17c79a9e23
Besides adapting the components to the use of base/log.h, the patch cleans up a few base headers, i.e., it removes unused includes from root/component.h, specifically base/heap.h and ram_session/ram_session.h. Hence, components that relied on the implicit inclusion of those headers have to manually include those headers now. While adjusting the log messages, I repeatedly stumbled over the problem that printing char * arguments is ambiguous. It is unclear whether to print the argument as pointer or null-terminated string. To overcome this problem, the patch introduces a new type 'Cstring' that allows the caller to express that the argument should be handled as null-terminated string. As a nice side effect, with this type in place, the optional len argument of the 'String' class could be removed. Instead of supplying a pair of (char const *, size_t), the constructor accepts a 'Cstring'. This, in turn, clears the way let the 'String' constructor use the new output mechanism to assemble a string from multiple arguments (and thereby getting rid of snprintf within Genode in the near future). To enforce the explicit resolution of the char * ambiguity, the 'char *' overload of the 'print' function is marked as deleted. Issue #1987
68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
/*
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* \brief Export RAM dataspace as shared memory object (dummy)
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* \author Martin Stein
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* \author Stefan Kalkowski
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* \date 2012-02-12
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*
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* TODO: this file is almost identical to
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* base-okl4/src/core/ram_session_support.cc, we should merge them
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*/
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/*
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* Copyright (C) 2012-2013 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/log.h>
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/* core includes */
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#include <ram_session_component.h>
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#include <platform.h>
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#include <map_local.h>
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using namespace Genode;
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void Ram_session_component::_export_ram_ds(Dataspace_component *ds) { }
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void Ram_session_component::_revoke_ram_ds(Dataspace_component *ds) { }
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void Ram_session_component::_clear_ds (Dataspace_component * ds)
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{
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size_t page_rounded_size = (ds->size() + get_page_size() - 1) & get_page_mask();
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/* allocate range in core's virtual address space */
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void *virt_addr;
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if (!platform()->region_alloc()->alloc(page_rounded_size, &virt_addr)) {
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error("could not allocate virtual address range in core of size ",
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page_rounded_size);
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return;
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}
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/* map the dataspace's physical pages to corresponding virtual addresses */
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size_t num_pages = page_rounded_size >> get_page_size_log2();
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if (!map_local(ds->phys_addr(), (addr_t)virt_addr, num_pages)) {
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error("core-local memory mapping failed");
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return;
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}
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/* clear dataspace */
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memset(virt_addr, 0, page_rounded_size);
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/* uncached dataspaces need to be flushed from the data cache */
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if (ds->cacheability() != CACHED)
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Kernel::update_data_region((addr_t)virt_addr, page_rounded_size);
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/* invalidate the dataspace memory from instruction cache */
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Kernel::update_instr_region((addr_t)virt_addr, page_rounded_size);
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/* unmap dataspace from core */
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if (!unmap_local((addr_t)virt_addr, num_pages))
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error("could not unmap core-local address range at ", virt_addr);
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/* free core's virtual address space */
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platform()->region_alloc()->free(virt_addr, page_rounded_size);
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}
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