115 lines
3.0 KiB
C++
115 lines
3.0 KiB
C++
/*
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* \brief Platform support specific to x86
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* \author Christian Helmuth
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* \author Stefan Kalkowski
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* \date 2006-04-11
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*/
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/*
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* Copyright (C) 2006-2017 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 <irq_session/irq_session.h>
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#include <util/xml_generator.h>
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#include "platform.h"
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#include "util.h"
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/* Fiasco.OC includes */
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namespace Fiasco {
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#include <l4/sys/ipc.h>
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#include <l4/sys/icu.h>
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#include <l4/sys/kip.h>
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}
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void Genode::Platform::_setup_io_port_alloc()
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{
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using namespace Fiasco;
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l4_fpage_t fpage = l4_iofpage(0, L4_WHOLE_IOADDRESS_SPACE);
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l4_utcb_mr()->mr[0] = fpage.raw;
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l4_utcb_br()->bdr &= ~L4_BDR_OFFSET_MASK;
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l4_utcb_br()->br[0] = L4_ITEM_MAP;
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l4_utcb_br()->br[1] = fpage.raw;
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l4_msgtag_t tag = l4_ipc_call(L4_BASE_PAGER_CAP, l4_utcb(),
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l4_msgtag(L4_PROTO_IO_PAGE_FAULT, 1, 0, 0),
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L4_IPC_NEVER);
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if (l4_ipc_error(tag, l4_utcb()))
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panic("Received no I/O ports from sigma0");
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/* setup allocator */
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_io_port_alloc.add_range(0, 0x10000);
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}
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void Genode::Platform::setup_irq_mode(unsigned irq_number, unsigned trigger,
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unsigned polarity)
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{
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using namespace Fiasco;
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l4_umword_t mode;
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/* set edge-high as default for legacy interrupts */
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if (irq_number < 16
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&& trigger == Irq_session::TRIGGER_UNCHANGED
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&& polarity == Irq_session::TRIGGER_UNCHANGED) {
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mode = L4_IRQ_F_POS_EDGE;
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} else {
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/*
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* Translate ACPI interrupt mode (trigger/polarity) to Fiasco APIC
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* values. Default is level low
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*/
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if (trigger == Irq_session::TRIGGER_LEVEL || trigger == Irq_session::TRIGGER_UNCHANGED) {
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if (polarity == Irq_session::POLARITY_LOW || polarity == Irq_session::POLARITY_UNCHANGED)
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mode = L4_IRQ_F_LEVEL_LOW;
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else
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mode = L4_IRQ_F_LEVEL_HIGH;
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}
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else {
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if (polarity == Irq_session::POLARITY_LOW || polarity == Irq_session::POLARITY_UNCHANGED)
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mode = L4_IRQ_F_NEG_EDGE;
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else
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mode = L4_IRQ_F_POS_EDGE;
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}
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}
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/*
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* Set mode
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*/
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if (l4_error(l4_icu_set_mode(L4_BASE_ICU_CAP, irq_number, mode)))
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error("setting mode for IRQ ", irq_number, " failed");
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}
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static bool cpu_name(char const * name) {
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using Genode::uint32_t;
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uint32_t cpuid = 0, edx = 0, ebx = 0, ecx = 0;
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asm volatile ("cpuid" : "+a" (cpuid), "=d" (edx), "=b"(ebx), "=c"(ecx));
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return ebx == *reinterpret_cast<uint32_t const *>(name) &&
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edx == *reinterpret_cast<uint32_t const *>(name + 4) &&
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ecx == *reinterpret_cast<uint32_t const *>(name + 8);
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}
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void Genode::Platform::_setup_platform_info(Xml_generator &xml,
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Fiasco::l4_kernel_info_t &kip)
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{
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xml.node("features", [&] () {
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/* XXX better detection required, best told us by kernel !? */
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xml.attribute("svm", cpu_name("AuthenticAMD"));
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xml.attribute("vmx", cpu_name("GenuineIntel"));
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});
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xml.node("tsc", [&] () {
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xml.attribute("freq_khz" , kip.frequency_cpu);
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});
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}
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