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os: add FlushDataCache

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This commit is contained in:
Michael Scire 2021-10-10 00:33:52 -07:00
parent a595c232b9
commit bc96ebb74c
7 changed files with 150 additions and 19 deletions
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23
libraries/libstratosphere/source/os/impl/os_cache_impl.hpp Normal file
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/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stratosphere.hpp>
#ifdef ATMOSPHERE_OS_HORIZON
#include "os_cache_impl.os.horizon.hpp"
#else
#error "Unknown OS for ThreadManagerImpl"
#endif

54
libraries/libstratosphere/source/os/impl/os_cache_impl.os.horizon.hpp Normal file
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/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stratosphere.hpp>
namespace ams::os::impl {
inline void FlushDataCacheImpl(const void *addr, size_t size) {
#if defined(ATMOSPHERE_ARCH_ARM64)
{
/* Declare helper variables. */
uintptr_t cache_type_register = 0;
uintptr_t cache_line_size = 0;
const uintptr_t end_addr = reinterpret_cast<uintptr_t>(addr) + size;
/* Get the cache type register. */
__asm__ __volatile__("mrs %[cache_type_register], ctr_el0" : [cache_type_register]"=r"(cache_type_register));
/* Calculate cache line size. */
cache_line_size = 4 << ((cache_type_register >> 16) & 0xF);
/* Iterate, flushing cache lines. */
for (uintptr_t cur = reinterpret_cast<uintptr_t>(addr) & ~(cache_line_size - 1); cur < end_addr; cur += cache_line_size) {
__asm__ __volatile__ ("dc civac, %[cur]" :: [cur]"r"(cur));
}
/* Insert a memory barrier, now that memory has been flushed. */
__asm__ __volatile__("dsb sy" ::: "memory");
}
#else
const auto result = svc::FlushProcessDataCache(svc::PseudoHandle::CurrentProcess, reinterpret_cast<uintptr_t>(addr), size);
R_ASSERT(result);
AMS_UNUSED(result);
#endif
}
inline void FlushEntireDataCacheImpl() {
svc::FlushEntireDataCache();
}
}

29
libraries/libstratosphere/source/os/os_cache.cpp Normal file
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/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
#include "impl/os_cache_impl.hpp"
namespace ams::os {
void FlushDataCache(const void *addr, size_t size) {
return impl::FlushDataCacheImpl(addr, size);
}
void FlushEntireDataCache() {
return impl::FlushEntireDataCacheImpl();
}
}