58f44d39c5
This patch replaces the former use of size_t with the use of the 'Ram_quota' type to improve type safety (in particular to avoid accidentally mixing up RAM quotas with cap quotas). Issue #2398
320 lines
8.8 KiB
C++
320 lines
8.8 KiB
C++
/*
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* \brief Core main program
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* \author Norman Feske
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* \date 2006-07-12
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*/
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/*
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* Copyright (C) 2006-2017 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 Affero General Public License version 3.
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*/
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/* Genode includes */
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#include <base/snprintf.h>
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#include <base/sleep.h>
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#include <base/service.h>
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#include <base/child.h>
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#include <base/log.h>
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#include <rm_session/connection.h>
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#include <pd_session/connection.h>
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#include <rom_session/connection.h>
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#include <cpu_session/connection.h>
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/* base-internal includes */
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#include <base/internal/globals.h>
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/* core includes */
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#include <platform.h>
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#include <core_env.h>
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#include <ram_root.h>
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#include <rom_root.h>
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#include <rm_root.h>
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#include <cpu_root.h>
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#include <pd_root.h>
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#include <log_root.h>
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#include <io_mem_root.h>
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#include <irq_root.h>
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#include <trace/root.h>
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#include <platform_services.h>
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using namespace Genode;
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/***************************************
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** Core environment/platform support **
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***************************************/
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Core_env * Genode::core_env()
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{
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/*
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* Make sure to initialize the platform before constructing the core
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* environment.
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*/
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platform();
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/*
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* By placing the environment as static object here, we ensure that its
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* constructor gets called when this function is used the first time.
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*/
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static Core_env _env;
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return &_env;
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}
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Env_deprecated * Genode::env_deprecated() {
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return core_env(); }
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Platform *Genode::platform_specific()
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{
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static Platform _platform;
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return &_platform;
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}
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Platform_generic *Genode::platform() { return platform_specific(); }
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/*************************
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** Core parent support **
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*************************/
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Session_capability Core_parent::session(Parent::Client::Id id,
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Parent::Service_name const &name,
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Parent::Session_args const &args,
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Affinity const &affinity)
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{
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Session_capability cap;
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_services.for_each([&] (Service &service) {
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if ((service.name() != name.string()) || cap.valid())
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return;
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Session_state &session = *new (_alloc)
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Session_state(service, _id_space, id, label_from_args(args.string()),
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args.string(), affinity);
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service.initiate_request(session);
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cap = session.cap;
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});
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if (!cap.valid())
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error("unexpected core-parent ", name.string(), " session request");
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return cap;
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}
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/****************
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** Core child **
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****************/
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class Core_child : public Child_policy
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{
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private:
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/*
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* Entry point used for serving the parent interface
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*/
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Rpc_entrypoint _entrypoint;
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enum { STACK_SIZE = 4 * 1024 * sizeof(Genode::addr_t)};
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Registry<Service> &_services;
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Capability<Ram_session> _core_ram_cap;
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Ram_session &_core_ram;
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Capability<Cpu_session> _core_cpu_cap;
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Cpu_session &_core_cpu;
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Ram_quota const _ram_quota;
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Child _child;
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public:
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/**
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* Constructor
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*/
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Core_child(Registry<Service> &services, Ram_session &core_ram,
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Capability<Ram_session> core_ram_cap, Ram_quota ram_quota,
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Cpu_session &core_cpu, Capability<Cpu_session> core_cpu_cap)
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:
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_entrypoint(nullptr, STACK_SIZE, "init_child", false),
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_services(services),
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_core_ram_cap(core_ram_cap), _core_ram(core_ram),
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_core_cpu_cap(core_cpu_cap), _core_cpu(core_cpu),
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_ram_quota(Child::effective_quota(ram_quota)),
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_child(*env_deprecated()->rm_session(), _entrypoint, *this)
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{
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_entrypoint.activate();
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}
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/****************************
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** Child-policy interface **
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****************************/
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Name name() const { return "init"; }
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Service &resolve_session_request(Service::Name const &name,
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Session_state::Args const &args) override
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{
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Service *service = nullptr;
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_services.for_each([&] (Service &s) {
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if (!service && s.name() == name)
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service = &s; });
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if (!service)
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throw Parent::Service_denied();
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return *service;
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}
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void init(Ram_session &session, Capability<Ram_session> cap) override
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{
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session.ref_account(_core_ram_cap);
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_core_ram.transfer_quota(cap, _ram_quota);
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}
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void init(Cpu_session &session, Capability<Cpu_session> cap) override
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{
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session.ref_account(_core_cpu_cap);
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_core_cpu.transfer_quota(cap, Cpu_session::quota_lim_upscale(100, 100));
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}
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Ram_session &ref_ram() { return _core_ram; }
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Ram_session_capability ref_ram_cap() const { return _core_ram_cap; }
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size_t session_alloc_batch_size() const override { return 128; }
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};
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/****************
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** Signal API **
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****************/
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/*
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* In contrast to the 'Platform_env' used by non-core components, core disables
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* the signal thread but overriding 'Genode::init_signal_thread' with a dummy.
