331 lines
6.9 KiB
C++
331 lines
6.9 KiB
C++
/*
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* \brief Basic Genode types
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* \author Martin Stein
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* \author Stefan Kalkowski
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* \date 2012-01-02
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*/
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/*
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* Copyright (C) 2012-2013 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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#ifndef _BASE__NATIVE_TYPES_H_
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#define _BASE__NATIVE_TYPES_H_
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/* Genode includes */
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#include <kernel/interface.h>
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#include <base/native_capability.h>
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#include <base/stdint.h>
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#include <util/string.h>
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/* base-hw includes */
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#include <kernel/log.h>
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namespace Genode
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{
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class Platform_thread;
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class Tlb;
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typedef unsigned Native_thread_id;
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struct Native_thread
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{
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Platform_thread * platform_thread;
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Native_thread_id thread_id;
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};
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typedef int Native_connection_state;
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/* FIXME needs to be MMU dependent */
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enum { MIN_MAPPING_SIZE_LOG2 = 12 };
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/**
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* Return kernel thread-name of the caller
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*/
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Native_thread_id thread_get_my_native_id();
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/**
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* Return an invalid kernel thread-name
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*/
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inline Native_thread_id thread_invalid_id() { return 0; }
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/**
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* Data bunch with variable size that is communicated between threads
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*
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* \param MAX_SIZE maximum size the object is allowed to take
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*/
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template <size_t MAX_SIZE>
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struct Message_tpl;
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/**
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* Information that a thread creator hands out to a new thread
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*/
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class Start_info;
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/**
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* Info that a core-thread creator hands out to Platform_thread::start
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*/
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class Core_start_info;
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/**
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* Memory region that is exclusive to every thread and known by the kernel
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*/
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class Native_utcb;
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struct Cap_dst_policy
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{
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typedef Native_thread_id Dst;
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/**
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* Validate capability destination
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*/
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static bool valid(Dst pt) { return pt != 0; }
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/**
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* Get invalid capability destination
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*/
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static Dst invalid() { return 0; }
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/**
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* Copy capability 'src' to a given memory destination 'dst'
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*/
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static void
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copy(void * dst, Native_capability_tpl<Cap_dst_policy> * src);
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};
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typedef Native_capability_tpl<Cap_dst_policy> Native_capability;
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/**
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* Coherent address region
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*/
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struct Native_region
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{
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addr_t base;
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size_t size;
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};
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struct Native_config
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{
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/**
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* Thread-context area configuration.
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*/
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static constexpr addr_t context_area_virtual_base() {
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return 0x40000000UL; }
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static constexpr addr_t context_area_virtual_size() {
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return 0x10000000UL; }
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/**
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* Size of virtual address region holding the context of one thread
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*/
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static constexpr addr_t context_virtual_size() { return 0x00100000UL; }
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};
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struct Native_pd_args { };
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}
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template <Genode::size_t MAX_SIZE>
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class Genode::Message_tpl
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{
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private:
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size_t _data_size;
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uint8_t _data[];
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/**
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* Return size of payload-preceding meta data
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*/
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size_t _header_size() const { return (addr_t)_data - (addr_t)this; }
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/**
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* Return maximum payload size
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*/
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size_t _max_data_size() const { return MAX_SIZE - _header_size(); }
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/**
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* Return size of header and current payload
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*/
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size_t _size() const { return _header_size() + _data_size; }
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public:
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/**
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* Get properties of receive buffer
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*
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* \return buf_base base of receive buffer
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* \return buf_size size of receive buffer
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*/
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void buffer_info(void * & buf_base, size_t & buf_size) const
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{
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buf_base = (void *)this;
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buf_size = MAX_SIZE;
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}
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/**
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* Get properties of request message and receive buffer
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*
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* \return buf_base base of receive buffer and request message
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* \return buf_size size of receive buffer
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* \return msg_size size of request message
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*/
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void request_info(void * & buf_base, size_t & buf_size,
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size_t & msg_size) const
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{
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buf_base = (void *)this;
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buf_size = MAX_SIZE;
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msg_size = _size();
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}
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/**
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* Get properties of reply message
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*
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* \return msg_base base of reply message
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* \return msg_size size of reply message
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*/
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void reply_info(void * & msg_base, size_t & msg_size) const
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{
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msg_base = (void *)this;
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msg_size = _size();
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}
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/**
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* Install message that shall be send
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*
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* \param data base of payload
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* \param data_size size of payload
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* \param name local name that shall be the first payload word
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*/
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void prepare_send(void * const data, size_t data_size,
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unsigned const name)
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{
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/* limit data size */
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if (data_size > _max_data_size()) {
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Kernel::log() << "oversized message outgoing\n";
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data_size = _max_data_size();
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}
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/* copy data */
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*(unsigned *)_data = name;
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void * const data_dst = (void *)((addr_t)_data + sizeof(name));
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void * const data_src = (void *)((addr_t)data + sizeof(name));
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memcpy(data_dst, data_src, data_size - sizeof(name));
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_data_size = data_size;
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}
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/**
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* Read out message that was received
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*
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* \param buf_base base of read buffer
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* \param buf_size size of read buffer
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*/
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void finish_receive(void * const buf_base, size_t const buf_size)
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{
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/* limit data size */
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if (_data_size > buf_size) {
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Kernel::log() << "oversized message incoming\n";
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_data_size = buf_size;
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}
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/* copy data */
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memcpy(buf_base, _data, _data_size);
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}
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};
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class Genode::Start_info
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{
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private:
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Native_thread_id _thread_id;
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Native_capability _utcb_ds;
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public:
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/**
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* Set-up valid startup message
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*
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* \param thread_id kernel name of the thread that is started
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*/
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void init(Native_thread_id const thread_id,
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Native_capability const & utcb_ds)
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{
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_thread_id = thread_id;
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_utcb_ds = utcb_ds;
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}
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/***************
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** Accessors **
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***************/
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Native_thread_id thread_id() const { return _thread_id; }
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Native_capability utcb_ds() const { return _utcb_ds; }
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};
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class Genode::Core_start_info
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{
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private:
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unsigned _processor_id;
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public:
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/**
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* Set-up valid core startup-message
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*
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* \param processor_id kernel name of the processor to start on
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*/
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void init(unsigned const processor_id)
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{
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_processor_id = processor_id;
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}
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/***************
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** Accessors **
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***************/
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unsigned processor_id() const { return _processor_id; }
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};
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class Genode::Native_utcb
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{
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private:
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uint8_t _data[1 << MIN_MAPPING_SIZE_LOG2];
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public:
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typedef Message_tpl<sizeof(_data)/sizeof(_data[0])> Message;
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/***************
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** Accessors **
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***************/
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Message * message() const { return (Message *)_data; }
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Start_info * start_info() const { return (Start_info *)_data; }
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Core_start_info * core_start_info() const
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{
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return (Core_start_info *)_data;
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}
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size_t size() const { return sizeof(_data)/sizeof(_data[0]); }
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void * base() const { return (void *)_data; }
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};
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namespace Genode
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{
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static constexpr addr_t VIRT_ADDR_SPACE_START = 0x1000;
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static constexpr size_t VIRT_ADDR_SPACE_SIZE = 0xfffef000;
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static constexpr Native_utcb * UTCB_MAIN_THREAD = (Native_utcb *)
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((VIRT_ADDR_SPACE_START + VIRT_ADDR_SPACE_SIZE - sizeof(Native_utcb))
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& ~((1 << MIN_MAPPING_SIZE_LOG2) - 1));
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}
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#endif /* _BASE__NATIVE_TYPES_H_ */
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