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Support uncached 'Attached_ram_dataspace'

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The enable the use of 'Attached_ram_dataspace' objects as DMA buffers,
we need to pass the 'cached' flag to the constructor. By default, the
dataspace is cached, which corresponds to the original behaviour.
This commit is contained in:
Norman Feske 2012-07-25 17:49:26 +02:00
parent 847c8cccd9
commit 0ca47e8963
1 changed files with 7 additions and 3 deletions
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10
os/include/os/attached_ram_dataspace.h
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@ -34,6 +34,7 @@ namespace Genode {
Ram_session *_ram_session;
Ram_dataspace_capability _ds;
void *_local_addr;
bool const _cached;
template <typename T>
static void _swap(T &v1, T &v2) { T tmp = v1; v1 = v2; v2 = tmp; }
@ -52,7 +53,7 @@ namespace Genode {
if (!_size || !_ram_session) return;
try {
_ds = _ram_session->alloc(_size);
_ds = _ram_session->alloc(_size, _cached);
_local_addr = env()->rm_session()->attach(_ds);
/* revert allocation if attaching the dataspace failed */
@ -70,8 +71,11 @@ namespace Genode {
* \throw Ram_session::Alloc_failed
* \throw Rm_session::Attach_failed
*/
Attached_ram_dataspace(Ram_session *ram_session, size_t size)
: _size(size), _ram_session(ram_session), _local_addr(0)
Attached_ram_dataspace(Ram_session *ram_session, size_t size,
bool cached = true)
:
_size(size), _ram_session(ram_session), _local_addr(0),
_cached(cached)
{
_alloc_and_attach();
}