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* Within core, the signal thread is not needed as core is never supposed to
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* receive any signals. Otherwise, the signal thread would be the only
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* non-entrypoint thread within core, which would be a problem on NOVA where
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* the creation of regular threads within core is unsupported.
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*/
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namespace Genode { void init_signal_thread(Env &) { } }
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/*******************
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** Trace support **
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*******************/
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Trace::Source_registry &Trace::sources()
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{
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static Trace::Source_registry inst;
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return inst;
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}
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/***************
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** Core main **
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***************/
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namespace Genode {
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extern bool inhibit_tracing;
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extern char const *version_string;
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}
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int main()
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{
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/**
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* Disable tracing within core because it is currently not fully implemented.
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*/
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inhibit_tracing = true;
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log("Genode ", Genode::version_string);
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static Trace::Policy_registry trace_policies;
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/*
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* Initialize root interfaces for our services
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*/
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Rpc_entrypoint *e = core_env()->entrypoint();
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Registry<Service> &services = core_env()->services();
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/*
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* Allocate session meta data on distinct dataspaces to enable independent
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* destruction (to enable quota trading) of session component objects.
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*/
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static Sliced_heap sliced_heap(env_deprecated()->ram_session(), env_deprecated()->rm_session());
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/*
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* Factory for creating RPC capabilities within core
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*/
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static Rpc_cap_factory rpc_cap_factory(sliced_heap);
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static Pager_entrypoint pager_ep(rpc_cap_factory);
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static Ram_root ram_root (e, e, platform()->ram_alloc(), &sliced_heap);
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static Rom_root rom_root (e, e, platform()->rom_fs(), &sliced_heap);
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static Rm_root rm_root (e, &sliced_heap, pager_ep);
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static Cpu_root cpu_root (e, e, &pager_ep, &sliced_heap,
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Trace::sources());
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static Pd_root pd_root (e, e, pager_ep, &sliced_heap);
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static Log_root log_root (e, &sliced_heap);
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static Io_mem_root io_mem_root (e, e, platform()->io_mem_alloc(),
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platform()->ram_alloc(), &sliced_heap);
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static Irq_root irq_root (core_env()->pd_session(),
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platform()->irq_alloc(), &sliced_heap);
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static Trace::Root trace_root (e, &sliced_heap, Trace::sources(), trace_policies);
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static Core_service<Rom_session_component> rom_service (services, rom_root);
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static Core_service<Ram_session_component> ram_service (services, ram_root);
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static Core_service<Rm_session_component> rm_service (services, rm_root);
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static Core_service<Cpu_session_component> cpu_service (services, cpu_root);
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static Core_service<Pd_session_component> pd_service (services, pd_root);
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static Core_service<Log_session_component> log_service (services, log_root);
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static Core_service<Io_mem_session_component> io_mem_service (services, io_mem_root);
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static Core_service<Irq_session_component> irq_service (services, irq_root);
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static Core_service<Trace::Session_component> trace_service (services, trace_root);
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/* make platform-specific services known to service pool */
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platform_add_local_services(e, &sliced_heap, &services);
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/* create CPU session representing core */
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static Cpu_session_component
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core_cpu(e, e, &pager_ep, &sliced_heap, Trace::sources(),
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"label=\"core\"", Affinity(), Cpu_session::QUOTA_LIMIT);
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Cpu_session_capability core_cpu_cap = core_env()->entrypoint()->manage(&core_cpu);
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/* calculate RAM to be assigned to init */
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size_t const platform_ram_limit = platform()->ram_alloc()->avail();
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size_t const preserved_ram_quota = 224*1024;
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if (platform_ram_limit < preserved_ram_quota) {
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error("platform RAM limit lower than preservation for core");
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return -1;
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}
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size_t const avail_ram_quota = platform_ram_limit - preserved_ram_quota;
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log("", avail_ram_quota / (1024*1024), " MiB RAM "
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"assigned to init");
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static Reconstructible<Core_child>
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init(services, *env_deprecated()->ram_session(), env_deprecated()->ram_session_cap(),
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Ram_quota{avail_ram_quota}, core_cpu, core_cpu_cap);
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platform()->wait_for_exit();
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init.destruct();
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return 0;
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}
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