123,38 @@ void MemoryManager::remove_identity_mapping(LinearAddress laddr, size_t size)
// FIXME: ASSERT(laddr is 4KB aligned);
for (dword offset = 0; offset < size; offset += PAGE_SIZE) {
auto pte_address = laddr.offset(offset);
- auto pte = ensurePTE(m_kernel_page_directory, pte_address);
- pte.setPhysicalPageBase(0);
- pte.setUserAllowed(false);
- pte.setPresent(true);
- pte.setWritable(true);
- flushTLB(pte_address);
+ auto pte = ensure_pte(m_kernel_page_directory, pte_address);
+ pte.set_physical_page_base(0);
+ pte.set_user_allowed(false);
+ pte.set_present(true);
+ pte.set_writable(true);
+ flush_tlb(pte_address);
}
}
-auto MemoryManager::ensurePTE(PageDirectory* page_directory, LinearAddress laddr) -> PageTableEntry
+auto MemoryManager::ensure_pte(PageDirectory* page_directory, LinearAddress laddr) -> PageTableEntry
{
ASSERT_INTERRUPTS_DISABLED();
dword page_directory_index = (laddr.get() >> 22) & 0x3ff;
dword page_table_index = (laddr.get() >> 12) & 0x3ff;
PageDirectoryEntry pde = PageDirectoryEntry(&page_directory->entries[page_directory_index]);
- if (!pde.isPresent()) {
+ if (!pde.is_present()) {
#ifdef MM_DEBUG
dbgprintf("MM: PDE %u not present, allocating\n", page_directory_index);
#endif
if (page_directory_index == 0) {
ASSERT(page_directory == m_kernel_page_directory);
- pde.setPageTableBase((dword)m_pageTableZero);
- pde.setUserAllowed(false);
- pde.setPresent(true);
- pde.setWritable(true);
+ pde.setPageTableBase((dword)m_page_table_zero);
+ pde.set_user_allowed(false);
+ pde.set_present(true);
+ pde.set_writable(true);
} else if (page_directory_index == 1) {
ASSERT(page_directory == m_kernel_page_directory);
- pde.setPageTableBase((dword)m_pageTableOne);
- pde.setUserAllowed(false);
- pde.setPresent(true);
- pde.setWritable(true);
+ pde.setPageTableBase((dword)m_page_table_one);
+ pde.set_user_allowed(false);
+ pde.set_present(true);
+ pde.set_writable(true);
} else {
auto page_table = allocate_page_table(*page_directory, page_directory_index);
#ifdef MM_DEBUG
@@ -167,27 +167,27 @@ auto MemoryManager::ensurePTE(PageDirectory* page_directory, LinearAddress laddr
#endif
pde.setPageTableBase(page_table->paddr().get());
- pde.setUserAllowed(true);
- pde.setPresent(true);
- pde.setWritable(true);
+ pde.set_user_allowed(true);
+ pde.set_present(true);
+ pde.set_writable(true);
page_directory->physical_pages[page_directory_index] = move(page_table);
}
}
return PageTableEntry(&pde.pageTableBase()[page_table_index]);
}
-void MemoryManager::protectMap(LinearAddress linearAddress, size_t length)
+void MemoryManager::map_protected(LinearAddress linearAddress, size_t length)
{
InterruptDisabler disabler;
// FIXME: ASSERT(linearAddress is 4KB aligned);
for (dword offset = 0; offset < length; offset += PAGE_SIZE) {
auto pteAddress = linearAddress.offset(offset);
- auto pte = ensurePTE(m_kernel_page_directory, pteAddress);
- pte.setPhysicalPageBase(pteAddress.get());
- pte.setUserAllowed(false);
- pte.setPresent(false);
- pte.setWritable(false);
- flushTLB(pteAddress);
+ auto pte = ensure_pte(m_kernel_page_directory, pteAddress);
+ pte.set_physical_page_base(pteAddress.get());
+ pte.set_user_allowed(false);
+ pte.set_present(false);
+ pte.set_writable(false);
+ flush_tlb(pteAddress);
}
}
@@ -197,12 +197,12 @@ void MemoryManager::create_identity_mapping(LinearAddress laddr, size_t size)
// FIXME: ASSERT(laddr is 4KB aligned);
for (dword offset = 0; offset < size; offset += PAGE_SIZE) {
auto pteAddress = laddr.offset(offset);
- auto pte = ensurePTE(m_kernel_page_directory, pteAddress);
- pte.setPhysicalPageBase(pteAddress.get());
- pte.setUserAllowed(false);
- pte.setPresent(true);
- pte.setWritable(true);
- flushTLB(pteAddress);
+ auto pte = ensure_pte(m_kernel_page_directory, pteAddress);
+ pte.set_physical_page_base(pteAddress.get());
+ pte.set_user_allowed(false);
+ pte.set_present(true);
+ pte.set_writable(true);
+ flush_tlb(pteAddress);
}
}
@@ -389,7 +389,7 @@ void MemoryManager::enter_process_paging_scope(Process& process)
asm volatile("movl %%eax, %%cr3"::"a"(process.m_page_directory):"memory");
}
-void MemoryManager::flushEntireTLB()
+void MemoryManager::flush_entire_tlb()
{
asm volatile(
"mov %cr3, %eax\n"
@@ -397,7 +397,7 @@ void MemoryManager::flushEntireTLB()
);
}
-void MemoryManager::flushTLB(LinearAddress laddr)
+void MemoryManager::flush_tlb(LinearAddress laddr)
{
asm volatile("invlpg %0": :"m" (*(char*)laddr.get()) : "memory");
}
@@ -406,12 +406,12 @@ byte* MemoryManager::quickmap_page(PhysicalPage& physical_page)
{
ASSERT_INTERRUPTS_DISABLED();
auto page_laddr = LinearAddress(4 * MB);
- auto pte = ensurePTE(m_kernel_page_directory, page_laddr);
- pte.setPhysicalPageBase(physical_page.paddr().get());
- pte.setPresent(true); // FIXME: Maybe we should use the is_readable flag here?
