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kern: switch memset to optimized impl
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parent
9ddb4194b3
commit
7352d87b20
5 changed files with 25 additions and 17 deletions
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@ -23,6 +23,17 @@
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namespace ams::kern::arch::arm64::init {
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inline void ClearPhysicalMemory(KPhysicalAddress address, size_t size) {
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MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(size, sizeof(u64)));
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/* This Physical Address -> void * conversion is valid, because this is init page table code. */
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/* The MMU is necessarily not yet turned on, if we are creating an initial page table. */
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volatile u64 *ptr = reinterpret_cast<volatile u64 *>(GetInteger(address));
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for (size_t i = 0; i < size / sizeof(u64); ++i) {
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ptr[i] = 0;
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}
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}
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class KInitialPageTable {
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public:
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class IPageAllocator {
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@ -61,9 +72,7 @@ namespace ams::kern::arch::arm64::init {
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}
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static ALWAYS_INLINE void ClearNewPageTable(KPhysicalAddress address) {
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/* This Physical Address -> void * conversion is valid, because this is page table code. */
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/* The MMU is necessarily not yet turned on, if we are creating an initial page table. */
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std::memset(reinterpret_cast<void *>(GetInteger(address)), 0, PageSize);
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ClearPhysicalMemory(address, PageSize);
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}
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private:
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size_t NOINLINE GetBlockCount(KVirtualAddress virt_addr, size_t size, size_t block_size) {
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@ -705,7 +714,7 @@ namespace ams::kern::arch::arm64::init {
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this->state.next_address += PageSize;
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}
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std::memset(reinterpret_cast<void *>(allocated), 0, PageSize);
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ClearPhysicalMemory(allocated, PageSize);
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return allocated;
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}
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@ -76,11 +76,13 @@ L(set96):
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.p2align 4
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L(set_long):
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stp val, val, [dstin]
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bic dst, dstin, 15
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#if DC_ZVA_THRESHOLD
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cmp count, DC_ZVA_THRESHOLD
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ccmp val, 0, 0, cs
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bic dst, dstin, 15
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b.eq L(zva_64)
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#else
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bic dst, dstin, 15
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#endif
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/* Small-size or non-zero memset does not use DC ZVA. */
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sub count, dstend, dst
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@ -19,6 +19,6 @@
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#define MESOSPHERE_LIBC_MEMCPY_GENERIC 0
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#define MESOSPHERE_LIBC_MEMCMP_GENERIC 0
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#define MESOSPHERE_LIBC_MEMMOVE_GENERIC 0
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#define MESOSPHERE_LIBC_MEMSET_GENERIC 1
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#define MESOSPHERE_LIBC_MEMSET_GENERIC 0
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#define MESOSPHERE_LIBC_STRNCPY_GENERIC 1
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#define MESOSPHERE_LIBC_STRNCMP_GENERIC 1
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#define MESOSPHERE_LIBC_STRNCMP_GENERIC 1
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@ -23,4 +23,4 @@
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#error "Unknown architecture for libc"
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#endif
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#endif
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@ -241,9 +241,6 @@ namespace ams::kern::init::loader {
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RelocateKernelPhysically(base_address, layout);
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/* Validate kernel layout. */
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/* TODO: constexpr 0x1000 definition somewhere. */
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/* In stratosphere, this is os::MemoryPageSize. */
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/* We don't have ams::os, this may go in hw:: or something. */
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const uintptr_t rx_offset = layout->rx_offset;
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const uintptr_t rx_end_offset = layout->rx_end_offset;
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const uintptr_t ro_offset = layout->ro_offset;
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@ -251,12 +248,12 @@ namespace ams::kern::init::loader {
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const uintptr_t rw_offset = layout->rw_offset;
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/* UNUSED: const uintptr_t rw_end_offset = layout->rw_end_offset; */
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const uintptr_t bss_end_offset = layout->bss_end_offset;
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MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(rx_offset, 0x1000));
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MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(rx_end_offset, 0x1000));
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MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(ro_offset, 0x1000));
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MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(ro_end_offset, 0x1000));
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MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(rw_offset, 0x1000));
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MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(bss_end_offset, 0x1000));
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MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(rx_offset, PageSize));
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MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(rx_end_offset, PageSize));
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MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(ro_offset, PageSize));
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MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(ro_end_offset, PageSize));
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MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(rw_offset, PageSize));
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MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(bss_end_offset, PageSize));
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const uintptr_t bss_offset = layout->bss_offset;
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const uintptr_t ini_load_offset = layout->ini_load_offset;
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const uintptr_t dynamic_offset = layout->dynamic_offset;
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