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pci_device:: add convenience phys to virt bar method

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This commit is contained in:
Alexander Boettcher 2015-04-24 13:33:10 +02:00 committed by Christian Helmuth
parent 1006571c85
commit c84817dd7b
1 changed files with 20 additions and 0 deletions
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20
repos/os/include/pci_device/pci_device.h
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@ -202,6 +202,26 @@ struct Pci::Device : Platform::Device
unsigned base_class() { return class_code() >> 16; }
unsigned sub_class() { return (class_code() >> 8) & 0xff; }
/**
* Convenience method to translate a PCI physical BAR id to a Genode
* virtual one usable with the io_port and io_mem methods. The virtual id
* is solely valid for the specific BAR type.
*/
Genode::uint8_t phys_bar_to_virt(Genode::uint8_t phys_bar)
{
Genode::uint8_t virt_io_port = 0, virt_io_mem = 0;
for (unsigned i = 0; i < phys_bar; i++) {
Resource::Type type = resource(i).type();
if (type == Resource::Type::IO)
virt_io_port ++;
else if (type == Resource::Type::MEMORY)
virt_io_mem ++;
}
Resource::Type type = resource(phys_bar).type();
return type == Resource::Type::IO ? virt_io_port : virt_io_mem;
}
/*********************
** RPC declaration **