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hw/x86: ACPI tables parsing support

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Issue #2929
This commit is contained in:
Alexander Boettcher 2018-08-01 15:19:06 +02:00 committed by Christian Helmuth
parent e6046e0bc1
commit 538d91ecf2
1 changed files with 120 additions and 0 deletions
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repos/base-hw/src/lib/hw/spec/x86_64/acpi.h Normal file
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/*
* \brief ACPI structures and parsing
* \author Alexander Boettcher
* \date 2018-04-23
*/
/*
* Copyright (C) 2018 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU Affero General Public License version 3.
*/
#ifndef _SRC__LIB__HW__SPEC__X86_64__ACPI_H_
#define _SRC__LIB__HW__SPEC__X86_64__ACPI_H_
#include <base/fixed_stdint.h>
namespace Hw {
struct Acpi_generic;
struct Apic_madt;
template <typename FUNC>
void for_each_rsdt_entry(Hw::Acpi_generic &, FUNC);
template <typename FUNC>
void for_each_xsdt_entry(Hw::Acpi_generic &, FUNC);
template <typename FUNC>
void for_each_apic_struct(Acpi_generic &, FUNC);
}
/* ACPI spec 5.2.6 */
struct Hw::Acpi_generic
{
Genode::uint8_t signature[4];
Genode::uint32_t size;
Genode::uint8_t rev;
Genode::uint8_t checksum;
Genode::uint8_t oemid[6];
Genode::uint8_t oemtabid[8];
Genode::uint32_t oemrev;
Genode::uint8_t creator[4];
Genode::uint32_t creator_rev;
} __attribute__((packed));
struct Hw::Apic_madt
{
enum { LAPIC = 0, IO_APIC = 1 };
Genode::uint8_t type;
Genode::uint8_t length;
Apic_madt *next() const { return reinterpret_cast<Apic_madt *>((Genode::uint8_t *)this + length); }
struct Ioapic : Genode::Mmio {
struct Id : Register <0x02, 8> { };
struct Paddr : Register <0x04, 32> { };
struct Gsi_base : Register <0x08, 32> { };
Ioapic(Apic_madt const * a) : Mmio(reinterpret_cast<Genode::addr_t>(a)) { }
};
struct Lapic : Genode::Mmio {
struct Flags : Register <0x04, 32> { enum { ENABLED = 1 }; };
Lapic(Apic_madt const * a) : Mmio(reinterpret_cast<Genode::addr_t>(a)) { }
};
} __attribute__((packed));
template <typename FUNC>
void Hw::for_each_rsdt_entry(Hw::Acpi_generic &rsdt, FUNC fn)
{
if (Genode::memcmp(rsdt.signature, "RSDT", 4))
return;
typedef Genode::uint32_t entry_t;
unsigned const table_size = rsdt.size;
unsigned const entry_count = (table_size - sizeof(rsdt)) / sizeof(entry_t);
entry_t * entries = reinterpret_cast<entry_t *>(&rsdt + 1);
for (unsigned i = 0; i < entry_count; i++)
fn(entries[i]);
}
template <typename FUNC>
void Hw::for_each_xsdt_entry(Hw::Acpi_generic &xsdt, FUNC fn)
{
if (Genode::memcmp(xsdt.signature, "XSDT", 4))
return;
typedef Genode::uint64_t entry_t;
unsigned const table_size = xsdt.size;
unsigned const entry_count = (table_size - sizeof(xsdt)) / sizeof(entry_t);
entry_t * entries = reinterpret_cast<entry_t *>(&xsdt + 1);
for (unsigned i = 0; i < entry_count; i++)
fn(entries[i]);
}
template <typename FUNC>
void Hw::for_each_apic_struct(Hw::Acpi_generic &apic_madt, FUNC fn)
{
if (Genode::memcmp(apic_madt.signature, "APIC", 4))
return;
Apic_madt const * const first = reinterpret_cast<Apic_madt *>(&apic_madt.creator_rev + 3);
Apic_madt const * const last = reinterpret_cast<Apic_madt *>(reinterpret_cast<Genode::uint8_t *>(apic_madt.signature) + apic_madt.size);
for (Apic_madt const * e = first; e < last ; e = e->next())
fn(e);
}
#endif /* _SRC__LIB__HW__SPEC__X86_64__ACPI_H_ */