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kern: implement KMemoryBlockManager init

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This commit is contained in:
Michael Scire 2020-02-10 01:50:23 -08:00
parent fdd7b1db15
commit 3c78bc4dbf
6 changed files with 176 additions and 4 deletions
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42
libraries/libmesosphere/include/mesosphere/kern_k_memory_block.hpp
View file

@ -176,12 +176,54 @@ namespace ams::kern {
KMemoryPermission perm;
KMemoryPermission original_perm;
KMemoryAttribute attribute;
public:
static constexpr ALWAYS_INLINE int Compare(const KMemoryBlock &lhs, const KMemoryBlock &rhs) {
if (lhs.GetAddress() < rhs.GetAddress()) {
return -1;
} else if (lhs.GetAddress() <= rhs.GetLastAddress()) {
return 0;
} else {
return 1;
}
}
public:
constexpr KProcessAddress GetAddress() const {
return this->address;
}
constexpr size_t GetNumPages() const {
return this->num_pages;
}
constexpr size_t GetSize() const {
return this->GetNumPages() * PageSize;
}
constexpr KProcessAddress GetEndAddress() const {
return this->GetAddress() + this->GetSize();
}
constexpr KProcessAddress GetLastAddress() const {
return this->GetEndAddress() - 1;
}
public:
constexpr KMemoryBlock()
: address(), num_pages(), memory_state(KMemoryState_None), ipc_lock_count(), device_use_count(), perm(), original_perm(), attribute()
{
/* ... */
}
constexpr void Initialize(KProcessAddress addr, size_t np, KMemoryState ms, KMemoryPermission p, KMemoryAttribute attr) {
MESOSPHERE_ASSERT_THIS();
this->address = addr;
this->num_pages = np;
this->memory_state = ms;
this->ipc_lock_count = 0;
this->device_use_count = 0;
this->perm = p;
this->original_perm = KMemoryPermission_None;
this->attribute = attr;
}
};
}

50
libraries/libmesosphere/include/mesosphere/kern_k_memory_block_manager.hpp Normal file
View file

@ -0,0 +1,50 @@
/*
* Copyright (c) 2018-2020 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 <mesosphere/kern_common.hpp>
#include <mesosphere/kern_k_memory_block.hpp>
#include <mesosphere/kern_k_page_table_manager.hpp>
namespace ams::kern {
class KMemoryBlockManager {
public:
using MemoryBlockTree = util::IntrusiveRedBlackTreeBaseTraits<KMemoryBlock>::TreeType<KMemoryBlock>;
private:
MemoryBlockTree memory_block_tree;
KProcessAddress start;
KProcessAddress end;
public:
constexpr KMemoryBlockManager() : memory_block_tree(), start(), end() { /* ... */ }
Result Initialize(KProcessAddress st, KProcessAddress nd, KMemoryBlockSlabManager *slab_manager);
void Finalize(KMemoryBlockSlabManager *slab_manager);
/* Debug. */
bool CheckState() const;
void DumpBlocks() const;
};
class KScopedMemoryBlockManagerVerifier {
private:
KMemoryBlockManager *manager;
public:
explicit ALWAYS_INLINE KScopedMemoryBlockManagerVerifier(KMemoryBlockManager *m) : manager(m) { MESOSPHERE_AUDIT(this->manager->CheckState()); }
explicit ALWAYS_INLINE KScopedMemoryBlockManagerVerifier(KMemoryBlockManager &m) : KScopedMemoryBlockManagerVerifier(std::addressof(m)) { /* ... */ }
ALWAYS_INLINE ~KScopedMemoryBlockManagerVerifier() { MESOSPHERE_AUDIT(this->manager->CheckState()); }
};
}

5
libraries/libmesosphere/include/mesosphere/kern_k_page_table_base.hpp
View file

@ -20,6 +20,7 @@
#include <mesosphere/kern_k_page_group.hpp>
#include <mesosphere/kern_k_memory_manager.hpp>
#include <mesosphere/kern_k_memory_layout.hpp>
#include <mesosphere/kern_k_memory_block_manager.hpp>
namespace ams::kern {
@ -54,7 +55,7 @@ namespace ams::kern {
mutable KLightLock general_lock;
mutable KLightLock map_physical_memory_lock;
KPageTableImpl impl;
/* TODO KMemoryBlockManager memory_block_manager; */
KMemoryBlockManager memory_block_manager;
u32 allocate_option;
u32 address_space_size;
bool is_kernel;
@ -72,7 +73,7 @@ namespace ams::kern {
address_space_start(), address_space_end(), heap_region_start(), heap_region_end(), current_heap_end(),
alias_region_start(), alias_region_end(), stack_region_start(), stack_region_end(), kernel_map_region_start(),
kernel_map_region_end(), alias_code_region_start(), alias_code_region_end(), code_region_start(), code_region_end(),
max_heap_size(), max_physical_memory_size(), general_lock(), map_physical_memory_lock(), impl(), /* TODO: memory_block_manager(), */
max_heap_size(), max_physical_memory_size(), general_lock(), map_physical_memory_lock(), impl(), memory_block_manager(),
allocate_option(), address_space_size(), is_kernel(), enable_aslr(), memory_block_slab_manager(), block_info_manager(),
cached_physical_linear_region(), cached_physical_non_kernel_dram_region(), cached_virtual_managed_pool_dram_region(),
heap_fill_value(), ipc_fill_value(), stack_fill_value()

