64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
/*
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* \brief Allocator for core-local memory
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* \author Norman Feske
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* \date 2009-10-12
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*/
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/*
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* Copyright (C) 2009-2013 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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/* local includes */
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#include <core_mem_alloc.h>
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#include <util.h>
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using namespace Genode;
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static const bool verbose_core_mem_alloc = false;
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bool Core_mem_allocator::Mapped_mem_allocator::alloc(size_t size, void **out_addr)
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{
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/* try to allocate block in cores already mapped virtual address ranges */
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if (_alloc.alloc(size, out_addr))
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return true;
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/* there is no sufficient space in core's mapped virtual memory, expansion needed */
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size_t page_rounded_size = (size + get_page_size() - 1) & get_page_mask();
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void *phys_addr = 0, *virt_addr = 0;
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/* allocate physical pages */
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if (!_phys_alloc->alloc(page_rounded_size, &phys_addr)) {
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PERR("Could not allocate physical memory region of size %zd\n", page_rounded_size);
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return false;
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}
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/* allocate range in core's virtual address space */
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if (!_virt_alloc->alloc(page_rounded_size, &virt_addr)) {
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PERR("Could not allocate virtual address range in core of size %zd\n", page_rounded_size);
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/* revert physical allocation */
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_phys_alloc->free(phys_addr);
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return false;
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}
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if (verbose_core_mem_alloc)
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printf("added core memory block of %zd bytes at virt=%p phys=%p\n",
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page_rounded_size, virt_addr, phys_addr);
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/* make physical page accessible at the designated virtual address */
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_map_local((addr_t)virt_addr, (addr_t)phys_addr, get_page_size_log2());
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/* add new range to core's allocator for mapped virtual memory */
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_alloc.add_range((addr_t)virt_addr, page_rounded_size);
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/* now that we have added enough memory, try again... */
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return _alloc.alloc(size, out_addr);
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}
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