174 lines
4.2 KiB
C++
174 lines
4.2 KiB
C++
/*
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* \brief Protection-domain facility
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* \author Martin Stein
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* \author Stefan Kalkowski
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* \author Sebastian Sumpf
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* \date 2012-02-12
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*/
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/*
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* Copyright (C) 2012-2017 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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/* Genode includes */
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#include <root/root.h>
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/* core includes */
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#include <hw/assert.h>
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#include <platform_pd.h>
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#include <platform_thread.h>
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using namespace Genode;
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using Hw::Page_table;
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/**************************************
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** Hw::Address_space implementation **
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**************************************/
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Core_mem_allocator &Hw::Address_space::_cma() {
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return static_cast<Core_mem_allocator &>(platform().core_mem_alloc()); }
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void *Hw::Address_space::_table_alloc()
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{
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void * ret = nullptr;
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if (!_cma().alloc_aligned(sizeof(Page_table), (void**)&ret,
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Page_table::ALIGNM_LOG2).ok())
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throw Insufficient_ram_quota();
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return ret;
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}
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bool Hw::Address_space::insert_translation(addr_t virt, addr_t phys,
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size_t size, Page_flags flags)
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{
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try {
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for (;;) {
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try {
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Lock::Guard guard(_lock);
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_tt.insert_translation(virt, phys, size, flags, _tt_alloc);
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return true;
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} catch(Hw::Out_of_tables &) {
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flush(platform().vm_start(), platform().vm_size());
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}
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}
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} catch(...) {
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error("invalid mapping ", Hex(phys), " -> ", Hex(virt), " (", size, ")");
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}
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return false;
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}
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void Hw::Address_space::flush(addr_t virt, size_t size, Core_local_addr)
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{
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Lock::Guard guard(_lock);
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try {
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_tt.remove_translation(virt, size, _tt_alloc);
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Kernel::invalidate_tlb(*_kobj, virt, size);
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} catch(...) {
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error("tried to remove invalid region!");
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}
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}
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Hw::Address_space::Address_space(Page_table & tt,
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Page_table::Allocator & tt_alloc,
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Platform_pd & pd)
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: _tt(tt),
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_tt_phys(Platform::core_page_table()),
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_tt_alloc(tt_alloc),
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_kobj(false, *(Page_table*)translation_table_phys(), pd) {}
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Hw::Address_space::Address_space(Platform_pd & pd)
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: _tt(*construct_at<Page_table>(_table_alloc(), *((Page_table*)Hw::Mm::core_page_tables().base))),
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_tt_phys((addr_t)_cma().phys_addr(&_tt)),
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_tt_array(new (_cma()) Array([] (void * virt) {
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return (addr_t)_cma().phys_addr(virt);})),
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_tt_alloc(_tt_array->alloc()),
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_kobj(true, *(Page_table*)translation_table_phys(), pd) { }
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Hw::Address_space::~Address_space()
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{
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flush(platform().vm_start(), platform().vm_size());
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destroy(_cma(), _tt_array);
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destroy(_cma(), &_tt);
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}
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/******************************
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** Cap_space implementation **
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******************************/
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Cap_space::Cap_space() : _slab(nullptr, &_initial_sb) { }
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void Cap_space::upgrade_slab(Allocator &alloc)
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{
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void * block = nullptr;
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if (!alloc.alloc(SLAB_SIZE, &block))
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throw Out_of_ram();
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_slab.insert_sb(block);
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}
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/********************************
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** Platform_pd implementation **
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********************************/
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bool Platform_pd::bind_thread(Platform_thread &t)
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{
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/* is this the first and therefore main thread in this PD? */
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bool main_thread = !_thread_associated;
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_thread_associated = true;
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t.join_pd(this, main_thread, Address_space::weak_ptr());
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return true;
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}
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void Platform_pd::unbind_thread(Platform_thread &t) {
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t.join_pd(nullptr, false, Address_space::weak_ptr()); }
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void Platform_pd::assign_parent(Native_capability parent)
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{
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if (!_parent.valid() && parent.valid())
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_parent = parent;
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}
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Platform_pd::Platform_pd(Page_table & tt,
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Page_table::Allocator & alloc)
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: Hw::Address_space(tt, alloc, *this), _label("core") { }
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Platform_pd::Platform_pd(Allocator &, char const *label)
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: Hw::Address_space(*this), _label(label)
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{
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if (!_kobj.cap().valid()) {
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error("failed to create kernel object");
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throw Service_denied();
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}
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}
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Platform_pd::~Platform_pd()
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{
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/* invalidate weak pointers to this object */
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Address_space::lock_for_destruction();
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}
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/*************************************
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** Core_platform_pd implementation **
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*************************************/
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Core_platform_pd::Core_platform_pd()
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: Platform_pd(*(Hw::Page_table*)Hw::Mm::core_page_tables().base,
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Platform::core_page_table_allocator()) { }
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