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Updated memory initializator

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Alex 2022-11-04 05:28:24 +02:00
parent 691f19841c
commit 359c88150f
Signed by untrusted user who does not match committer: enderice2
GPG Key ID: EACC3AD603BAB4DD
2 changed files with 94 additions and 62 deletions
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152
Core/Memory/Memory.cpp
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@ -10,6 +10,7 @@ using namespace Memory;
Physical KernelAllocator;
PageTable *KernelPageTable = nullptr;
PageTable *UserspaceKernelOnlyPageTable = nullptr;
static MemoryAllocatorType AllocatorType = MemoryAllocatorType::None;
Xalloc::AllocatorV1 *XallocV1Allocator = nullptr;
@ -36,6 +37,80 @@ void tracepagetable(PageTable *pt)
}
#endif
void MapFromZero(PageTable *PT, BootInfo *Info)
{
Virtual va = Virtual(PT);
uint64_t VirtualOffsetNormalVMA = NORMAL_VMA_OFFSET;
for (uint64_t t = 0; t < Info->Memory.Size; t += PAGE_SIZE)
{
va.Map((void *)t, (void *)t, PTFlag::RW);
va.Map((void *)VirtualOffsetNormalVMA, (void *)t, PTFlag::RW);
VirtualOffsetNormalVMA += PAGE_SIZE;
}
}
void MapFramebuffer(PageTable *PT, BootInfo *Info)
{
Virtual va = Virtual(PT);
int itrfb = 0;
while (1)
{
if (!Info->Framebuffer[itrfb].BaseAddress)
break;
for (uint64_t fb_base = (uint64_t)Info->Framebuffer[itrfb].BaseAddress;
fb_base < ((uint64_t)Info->Framebuffer[itrfb].BaseAddress + ((Info->Framebuffer[itrfb].Pitch * Info->Framebuffer[itrfb].Height) + PAGE_SIZE));
fb_base += PAGE_SIZE)
va.Map((void *)(fb_base + NORMAL_VMA_OFFSET), (void *)fb_base, PTFlag::RW | PTFlag::US);
itrfb++;
}
}
void MapKernel(PageTable *PT, BootInfo *Info)
{
/* KernelStart KernelTextEnd KernelRoDataEnd KernelEnd
Kernel Start & Text Start ------ Text End ------ Kernel Rodata End ------ Kernel Data End & Kernel End
*/
Virtual va = Virtual(PT);
uint64_t KernelStart = (uint64_t)&_kernel_start;
uint64_t KernelTextEnd = (uint64_t)&_kernel_text_end;
uint64_t KernelDataEnd = (uint64_t)&_kernel_data_end;
uint64_t KernelRoDataEnd = (uint64_t)&_kernel_rodata_end;
uint64_t KernelEnd = (uint64_t)&_kernel_end;
uint64_t BaseKernelMapAddress = (uint64_t)Info->Kernel.PhysicalBase;
for (uint64_t k = KernelStart; k < KernelTextEnd; k += PAGE_SIZE)
{
va.Map((void *)k, (void *)BaseKernelMapAddress, PTFlag::RW);
KernelAllocator.LockPage((void *)BaseKernelMapAddress);
BaseKernelMapAddress += PAGE_SIZE;
}
for (uint64_t k = KernelTextEnd; k < KernelDataEnd; k += PAGE_SIZE)
{
va.Map((void *)k, (void *)BaseKernelMapAddress, PTFlag::RW);
KernelAllocator.LockPage((void *)BaseKernelMapAddress);
BaseKernelMapAddress += PAGE_SIZE;
}
for (uint64_t k = KernelDataEnd; k < KernelRoDataEnd; k += PAGE_SIZE)
{
va.Map((void *)k, (void *)BaseKernelMapAddress, PTFlag::P);
KernelAllocator.LockPage((void *)BaseKernelMapAddress);
BaseKernelMapAddress += PAGE_SIZE;
}
for (uint64_t k = KernelRoDataEnd; k < KernelEnd; k += PAGE_SIZE)
{
va.Map((void *)k, (void *)BaseKernelMapAddress, PTFlag::RW);
KernelAllocator.LockPage((void *)BaseKernelMapAddress);
BaseKernelMapAddress += PAGE_SIZE;
}
debug("\nStart: %#llx - Text End: %#llx - RoEnd: %#llx - End: %#llx\nStart Physical: %#llx - End Physical: %#llx",
KernelStart, KernelTextEnd, KernelRoDataEnd, KernelEnd, Info->Kernel.PhysicalBase, BaseKernelMapAddress - PAGE_SIZE);
}
void InitializeMemoryManagement(BootInfo *Info)
{
for (uint64_t i = 0; i < Info->Memory.Entries; i++)
@ -93,78 +168,33 @@ void InitializeMemoryManagement(BootInfo *Info)
AllocatorType = MemoryAllocatorType::Pages;
trace("Initializing Virtual Memory Manager");
KernelPageTable = (PageTable *)KernelAllocator.RequestPage();
KernelPageTable = (PageTable *)KernelAllocator.RequestPages(TO_PAGES(PAGE_SIZE));
memset(KernelPageTable, 0, PAGE_SIZE);
Virtual kva = Virtual(KernelPageTable);
