ExternalVendorCode/genode
1
0
Fork 0
mirror of https://github.com/genodelabs/genode.git synced 2025-02-20 17:52:52 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

lx_kit: io_mem_map with write combined support (x86)

Browse Source 
Issue #4450
This commit is contained in:
Alexander Boettcher 2022-03-21 17:16:15 +01:00 committed by Christian Helmuth
parent 6f64917e8f
commit b6c1b7806b
1 changed files with 20 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
repos/dde_linux/src/lib/lx_kit/spec/x86/platform.cc
View File

@ -353,11 +353,28 @@ void *Platform::Device::Mmio::_local_addr()
if (!_attached_ds.constructed()) {
Legacy_platform::Device_client device { _device._device_cap };
uint8_t const id =
device.phys_bar_to_virt((uint8_t)_index.value);
Cache cache = Cache::UNCACHED;
{
uint8_t phys_bar_id = 0;
/* convert virtual bar id into phys bar id */
for (unsigned virt_id = 0, i = 0; i < 6; i++) {
auto const type = device.resource(i).type();
if (type == Legacy_platform::Device::Resource::Type::MEMORY) {
virt_id ++;
phys_bar_id = uint8_t(i);
}
if (virt_id > _index.value)
break;
}
if (device.resource(phys_bar_id).prefetchable())
cache = Cache::WRITE_COMBINED;
}
Io_mem_session_capability io_mem_cap =
device.io_mem(id);
device.io_mem(uint8_t(_index.value), cache);
Io_mem_session_client io_mem_client(io_mem_cap);