6
libraries/libmesosphere/include/mesosphere/kern_panic.hpp
View file

@ -52,6 +52,12 @@ namespace ams::kern {
#define MESOSPHERE_ASSERT_THIS()
#endif
#ifdef MESOSPHERE_BUILD_FOR_AUDITING
#define MESOSPHERE_AUDIT(expr) MESOSPHERE_ASSERT(expr)
#else
#define MESOSPHERE_AUDIT(expr) do { static_cast<void>(expr); } while (0)
#endif
#define MESOSPHERE_TODO(arg) ({ constexpr const char *__mesosphere_todo = arg; MESOSPHERE_PANIC("TODO (%s): %s", __PRETTY_FUNCTION__, __mesosphere_todo); })
#define MESOSPHERE_TODO_IMPLEMENT() MESOSPHERE_TODO("Implement")

73
libraries/libmesosphere/source/kern_k_memory_block_manager.cpp Normal file
View file

@ -0,0 +1,73 @@
/*
* Copyright (c) 2018-2020 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 {
Result KMemoryBlockManager::Initialize(KProcessAddress st, KProcessAddress nd, KMemoryBlockSlabManager *slab_manager) {
/* Allocate a block to encapsulate the address space, insert it into the tree. */
KMemoryBlock *start_block = slab_manager->Allocate();
R_UNLESS(start_block != nullptr, svc::ResultOutOfResource());
/* Set our start and end. */
this->start = st;
this->end = nd;
MESOSPHERE_ASSERT(util::IsAligned(GetInteger(this->start), PageSize));
MESOSPHERE_ASSERT(util::IsAligned(GetInteger(this->end), PageSize));
/* Initialize and insert the block. */
start_block->Initialize(this->start, (this->end - this->start) / PageSize, KMemoryState_Free, KMemoryPermission_None, KMemoryAttribute_None);
this->memory_block_tree.insert(*start_block);
return ResultSuccess();
}
void KMemoryBlockManager::Finalize(KMemoryBlockSlabManager *slab_manager) {
/* Erase every block until we have none left. */
auto it = this->memory_block_tree.begin();
while (it != this->memory_block_tree.end()) {
KMemoryBlock *block = std::addressof(*it);
it = this->memory_block_tree.erase(it);
slab_manager->Free(block);
}
MESOSPHERE_ASSERT(this->memory_block_tree.empty());
}
/* Debug. */
bool KMemoryBlockManager::CheckState() const {
/* If we fail, we should dump blocks. */
auto dump_guard = SCOPE_GUARD { this->DumpBlocks(); };
/* Loop over every block, ensuring that we are sorted and coalesced. */
auto it = this->memory_block_tree.cbegin();
auto prev = it++;
while (it != this->memory_block_tree.cend()) {
MESOSPHERE_TODO("Validate KMemoryBlock Tree");
/* Advance the iterator. */
prev = it++;
}
/* We're valid, so no need to print. */
dump_guard.Cancel();
return true;
}
void KMemoryBlockManager::DumpBlocks() const {
MESOSPHERE_TODO("Dump useful debugging information");
}
}

4
libraries/libmesosphere/source/kern_k_page_table_base.cpp
View file

@ -58,13 +58,13 @@ namespace ams::kern {
this->impl.InitializeForKernel(table, start, end);
/* Initialize our memory block manager. */
MESOSPHERE_TODO("R_TRY(this->memory_block_manager.Initialize(this->address_space_start, this->address_space_end, this->GetMemoryBlockSlabManager()));");
return this->memory_block_manager.Initialize(this->address_space_start, this->address_space_end, this->memory_block_slab_manager);
return ResultSuccess();
}
void KPageTableBase::Finalize() {
MESOSPHERE_TODO("this->memory_block_manager.Finalize(this->GetMemoryBlockSlabManager());");
this->memory_block_manager.Finalize(this->memory_block_slab_manager);
MESOSPHERE_TODO("cpu::InvalidateEntireInstructionCache();");
}
}