uint64_t KernelStart = (uint64_t)&_kernel_start;
uint64_t KernelTextEnd = (uint64_t)&_kernel_text_end;
uint64_t KernelDataEnd = (uint64_t)&_kernel_data_end;
uint64_t KernelRoDataEnd = (uint64_t)&_kernel_rodata_end;
uint64_t KernelEnd = (uint64_t)&_kernel_end;
UserspaceKernelOnlyPageTable = (PageTable *)KernelAllocator.RequestPages(TO_PAGES(PAGE_SIZE));
memset(UserspaceKernelOnlyPageTable, 0, PAGE_SIZE);
uint64_t VirtualOffsetNormalVMA = NORMAL_VMA_OFFSET;
uint64_t BaseKernelMapAddress = (uint64_t)Info->Kernel.PhysicalBase;
for (uint64_t t = 0; t < Info->Memory.Size; t += PAGE_SIZE)
{
kva.Map((void *)t, (void *)t, PTFlag::RW);
kva.Map((void *)VirtualOffsetNormalVMA, (void *)t, PTFlag::RW);
VirtualOffsetNormalVMA += PAGE_SIZE;
}
debug("Mapping from %#llx to %#llx", 0, Info->Memory.Size);
MapFromZero(KernelPageTable, Info);
/* Mapping Framebuffer address */
int itrfb = 0;
while (1)
{
if (!Info->Framebuffer[itrfb].BaseAddress)
break;
for (uint64_t fb_base = (uint64_t)Info->Framebuffer[itrfb].BaseAddress;
fb_base < ((uint64_t)Info->Framebuffer[itrfb].BaseAddress + ((Info->Framebuffer[itrfb].Pitch * Info->Framebuffer[itrfb].Height) + PAGE_SIZE));
fb_base += PAGE_SIZE)
kva.Map((void *)(fb_base + NORMAL_VMA_OFFSET), (void *)fb_base, PTFlag::RW | PTFlag::US);
itrfb++;
}
debug("Mapping Framebuffer");
MapFramebuffer(KernelPageTable, Info);
debug("Mapping Framebuffer for Userspace Page Table");
MapFramebuffer(UserspaceKernelOnlyPageTable, Info);
/* Kernel mapping */
for (uint64_t k = KernelStart; k < KernelTextEnd; k += PAGE_SIZE)
{
kva.Map((void *)k, (void *)BaseKernelMapAddress, PTFlag::RW);
KernelAllocator.LockPage((void *)BaseKernelMapAddress);
BaseKernelMapAddress += PAGE_SIZE;
}
debug("Mapping Kernel");
MapKernel(KernelPageTable, Info);
debug("Mapping Kernel for Userspace Page Table");
MapKernel(UserspaceKernelOnlyPageTable, Info);
for (uint64_t k = KernelTextEnd; k < KernelDataEnd; k += PAGE_SIZE)
{
kva.Map((void *)k, (void *)BaseKernelMapAddress, PTFlag::RW);
KernelAllocator.LockPage((void *)BaseKernelMapAddress);
BaseKernelMapAddress += PAGE_SIZE;
}
for (uint64_t k = KernelDataEnd; k < KernelRoDataEnd; k += PAGE_SIZE)
{
kva.Map((void *)k, (void *)BaseKernelMapAddress, PTFlag::P);
KernelAllocator.LockPage((void *)BaseKernelMapAddress);
BaseKernelMapAddress += PAGE_SIZE;
}
for (uint64_t k = KernelRoDataEnd; k < KernelEnd; k += PAGE_SIZE)
{
kva.Map((void *)k, (void *)BaseKernelMapAddress, PTFlag::RW);
KernelAllocator.LockPage((void *)BaseKernelMapAddress);
BaseKernelMapAddress += PAGE_SIZE;
}
debug("\nStart: %#llx - Text End: %#llx - RoEnd: %#llx - End: %#llx\nStart Physical: %#llx - End Physical: %#llx",
KernelStart, KernelTextEnd, KernelRoDataEnd, KernelEnd, Info->Kernel.PhysicalBase, BaseKernelMapAddress - PAGE_SIZE);
/* KernelStart KernelTextEnd KernelRoDataEnd KernelEnd
Kernel Start & Text Start ------ Text End ------ Kernel Rodata End ------ Kernel Data End & Kernel End
*/
trace("Applying new page table from address %p", KernelPageTable);
#ifdef DEBUG
debug("Kernel:");
tracepagetable(KernelPageTable);
debug("Userspace:");
tracepagetable(UserspaceKernelOnlyPageTable);
#endif
#if defined(__amd64__) || defined(__i386__)
asmv("mov %0, %%cr3" ::"r"(KernelPageTable));

4
include/memory.hpp
View File

@ -393,10 +393,11 @@ namespace Memory
* @brief Check if page is present
*
* @param VirtualAddress Virtual address of the page
* @param Flag Flag to check
* @return true if page is present
* @return false if page is not present
*/
bool Check(void *VirtualAddress);
bool Check(void *VirtualAddress, PTFlag Flag = PTFlag::P);
/**
* @brief Map page.
@ -471,6 +472,7 @@ void operator delete[](void *Pointer, long unsigned int Size);
extern Memory::Physical KernelAllocator;
extern Memory::PageTable *KernelPageTable;
extern Memory::PageTable *UserspaceKernelOnlyPageTable;
#endif // __cplusplus