mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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96f95b9f95
* result: try out some experimental shenanigans * result: sketch out some more shenanigans * result: see what it looks like to convert kernel to use result conds instead of guards * make rest of kernel use experimental new macro-ing
129 lines
3.8 KiB
C++
129 lines
3.8 KiB
C++
/*
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* Copyright (c) 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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namespace {
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constinit KLightLock g_io_pool_lock;
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constinit bool g_pool_used[ams::svc::IoPoolType_Count];
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struct IoRegionExtents {
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KPhysicalAddress address;
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size_t size;
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};
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#if defined(ATMOSPHERE_BOARD_NINTENDO_NX)
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#include "board/nintendo/nx/kern_k_io_pool.board.nintendo_nx.inc"
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#elif defined(AMS_SVC_IO_POOL_NOT_SUPPORTED)
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#include "kern_k_io_pool.unsupported.inc"
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#else
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#error "Unknown context for IoPoolType!"
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#endif
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constexpr bool IsValidIoRegionImpl(ams::svc::IoPoolType pool_type, KPhysicalAddress address, size_t size) {
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/* NOTE: It seems likely this depends on pool type, but this isn't confirmable as of now. */
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MESOSPHERE_UNUSED(pool_type);
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/* Check if the address/size falls within any allowable extents. */
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for (const auto &extents : g_io_region_extents) {
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if (extents.address <= address && address + size - 1 <= extents.address + extents.size - 1) {
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return true;
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}
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}
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return false;
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}
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}
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bool KIoPool::IsValidIoPoolType(ams::svc::IoPoolType pool_type) {
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return IsValidIoPoolTypeImpl(pool_type);
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}
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Result KIoPool::Initialize(ams::svc::IoPoolType pool_type) {
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MESOSPHERE_ASSERT_THIS();
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/* Register the pool type. */
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{
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/* Lock the pool used table. */
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KScopedLightLock lk(g_io_pool_lock);
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/* Check that the pool isn't already used. */
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R_UNLESS(!g_pool_used[pool_type], svc::ResultBusy());
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/* Set the pool as used. */
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g_pool_used[pool_type] = true;
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}
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/* Set our fields. */
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m_pool_type = pool_type;
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m_is_initialized = true;
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R_SUCCEED();
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}
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void KIoPool::Finalize() {
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MESOSPHERE_ASSERT_THIS();
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/* Lock the pool used table. */
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KScopedLightLock lk(g_io_pool_lock);
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/* Check that the pool is used. */
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MESOSPHERE_ASSERT(g_pool_used[m_pool_type]);
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/* Set the pool as unused. */
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g_pool_used[m_pool_type] = false;
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}
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Result KIoPool::AddIoRegion(KIoRegion *new_region) {
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MESOSPHERE_ASSERT_THIS();
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/* Check that the region is allowed. */
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R_UNLESS(IsValidIoRegionImpl(m_pool_type, new_region->GetAddress(), new_region->GetSize()), svc::ResultInvalidMemoryRegion());
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/* Lock ourselves. */
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KScopedLightLock lk(m_lock);
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/* Check that the desired range isn't already in our pool. */
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for (const auto ®ion : m_io_region_list) {
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R_UNLESS(!region.Overlaps(new_region->GetAddress(), new_region->GetSize()), svc::ResultBusy());
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}
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/* Add the region to our pool. */
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m_io_region_list.push_back(*new_region);
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R_SUCCEED();
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}
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void KIoPool::RemoveIoRegion(KIoRegion *region) {
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MESOSPHERE_ASSERT_THIS();
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/* Lock ourselves. */
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KScopedLightLock lk(m_lock);
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/* Remove the region from our list. */
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m_io_region_list.erase(m_io_region_list.iterator_to(*region));
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}
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}
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