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kern: switch memset to optimized impl

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Michael Scire 2020-07-29 17:45:23 -07:00 • committed by SciresM
parent 9ddb4194b3
commit 7352d87b20
5 changed files with 25 additions and 17 deletions
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17
libraries/libmesosphere/include/mesosphere/arch/arm64/init/kern_k_init_page_table.hpp
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@ -23,6 +23,17 @@
namespace ams::kern::arch::arm64::init {
inline void ClearPhysicalMemory(KPhysicalAddress address, size_t size) {
MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(size, sizeof(u64)));
/* This Physical Address -> void * conversion is valid, because this is init page table code. */
/* The MMU is necessarily not yet turned on, if we are creating an initial page table. */
volatile u64 *ptr = reinterpret_cast<volatile u64 *>(GetInteger(address));
for (size_t i = 0; i < size / sizeof(u64); ++i) {
ptr[i] = 0;
}
}
class KInitialPageTable {
public:
class IPageAllocator {
@ -61,9 +72,7 @@ namespace ams::kern::arch::arm64::init {
}
static ALWAYS_INLINE void ClearNewPageTable(KPhysicalAddress address) {
/* This Physical Address -> void * conversion is valid, because this is page table code. */
/* The MMU is necessarily not yet turned on, if we are creating an initial page table. */
std::memset(reinterpret_cast<void *>(GetInteger(address)), 0, PageSize);
ClearPhysicalMemory(address, PageSize);
}
private:
size_t NOINLINE GetBlockCount(KVirtualAddress virt_addr, size_t size, size_t block_size) {
@ -705,7 +714,7 @@ namespace ams::kern::arch::arm64::init {
this->state.next_address += PageSize;
}
std::memset(reinterpret_cast<void *>(allocated), 0, PageSize);
ClearPhysicalMemory(allocated, PageSize);
return allocated;
}