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acpica: use platform_info for rsdt/xsdt lookup

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Issue #2242
This commit is contained in:
Alexander Boettcher 2017-01-31 20:46:18 +01:00 committed by Norman Feske
parent 04b2919a1a
commit f48e71e070
3 changed files with 115 additions and 108 deletions
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2
repos/libports/lib/mk/acpica.mk
View File

@ -15,7 +15,7 @@ SRC_C += $(addprefix resources/, $(notdir $(wildcard $(ACPICA_COMP)/resources/*.
SRC_C += $(addprefix tables/, $(notdir $(wildcard $(ACPICA_COMP)/tables/*.c)))
SRC_C += $(addprefix utilities/, $(notdir $(wildcard $(ACPICA_COMP)/utilities/*.c)))
SRC_CC += osl.cc iomem.cc pci.cc scan_root.cc env.cc
SRC_CC += osl.cc iomem.cc pci.cc env.cc
include $(REP_DIR)/lib/import/import-acpica.mk

116
repos/libports/src/lib/acpica/iomem.cc
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@ -1,5 +1,6 @@
/*
* \brief I/O memory backend for ACPICA library
* \brief I/O memory backend for ACPICA library and lookup code
* for initial ACPI RSDP pointer
* \author Alexander Boettcher
* \date 2016-11-14
*/
@ -11,6 +12,8 @@
* under the terms of the GNU Affero General Public License version 3.
*/
#include <base/attached_io_mem_dataspace.h>
#include <base/attached_rom_dataspace.h>
#include <base/log.h>
#include <util/misc_math.h>
@ -32,7 +35,84 @@ extern "C" {
return retval; \
}
namespace Acpica { class Io_mem; };
namespace Acpica {
class Io_mem;
class Rsdp;
};
class Acpica::Rsdp
{
private:
/* BIOS range to scan for RSDP */
enum { BIOS_BASE = 0xe0000, BIOS_SIZE = 0x20000 };
/**
* Search for RSDP pointer signature in area
*/
Genode::uint8_t *_search_rsdp(Genode::uint8_t *area,
Genode::size_t const area_size)
{
for (Genode::addr_t addr = 0; area && addr < area_size; addr += 16)
/* XXX checksum table */
if (!Genode::memcmp(area + addr, "RSD PTR ", 8))
return area + addr;
return nullptr;
}
/**
* Return 'Root System Descriptor Pointer' (ACPI spec 5.2.5.1)
*/
Genode::uint64_t _rsdp(Genode::Env &env)
{
Genode::uint8_t * local = 0;
/* try BIOS area */
{
Genode::Attached_io_mem_dataspace io_mem(env, BIOS_BASE, BIOS_SIZE);
local = _search_rsdp(io_mem.local_addr<Genode::uint8_t>(), BIOS_SIZE);
if (local)
return BIOS_BASE + (local - io_mem.local_addr<Genode::uint8_t>());
}
/* search EBDA (BIOS addr + 0x40e) */
try {
unsigned short base = 0;
{
Genode::Attached_io_mem_dataspace io_mem(env, 0, 0x1000);
local = io_mem.local_addr<Genode::uint8_t>();
if (local)
base = (*reinterpret_cast<unsigned short *>(local + 0x40e)) << 4;
}
if (!base)
return 0;
Genode::Attached_io_mem_dataspace io_mem(env, base, 1024);
local = _search_rsdp(io_mem.local_addr<Genode::uint8_t>(), 1024);
if (local)
return base + (local - io_mem.local_addr<Genode::uint8_t>());
} catch (...) {
Genode::warning("failed to scan EBDA for RSDP root");
}
return 0;
}
public:
Rsdp() { }
Genode::addr_t phys_rsdp(Genode::Env &env)
{
Genode::uint64_t phys_rsdp = _rsdp(env);
return phys_rsdp;
}
};
class Acpica::Io_mem
{
@ -231,9 +311,38 @@ class Acpica::Io_mem
Acpica::Io_mem Acpica::Io_mem::_ios[32];
static ACPI_TABLE_RSDP faked_rsdp;
enum { FAKED_PHYS_RSDP_ADDR = 1 };
ACPI_PHYSICAL_ADDRESS AcpiOsGetRootPointer (void)
{
Genode::Env &env = Acpica::env();
/* try platform_info ROM provided by core */
try {
Genode::Attached_rom_dataspace info(env, "platform_info");
Genode::Xml_node xml(info.local_addr<char>(), info.size());
Genode::Xml_node acpi_node = xml.sub_node("acpi");
faked_rsdp.Revision = acpi_node.attribute_value("revision", 0U);
faked_rsdp.RsdtPhysicalAddress = acpi_node.attribute_value("rsdt", 0UL);
faked_rsdp.XsdtPhysicalAddress = acpi_node.attribute_value("xsdt", 0UL);
if (faked_rsdp.XsdtPhysicalAddress || faked_rsdp.RsdtPhysicalAddress)
return FAKED_PHYS_RSDP_ADDR;
} catch (...) { }
/* legacy way - search and grep for the pointer */
Acpica::Rsdp acpi_table;
ACPI_PHYSICAL_ADDRESS rsdp = acpi_table.phys_rsdp(env);
return rsdp;
}
void * AcpiOsMapMemory (ACPI_PHYSICAL_ADDRESS phys, ACPI_SIZE size)
{
if (phys == FAKED_PHYS_RSDP_ADDR)
return &faked_rsdp;
Genode::addr_t virt = Acpica::Io_mem::apply_u([&] (Acpica::Io_mem &io_mem) {
if (io_mem.unused() || io_mem.stale())
return 0UL;
@ -265,6 +374,9 @@ void * AcpiOsMapMemory (ACPI_PHYSICAL_ADDRESS phys, ACPI_SIZE size)
void AcpiOsUnmapMemory (void * ptr, ACPI_SIZE size)
{
if (ptr == &faked_rsdp)
return;
Genode::uint8_t const * virt = reinterpret_cast<Genode::uint8_t *>(ptr);
if (Acpica::Io_mem::apply_u([&] (Acpica::Io_mem &io_mem) {

