114 lines
3.1 KiB
C++
114 lines
3.1 KiB
C++
/*
|
|
* \brief I/O MEM dataspace utility
|
|
* \author Norman Feske
|
|
* \date 2011-05-19
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2011-2017 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU Affero General Public License version 3.
|
|
*/
|
|
|
|
#ifndef _INCLUDE__BASE__ATTACHED_IO_MEM_DATASPACE_H_
|
|
#define _INCLUDE__BASE__ATTACHED_IO_MEM_DATASPACE_H_
|
|
|
|
#include <io_mem_session/connection.h>
|
|
#include <base/env.h>
|
|
|
|
namespace Genode { class Attached_io_mem_dataspace; }
|
|
|
|
|
|
/**
|
|
* Request and locally attach a memory-mapped I/O resource
|
|
*
|
|
* This class is a wrapper for a typical sequence of operations performed
|
|
* by device drivers to access memory-mapped device resources. Its sole
|
|
* purpose is to avoid duplicated code.
|
|
*/
|
|
class Genode::Attached_io_mem_dataspace
|
|
{
|
|
private:
|
|
|
|
/*
|
|
* Noncopyable
|
|
*/
|
|
Attached_io_mem_dataspace(Attached_io_mem_dataspace const &);
|
|
Attached_io_mem_dataspace &operator = (Attached_io_mem_dataspace const &);
|
|
|
|
Region_map &_env_rm;
|
|
Io_mem_connection _mmio;
|
|
Io_mem_dataspace_capability _ds;
|
|
void *_local_addr;
|
|
|
|
public:
|
|
|
|
/**
|
|
* Constructor
|
|
*
|
|
* \param base base address of memory-mapped I/O resource
|
|
* \param size size of resource
|
|
* \param write_combined enable write combining for the resource
|
|
*
|
|
* \throw Service_denied
|
|
* \throw Insufficient_ram_quota
|
|
* \throw Insufficient_cap_quota
|
|
* \throw Out_of_ram
|
|
* \throw Out_of_caps
|
|
* \throw Region_map::Region_conflict
|
|
* \throw Region_map::Invalid_dataspace
|
|
*/
|
|
Attached_io_mem_dataspace(Env &env, Genode::addr_t base, Genode::size_t size,
|
|
bool write_combined = false)
|
|
:
|
|
_env_rm(env.rm()),
|
|
_mmio(env, base, size, write_combined),
|
|
_ds(_mmio.dataspace()),
|
|
_local_addr(env.rm().attach(_ds))
|
|
{
|
|
/* apply sub-page offset to virtual address */
|
|
_local_addr = (void *)((addr_t)_local_addr | (base & (addr_t)0xfff));
|
|
}
|
|
|
|
/**
|
|
* Constructor
|
|
*
|
|
* \noapi
|
|
* \deprecated Use the constructor with 'Env &' as first
|
|
* argument instead
|
|
*/
|
|
Attached_io_mem_dataspace(Genode::addr_t base, Genode::size_t size,
|
|
bool write_combined = false) __attribute__((deprecated))
|
|
:
|
|
_env_rm(*env_deprecated()->rm_session()),
|
|
_mmio(false, base, size, write_combined),
|
|
_ds(_mmio.dataspace()),
|
|
_local_addr(_env_rm.attach(_ds))
|
|
{
|
|
/* apply sub-page offset to virtual address */
|
|
_local_addr = (void *)((addr_t)_local_addr | (base & (addr_t)0xfff));
|
|
}
|
|
|
|
/**
|
|
* Destructor
|
|
*/
|
|
~Attached_io_mem_dataspace() { _env_rm.detach(_local_addr); }
|
|
|
|
/**
|
|
* Return capability of the used RAM dataspace
|
|
*/
|
|
Io_mem_dataspace_capability cap() { return _ds; }
|
|
|
|
/**
|
|
* Request local address
|
|
*
|
|
* This is a template to avoid inconvenient casts at the caller.
|
|
* A newly allocated I/O MEM dataspace is untyped memory anyway.
|
|
*/
|
|
template <typename T>
|
|
T *local_addr() { return static_cast<T *>(_local_addr); }
|
|
};
|
|
|
|
#endif /* _INCLUDE__BASE__ATTACHED_IO_MEM_DATASPACE_H_ */
|