a396fa9563
before we had 256 capabilities Issue #2044
127 lines
2.7 KiB
C++
127 lines
2.7 KiB
C++
/*
|
|
* \brief Protection-domain facility
|
|
* \author Norman Feske
|
|
* \date 2015-05-01
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2015 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
#ifndef _CORE__INCLUDE__PLATFORM_PD_H_
|
|
#define _CORE__INCLUDE__PLATFORM_PD_H_
|
|
|
|
/* Genode includes */
|
|
#include <base/allocator.h>
|
|
|
|
/* core includes */
|
|
#include <platform_thread.h>
|
|
#include <address_space.h>
|
|
#include <vm_space.h>
|
|
|
|
/* base-internal includes */
|
|
#include <base/internal/capability_space_sel4.h>
|
|
|
|
namespace Genode { class Platform_pd; }
|
|
|
|
|
|
class Genode::Platform_pd : public Address_space
|
|
{
|
|
private:
|
|
|
|
unsigned const _id; /* used as index in top-level CNode */
|
|
|
|
Page_table_registry _page_table_registry;
|
|
|
|
Cap_sel const _page_directory_sel;
|
|
addr_t _init_page_directory();
|
|
addr_t const _page_directory = _init_page_directory();
|
|
|
|
Vm_space _vm_space;
|
|
|
|
Cnode _cspace_cnode_1st;
|
|
|
|
Lazy_volatile_object<Cnode> _cspace_cnode_2nd[1UL << CSPACE_SIZE_LOG2_1ST];
|
|
|
|
Native_capability _parent;
|
|
|
|
/*
|
|
* Allocator for core-managed selectors within the PD's CSpace
|
|
*/
|
|
struct Sel_alloc : Bit_allocator<1 << NUM_CORE_MANAGED_SEL_LOG2>
|
|
{
|
|
Sel_alloc() { _reserve(0, INITIAL_SEL_END); }
|
|
};
|
|
|
|
Sel_alloc _sel_alloc;
|
|
Lock _sel_alloc_lock;
|
|
|
|
public:
|
|
|
|
/**
|
|
* Constructors
|
|
*/
|
|
Platform_pd(Allocator * md_alloc, char const *,
|
|
signed pd_id = -1, bool create = true);
|
|
|
|
/**
|
|
* Destructor
|
|
*/
|
|
~Platform_pd();
|
|
|
|
/**
|
|
* Bind thread to protection domain
|
|
*/
|
|
bool bind_thread(Platform_thread *thread);
|
|
|
|
/**
|
|
* Unbind thread from protection domain
|
|
*
|
|
* Free the thread's slot and update thread object.
|
|
*/
|
|
void unbind_thread(Platform_thread *thread);
|
|
|
|
/**
|
|
* Assign parent interface to protection domain
|
|
*/
|
|
void assign_parent(Native_capability parent);
|
|
|
|
|
|
/*****************************
|
|
** Address-space interface **
|
|
*****************************/
|
|
|
|
void flush(addr_t, size_t);
|
|
|
|
|
|
/*****************************
|
|
** seL4-specific interface **
|
|
*****************************/
|
|
|
|
Cap_sel alloc_sel();
|
|
|
|
void free_sel(Cap_sel sel);
|
|
|
|
Cnode &cspace_cnode(Cap_sel sel)
|
|
{
|
|
const unsigned index = sel.value() / (1 << CSPACE_SIZE_LOG2_2ND);
|
|
ASSERT(index < sizeof(_cspace_cnode_2nd) /
|
|
sizeof(_cspace_cnode_2nd[0]));
|
|
|
|
return *_cspace_cnode_2nd[index];
|
|
}
|
|
|
|
Cnode &cspace_cnode_1st() { return _cspace_cnode_1st; }
|
|
|
|
Cap_sel page_directory_sel() const { return _page_directory_sel; }
|
|
|
|
size_t cspace_size_log2() { return CSPACE_SIZE_LOG2; }
|
|
|
|
void install_mapping(Mapping const &mapping);
|
|
};
|
|
|
|
#endif /* _CORE__INCLUDE__PLATFORM_PD_H_ */
|