96 lines
2.2 KiB
C++
96 lines
2.2 KiB
C++
/*
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* \brief VM session component for 'base-hw'
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* \author Stefan Kalkowski
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* \date 2012-10-08
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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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/* Genode includes */
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#include <util/string.h>
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#include <util/arg_string.h>
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#include <root/root.h>
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#include <cpu/cpu_state.h>
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/* core includes */
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#include <kernel/core_interface.h>
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#include <vm_session_component.h>
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#include <platform.h>
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#include <core_env.h>
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using namespace Genode;
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addr_t Vm_session_component::_alloc_ds(size_t &ram_quota)
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{
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addr_t addr;
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if (_ds_size() > ram_quota ||
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platform()->ram_alloc()->alloc_aligned(_ds_size(), (void**)&addr,
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get_page_size_log2()).is_error())
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throw Root::Quota_exceeded();
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ram_quota -= _ds_size();
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return addr;
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}
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void Vm_session_component::exception_handler(Signal_context_capability handler)
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{
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if (_vm_id) {
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PWRN("Cannot register exception_handler repeatedly");
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return;
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}
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_vm_id = Kernel::new_vm(_vm, (void*)_ds.core_local_addr(), handler.dst());
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}
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void Vm_session_component::run(void)
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{
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if (!_vm_id) {
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PWRN("No exception handler registered!");
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return;
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}
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Kernel::run_vm(_vm_id);
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}
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void Vm_session_component::pause(void)
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{
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if (!_vm_id) {
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PWRN("No exception handler registered!");
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return;
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}
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Kernel::pause_vm(_vm_id);
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}
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Vm_session_component::Vm_session_component(Rpc_entrypoint *ds_ep,
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size_t ram_quota)
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: _ds_ep(ds_ep), _vm_id(0),
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_ds(_ds_size(), _alloc_ds(ram_quota), UNCACHED, true, 0),
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_ds_cap(static_cap_cast<Dataspace>(_ds_ep->manage(&_ds)))
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{
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_ds.assign_core_local_addr(core_env()->rm_session()->attach(_ds_cap));
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/* alloc needed memory */
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if (Kernel::vm_size() > ram_quota ||
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!platform()->core_mem_alloc()->alloc(Kernel::vm_size(), &_vm))
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throw Root::Quota_exceeded();
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}
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Vm_session_component::~Vm_session_component()
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{
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/* dissolve VM dataspace from service entry point */
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_ds_ep->dissolve(&_ds);
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/* free region in allocator */
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core_env()->rm_session()->detach(_ds.core_local_addr());
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platform()->ram_alloc()->free((void*)_ds.phys_addr());
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platform()->core_mem_alloc()->free(_vm);
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}
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