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kern: improve resource region size definitions/calculations

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This commit is contained in:
Michael Scire 2020-08-17 16:45:41 -07:00 • committed by SciresM
parent 79201428b0
commit 1a262c1063
7 changed files with 52 additions and 47 deletions
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23
mesosphere/kernel/source/arch/arm64/init/kern_init_core.cpp
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@ -31,31 +31,12 @@ namespace ams::kern::init {
namespace {
constexpr size_t KernelResourceRegionSize = 0x1728000;
constexpr size_t ExtraKernelResourceSize = 0x68000;
static_assert(ExtraKernelResourceSize + KernelResourceRegionSize == 0x1790000);
constexpr size_t KernelResourceReduction_10_0_0 = 0x10000;
/* Global Allocator. */
KInitialPageAllocator g_initial_page_allocator;
/* Global initial arguments array. */
KPhysicalAddress g_init_arguments_phys_addr[cpu::NumCores];
size_t GetResourceRegionSize() {
/* Decide if Kernel should have enlarged resource region. */
const bool use_extra_resources = KSystemControl::Init::ShouldIncreaseThreadResourceLimit();
size_t resource_region_size = KernelResourceRegionSize + (use_extra_resources ? ExtraKernelResourceSize : 0);
static_assert(KernelResourceRegionSize > InitialProcessBinarySizeMax);
static_assert(KernelResourceRegionSize + ExtraKernelResourceSize > InitialProcessBinarySizeMax);
/* 10.0.0 reduced the kernel resource region size by 64K. */
if (kern::GetTargetFirmware() >= ams::TargetFirmware_10_0_0) {
resource_region_size -= KernelResourceReduction_10_0_0;
}
return resource_region_size;
}
/* Page table attributes. */
constexpr PageTableEntry KernelRoDataAttribute(PageTableEntry::Permission_KernelR, PageTableEntry::PageAttribute_NormalMemory, PageTableEntry::Shareable_InnerShareable, PageTableEntry::MappingFlag_Mapped);
constexpr PageTableEntry KernelRwDataAttribute(PageTableEntry::Permission_KernelRW, PageTableEntry::PageAttribute_NormalMemory, PageTableEntry::Shareable_InnerShareable, PageTableEntry::MappingFlag_Mapped);
@ -152,8 +133,8 @@ namespace ams::kern::init {
const KVirtualAddress stack_region_start = KMemoryLayout::GetVirtualMemoryRegionTree().GetRandomAlignedRegion(StackRegionSize, StackRegionAlign, KMemoryRegionType_Kernel);
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(stack_region_start), StackRegionSize, KMemoryRegionType_KernelStack));
/* Decide if Kernel should have enlarged resource region (slab region + page table heap region). */
const size_t resource_region_size = GetResourceRegionSize();
/* Determine the size of the resource region. */
const size_t resource_region_size = KMemoryLayout::GetResourceRegionSizeForInit();
/* Determine the size of the slab region. */
const size_t slab_region_size = util::AlignUp(CalculateTotalSlabHeapSize(), PageSize);