ARM64 / ACPI: Get RSDP and ACPI boot-time tables
As we want to get ACPI tables to parse and then use the information
for system initialization, we should get the RSDP (Root System
Description Pointer) first, it then locates Extended Root Description
Table (XSDT) which contains all the 64-bit physical address that
pointer to other boot-time tables.
Introduce acpi.c and its related head file in this patch to provide
fundamental needs of extern variables and functions for ACPI core,
and then get boot-time tables as needed.
- asm/acenv.h for arch specific ACPICA environments and
implementation, It is needed unconditionally by ACPI core;
- asm/acpi.h for arch specific variables and functions needed by
ACPI driver core;
- acpi.c for ARM64 related ACPI implementation for ACPI driver
core;
acpi_boot_table_init() is introduced to get RSDP and boot-time tables,
it will be called in setup_arch() before paging_init(), so we should
use eary_memremap() mechanism here to get the RSDP and all the table
pointers.
FADT Major.Minor version was introduced in ACPI 5.1, it is the same
as ACPI version.
In ACPI 5.1, some major gaps are fixed for ARM, such as updates in
MADT table for GIC and SMP init, without those updates, we can not
get the MPIDR for SMP init, and GICv2/3 related init information, so
we can't boot arm64 ACPI properly with table versions predating 5.1.
If firmware provides ACPI tables with ACPI version less than 5.1,
OS has no way to retrieve the configuration data that is necessary
to init SMP boot protocol and the GIC properly, so disable ACPI if
we get an FADT table with version less that 5.1 when acpi_boot_table_init()
called.
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will.deacon@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Tested-by: Yijing Wang <wangyijing@huawei.com>
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: Jon Masters <jcm@redhat.com>
Tested-by: Timur Tabi <timur@codeaurora.org>
Tested-by: Robert Richter <rrichter@cavium.com>
Acked-by: Robert Richter <rrichter@cavium.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Al Stone <al.stone@linaro.org>
Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-03-24 08:02:37 -06:00
|
|
|
/*
|
|
|
|
* ARM64 Specific Low-Level ACPI Boot Support
|
|
|
|
*
|
|
|
|
* Copyright (C) 2013-2014, Linaro Ltd.
|
|
|
|
* Author: Al Stone <al.stone@linaro.org>
|
|
|
|
* Author: Graeme Gregory <graeme.gregory@linaro.org>
|
|
|
|
* Author: Hanjun Guo <hanjun.guo@linaro.org>
|
|
|
|
* Author: Tomasz Nowicki <tomasz.nowicki@linaro.org>
|
|
|
|
* Author: Naresh Bhat <naresh.bhat@linaro.org>
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
|
|
* published by the Free Software Foundation.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define pr_fmt(fmt) "ACPI: " fmt
|
|
|
|
|
|
|
|
#include <linux/acpi.h>
|
|
|
|
#include <linux/bootmem.h>
|
|
|
|
#include <linux/cpumask.h>
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/irq.h>
|
|
|
|
#include <linux/irqdomain.h>
|
|
|
|
#include <linux/memblock.h>
|
2015-03-24 08:02:41 -06:00
|
|
|
#include <linux/of_fdt.h>
|
ARM64 / ACPI: Get RSDP and ACPI boot-time tables
As we want to get ACPI tables to parse and then use the information
for system initialization, we should get the RSDP (Root System
Description Pointer) first, it then locates Extended Root Description
Table (XSDT) which contains all the 64-bit physical address that
pointer to other boot-time tables.
Introduce acpi.c and its related head file in this patch to provide
fundamental needs of extern variables and functions for ACPI core,
and then get boot-time tables as needed.
- asm/acenv.h for arch specific ACPICA environments and
implementation, It is needed unconditionally by ACPI core;
- asm/acpi.h for arch specific variables and functions needed by
ACPI driver core;
- acpi.c for ARM64 related ACPI implementation for ACPI driver
core;
acpi_boot_table_init() is introduced to get RSDP and boot-time tables,
it will be called in setup_arch() before paging_init(), so we should
use eary_memremap() mechanism here to get the RSDP and all the table
pointers.
FADT Major.Minor version was introduced in ACPI 5.1, it is the same
as ACPI version.
