225 lines
6.5 KiB
C++
225 lines
6.5 KiB
C++
/*
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* \brief OKL4 platform interface implementation
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* \author Norman Feske
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* \date 2009-03-31
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*/
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/*
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* Copyright (C) 2009-2017 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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#include <base/allocator_avl.h>
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#include <base/sleep.h>
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#include <util/misc_math.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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#include <base/internal/native_utcb.h>
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#include <base/internal/globals.h>
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#include <base/internal/okl4.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 <platform.h>
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#include <platform_thread.h>
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#include <platform_pd.h>
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#include <map_local.h>
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using namespace Genode;
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/****************************************
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** Support for core memory management **
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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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/**********************
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** Boot-info parser **
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**********************/
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int Platform::bi_init_mem(Okl4::uintptr_t virt_base, Okl4::uintptr_t virt_end,
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Okl4::uintptr_t phys_base, Okl4::uintptr_t phys_end,
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const Okl4::bi_user_data_t *data)
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{
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Platform &p = *(Platform *)data->user_data;
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p._core_mem_alloc.phys_alloc().add_range(phys_base, phys_end - phys_base + 1);
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p._core_mem_alloc.virt_alloc().add_range(virt_base, virt_end - virt_base + 1);
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return 0;
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}
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int Platform::bi_add_virt_mem(Okl4::bi_name_t, Okl4::uintptr_t base,
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Okl4::uintptr_t end, const Okl4::bi_user_data_t *data)
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{
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/* prevent first page from being added to core memory */
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if (base < get_page_size() || end < get_page_size())
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return 0;
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Platform &p = *(Platform *)data->user_data;
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p._core_mem_alloc.virt_alloc().add_range(base, end - base + 1);
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return 0;
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}
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int Platform::bi_add_phys_mem(Okl4::bi_name_t pool, Okl4::uintptr_t base,
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Okl4::uintptr_t end, const Okl4::bi_user_data_t *data)
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{
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if (pool == 2) {
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Platform &p = *(Platform *)data->user_data;
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p._core_mem_alloc.phys_alloc().add_range(base, end - base + 1);
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}
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return 0;
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}
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static char init_slab_block_rom[get_page_size()];
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static char init_slab_block_thread[get_page_size()];
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Platform::Platform()
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:
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_io_mem_alloc(&core_mem_alloc()), _io_port_alloc(&core_mem_alloc()),
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_irq_alloc(&core_mem_alloc()),
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_rom_slab(&core_mem_alloc(), &init_slab_block_rom),
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_thread_slab(core_mem_alloc(), &init_slab_block_thread)
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{
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/*
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* We must be single-threaded at this stage and so this is safe.
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*/
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static bool initialized = 0;
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if (initialized) panic("Platform constructed twice!");
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initialized = true;
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/*
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* Determine address of boot-info structure. On startup, the OKL4 kernel
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* provides this address in roottask's UTCB message register 1.
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*/
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Okl4::L4_Word_t boot_info_addr;
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Okl4::L4_StoreMR(1, &boot_info_addr);
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/*
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* Request base address for UTCB locations
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*/
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_utcb_base = (addr_t)Okl4::utcb_base_get();
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/*
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* Define our own thread ID
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*/
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Okl4::__L4_TCR_Set_ThreadWord(UTCB_TCR_THREAD_WORD_MYSELF, Okl4::L4_rootserver.raw);
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/*
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* By default, the first roottask thread is executed at maxiumum priority.
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* To make preemptive scheduler work as expected, we set the priority of
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* ourself to the default priority of all other threads, which is 100 on
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* OKL4.
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*/
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L4_Set_Priority(Okl4::L4_Myself(), Platform_thread::DEFAULT_PRIORITY);
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/*
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* Invoke boot-info parser for determining the memory configuration and
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* the location of the boot modules.
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*/
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/*
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* Initialize callback function for parsing the boot-info
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*
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* The supplied callback functions differ slightly from the interface
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* used by the boot-info library in that they do not have a return
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* type.
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*/
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static Okl4::bi_callbacks_t callbacks;
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callbacks.init_mem = Platform::bi_init_mem;
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callbacks.add_virt_mem = Platform::bi_add_virt_mem;
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callbacks.add_phys_mem = Platform::bi_add_phys_mem;
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Okl4::bootinfo_parse((void *)boot_info_addr, &callbacks, this);
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/* initialize interrupt allocator */
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_irq_alloc.add_range(0, 0x10);
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/* I/O memory could be the whole user address space */
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_io_mem_alloc.add_range(0, ~0);
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/* I/O port allocator (only meaningful for x86) */
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_io_port_alloc.add_range(0, 0x10000);
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_init_rom_modules();
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/* preserve stack area in core's virtual address space */
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_core_mem_alloc.virt_alloc().remove_range(stack_area_virtual_base(),
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stack_area_virtual_size());
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_vm_start = 0x1000;
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_vm_size = 0xc0000000 - _vm_start;
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log(_rom_fs);
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/* setup task object for core task */
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_core_pd = new (core_mem_alloc()) Platform_pd(true);
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/*
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* We setup the thread object for thread0 in core task using a special
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* interface that allows us to specify the thread ID. For core this creates
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* the situation that task_id == thread_id of first task. But since we do
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* not destroy this task, it should be no problem.
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*/
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Platform_thread &core_thread =
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*new (&_thread_slab) Platform_thread("core.main");
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core_thread.set_l4_thread_id(Okl4::L4_rootserver);
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_core_pd->bind_thread(core_thread);
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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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}
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/********************************
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** Generic platform interface **
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********************************/
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void Platform::wait_for_exit()
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{
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/*
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* On OKL4, core never exits. So let us sleep forever.
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*/
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sleep_forever();
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}
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