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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/common.h"
#include "core/mem_map.h"
#include "core/hle/kernel/shared_memory.h"
namespace Kernel {
class SharedMemory : public Object {
public:
std::string GetTypeName() const override { return "SharedMemory"; }
static Kernel::HandleType GetStaticHandleType() { return Kernel::HandleType::SharedMemory; }
Kernel::HandleType GetHandleType() const override { return Kernel::HandleType::SharedMemory; }
u32 base_address; ///< Address of shared memory block in RAM
MemoryPermission permissions; ///< Permissions of shared memory block (SVC field)
MemoryPermission other_permissions; ///< Other permissions of shared memory block (SVC field)
std::string name; ///< Name of shared memory object (optional)
};
////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* Creates a shared memory object
* @param handle Handle of newly created shared memory object
* @param name Name of shared memory object
* @return Pointer to newly created shared memory object
*/
SharedMemory* CreateSharedMemory(Handle& handle, const std::string& name) {
SharedMemory* shared_memory = new SharedMemory;
handle = Kernel::g_object_pool.Create(shared_memory);
shared_memory->name = name;
return shared_memory;
}
Handle CreateSharedMemory(const std::string& name) {
Handle handle;
CreateSharedMemory(handle, name);
return handle;
}
/**
* Maps a shared memory block to an address in system memory
* @param handle Shared memory block handle
* @param address Address in system memory to map shared memory block to
* @param permissions Memory block map permissions (specified by SVC field)
* @param other_permissions Memory block map other permissions (specified by SVC field)
* @return Result of operation, 0 on success, otherwise error code
*/
ResultCode MapSharedMemory(u32 handle, u32 address, MemoryPermission permissions,
MemoryPermission other_permissions) {
if (address < Memory::SHARED_MEMORY_VADDR || address >= Memory::SHARED_MEMORY_VADDR_END) {
LOG_ERROR(Kernel_SVC, "cannot map handle=0x%08X, address=0x%08X outside of shared mem bounds!",
handle, address);
return ResultCode(ErrorDescription::InvalidAddress, ErrorModule::Kernel,
ErrorSummary::InvalidArgument, ErrorLevel::Permanent);
}
SharedMemory* shared_memory = Kernel::g_object_pool.Get<SharedMemory>(handle);
if (shared_memory == nullptr) return InvalidHandle(ErrorModule::Kernel);
shared_memory->base_address = address;
shared_memory->permissions = permissions;
shared_memory->other_permissions = other_permissions;
return RESULT_SUCCESS;
}
ResultVal<u8*> GetSharedMemoryPointer(Handle handle, u32 offset) {
SharedMemory* shared_memory = Kernel::g_object_pool.Get<SharedMemory>(handle);
if (shared_memory == nullptr) return InvalidHandle(ErrorModule::Kernel);
if (0 != shared_memory->base_address)
return MakeResult<u8*>(Memory::GetPointer(shared_memory->base_address + offset));
LOG_ERROR(Kernel_SVC, "memory block handle=0x%08X not mapped!", handle);
// TODO(yuriks): Verify error code.
return ResultCode(ErrorDescription::InvalidAddress, ErrorModule::Kernel,
ErrorSummary::InvalidState, ErrorLevel::Permanent);
}
} // namespace
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