In ACPI 5.1, some major gaps are fixed for ARM, such as updates in
MADT table for GIC and SMP init, without those updates, we can not
get the MPIDR for SMP init, and GICv2/3 related init information, so
we can't boot arm64 ACPI properly with table versions predating 5.1.
If firmware provides ACPI tables with ACPI version less than 5.1,
OS has no way to retrieve the configuration data that is necessary
to init SMP boot protocol and the GIC properly, so disable ACPI if
we get an FADT table with version less that 5.1 when acpi_boot_table_init()
called.
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will.deacon@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Tested-by: Yijing Wang <wangyijing@huawei.com>
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: Jon Masters <jcm@redhat.com>
Tested-by: Timur Tabi <timur@codeaurora.org>
Tested-by: Robert Richter <rrichter@cavium.com>
Acked-by: Robert Richter <rrichter@cavium.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Al Stone <al.stone@linaro.org>
Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-03-24 08:02:37 -06:00
|
|
|
#include <linux/smp.h>
|
|
|
|
|
2015-03-24 08:02:45 -06:00
|
|
|
#include <asm/cputype.h>
|
|
|
|
#include <asm/cpu_ops.h>
|
|
|
|
#include <asm/smp_plat.h>
|
|
|
|
|
2015-03-24 08:02:41 -06:00
|
|
|
int acpi_noirq = 1; /* skip ACPI IRQ initialization */
|
|
|
|
int acpi_disabled = 1;
|
ARM64 / ACPI: Get RSDP and ACPI boot-time tables
As we want to get ACPI tables to parse and then use the information
for system initialization, we should get the RSDP (Root System
Description Pointer) first, it then locates Extended Root Description
Table (XSDT) which contains all the 64-bit physical address that
pointer to other boot-time tables.
Introduce acpi.c and its related head file in this patch to provide
fundamental needs of extern variables and functions for ACPI core,
and then get boot-time tables as needed.
- asm/acenv.h for arch specific ACPICA environments and
implementation, It is needed unconditionally by ACPI core;
- asm/acpi.h for arch specific variables and functions needed by
ACPI driver core;
- acpi.c for ARM64 related ACPI implementation for ACPI driver
core;
acpi_boot_table_init() is introduced to get RSDP and boot-time tables,
it will be called in setup_arch() before paging_init(), so we should
use eary_memremap() mechanism here to get the RSDP and all the table
pointers.
FADT Major.Minor version was introduced in ACPI 5.1, it is the same
as ACPI version.
In ACPI 5.1, some major gaps are fixed for ARM, such as updates in
MADT table for GIC and SMP init, without those updates, we can not
get the MPIDR for SMP init, and GICv2/3 related init information, so
we can't boot arm64 ACPI properly with table versions predating 5.1.
If firmware provides ACPI tables with ACPI version less than 5.1,
OS has no way to retrieve the configuration data that is necessary
to init SMP boot protocol and the GIC properly, so disable ACPI if
we get an FADT table with version less that 5.1 when acpi_boot_table_init()
called.
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will.deacon@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Tested-by: Yijing Wang <wangyijing@huawei.com>
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: Jon Masters <jcm@redhat.com>
Tested-by: Timur Tabi <timur@codeaurora.org>
Tested-by: Robert Richter <rrichter@cavium.com>
Acked-by: Robert Richter <rrichter@cavium.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Al Stone <al.stone@linaro.org>
Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-03-24 08:02:37 -06:00
|
|
|
EXPORT_SYMBOL(acpi_disabled);
|
|
|
|
|
2015-03-24 08:02:41 -06:00
|
|
|
int acpi_pci_disabled = 1; /* skip ACPI PCI scan and IRQ initialization */
|
ARM64 / ACPI: Get RSDP and ACPI boot-time tables
As we want to get ACPI tables to parse and then use the information
for system initialization, we should get the RSDP (Root System
Description Pointer) first, it then locates Extended Root Description
Table (XSDT) which contains all the 64-bit physical address that
pointer to other boot-time tables.
Introduce acpi.c and its related head file in this patch to provide
fundamental needs of extern variables and functions for ACPI core,
and then get boot-time tables as needed.
