105 lines
2.3 KiB
C++
105 lines
2.3 KiB
C++
/*
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* \brief L4Re functions needed by L4Linux.
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* \author Stefan Kalkowski
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* \date 2011-04-17
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*/
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/*
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* Copyright (C) 2011-2013 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 General Public License version 2.
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*/
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/* Genode includes */
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#include <base/printf.h>
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#include <base/capability.h>
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#include <os/config.h>
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#include <rm_session/connection.h>
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/* L4lx includes */
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#include <dataspace.h>
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#include <env.h>
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namespace Fiasco {
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#include <l4/re/c/mem_alloc.h>
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}
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using namespace Fiasco;
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static const bool DEBUG = false;
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extern "C" {
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static const unsigned long _chunk_size()
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{
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enum { DEFAULT_CHUNK_SIZE = 16*1024*1024 };
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Genode::Number_of_bytes result = DEFAULT_CHUNK_SIZE;
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try {
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Genode::config()->xml_node().sub_node("ram")
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.attribute("chunk_size")
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.value(&result);
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} catch(...) { }
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return result;
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}
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long l4re_ma_alloc(unsigned long size, l4re_ds_t const mem,
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unsigned long flags)
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{
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static const unsigned long chunk_size = _chunk_size();
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using namespace L4lx;
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if (DEBUG)
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PDBG("size=%lx mem=%lx flags=%lx", size, mem, flags);
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Genode::Dataspace_capability cap;
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if (size > chunk_size) {
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Genode::Rm_connection *rmc = new (Genode::env()->heap())
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Genode::Rm_connection(0, size);
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const unsigned long num_chunks = size / chunk_size;
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const unsigned long remainder = size % chunk_size;
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for (unsigned long i = 0; i < num_chunks; i++) {
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Genode::Dataspace_capability cap =
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Genode::env()->ram_session()->alloc(chunk_size);
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rmc->attach(cap);
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}
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if (remainder > 0) {
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Genode::Dataspace_capability cap =
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Genode::env()->ram_session()->alloc(remainder);
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rmc->attach(cap);
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}
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cap = rmc->dataspace();
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} else {
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cap = Genode::env()->ram_session()->alloc(size);
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}
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Dataspace *ds = new (Genode::env()->heap())
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Dataspace("lx_memory", size, cap, mem);
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Env::env()->dataspaces()->insert(ds);
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return 0;
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}
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long l4re_ma_alloc_align(unsigned long size, l4re_ds_t const mem,
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unsigned long flags, unsigned long align) {
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return l4re_ma_alloc(size, mem, flags); }
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long l4re_ma_free(l4re_ds_t const mem)
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{
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PWRN("%s: Not implemented yet!",__func__);
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return 0;
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}
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}
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