mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-21 09:52:09 +00:00
140 lines
4.5 KiB
C++
140 lines
4.5 KiB
C++
/*
|
|
* 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 <mesosphere.hpp>
|
|
|
|
namespace ams::kern {
|
|
|
|
namespace {
|
|
|
|
constinit KLightLock g_io_pool_lock;
|
|
constinit bool g_pool_used[ams::svc::IoPoolType_Count];
|
|
|
|
struct IoRegionExtents {
|
|
KPhysicalAddress address;
|
|
size_t size;
|
|
};
|
|
|
|
#if defined(ATMOSPHERE_BOARD_NINTENDO_NX)
|
|
|
|
#include "board/nintendo/nx/kern_k_io_pool.board.nintendo_nx.inc"
|
|
|
|
#elif defined(AMS_SVC_IO_POOL_NOT_SUPPORTED)
|
|
|
|
#include "kern_k_io_pool.unsupported.inc"
|
|
|
|
#else
|
|
|
|
#error "Unknown context for IoPoolType!"
|
|
|
|
#endif
|
|
|
|
constexpr bool IsValidIoRegionImpl(ams::svc::IoPoolType pool_type, KPhysicalAddress address, size_t size) {
|
|
/* NOTE: It seems likely this depends on pool type, but this isn't confirmable as of now. */
|
|
MESOSPHERE_UNUSED(pool_type);
|
|
|
|
/* Check if the address/size falls within any allowable extents. */
|
|
for (const auto &extents : g_io_region_extents) {
|
|
if (extents.size != 0 && extents.address <= address && address + size - 1 <= extents.address + extents.size - 1) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
}
|
|
|
|
bool KIoPool::IsValidIoPoolType(ams::svc::IoPoolType pool_type) {
|
|
return IsValidIoPoolTypeImpl(pool_type);
|
|
}
|
|
|
|
Result KIoPool::Initialize(ams::svc::IoPoolType pool_type) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
/* Register the pool type. */
|
|
{
|
|
/* Lock the pool used table. */
|
|
KScopedLightLock lk(g_io_pool_lock);
|
|
|
|
/* Check that the pool isn't already used. */
|
|
R_UNLESS(!g_pool_used[pool_type], svc::ResultBusy());
|
|
|
|
/* Set the pool as used. */
|
|
g_pool_used[pool_type] = true;
|
|
}
|
|
|
|
/* Set our fields. */
|
|
m_pool_type = pool_type;
|
|
m_is_initialized = true;
|
|
|
|
R_SUCCEED();
|
|
}
|
|
|
|
void KIoPool::Finalize() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
/* Lock the pool used table. */
|
|
KScopedLightLock lk(g_io_pool_lock);
|
|
|
|
/* Check that the pool is used. */
|
|
MESOSPHERE_ASSERT(g_pool_used[m_pool_type]);
|
|
|
|
/* Set the pool as unused. */
|
|
g_pool_used[m_pool_type] = false;
|
|
}
|
|
|
|
Result KIoPool::AddIoRegion(KIoRegion *new_region) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
/* Check that the region is allowed. */
|
|
R_UNLESS(IsValidIoRegionImpl(m_pool_type, new_region->GetAddress(), new_region->GetSize()), svc::ResultInvalidMemoryRegion());
|
|
|
|
/* Lock ourselves. */
|
|
KScopedLightLock lk(m_lock);
|
|
|
|
/* Check that the desired range isn't already in our pool. */
|
|
{
|
|
/* Get the lowest region with address >= the new region that's already in our tree. */
|
|
auto lowest_after = m_io_region_tree.nfind_key(new_region->GetAddress());
|
|
if (lowest_after != m_io_region_tree.end()) {
|
|
R_UNLESS(!lowest_after->Overlaps(new_region->GetAddress(), new_region->GetSize()), svc::ResultBusy());
|
|
}
|
|
|
|
/* There is no region with address >= the new region already in our tree, but we also need to check */
|
|
/* for a region with address < the new region already in our tree. */
|
|
if (lowest_after != m_io_region_tree.begin()) {
|
|
auto highest_before = --lowest_after;
|
|
R_UNLESS(!highest_before->Overlaps(new_region->GetAddress(), new_region->GetSize()), svc::ResultBusy());
|
|
}
|
|
}
|
|
|
|
/* Add the region to our pool. */
|
|
m_io_region_tree.insert(*new_region);
|
|
|
|
R_SUCCEED();
|
|
}
|
|
|
|
void KIoPool::RemoveIoRegion(KIoRegion *region) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
/* Lock ourselves. */
|
|
KScopedLightLock lk(m_lock);
|
|
|
|
/* Remove the region from our tree. */
|
|
m_io_region_tree.erase(m_io_region_tree.iterator_to(*region));
|
|
}
|
|
|
|
}
|