- asm/acenv.h for arch specific ACPICA environments and
implementation, It is needed unconditionally by ACPI core;
- asm/acpi.h for arch specific variables and functions needed by
ACPI driver core;
- acpi.c for ARM64 related ACPI implementation for ACPI driver
core;
acpi_boot_table_init() is introduced to get RSDP and boot-time tables,
it will be called in setup_arch() before paging_init(), so we should
use eary_memremap() mechanism here to get the RSDP and all the table
pointers.
FADT Major.Minor version was introduced in ACPI 5.1, it is the same
as ACPI version.
In ACPI 5.1, some major gaps are fixed for ARM, such as updates in
MADT table for GIC and SMP init, without those updates, we can not
get the MPIDR for SMP init, and GICv2/3 related init information, so
we can't boot arm64 ACPI properly with table versions predating 5.1.
If firmware provides ACPI tables with ACPI version less than 5.1,
OS has no way to retrieve the configuration data that is necessary
to init SMP boot protocol and the GIC properly, so disable ACPI if
we get an FADT table with version less that 5.1 when acpi_boot_table_init()
called.
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will.deacon@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Tested-by: Yijing Wang <wangyijing@huawei.com>
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: Jon Masters <jcm@redhat.com>
Tested-by: Timur Tabi <timur@codeaurora.org>
Tested-by: Robert Richter <rrichter@cavium.com>
Acked-by: Robert Richter <rrichter@cavium.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Al Stone <al.stone@linaro.org>
Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-03-24 08:02:37 -06:00
|
|
|
EXPORT_SYMBOL(acpi_pci_disabled);
|
|
|
|
|
2015-03-24 08:02:45 -06:00
|
|
|
/* Processors with enabled flag and sane MPIDR */
|
|
|
|
static int enabled_cpus;
|
|
|
|
|
|
|
|
/* Boot CPU is valid or not in MADT */
|
|
|
|
static bool bootcpu_valid __initdata;
|
|
|
|
|
2015-03-24 08:02:41 -06:00
|
|
|
static bool param_acpi_off __initdata;
|
2015-03-24 08:02:56 -06:00
|
|
|
bool param_acpi_force __initdata;
|
2015-03-24 08:02:41 -06:00
|
|
|
|
|
|
|
static int __init parse_acpi(char *arg)
|
|
|
|
{
|
|
|
|
if (!arg)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
/* "acpi=off" disables both ACPI table parsing and interpreter */
|
|
|
|
if (strcmp(arg, "off") == 0)
|
|
|
|
param_acpi_off = true;
|
|
|
|
else if (strcmp(arg, "force") == 0) /* force ACPI to be enabled */
|
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|
|
param_acpi_force = true;
|
|
|
|
else
|
|
|
|
return -EINVAL; /* Core will print when we return error */
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
early_param("acpi", parse_acpi);
|
|
|
|
|
|
|
|
static int __init dt_scan_depth1_nodes(unsigned long node,
|
|
|
|
const char *uname, int depth,
|
|
|
|
void *data)
|
|
|
|
{
|
|
|
|
/*
|
|
|
|
* Return 1 as soon as we encounter a node at depth 1 that is
|
|
|
|
* not the /chosen node.
|
|
|
|
*/
|
|
|
|
if (depth == 1 && (strcmp(uname, "chosen") != 0))
|
|
|
|
return 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
ARM64 / ACPI: Get RSDP and ACPI boot-time tables
As we want to get ACPI tables to parse and then use the information
for system initialization, we should get the RSDP (Root System
Description Pointer) first, it then locates Extended Root Description
Table (XSDT) which contains all the 64-bit physical address that
pointer to other boot-time tables.
Introduce acpi.c and its related head file in this patch to provide
fundamental needs of extern variables and functions for ACPI core,
and then get boot-time tables as needed.
- asm/acenv.h for arch specific ACPICA environments and
implementation, It is needed unconditionally by ACPI core;
- asm/acpi.h for arch specific variables and functions needed by
ACPI driver core;
- acpi.c for ARM64 related ACPI implementation for ACPI driver
core;
acpi_boot_table_init() is introduced to get RSDP and boot-time tables,
it will be called in setup_arch() before paging_init(), so we should
use eary_memremap() mechanism here to get the RSDP and all the table
pointers.
FADT Major.Minor version was introduced in ACPI 5.1, it is the same
as ACPI version.
