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kernel: transfer_memory: Properly reserve and reset memory region.

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bunnei
2020-01-30 22:39:07 -05:00
parent 7a547b9342
commit ba53543da6
5 changed files with 116 additions and 40 deletions
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60
src/core/hle/kernel/vm_manager.h
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@ -98,6 +98,8 @@ enum class MemoryAttribute : u32 {
DeviceMapped = 4,
/// Uncached memory
Uncached = 8,
IpcAndDeviceMapped = LockedForIPC | DeviceMapped,
};
constexpr MemoryAttribute operator|(MemoryAttribute lhs, MemoryAttribute rhs) {
@ -654,6 +656,35 @@ public:
/// is scheduled.
Common::PageTable page_table{Memory::PAGE_BITS};
using CheckResults = ResultVal<std::tuple<MemoryState, VMAPermission, MemoryAttribute>>;
/// Checks if an address range adheres to the specified states provided.
///
/// @param address The starting address of the address range.
/// @param size The size of the address range.
/// @param state_mask The memory state mask.
/// @param state The state to compare the individual VMA states against,
/// which is done in the form of: (vma.state & state_mask) != state.
/// @param permission_mask The memory permissions mask.
/// @param permissions The permission to compare the individual VMA permissions against,
/// which is done in the form of:
/// (vma.permission & permission_mask) != permission.
/// @param attribute_mask The memory attribute mask.
/// @param attribute The memory attributes to compare the individual VMA attributes
/// against, which is done in the form of:
/// (vma.attributes & attribute_mask) != attribute.
/// @param ignore_mask The memory attributes to ignore during the check.
///
/// @returns If successful, returns a tuple containing the memory attributes
/// (with ignored bits specified by ignore_mask unset), memory permissions, and
/// memory state across the memory range.
/// @returns If not successful, returns ERR_INVALID_ADDRESS_STATE.
///
CheckResults CheckRangeState(VAddr address, u64 size, MemoryState state_mask, MemoryState state,
VMAPermission permission_mask, VMAPermission permissions,
MemoryAttribute attribute_mask, MemoryAttribute attribute,
MemoryAttribute ignore_mask) const;
private:
using VMAIter = VMAMap::iterator;
@ -707,35 +738,6 @@ private:
/// Clears out the page table
void ClearPageTable();
using CheckResults = ResultVal<std::tuple<MemoryState, VMAPermission, MemoryAttribute>>;
/// Checks if an address range adheres to the specified states provided.
///
/// @param address The starting address of the address range.
/// @param size The size of the address range.
/// @param state_mask The memory state mask.
/// @param state The state to compare the individual VMA states against,
/// which is done in the form of: (vma.state & state_mask) != state.
/// @param permission_mask The memory permissions mask.
/// @param permissions The permission to compare the individual VMA permissions against,
/// which is done in the form of:
/// (vma.permission & permission_mask) != permission.
/// @param attribute_mask The memory attribute mask.
/// @param attribute The memory attributes to compare the individual VMA attributes
/// against, which is done in the form of:
/// (vma.attributes & attribute_mask) != attribute.
/// @param ignore_mask The memory attributes to ignore during the check.
///
/// @returns If successful, returns a tuple containing the memory attributes
/// (with ignored bits specified by ignore_mask unset), memory permissions, and
/// memory state across the memory range.
/// @returns If not successful, returns ERR_INVALID_ADDRESS_STATE.
///
CheckResults CheckRangeState(VAddr address, u64 size, MemoryState state_mask, MemoryState state,
VMAPermission permission_mask, VMAPermission permissions,
MemoryAttribute attribute_mask, MemoryAttribute attribute,
MemoryAttribute ignore_mask) const;
/// Gets the amount of memory currently mapped (state != Unmapped) in a range.
ResultVal<std::size_t> SizeOfAllocatedVMAsInRange(VAddr address, std::size_t size) const;