82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
/*
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* \brief Platform implementations specific for x86_64
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* \author Reto Buerki
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* \date 2015-05-04
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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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/* core includes */
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#include <platform.h>
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#include <board.h>
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#include <pic.h>
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#include <kernel/kernel.h>
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#include <multiboot.h>
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#include <base/internal/unmanaged_singleton.h>
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using namespace Genode;
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/* contains physical pointer to multiboot */
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extern "C" Genode::addr_t __initial_bx;
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void Platform::_init_additional() { };
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Memory_region_array & Platform::core_mmio_regions()
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{
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return *unmanaged_singleton<Memory_region_array>(
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Memory_region { Board::MMIO_LAPIC_BASE, Board::MMIO_LAPIC_SIZE },
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Memory_region { Board::MMIO_IOAPIC_BASE, Board::MMIO_IOAPIC_SIZE },
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Memory_region { __initial_bx & ~0xFFFUL, get_page_size() });
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}
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void Platform::setup_irq_mode(unsigned irq_number, unsigned trigger,
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unsigned polarity)
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{
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Kernel::pic()->ioapic.setup_irq_mode(irq_number, trigger, polarity);
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}
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bool Platform::get_msi_params(const addr_t mmconf, addr_t &address,
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addr_t &data, unsigned &irq_number)
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{
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return false;
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}
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Memory_region_array & Platform::ram_regions()
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{
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static Memory_region_array ram;
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/* initialize memory pool */
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if (ram.count() == 0) {
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using Mmap = Multiboot_info::Mmap;
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for (unsigned i = 0; true; i++) {
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Mmap v = Multiboot_info(__initial_bx).phys_ram(i);
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if (!v.base) break;
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Mmap::Addr::access_t base = v.read<Mmap::Addr>();
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Mmap::Length::access_t size = v.read<Mmap::Length>();
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/*
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* Exclude first physical page, so that it will become part of the
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* MMIO allocator. The framebuffer requests this page as MMIO.
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*/
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if (base == 0 && size >= get_page_size()) {
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base = get_page_size();
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size -= get_page_size();
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}
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ram.add(Memory_region { base, size });
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}
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}
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return ram;
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}
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