65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
/*
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* \brief Class for kernel data that is needed to manage a specific CPU
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* \author Reto Buerki
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* \date 2015-02-09
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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 <kernel/cpu.h>
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#include <kernel/kernel.h>
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#include <kernel/pd.h>
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using namespace Kernel;
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Cpu_idle::Cpu_idle(Cpu * const cpu) : Cpu_job(Cpu_priority::MIN, 0)
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{
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Cpu_job::cpu(cpu);
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ip = (addr_t)&_main;
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sp = (addr_t)&_stack[stack_size];
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init((addr_t)core_pd()->translation_table(), true);
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}
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void Cpu_idle::exception(unsigned const cpu)
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{
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if (trapno == RESET) {
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return;
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} else if (trapno >= INTERRUPTS_START && trapno <= INTERRUPTS_END) {
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_interrupt(cpu);
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return;
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}
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PWRN("Unknown exception %lu with error code %lu at ip=%p", trapno,
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errcode, (void *)ip);
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assert(0);
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}
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void Kernel::Cpu::init(Pic &pic, Kernel::Pd &core_pd)
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{
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Timer::disable_pit();
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_init_fpu();
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/*
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* Please do not remove the PINF(), because the serial constructor requires
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* access to the Bios Data Area, which is available in the initial
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* translation table set, but not in the final tables used after
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* Cr3::write().
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*/
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PINF("Switch to core's final translation table");
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Cr3::write(Cr3::init((addr_t)core_pd.translation_table()));
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/* enable timer interrupt */
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unsigned const cpu = Cpu::executing_id();
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pic.unmask(Timer::interrupt_id(cpu), cpu);
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}
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