5fe29e8e4a
This patch introduces new types for expressing CPU affinities. Instead of dealing with physical CPU numbers, affinities are expressed as rectangles in a grid of virtual CPU nodes. This clears the way to conveniently assign sets of adjacent CPUs to subsystems, each of them managing their respective viewport of the coordinate space. By using 2D Cartesian coordinates, the locality of CPU nodes can be modeled for different topologies such as SMP (simple Nx1 grid), grids of NUMA nodes, or ring topologies.
93 lines
2.5 KiB
C++
93 lines
2.5 KiB
C++
/*
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* \brief Platform interface
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* \author Norman Feske
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* \author Alexander Boettcher
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* \date 2009-10-02
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*/
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/*
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* Copyright (C) 2009-2013 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 _CORE__INCLUDE__PLATFORM_H_
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#define _CORE__INCLUDE__PLATFORM_H_
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/* core includes */
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#include <platform_generic.h>
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#include <core_mem_alloc.h>
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#include <base/printf.h>
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namespace Genode {
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class Platform : public Platform_generic
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{
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private:
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typedef Core_mem_allocator::Phys_allocator Phys_allocator;
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Core_mem_allocator _core_mem_alloc; /* core-accessible memory */
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Phys_allocator _io_mem_alloc; /* MMIO allocator */
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Phys_allocator _io_port_alloc; /* I/O port allocator */
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Phys_allocator _irq_alloc; /* IRQ allocator */
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Rom_fs _rom_fs; /* ROM file system */
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int _gsi_base_sel; /* cap selector of 1st IRQ */
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/**
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* Virtual address range usable by non-core processes
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*/
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const addr_t _vm_base;
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size_t _vm_size;
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/* available CPUs */
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Affinity::Space _cpus;
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addr_t _map_page(addr_t const phys_page, addr_t const pages,
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bool const extra_page);
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void _unmap_page(addr_t const phys, addr_t const virt,
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addr_t const pages);
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public:
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/**
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* Constructor
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*/
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Platform();
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/********************************
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** Generic platform interface **
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********************************/
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Range_allocator *ram_alloc() { return _core_mem_alloc.phys_alloc(); }
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Range_allocator *io_mem_alloc() { return &_io_mem_alloc; }
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Range_allocator *io_port_alloc() { return &_io_port_alloc; }
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Range_allocator *irq_alloc() { return &_irq_alloc; }
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Range_allocator *region_alloc() { return _core_mem_alloc.virt_alloc(); }
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Allocator *core_mem_alloc() { return &_core_mem_alloc; }
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addr_t vm_start() const { return _vm_base; }
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size_t vm_size() const { return _vm_size; }
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Rom_fs *rom_fs() { return &_rom_fs; }
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void wait_for_exit();
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bool supports_unmap() { return true; }
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Affinity::Space affinity_space() const { return _cpus; }
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/*******************
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** NOVA specific **
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*******************/
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/**
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* Return capability selector of first global system interrupt
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*/
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int gsi_base_sel() const { return _gsi_base_sel; }
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};
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}
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#endif /* _CORE__INCLUDE__PLATFORM_H_ */
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