241 lines
6.8 KiB
C++
241 lines
6.8 KiB
C++
/*
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* \brief Platform implementation specific for hw
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* \author Martin Stein
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* \author Stefan Kalkowski
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* \date 2011-12-21
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*/
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/*
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* Copyright (C) 2011-2017 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 <base/log.h>
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/* core includes */
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#include <boot_modules.h>
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#include <core_log.h>
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#include <hw/memory_region.h>
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#include "map_local.h"
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#include <platform.h>
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#include <platform_pd.h>
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#include <hw/page_flags.h>
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#include <hw/util.h>
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#include "kernel/kernel.h"
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#include <translation_table.h>
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#include "kernel/cpu.h"
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/* base-internal includes */
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#include <base/internal/crt0.h>
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#include <base/internal/stack_area.h>
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using namespace Genode;
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/**************
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** Platform **
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**************/
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Hw::Boot_info<Board::Boot_info> const & Platform::_boot_info() {
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return *reinterpret_cast<Hw::Boot_info<Board::Boot_info>*>(Hw::Mm::boot_info().base); }
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addr_t Platform::mmio_to_virt(addr_t mmio) {
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return _boot_info().mmio_space.virt_addr(mmio); }
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addr_t Platform::core_page_table() {
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return (addr_t)_boot_info().table; }
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Hw::Page_table::Allocator & Platform::core_page_table_allocator()
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{
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using Allocator = Hw::Page_table::Allocator;
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using Array = Allocator::Array<Hw::Page_table::CORE_TRANS_TABLE_COUNT>;
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addr_t virt_addr = Hw::Mm::core_page_tables().base + sizeof(Hw::Page_table);
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return *unmanaged_singleton<Array::Allocator>(_boot_info().table_allocator,
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virt_addr);
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}
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void Platform::_init_io_mem_alloc()
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{
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/* add entire adress space minus the RAM memory regions */
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_io_mem_alloc.add_range(0, ~0x0UL);
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_boot_info().ram_regions.for_each([this] (Hw::Memory_region const &r) {
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_io_mem_alloc.remove_range(r.base, r.size); });
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};
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Hw::Memory_region_array const & Platform::_core_virt_regions()
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{
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return *unmanaged_singleton<Hw::Memory_region_array>(
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Hw::Memory_region(stack_area_virtual_base(), stack_area_virtual_size()));
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}
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addr_t Platform::core_phys_addr(addr_t virt)
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{
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addr_t ret = 0;
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_boot_info().elf_mappings.for_each([&] (Hw::Mapping const & m)
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{
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if (virt >= m.virt() && virt < (m.virt() + m.size()))
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ret = (virt - m.virt()) + m.phys();
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});
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return ret;
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}
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addr_t Platform::_rom_module_phys(addr_t virt)
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{
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Hw::Mapping m = _boot_info().boot_modules;
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if (virt >= m.virt() && virt < (m.virt() + m.size()))
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return (virt - m.virt()) + m.phys();
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return 0;
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}
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void Platform::_init_platform_info()
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{
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unsigned const pages = 1;
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size_t const rom_size = pages << get_page_size_log2();
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void *phys_ptr = nullptr;
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void *virt_ptr = nullptr;
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const char *rom_name = "platform_info";
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if (!ram_alloc().alloc(get_page_size(), &phys_ptr)) {
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error("could not setup platform_info ROM - ram allocation error");
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return;
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}
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if (!region_alloc().alloc(rom_size, &virt_ptr)) {
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error("could not setup platform_info ROM - region allocation error");
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ram_alloc().free(phys_ptr);
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return;
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}
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addr_t const phys_addr = reinterpret_cast<addr_t>(phys_ptr);
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addr_t const virt_addr = reinterpret_cast<addr_t>(virt_ptr);
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if (!map_local(phys_addr, virt_addr, pages, Hw::PAGE_FLAGS_KERN_DATA)) {
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error("could not setup platform_info ROM - map error");
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region_alloc().free(virt_ptr);
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ram_alloc().free(phys_ptr);
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return;
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}
