b32af4e0a4
Instead of handing over object ids to the kernel, which has to find them in object pools then, core can simply use object pointers to reference kernel objects. Ref #1443
108 lines
2.8 KiB
C++
108 lines
2.8 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 2015-02-17
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*/
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/*
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* Copyright (C) 2015 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/construct_at.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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void Vm_session_component::exception_handler(Signal_context_capability handler)
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{
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if (_initialized) {
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PWRN("Cannot initialize kernel vm object twice!");
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return;
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}
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Core_mem_allocator * cma =
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static_cast<Core_mem_allocator*>(platform()->core_mem_alloc());
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if (Kernel::new_vm(&_vm, (void*)_ds.core_local_addr(), handler.dst(),
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cma->phys_addr(_table))) {
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PWRN("Cannot instantiate vm kernel object, invalid signal context?");
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return;
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}
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_initialized = true;
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}
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void Vm_session_component::_attach(addr_t phys_addr, addr_t vm_addr, size_t size)
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{
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Page_flags pflags = Page_flags::apply_mapping(true, CACHED, false);
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try {
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for (;;)
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try {
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_table->insert_translation(vm_addr, phys_addr, size, pflags, _pslab);
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return;
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} catch(Page_slab::Out_of_slabs) {
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_pslab->alloc_slab_block();
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}
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} catch(Allocator::Out_of_memory) {
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PERR("Translation table needs to much RAM");
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} catch(...) {
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PERR("Invalid mapping %p -> %p (%zx)", (void*)phys_addr,
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(void*)vm_addr, size);
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}
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}
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void Vm_session_component::attach(Dataspace_capability ds_cap, addr_t vm_addr)
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{
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/* check dataspace validity */
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Object_pool<Dataspace_component>::Guard dsc(_ds_ep->lookup_and_lock(ds_cap));
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if (!dsc) throw Invalid_dataspace();
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_attach(dsc->phys_addr(), vm_addr, dsc->size());
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}
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void Vm_session_component::attach_pic(addr_t vm_addr)
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{
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_attach(Board::IRQ_CONTROLLER_VT_CPU_BASE, vm_addr,
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Board::IRQ_CONTROLLER_VT_CPU_SIZE);
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}
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void Vm_session_component::detach(addr_t vm_addr, size_t size) {
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_table->remove_translation(vm_addr, size, _pslab); }
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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), _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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Core_mem_allocator * cma =
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static_cast<Core_mem_allocator*>(platform()->core_mem_alloc());
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void *tt;
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/* get some aligned space for the translation table */
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if (!cma->alloc_aligned(sizeof(Translation_table), (void**)&tt,
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Translation_table::ALIGNM_LOG2).is_ok()) {
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PERR("failed to allocate kernel object");
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throw Root::Quota_exceeded();
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}
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_table = construct_at<Translation_table>(tt);
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_pslab = new (cma) Page_slab(cma);
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}
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