In ACPI 5.1, some major gaps are fixed for ARM, such as updates in
MADT table for GIC and SMP init, without those updates, we can not
get the MPIDR for SMP init, and GICv2/3 related init information, so
we can't boot arm64 ACPI properly with table versions predating 5.1.
If firmware provides ACPI tables with ACPI version less than 5.1,
OS has no way to retrieve the configuration data that is necessary
to init SMP boot protocol and the GIC properly, so disable ACPI if
we get an FADT table with version less that 5.1 when acpi_boot_table_init()
called.
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will.deacon@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Tested-by: Yijing Wang <wangyijing@huawei.com>
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: Jon Masters <jcm@redhat.com>
Tested-by: Timur Tabi <timur@codeaurora.org>
Tested-by: Robert Richter <rrichter@cavium.com>
Acked-by: Robert Richter <rrichter@cavium.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Al Stone <al.stone@linaro.org>
Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-03-24 08:02:37 -06:00
|
|
|
/*
|
|
|
|
* __acpi_map_table() will be called before page_init(), so early_ioremap()
|
|
|
|
* or early_memremap() should be called here to for ACPI table mapping.
|
|
|
|
*/
|
|
|
|
char *__init __acpi_map_table(unsigned long phys, unsigned long size)
|
|
|
|
{
|
|
|
|
if (!size)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
return early_memremap(phys, size);
|
|
|
|
}
|
|
|
|
|
|
|
|
void __init __acpi_unmap_table(char *map, unsigned long size)
|
|
|
|
{
|
|
|
|
if (!map || !size)
|
|
|
|
return;
|
|
|
|
|
|
|
|
early_memunmap(map, size);
|
|
|
|
}
|
|
|
|
|
2015-03-24 08:02:45 -06:00
|
|
|
/**
|
|
|
|
* acpi_map_gic_cpu_interface - generates a logical cpu number
|
|
|
|
* and map to MPIDR represented by GICC structure
|
|
|
|
* @mpidr: CPU's hardware id to register, MPIDR represented in MADT
|
|
|
|
* @enabled: this cpu is enabled or not
|
|
|
|
*
|
|
|
|
* Returns the logical cpu number which maps to MPIDR
|
|
|
|
*/
|
|
|
|
static int __init acpi_map_gic_cpu_interface(u64 mpidr, u8 enabled)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (mpidr == INVALID_HWID) {
|
|
|
|
pr_info("Skip MADT cpu entry with invalid MPIDR\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
total_cpus++;
|
|
|
|
if (!enabled)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (enabled_cpus >= NR_CPUS) {
|
|
|
|
pr_warn("NR_CPUS limit of %d reached, Processor %d/0x%llx ignored.\n",
|
|
|
|
NR_CPUS, total_cpus, mpidr);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Check if GICC structure of boot CPU is available in the MADT */
|
|
|
|
if (cpu_logical_map(0) == mpidr) {
|
|
|
|
if (bootcpu_valid) {
|
|
|
|
pr_err("Firmware bug, duplicate CPU MPIDR: 0x%llx in MADT\n",
|
|
|
|
mpidr);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
bootcpu_valid = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Duplicate MPIDRs are a recipe for disaster. Scan
|
|
|
|
* all initialized entries and check for
|
|
|
|
* duplicates. If any is found just ignore the CPU.
