131 lines
3.4 KiB
C++
131 lines
3.4 KiB
C++
/*
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* \brief Utilities for creating seL4 kernel objects
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* \author Norman Feske
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* \date 2015-05-08
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*/
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/*
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* Copyright (C) 2015-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _CORE__INCLUDE__KERNEL_OBJECT_H_
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#define _CORE__INCLUDE__KERNEL_OBJECT_H_
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/* Genode includes */
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#include <base/exception.h>
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/* core includes */
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#include <untyped_memory.h>
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#include <initial_untyped_pool.h>
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namespace Genode {
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/**
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* Index referring to a slot in a CNode
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*/
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struct Cnode_index : Cap_sel
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{
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explicit Cnode_index(addr_t value) : Cap_sel(value) { }
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Cnode_index(Cap_sel sel) : Cap_sel(sel.value()) { }
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};
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struct Tcb_kobj
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{
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enum { SEL4_TYPE = seL4_TCBObject, SIZE_LOG2 = 12 };
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static char const *name() { return "TCB"; }
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};
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struct Endpoint_kobj
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{
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enum { SEL4_TYPE = seL4_EndpointObject, SIZE_LOG2 = 4 };
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static char const *name() { return "endpoint"; }
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};
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struct Notification_kobj
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{
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enum { SEL4_TYPE = seL4_NotificationObject, SIZE_LOG2 = 4 };
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static char const *name() { return "notification"; }
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};
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struct Cnode_kobj
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{
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enum { SEL4_TYPE = seL4_CapTableObject, SIZE_LOG2 = 4 };
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static char const *name() { return "cnode"; }
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};
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struct Page_table_kobj
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{
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enum { SEL4_TYPE = seL4_X86_PageTableObject, SIZE_LOG2 = 12 };
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static char const *name() { return "page table"; }
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};
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struct Page_directory_kobj
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{
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enum { SEL4_TYPE = seL4_X86_PageDirectoryObject, SIZE_LOG2 = 12 };
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static char const *name() { return "page directory"; }
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};
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struct Retype_untyped_failed : Genode::Exception { };
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/**
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* Create kernel object
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*
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* \param KOBJ kernel-object description
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* \param service cap to untyped memory
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* \param dst_cnode_sel CNode selector where to store the cap pointing to
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* the new kernel object
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* \param dst_idx designated index of cap selector within 'dst_cnode'
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* \param size_log2 size of kernel object in bits
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*
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* \throw Phys_alloc_failed
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* \throw Retype_untyped_failed
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*
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* The kernel-object description is a policy type that contains enum
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* definitions for 'SEL4_TYPE' and 'SIZE_LOG2', and a static function
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* 'name' that returns the type name as a char const pointer.
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*/
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template <typename KOBJ>
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static void create(seL4_Untyped const service,
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Cap_sel const dst_cnode_sel,
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Cnode_index dst_idx,
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size_t size_log2 = 0)
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{
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int const type = KOBJ::SEL4_TYPE;
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int const size_bits = size_log2;
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seL4_CNode const root = dst_cnode_sel.value();
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int const node_index = 0;
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int const node_depth = 0;
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int const node_offset = dst_idx.value();
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int const num_objects = 1;
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int const ret = seL4_Untyped_Retype(service,
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type,
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size_bits,
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root,
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node_index,
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node_depth,
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node_offset,
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num_objects);
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if (ret != 0) {
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error("seL4_Untyped_RetypeAtOffset (", KOBJ::name(), ") "
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"returned ", ret);
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throw Retype_untyped_failed();
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}
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}
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};
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#endif /* _CORE__INCLUDE__KERNEL_OBJECT_H_ */
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