105
repos/libports/src/lib/acpica/scan_root.cc
View File

@ -1,105 +0,0 @@
/*
* \brief Lookup code for initial ACPI RSDP pointer
* \author Alexander Boettcher
* \date 2016-11-14
*/
/*
* Copyright (C) 2016-2017 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.
*/
#include <io_mem_session/connection.h>
#include <base/attached_io_mem_dataspace.h>
#include "env.h"
extern "C" {
#include "acpi.h"
}
namespace Genode {
class Acpi_table;
}
class Genode::Acpi_table
{
private:
/* BIOS range to scan for RSDP */
enum { BIOS_BASE = 0xe0000, BIOS_SIZE = 0x20000 };
/**
* Search for RSDP pointer signature in area
*/
uint8_t *_search_rsdp(uint8_t *area)
{
for (addr_t addr = 0; area && addr < BIOS_SIZE; addr += 16)
/* XXX checksum table */
if (!memcmp(area + addr, "RSD PTR ", 8))
return area + addr;
return nullptr;
}
/**
* Return 'Root System Descriptor Pointer' (ACPI spec 5.2.5.1)
*/
uint64_t _rsdp()
{
uint8_t * local = 0;
Genode::Env &env = Acpica::env();
/* try BIOS area */
{
Genode::Attached_io_mem_dataspace io_mem(env, BIOS_BASE, BIOS_SIZE);
local = _search_rsdp(io_mem.local_addr<uint8_t>());
if (local)
return BIOS_BASE + (local - io_mem.local_addr<uint8_t>());
}
/* search EBDA (BIOS addr + 0x40e) */
try {
unsigned short base = 0;
{
Genode::Attached_io_mem_dataspace io_mem(env, 0, 0x1000);
local = io_mem.local_addr<uint8_t>();
if (local)
base = (*reinterpret_cast<unsigned short *>(local + 0x40e)) << 4;
}
if (!base)
return 0;
Genode::Attached_io_mem_dataspace io_mem(env, base, 1024);
local = _search_rsdp(io_mem.local_addr<uint8_t>());
if (local)
return base + (local - io_mem.local_addr<uint8_t>());
} catch (...) {
Genode::warning("failed to scan EBDA for RSDP root");
}
return 0;
}
public:
Acpi_table() { }
Genode::addr_t phys_rsdp()
{
Genode::uint64_t phys_rsdp = _rsdp();
return phys_rsdp;
}
};
ACPI_PHYSICAL_ADDRESS AcpiOsGetRootPointer (void)
{
Genode::Acpi_table acpi_table;
ACPI_PHYSICAL_ADDRESS rsdp = acpi_table.phys_rsdp();
return rsdp;
}