|
|
|
|
*/
|
|
|
|
for (i = 1; i < enabled_cpus; i++) {
|
|
|
|
if (cpu_logical_map(i) == mpidr) {
|
|
|
|
pr_err("Firmware bug, duplicate CPU MPIDR: 0x%llx in MADT\n",
|
|
|
|
mpidr);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!acpi_psci_present())
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
|
|
|
|
cpu_ops[enabled_cpus] = cpu_get_ops("psci");
|
|
|
|
/* CPU 0 was already initialized */
|
|
|
|
if (enabled_cpus) {
|
|
|
|
if (!cpu_ops[enabled_cpus])
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (cpu_ops[enabled_cpus]->cpu_init(NULL, enabled_cpus))
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
|
|
|
|
/* map the logical cpu id to cpu MPIDR */
|
|
|
|
cpu_logical_map(enabled_cpus) = mpidr;
|
|
|
|
}
|
|
|
|
|
|
|
|
enabled_cpus++;
|
|
|
|
return enabled_cpus;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __init
|
|
|
|
acpi_parse_gic_cpu_interface(struct acpi_subtable_header *header,
|
|
|
|
const unsigned long end)
|
|
|
|
{
|
|
|
|
struct acpi_madt_generic_interrupt *processor;
|
|
|
|
|
|
|
|
processor = (struct acpi_madt_generic_interrupt *)header;
|
|
|
|
|
|
|
|
if (BAD_MADT_ENTRY(processor, end))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
acpi_table_print_madt_entry(header);
|
|
|
|
|
|
|
|
acpi_map_gic_cpu_interface(processor->arm_mpidr & MPIDR_HWID_BITMASK,
|
|
|
|
processor->flags & ACPI_MADT_ENABLED);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Parse GIC cpu interface entries in MADT for SMP init */
|
|
|
|
void __init acpi_init_cpus(void)
|
|
|
|
{
|
|
|
|
int count, i;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* do a partial walk of MADT to determine how many CPUs
|
|
|
|
* we have including disabled CPUs, and get information
|
|
|
|
* we need for SMP init
|
|
|
|
*/
|
|
|
|
count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_INTERRUPT,
|
|
|
|
acpi_parse_gic_cpu_interface, 0);
|
|
|
|
|
|
|
|
if (!count) {
|
|
|
|
pr_err("No GIC CPU interface entries present\n");
|
|
|
|
return;
|
|
|
|
} else if (count < 0) {
|
|
|
|
pr_err("Error parsing GIC CPU interface entry\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!bootcpu_valid) {
|
|
|
|
pr_err("MADT missing boot CPU MPIDR, not enabling secondaries\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < enabled_cpus; i++)
|
|
|
|
set_cpu_possible(i, true);
|
|
|
|
|
|
|
|
/* Make boot-up look pretty */
|
|
|
|
pr_info("%d CPUs enabled, %d CPUs total\n", enabled_cpus, total_cpus);
|
|
|
|
}
|
|
|
|
|
2015-03-25 09:13:56 -06:00
|
|
|
/*
|
|
|
|
* acpi_fadt_sanity_check() - Check FADT presence and carry out sanity
|
|
|
|
* checks on it
|
|
|
|
*
|
|
|
|
* Return 0 on success, <0 on failure
|
|
|
|
*/
|
|
|
|
static int __init acpi_fadt_sanity_check(void)
|
ARM64 / ACPI: Get RSDP and ACPI boot-time tables
As we want to get ACPI tables to parse and then use the information
for system initialization, we should get the RSDP (Root System
Description Pointer) first, it then locates Extended Root Description
Table (XSDT) which contains all the 64-bit physical address that
pointer to other boot-time tables.
Introduce acpi.c and its related head file in this patch to provide
fundamental needs of extern variables and functions for ACPI core,
and then get boot-time tables as needed.
- asm/acenv.h for arch specific ACPICA environments and
implementation, It is needed unconditionally by ACPI core;
- asm/acpi.h for arch specific variables and functions needed by
ACPI driver core;
- acpi.c for ARM64 related ACPI implementation for ACPI driver
core;
acpi_boot_table_init() is introduced to get RSDP and boot-time tables,
it will be called in setup_arch() before paging_init(), so we should
use eary_memremap() mechanism here to get the RSDP and all the table
pointers.
FADT Major.Minor version was introduced in ACPI 5.1, it is the same
as ACPI version.
In ACPI 5.1, some major gaps are fixed for ARM, such as updates in
MADT table for GIC and SMP init, without those updates, we can not
get the MPIDR for SMP init, and GICv2/3 related init information, so
we can't boot arm64 ACPI properly with table versions predating 5.1.
If firmware provides ACPI tables with ACPI version less than 5.1,
OS has no way to retrieve the configuration data that is necessary
to init SMP boot protocol and the GIC properly, so disable ACPI if
we get an FADT table with version less that 5.1 when acpi_boot_table_init()
called.
