270 lines
7.7 KiB
C++
270 lines
7.7 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) 2006-2013 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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/* 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 <rom_session/connection.h>
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#include <cpu_session/connection.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 <cap_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 <signal_root.h>
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#include <platform_services.h>
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using namespace Genode;
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/* support for cap session component */
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long Cap_session_component::_unique_id_cnt;
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/* pool of provided core services */
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static Service_registry local_services;
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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 * Genode::env() {
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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::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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Service *service = local_services.find(name.string());
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if (service)
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return service->session(args.string(), affinity);
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PWRN("service_name=\"%s\" arg=\"%s\" not handled", name.string(), args.string());
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return Session_capability();
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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 = 8*1024 };
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Service_registry &_local_services;
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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(Dataspace_capability elf_ds, Cap_session *cap_session,
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Ram_session_capability ram, Cpu_session_capability cpu,
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Rm_session_capability rm, Service_registry &services)
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:
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_entrypoint(cap_session, STACK_SIZE, "init", false),
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_local_services(services),
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_child(elf_ds, ram, cpu, rm, &_entrypoint, this,
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*_local_services.find(Ram_session::service_name()),
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*_local_services.find(Cpu_session::service_name()),
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*_local_services.find(Rm_session::service_name()))
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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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void filter_session_args(const char *, char *args,
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Genode::size_t args_len)
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{
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using namespace Genode;
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char label_buf[Parent::Session_args::MAX_SIZE];
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Arg_string::find_arg(args, "label").string(label_buf, sizeof(label_buf), "");
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char value_buf[Parent::Session_args::MAX_SIZE];
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Genode::snprintf(value_buf, sizeof(value_buf),
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"\"%s%s%s\"",
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"init",
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Genode::strcmp(label_buf, "") == 0 ? "" : " -> ",
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label_buf);
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Arg_string::set_arg(args, args_len, "label", value_buf);
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}
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const char *name() const { return "init"; }
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Service *resolve_session_request(const char *service, const char *)
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{
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return _local_services.find(service);
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}
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};
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/***************
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** Core main **
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***************/
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int main()
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{
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PDBG("--- create local services ---");
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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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/*
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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()->ram_session(), env()->rm_session());
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static Cap_root cap_root (e, &sliced_heap);
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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, e, e, &sliced_heap, core_env()->cap_session(),
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platform()->vm_start(), platform()->vm_size());
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static Cpu_root cpu_root (e, e, rm_root.pager_ep(), &sliced_heap);
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static Pd_root pd_root (e, e, &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()->cap_session(),
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platform()->irq_alloc(), &sliced_heap);
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static Signal_root signal_root (&sliced_heap, core_env()->cap_session());
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/*
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* Play our role as parent of init and declare our services.
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*/
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static Local_service ls[] = {
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Local_service(Rom_session::service_name(), &rom_root),
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Local_service(Ram_session::service_name(), &ram_root),
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Local_service(Cap_session::service_name(), &cap_root),
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Local_service(Rm_session::service_name(), &rm_root),
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Local_service(Cpu_session::service_name(), &cpu_root),
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Local_service(Pd_session::service_name(), &pd_root),
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Local_service(Log_session::service_name(), &log_root),
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Local_service(Io_mem_session::service_name(), &io_mem_root),
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Local_service(Irq_session::service_name(), &irq_root),
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Local_service(Signal_session::service_name(), &signal_root)
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};
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/* make our local services known to service pool */
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for (unsigned i = 0; i < sizeof(ls) / sizeof(Local_service); i++)
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local_services.insert(&ls[i]);
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/* make platform-specific services known to service pool */
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platform_add_local_services(e, &sliced_heap, &local_services);
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PDBG("--- start init ---");
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/* obtain ROM session with init binary */
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Rom_session_capability init_rom_session_cap;
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try {
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static Rom_connection rom("init");
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init_rom_session_cap = rom.cap(); }
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catch (...) {
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PERR("ROM module \"init\" not present"); }
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/* create ram session for init and transfer some of our own quota */
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Ram_session_capability init_ram_session_cap
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= static_cap_cast<Ram_session>(ram_root.session("ram_quota=32K", Affinity()));
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Ram_session_client(init_ram_session_cap).ref_account(env()->ram_session_cap());
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Cpu_connection init_cpu("init");
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Rm_connection init_rm;
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/* transfer all left memory to init, but leave some memory left for core */
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/* NOTE: exception objects thrown in core components are currently allocated on
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core's heap and not accounted by the component's meta data allocator */
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Genode::size_t init_quota = platform()->ram_alloc()->avail() - 172*1024;
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env()->ram_session()->transfer_quota(init_ram_session_cap, init_quota);
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PDBG("transferred %zd MB to init", init_quota / (1024*1024));
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Core_child *init = new (env()->heap())
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Core_child(Rom_session_client(init_rom_session_cap).dataspace(),
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core_env()->cap_session(), init_ram_session_cap,
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init_cpu.cap(), init_rm.cap(), local_services);
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PDBG("--- init created, waiting for exit condition ---");
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platform()->wait_for_exit();
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PDBG("--- destroying init ---");
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destroy(env()->heap(), init);
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rom_root.close(init_rom_session_cap);
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ram_root.close(init_ram_session_cap);
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PDBG("--- core main says good bye ---");
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return 0;
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}
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