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Genode::Xml_generator xml(reinterpret_cast<char *>(virt_addr),
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rom_size, rom_name, [&] ()
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{
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xml.node("kernel", [&] () { xml.attribute("name", "hw"); });
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_init_additional_platform_info(xml);
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});
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if (!unmap_local(virt_addr, pages)) {
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error("could not setup platform_info ROM - unmap error");
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return;
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}
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region_alloc().free(virt_ptr);
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_rom_fs.insert(
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new (core_mem_alloc()) Rom_module(phys_addr, rom_size, rom_name));
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}
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Platform::Platform()
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:
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_io_mem_alloc(&core_mem_alloc()),
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_io_port_alloc(&core_mem_alloc()),
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_irq_alloc(&core_mem_alloc())
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{
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struct Kernel_resource : Exception { };
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_core_mem_alloc.virt_alloc().add_range(Hw::Mm::core_heap().base,
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Hw::Mm::core_heap().size);
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_core_virt_regions().for_each([this] (Hw::Memory_region const & r) {
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_core_mem_alloc.virt_alloc().remove_range(r.base, r.size); });
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_boot_info().elf_mappings.for_each([this] (Hw::Mapping const & m) {
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_core_mem_alloc.virt_alloc().remove_range(m.virt(), m.size()); });
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_boot_info().ram_regions.for_each([this] (Hw::Memory_region const & region) {
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_core_mem_alloc.phys_alloc().add_range(region.base, region.size); });
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_init_io_port_alloc();
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/* make all non-kernel interrupts available to the interrupt allocator */
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for (unsigned i = 0; i < Board::Pic::NR_OF_IRQ; i++) {
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bool kernel_resource = false;
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Kernel::cpu_pool().for_each_cpu([&] (Kernel::Cpu & cpu) {
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if (i == cpu.timer().interrupt_id()) {
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kernel_resource = true;
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}
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});
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if (i == Board::Pic::IPI) {
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kernel_resource = true;
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}
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if (kernel_resource) {
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continue;
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}
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_irq_alloc.add_range(i, 1);
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}
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_init_io_mem_alloc();
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_init_rom_modules();
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_init_platform_info();
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/* core log as ROM module */
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{
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void * core_local_ptr = nullptr;
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void * phys_ptr = nullptr;
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unsigned const pages = 1;
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size_t const log_size = pages << get_page_size_log2();
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ram_alloc().alloc_aligned(log_size, &phys_ptr, get_page_size_log2());
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addr_t const phys_addr = reinterpret_cast<addr_t>(phys_ptr);
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/* let one page free after the log buffer */
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region_alloc().alloc_aligned(log_size, &core_local_ptr, get_page_size_log2());
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addr_t const core_local_addr = reinterpret_cast<addr_t>(core_local_ptr);
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map_local(phys_addr, core_local_addr, pages);
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memset(core_local_ptr, 0, log_size);
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_rom_fs.insert(new (core_mem_alloc()) Rom_module(phys_addr, log_size,
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"core_log"));
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init_core_log(Core_log_range { core_local_addr, log_size } );
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}
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log(_rom_fs);
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}
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/****************************************
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** Support for core memory management **
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****************************************/
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bool Genode::map_local(addr_t from_phys, addr_t to_virt, size_t num_pages,
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Page_flags flags)
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{
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Platform_pd &pd = Kernel::core_pd().platform_pd();
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return pd.insert_translation(to_virt, from_phys,
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num_pages * get_page_size(), flags);
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}
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bool Genode::unmap_local(addr_t virt_addr, size_t num_pages)
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{
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Platform_pd &pd = Kernel::core_pd().platform_pd();
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pd.flush(virt_addr, num_pages * get_page_size());
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return true;
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}
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bool Mapped_mem_allocator::_map_local(addr_t virt_addr, addr_t phys_addr,
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unsigned size) {
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return ::map_local(phys_addr, virt_addr, size / get_page_size()); }
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bool Mapped_mem_allocator::_unmap_local(addr_t virt_addr, addr_t,
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unsigned size) {
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return ::unmap_local(virt_addr, size / get_page_size()); }
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