xt-sys/exectos
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Allocate memory for kernel startup stack
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This commit is contained in:
Rafal Kupiec 2023-01-25 16:47:27 +01:00
parent b3bf613e1b
commit c4d53f12f2
Signed by: belliash
GPG Key ID: 4E829243E0CFE6B4
1 changed files with 21 additions and 0 deletions
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21
xtldr/modules/xtos/xtos.c
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@ -184,7 +184,9 @@ XtpBootSequence(IN PEFI_FILE_HANDLE BootDir,
PEFI_LOADED_IMAGE_PROTOCOL ImageProtocol; PEFI_LOADED_IMAGE_PROTOCOL ImageProtocol;
PVOID VirtualAddress, VirtualMemoryArea; PVOID VirtualAddress, VirtualMemoryArea;
PXT_ENTRY_POINT KernelEntryPoint; PXT_ENTRY_POINT KernelEntryPoint;
EFI_PHYSICAL_ADDRESS Address;
LIST_ENTRY MemoryMappings; LIST_ENTRY MemoryMappings;
ULONG KernelStackPages;
EFI_STATUS Status; EFI_STATUS Status;
/* Initialize XTOS startup sequence */ /* Initialize XTOS startup sequence */
@ -236,6 +238,25 @@ XtpBootSequence(IN PEFI_FILE_HANDLE BootDir,
/* Close boot directory handle */ /* Close boot directory handle */
BootDir->Close(BootDir); BootDir->Close(BootDir);
/* Calculate number of pages needed by kernel stack */
KernelStackPages = EFI_SIZE_TO_PAGES(KERNEL_STACK_SIZE);
/* Allocate memory for kernel startup stack */
XtLdrProtocol->DbgPrint(L"Initializing kernel startup stack\n");
Status = EfiSystemTable->BootServices->AllocatePages(AllocateAnyPages, EfiLoaderData, KernelStackPages, &Address);
if(Status != STATUS_EFI_SUCCESS)
{
/* Memory allocation failure */
XtLdrProtocol->DbgPrint(L"Failed to allocate %lu pages for kernel startup stack (Status Code: %lx)\n",
KernelStackPages, Status);
return Status;
}
/* Map kernel startup stack and set next valid virtual address */
XtLdrProtocol->AddVirtualMemoryMapping(&MemoryMappings, VirtualAddress, (PVOID)(UINT_PTR)Address,
KernelStackPages, LoaderStartupKernelStack);
VirtualAddress += (KernelStackPages * EFI_PAGE_SIZE);
/* Enable paging */ /* Enable paging */
EfiSystemTable->BootServices->HandleProtocol(EfiImageHandle, &LoadedImageGuid, (PVOID*)&ImageProtocol); EfiSystemTable->BootServices->HandleProtocol(EfiImageHandle, &LoadedImageGuid, (PVOID*)&ImageProtocol);
Status = XtLdrProtocol->EnablePaging(&MemoryMappings, VirtualAddress, ImageProtocol, &XtPageMap); Status = XtLdrProtocol->EnablePaging(&MemoryMappings, VirtualAddress, ImageProtocol, &XtPageMap);