156 lines
3.6 KiB
C++
156 lines
3.6 KiB
C++
/*
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* \brief Service and session interface
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* \author Sebastian Sumpf <sebastian.sumpf@genode-labs.com>
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* \date 2012-02-25
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*
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* The 'acpi_drv' provides the 'PCI' after rewriting the IRQ information of PCI
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* devices. For this it uses the 'pci_drv' as a client and forwards the session
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* capability of the 'pci_drv' afterwards
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*/
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/*
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* Copyright (C) 2009-2012 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#include <os/slave.h>
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#include <base/printf.h>
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#include <base/env.h>
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#include <base/sleep.h>
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#include <cap_session/connection.h>
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#include <pci_session/client.h>
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#include "acpi.h"
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namespace Pci {
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struct Provider
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{
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bool ready_to_use() { return root().valid(); }
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virtual Genode::Root_capability root() = 0;
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};
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/**
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* Root interface of PCI service
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*/
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class Root : public Genode::Rpc_object<Genode::Typed_root<Pci::Session> >
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{
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private:
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Provider &_pci_provider;
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public:
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Genode::Session_capability session(Session_args const &args)
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{
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if (!args.is_valid_string()) throw Invalid_args();
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if (!_pci_provider.ready_to_use())
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throw Unavailable();
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try {
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return Genode::Root_client(_pci_provider.root()).session(args.string());
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} catch (...) {
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throw Unavailable();
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}
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}
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void upgrade(Genode::Session_capability, Upgrade_args const &) { }
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void close(Genode::Session_capability session)
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{
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Genode::Root_client(_pci_provider.root()).close(session);
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}
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Root(Provider &pci_provider) : _pci_provider(pci_provider) { }
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};
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}
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typedef Genode::Capability<Genode::Typed_root<Pci::Session> > Service_capability;
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class Pci_policy : public Genode::Slave_policy, public Pci::Provider
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{
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private:
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Genode::Root_capability _cap;
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Genode::Rpc_entrypoint &_ep;
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protected:
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char const **_permitted_services() const
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{
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static char const *permitted_services[] = {
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"CAP", "RM", "LOG", "IO_PORT", 0 };
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return permitted_services;
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};
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/**
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* Parse ACPI tables and announce slave PCI service
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*/
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void _acpi_session()
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{
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Pci::Session_capability session;
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const char *args = "ram_quota=4K";
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try {
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using namespace Genode;
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session = static_cap_cast<Pci::Session>(Root_client(_cap).session(args));
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} catch (...) { return; }
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Acpi::rewrite_irq(session);
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/* announce service PCI to parent */
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static Pci::Root pci_root(*this);
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Genode::env()->parent()->announce(_ep.manage(&pci_root));
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Genode::Root_client(_cap).close(session);
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}
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public:
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Pci_policy(Genode::Rpc_entrypoint &slave_ep, Genode::Rpc_entrypoint &ep)
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: Slave_policy("pci_drv", slave_ep), _ep(ep)
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{ }
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bool announce_service(const char *service_name,
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Genode::Root_capability root,
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Genode::Allocator *alloc)
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{
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/* wait for 'pci_drv' to announce the PCI service */
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if (Genode::strcmp(service_name, "PCI"))
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return false;
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_cap = root;
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/* connect session and start ACPI parsing */
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_acpi_session();
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return true;
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}
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Genode::Root_capability root() { return _cap; }
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};
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int main(int argc, char **argv)
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{
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using namespace Genode;
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enum { STACK_SIZE = 2*4096 };
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static Cap_connection cap;
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static Rpc_entrypoint ep(&cap, STACK_SIZE, "acpi_ep");
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/* use 'pci_drv' as slave service */
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static Rpc_entrypoint pci_ep(&cap, STACK_SIZE, "pci_slave");
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static Pci_policy pci_policy(pci_ep, ep);
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static Genode::Slave pci_slave(pci_ep, pci_policy, 512 * 1024);
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Genode::sleep_forever();
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return 0;
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}
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