mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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100 lines
3.1 KiB
C++
100 lines
3.1 KiB
C++
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/*
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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 {
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Result KIoRegion::Initialize(KIoPool *pool, KPhysicalAddress phys_addr, size_t size, ams::svc::MemoryMapping mapping, ams::svc::MemoryPermission perm) {
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MESOSPHERE_ASSERT_THIS();
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/* Set fields. */
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m_physical_address = phys_addr;
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m_size = size;
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m_mapping = mapping;
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m_perm = perm;
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m_pool = pool;
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m_is_mapped = false;
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/* Add ourselves to our pool. */
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R_TRY(m_pool->AddIoRegion(this));
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/* Open a reference to our pool. */
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m_pool->Open();
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/* Mark ourselves as initialized. */
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m_is_initialized = true;
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return ResultSuccess();
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}
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void KIoRegion::Finalize() {
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/* Remove ourselves from our pool. */
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m_pool->RemoveIoRegion(this);
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/* Close our reference to our pool. */
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m_pool->Close();
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}
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Result KIoRegion::Map(KProcessAddress address, size_t size, ams::svc::MemoryPermission map_perm) {
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MESOSPHERE_ASSERT_THIS();
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/* Check that the desired perm is allowable. */
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R_UNLESS((m_perm | map_perm) == m_perm, svc::ResultInvalidNewMemoryPermission());
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/* Check that the size is correct. */
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R_UNLESS(size == m_size, svc::ResultInvalidSize());
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/* Lock ourselves. */
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KScopedLightLock lk(m_lock);
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/* Check that we're not already mapped. */
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R_UNLESS(!m_is_mapped, svc::ResultInvalidState());
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/* Map ourselves. */
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R_TRY(GetCurrentProcess().GetPageTable().MapIoRegion(address, m_physical_address, size, m_mapping, map_perm));
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/* Add ourselves to the current process. */
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GetCurrentProcess().AddIoRegion(this);
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/* Note that we're mapped. */
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m_is_mapped = true;
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return ResultSuccess();
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}
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Result KIoRegion::Unmap(KProcessAddress address, size_t size) {
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MESOSPHERE_ASSERT_THIS();
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/* Check that the size is correct. */
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R_UNLESS(size == m_size, svc::ResultInvalidSize());
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/* Lock ourselves. */
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KScopedLightLock lk(m_lock);
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/* Unmap ourselves. */
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R_TRY(GetCurrentProcess().GetPageTable().UnmapIoRegion(address, m_physical_address, size));
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/* Remove ourselves from the current process. */
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GetCurrentProcess().RemoveIoRegion(this);
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/* Note that we're unmapped. */
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m_is_mapped = false;
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return ResultSuccess();
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}
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}
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