- pte.setWritable(true);
- pte.setUserAllowed(false);
- flushTLB(page_laddr);
+ auto pte = ensure_pte(m_kernel_page_directory, page_laddr);
+ pte.set_physical_page_base(physical_page.paddr().get());
+ pte.set_present(true); // FIXME: Maybe we should use the is_readable flag here?
+ pte.set_writable(true);
+ pte.set_user_allowed(false);
+ flush_tlb(page_laddr);
#ifdef MM_DEBUG
dbgprintf("MM: >> quickmap_page L%x => P%x\n", page_laddr, physical_page.paddr().get());
#endif
@@ -422,15 +422,15 @@ void MemoryManager::unquickmap_page()
{
ASSERT_INTERRUPTS_DISABLED();
auto page_laddr = LinearAddress(4 * MB);
- auto pte = ensurePTE(m_kernel_page_directory, page_laddr);
+ auto pte = ensure_pte(m_kernel_page_directory, page_laddr);
#ifdef MM_DEBUG
auto old_physical_address = pte.physicalPageBase();
#endif
- pte.setPhysicalPageBase(0);
- pte.setPresent(false);
- pte.setWritable(false);
- pte.setUserAllowed(false);
- flushTLB(page_laddr);
+ pte.set_physical_page_base(0);
+ pte.set_present(false);
+ pte.set_writable(false);
+ pte.set_user_allowed(false);
+ flush_tlb(page_laddr);
#ifdef MM_DEBUG
dbgprintf("MM: >> unquickmap_page L%x =/> P%x\n", page_laddr, old_physical_address);
#endif
@@ -440,18 +440,18 @@ void MemoryManager::remap_region_page(PageDirectory* page_directory, Region& reg
{
InterruptDisabler disabler;
auto page_laddr = region.linearAddress.offset(page_index_in_region * PAGE_SIZE);
- auto pte = ensurePTE(page_directory, page_laddr);
+ auto pte = ensure_pte(page_directory, page_laddr);
auto& physical_page = region.vmo().physical_pages()[page_index_in_region];
ASSERT(physical_page);
- pte.setPhysicalPageBase(physical_page->paddr().get());
- pte.setPresent(true); // FIXME: Maybe we should use the is_readable flag here?
+ pte.set_physical_page_base(physical_page->paddr().get());
+ pte.set_present(true); // FIXME: Maybe we should use the is_readable flag here?
if (region.cow_map.get(page_index_in_region))
- pte.setWritable(false);
+ pte.set_writable(false);
else
- pte.setWritable(region.is_writable);
- pte.setUserAllowed(user_allowed);
+ pte.set_writable(region.is_writable);
+ pte.set_user_allowed(user_allowed);
if (page_directory->is_active())
- flushTLB(page_laddr);
+ flush_tlb(page_laddr);
#ifdef MM_DEBUG
dbgprintf("MM: >> remap_region_page (PD=%x) '%s' L%x => P%x (@%p)\n", page_directory, region.name.characters(), page_laddr.get(), physical_page->paddr().get(), physical_page.ptr());
#endif
@@ -472,23 +472,23 @@ void MemoryManager::map_region_at_address(PageDirectory* page_directory, Region&
#endif
for (size_t i = region.first_page_index(); i <= region.last_page_index(); ++i) {
auto page_laddr = laddr.offset(i * PAGE_SIZE);
- auto pte = ensurePTE(page_directory, page_laddr);
+ auto pte = ensure_pte(page_directory, page_laddr);
auto& physical_page = vmo.physical_pages()[i];
if (physical_page) {
- pte.setPhysicalPageBase(physical_page->paddr().get());
- pte.setPresent(true); // FIXME: Maybe we should use the is_readable flag here?
