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sel4: RAM-session supplements

This commit is contained in:
Norman Feske 2015-05-07 15:53:59 +02:00 committed by Christian Helmuth
parent bf4b260ce1
commit 0a32bc845f
3 changed files with 65 additions and 6 deletions
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34
repos/base-sel4/src/core/core_rm_session.cc
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@ -28,6 +28,36 @@ Core_rm_session::attach(Dataspace_capability ds_cap, size_t size,
Rm_session::Local_addr local_addr,
bool executable)
{
PDBG("not implemented");
return 0;
Object_pool<Dataspace_component>::Guard ds(_ds_ep->lookup_and_lock(ds_cap));
if (!ds)
throw Invalid_dataspace();
if (size == 0)
size = ds->size();
size_t page_rounded_size = (size + get_page_size() - 1) & get_page_mask();
if (use_local_addr) {
PERR("Parameter 'use_local_addr' not supported within core");
return 0;
}
if (offset) {
PERR("Parameter 'offset' not supported within core");
return 0;
}
/* allocate range in core's virtual address space */
void *virt_addr;
if (!platform()->region_alloc()->alloc(page_rounded_size, &virt_addr)) {
PERR("Could not allocate virtual address range in core of size %zd\n",
page_rounded_size);
return false;
}
/* map the dataspace's physical pages to core-local virtual addresses */
size_t num_pages = page_rounded_size >> get_page_size_log2();
map_local(ds->phys_addr(), (addr_t)virt_addr, num_pages);
return virt_addr;
}

6
repos/base-sel4/src/core/include/core_rm_session.h
View File

@ -26,9 +26,13 @@ namespace Genode { class Core_rm_session; }
class Genode::Core_rm_session : public Rm_session
{
private:
Rpc_entrypoint *_ds_ep;
public:
Core_rm_session(Rpc_entrypoint *) { }
Core_rm_session(Rpc_entrypoint *ds_ep): _ds_ep(ds_ep) { }
Local_addr attach(Dataspace_capability ds_cap, size_t size = 0,
off_t offset = 0, bool use_local_addr = false,

31
repos/base-sel4/src/core/ram_session_support.cc
View File

@ -19,14 +19,16 @@
#include <platform.h>
#include <map_local.h>
using namespace Genode;
void Ram_session_component::_export_ram_ds(Dataspace_component *ds)
{
PDBG("not implemented");
size_t const num_pages = ds->size() >> get_page_size_log2();
Untyped_memory::convert_to_page_frames(ds->phys_addr(), num_pages);
}
void Ram_session_component::_revoke_ram_ds(Dataspace_component *ds)
{
PDBG("not implemented");
@ -35,5 +37,28 @@ void Ram_session_component::_revoke_ram_ds(Dataspace_component *ds)
void Ram_session_component::_clear_ds (Dataspace_component *ds)
{
PDBG("not implemented");
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)) {
PERR("could not allocate virtual address range in core of size %zd\n",
page_rounded_size);
return;
}
/* map the dataspace's physical pages to core-local virtual addresses */
size_t num_pages = page_rounded_size >> get_page_size_log2();
map_local(ds->phys_addr(), (addr_t)virt_addr, num_pages);
/* 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 */
unmap_local((addr_t)virt_addr, num_pages);
/* free core's virtual address space */
platform()->region_alloc()->free(virt_addr, page_rounded_size);
}