226 lines
5.7 KiB
C++
226 lines
5.7 KiB
C++
/*
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* \brief VMM cpu object
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* \author Stefan Kalkowski
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* \date 2019-07-18
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*/
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/*
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* Copyright (C) 2019 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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#ifndef _SRC__SERVER__VMM__CPU_BASE_H_
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#define _SRC__SERVER__VMM__CPU_BASE_H_
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#include <exception.h>
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#include <generic_timer.h>
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#include <base/env.h>
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#include <base/heap.h>
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#include <cpu/vm_state_virtualization.h>
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#include <util/mmio.h>
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#include <vm_session/connection.h>
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namespace Vmm {
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class Vm;
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class Cpu_base;
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Genode::Lock & lock();
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}
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class Vmm::Cpu_base
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{
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public:
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struct State : Genode::Vm_state
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{
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Genode::uint64_t reg(unsigned idx) const;
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void reg(unsigned idx, Genode::uint64_t v);
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};
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struct Esr : Genode::Register<32>
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{
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struct Ec : Bitfield<26, 6>
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{
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enum {
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WFI = 0x1,
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MRC_MCR = 0x3,
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HVC = 0x16,
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MRS_MSR = 0x18,
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DA = 0x24,
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BRK = 0x3c
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};
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};
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};
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Cpu_base(Vm & vm,
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Genode::Vm_connection & vm_session,
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Mmio_bus & bus,
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Gic & gic,
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Genode::Env & env,
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Genode::Heap & heap,
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Genode::Entrypoint & ep);
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unsigned cpu_id() const;
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void run();
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void pause();
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bool active() const;
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State & state() const;
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Gic::Gicd_banked & gic();
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void dump();
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void handle_exception();
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void recall();
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void initialize_boot(Genode::addr_t ip,
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Genode::addr_t dtb);
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template <typename FUNC>
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void handle_signal(FUNC handler)
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{
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if (active()) {
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pause();
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handle_exception();
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}
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handler();
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_update_state();
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if (active()) run();
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}
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template <typename T>
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struct Signal_handler : Genode::Vm_handler<Signal_handler<T>>
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{
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using Base = Genode::Vm_handler<Signal_handler<T>>;
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Cpu_base & cpu;
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T & obj;
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void (T::*member)();
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void handle()
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{
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try {
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cpu.handle_signal([this] () { (obj.*member)(); });
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} catch(Exception &e) {
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Genode::error(e);
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cpu.dump();
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}
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}
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Signal_handler(Cpu_base & cpu,
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Genode::Entrypoint & ep,
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T & o,
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void (T::*f)())
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: Base(ep, *this, &Signal_handler::handle),
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cpu(cpu), obj(o), member(f) {}
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};
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protected:
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class System_register : public Genode::Avl_node<System_register>
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{
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private:
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const Esr::access_t _encoding;
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const char *_name;
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const bool _writeable;
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Genode::uint64_t _value;
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public:
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struct Iss : Esr
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{
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struct Direction : Bitfield<0, 1> {};
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struct Crm : Bitfield<1, 4> {};
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struct Register : Bitfield<5, 5> {};
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struct Crn : Bitfield<10, 4> {};
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struct Opcode1 : Bitfield<14, 3> {};
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struct Opcode2 : Bitfield<17, 3> {};
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struct Opcode0 : Bitfield<20, 2> {};
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static access_t value(unsigned op0,
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unsigned crn,
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unsigned op1,
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unsigned crm,
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unsigned op2);
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static access_t mask_encoding(access_t v);
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};
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System_register(unsigned op0,
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unsigned crn,
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unsigned op1,
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unsigned crm,
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unsigned op2,
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const char * name,
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bool writeable,
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Genode::addr_t v,
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Genode::Avl_tree<System_register> & tree);
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System_register(unsigned crn,
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unsigned op1,
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unsigned crm,
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unsigned op2,
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const char * name,
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bool writeable,
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Genode::addr_t v,
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Genode::Avl_tree<System_register> & tree)
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: System_register(0, crn, op1, crm, op2,
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name, writeable, v, tree) {}
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const char * name() const { return _name; }
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const bool writeable() const { return _writeable; }
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System_register * find_by_encoding(Iss::access_t e)
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{
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if (e == _encoding) return this;
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System_register * r =
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Avl_node<System_register>::child(e > _encoding);
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return r ? r->find_by_encoding(e) : nullptr;
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}
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virtual void write(Genode::addr_t v) {
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_value = (Genode::addr_t)v; }
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virtual Genode::addr_t read() const {
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return (Genode::addr_t)(_value); }
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/************************
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** Avl node interface **
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************************/
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bool higher(System_register *r) {
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return (r->_encoding > _encoding); }
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};
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bool _active { true };
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Vm & _vm;
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Genode::Vm_connection & _vm_session;
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Genode::Heap & _heap;
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Signal_handler<Cpu_base> _vm_handler;
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Genode::Vm_session::Vcpu_id _vcpu_id;
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State & _state;
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Genode::Avl_tree<System_register> _reg_tree;
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/***********************
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** Local peripherals **
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***********************/
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Gic::Gicd_banked _gic;
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Generic_timer _timer;
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void _handle_nothing() {}
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bool _handle_sys_reg();
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void _handle_brk();
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void _handle_wfi();
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void _handle_sync();
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void _handle_irq();
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void _handle_data_abort();
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void _handle_hyper_call();
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void _update_state();
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};
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#endif /* _SRC__SERVER__VMM__CPU_BASE_H_ */
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