+ pte.set_physical_page_base(physical_page->paddr().get());
+ pte.set_present(true); // FIXME: Maybe we should use the is_readable flag here?
if (region.cow_map.get(i))
- pte.setWritable(false);
+ pte.set_writable(false);
else
- pte.setWritable(region.is_writable);
+ pte.set_writable(region.is_writable);
} else {
- pte.setPhysicalPageBase(0);
- pte.setPresent(false);
- pte.setWritable(region.is_writable);
+ pte.set_physical_page_base(0);
+ pte.set_present(false);
+ pte.set_writable(region.is_writable);
}
- pte.setUserAllowed(user_allowed);
+ pte.set_user_allowed(user_allowed);
if (page_directory->is_active())
- flushTLB(page_laddr);
+ flush_tlb(page_laddr);
#ifdef MM_DEBUG
dbgprintf("MM: >> map_region_at_address (PD=%x) '%s' L%x => P%x (@%p)\n", page_directory, region.name.characters(), page_laddr, physical_page ? physical_page->paddr().get() : 0, physical_page.ptr());
#endif
@@ -503,13 +503,13 @@ void MemoryManager::unmap_range(PageDirectory* page_directory, LinearAddress lad
size_t numPages = size / PAGE_SIZE;
for (size_t i = 0; i < numPages; ++i) {
auto page_laddr = laddr.offset(i * PAGE_SIZE);
- auto pte = ensurePTE(page_directory, page_laddr);
- pte.setPhysicalPageBase(0);
- pte.setPresent(false);
- pte.setWritable(false);
- pte.setUserAllowed(false);
+ auto pte = ensure_pte(page_directory, page_laddr);
+ pte.set_physical_page_base(0);
+ pte.set_present(false);
+ pte.set_writable(false);
+ pte.set_user_allowed(false);
if (page_directory->is_active())
- flushTLB(page_laddr);
+ flush_tlb(page_laddr);
#ifdef MM_DEBUG
dbgprintf("MM: << unmap_range L%x =/> 0\n", page_laddr);
#endif
@@ -548,18 +548,18 @@ void MemoryManager::remove_kernel_alias_for_region(Region& region, byte* addr)
unmap_range(m_kernel_page_directory, LinearAddress((dword)addr), region.size);
}
-bool MemoryManager::unmapRegion(Process& process, Region& region)
+bool MemoryManager::unmap_region(Process& process, Region& region)
{
InterruptDisabler disabler;
for (size_t i = 0; i < region.page_count(); ++i) {
auto laddr = region.linearAddress.offset(i * PAGE_SIZE);
- auto pte = ensurePTE(process.m_page_directory, laddr);
- pte.setPhysicalPageBase(0);
- pte.setPresent(false);
- pte.setWritable(false);
- pte.setUserAllowed(false);
+ auto pte = ensure_pte(process.m_page_directory, laddr);
+ pte.set_physical_page_base(0);
+ pte.set_present(false);
+ pte.set_writable(false);
+ pte.set_user_allowed(false);
if (process.m_page_directory->is_active())
- flushTLB(laddr);
+ flush_tlb(laddr);
#ifdef MM_DEBUG
auto& physical_page = region.vmo().physical_pages()[region.first_page_index() + i];
dbgprintf("MM: >> Unmapped L%x => P%x <<\n", laddr, physical_page ? physical_page->paddr().get() : 0);
@@ -568,7 +568,7 @@ bool MemoryManager::unmapRegion(Process& process, Region& region)
return true;
}
-bool MemoryManager::mapRegion(Process& process, Region& region)
+bool MemoryManager::map_region(Process& process, Region& region)
{
map_region_at_address(process.m_page_directory, region, region.linearAddress, true);
return true;
@@ -579,12 +579,12 @@ bool MemoryManager::validate_user_read(const Process& process, LinearAddress lad
dword pageDirectoryIndex = (laddr.get() >> 22) & 0x3ff;
dword pageTableIndex = (laddr.get() >> 12) & 0x3ff;
auto pde = PageDirectoryEntry(&process.m_page_directory->entries[pageDirectoryIndex]);
- if (!pde.isPresent())
+ if (!pde.is_present())
return false;
auto pte = PageTableEntry(&pde.pageTableBase()[pageTableIndex]);
- if (!pte.isPresent())
+ if (!pte.is_present())
return false;
- if (!pte.isUserAllowed())
+ if (!pte.is_user_allowed())
return false;
return true;
}
@@ -594,14 +594,14 @@ bool MemoryManager::validate_user_write(const Process& process, LinearAddress la
dword pageDirectoryIndex = (laddr.get() >> 22) & 0x3ff;
dword pageTableIndex = (laddr.get() >> 12) & 0x3ff;
auto pde = PageDirectoryEntry(&process.m_page_directory->entries[pageDirectoryIndex]);
- if (!pde.isPresent())
+ if (!pde.is_present())
return false;
auto pte = PageTableEntry(&pde.pageTableBase()[pageTableIndex]);
- if (!pte.isPresent())
+ if (!pte.is_present())
return false;
- if (!pte.isUserAllowed())
+ if (!pte.is_user_allowed())
return false;
- if (!pte.isWritable())
+ if (!pte.is_writable())
return false;
return true;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 07:18:49 +0000