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
67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
/*
|
|
* \brief Export RAM dataspace as shared memory object (dummy)
|
|
* \author Norman Feske
|
|
* \date 2006-07-03
|
|
*
|
|
* On L4, each dataspace _is_ a shared memory object.
|
|
* Therefore, these functions are empty.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2006-2013 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.
|
|
*/
|
|
|
|
/* Genode includes */
|
|
#include <base/env.h>
|
|
|
|
/* core includes */
|
|
#include <platform.h>
|
|
#include <map_local.h>
|
|
#include <ram_session_component.h>
|
|
|
|
/* OKL4 includes */
|
|
namespace Okl4 { extern "C" {
|
|
#include <l4/ipc.h> /* needed for 'L4_ErrorCode' */
|
|
} }
|
|
|
|
using namespace Genode;
|
|
|
|
void Ram_session_component::_export_ram_ds(Dataspace_component *ds) { }
|
|
void Ram_session_component::_revoke_ram_ds(Dataspace_component *ds) { }
|
|
|
|
void Ram_session_component::_clear_ds (Dataspace_component *ds)
|
|
{
|
|
size_t page_rounded_size = (ds->size() + get_page_size() - 1) & get_page_mask();
|
|
|
|
/* allocate range in core's virtual address space */
|
|
void *virt_addr;
|
|
if (!platform()->region_alloc()->alloc(page_rounded_size, &virt_addr)) {
|
|
error("could not allocate virtual address range in core of size ",
|
|
page_rounded_size);
|
|
return;
|
|
}
|
|
|
|
/* map the dataspace's physical pages to corresponding virtual addresses */
|
|
size_t num_pages = page_rounded_size >> get_page_size_log2();
|
|
if (!map_local(ds->phys_addr(), (addr_t)virt_addr, num_pages)) {
|
|
error("core-local memory mapping failed, error=", Okl4::L4_ErrorCode());
|
|
return;
|
|
}
|
|
|
|
/* clear dataspace */
|
|
size_t num_longwords = page_rounded_size/sizeof(long);
|
|
for (long *dst = (long *)virt_addr; num_longwords--;)
|
|
*dst++ = 0;
|
|
|
|
/* unmap dataspace from core */
|
|
if (!unmap_local((addr_t)virt_addr, num_pages))
|
|
error("could not unmap core-local address range at ", virt_addr, ", "
|
|
"error=", Okl4::L4_ErrorCode());
|
|
|
|
/* free core's virtual address space */
|
|
platform()->region_alloc()->free(virt_addr, page_rounded_size);
|
|
}
|