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https://github.com/Atmosphere-NX/Atmosphere.git
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89 lines
3.1 KiB
C++
89 lines
3.1 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <mesosphere.hpp>
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namespace ams::kern::arm64::cpu {
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/* Declare prototype to be implemented in asm. */
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void SynchronizeAllCoresImpl(s32 *sync_var, s32 num_cores);
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namespace {
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/* Expose this as a global, for asm to use. */
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s32 g_all_core_sync_count;
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void FlushEntireDataCacheImpl(int level) {
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/* Used in multiple locations. */
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const u64 level_sel_value = static_cast<u64>(level << 1);
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/* Set selection register. */
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cpu::SetCsselrEl1(level_sel_value);
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cpu::InstructionMemoryBarrier();
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/* Get cache size id info. */
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CacheSizeIdRegisterAccessor ccsidr_el1;
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const int num_sets = ccsidr_el1.GetNumberOfSets();
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const int num_ways = ccsidr_el1.GetAssociativity();
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const int line_size = ccsidr_el1.GetLineSize();
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const u64 way_shift = static_cast<u64>(__builtin_clz(num_ways));
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const u64 set_shift = static_cast<u64>(line_size + 4);
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for (int way = 0; way <= num_ways; way++) {
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for (int set = 0; set <= num_sets; set++) {
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const u64 way_value = static_cast<u64>(way) << way_shift;
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const u64 set_value = static_cast<u64>(set) << set_shift;
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const u64 cisw_value = way_value | set_value | level_sel_value;
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__asm__ __volatile__("dc cisw, %0" ::"r"(cisw_value) : "memory");
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}
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}
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}
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ALWAYS_INLINE void SetEventLocally() {
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__asm__ __volatile__("sevl" ::: "memory");
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}
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ALWAYS_INLINE void WaitForEvent() {
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__asm__ __volatile__("wfe" ::: "memory");
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}
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}
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void FlushEntireDataCacheShared() {
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CacheLineIdRegisterAccessor clidr_el1;
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const int levels_of_coherency = clidr_el1.GetLevelsOfCoherency();
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const int levels_of_unification = clidr_el1.GetLevelsOfUnification();
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for (int level = levels_of_coherency; level >= levels_of_unification; level--) {
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FlushEntireDataCacheImpl(level);
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}
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}
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void FlushEntireDataCacheLocal() {
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CacheLineIdRegisterAccessor clidr_el1;
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const int levels_of_unification = clidr_el1.GetLevelsOfUnification();
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for (int level = levels_of_unification - 1; level >= 0; level--) {
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FlushEntireDataCacheImpl(level);
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}
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}
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NOINLINE void SynchronizeAllCores() {
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SynchronizeAllCoresImpl(&g_all_core_sync_count, static_cast<s32>(cpu::NumCores));
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}
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}
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