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will.deacon@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Tested-by: Yijing Wang <wangyijing@huawei.com>
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: Jon Masters <jcm@redhat.com>
Tested-by: Timur Tabi <timur@codeaurora.org>
Tested-by: Robert Richter <rrichter@cavium.com>
Acked-by: Robert Richter <rrichter@cavium.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Al Stone <al.stone@linaro.org>
Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-03-24 08:02:37 -06:00
|
|
|
{
|
2015-03-25 09:13:56 -06:00
|
|
|
struct acpi_table_header *table;
|
|
|
|
struct acpi_table_fadt *fadt;
|
|
|
|
acpi_status status;
|
|
|
|
acpi_size tbl_size;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* FADT is required on arm64; retrieve it to check its presence
|
|
|
|
* and carry out revision and ACPI HW reduced compliancy tests
|
|
|
|
*/
|
|
|
|
status = acpi_get_table_with_size(ACPI_SIG_FADT, 0, &table, &tbl_size);
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
|
|
const char *msg = acpi_format_exception(status);
|
|
|
|
|
|
|
|
pr_err("Failed to get FADT table, %s\n", msg);
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
fadt = (struct acpi_table_fadt *)table;
|
ARM64 / ACPI: Get RSDP and ACPI boot-time tables
As we want to get ACPI tables to parse and then use the information
for system initialization, we should get the RSDP (Root System
Description Pointer) first, it then locates Extended Root Description
Table (XSDT) which contains all the 64-bit physical address that
pointer to other boot-time tables.
Introduce acpi.c and its related head file in this patch to provide
fundamental needs of extern variables and functions for ACPI core,
and then get boot-time tables as needed.
- asm/acenv.h for arch specific ACPICA environments and
implementation, It is needed unconditionally by ACPI core;
- asm/acpi.h for arch specific variables and functions needed by
ACPI driver core;
- acpi.c for ARM64 related ACPI implementation for ACPI driver
core;
acpi_boot_table_init() is introduced to get RSDP and boot-time tables,
it will be called in setup_arch() before paging_init(), so we should
use eary_memremap() mechanism here to get the RSDP and all the table
pointers.
FADT Major.Minor version was introduced in ACPI 5.1, it is the same
as ACPI version.
In ACPI 5.1, some major gaps are fixed for ARM, such as updates in
MADT table for GIC and SMP init, without those updates, we can not
get the MPIDR for SMP init, and GICv2/3 related init information, so
we can't boot arm64 ACPI properly with table versions predating 5.1.
If firmware provides ACPI tables with ACPI version less than 5.1,
OS has no way to retrieve the configuration data that is necessary
to init SMP boot protocol and the GIC properly, so disable ACPI if
we get an FADT table with version less that 5.1 when acpi_boot_table_init()
called.
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will.deacon@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Tested-by: Yijing Wang <wangyijing@huawei.com>
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: Jon Masters <jcm@redhat.com>
Tested-by: Timur Tabi <timur@codeaurora.org>
Tested-by: Robert Richter <rrichter@cavium.com>
Acked-by: Robert Richter <rrichter@cavium.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Al Stone <al.stone@linaro.org>
Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-03-24 08:02:37 -06:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Revision in table header is the FADT Major revision, and there
|
|
|
|
* is a minor revision of FADT which was introduced by ACPI 5.1,
|
|
|
|
* we only deal with ACPI 5.1 or newer revision to get GIC and SMP
|
2015-03-25 09:13:56 -06:00
|
|
|
* boot protocol configuration data.
|
ARM64 / ACPI: Get RSDP and ACPI boot-time tables
As we want to get ACPI tables to parse and then use the information
for system initialization, we should get the RSDP (Root System
Description Pointer) first, it then locates Extended Root Description
Table (XSDT) which contains all the 64-bit physical address that
pointer to other boot-time tables.
Introduce acpi.c and its related head file in this patch to provide
fundamental needs of extern variables and functions for ACPI core,
and then get boot-time tables as needed.
- asm/acenv.h for arch specific ACPICA environments and
implementation, It is needed unconditionally by ACPI core;
- asm/acpi.h for arch specific variables and functions needed by
ACPI driver core;
- acpi.c for ARM64 related ACPI implementation for ACPI driver
core;
acpi_boot_table_init() is introduced to get RSDP and boot-time tables,
it will be called in setup_arch() before paging_init(), so we should
use eary_memremap() mechanism here to get the RSDP and all the table
pointers.
FADT Major.Minor version was introduced in ACPI 5.1, it is the same
as ACPI version.
In ACPI 5.1, some major gaps are fixed for ARM, such as updates in
MADT table for GIC and SMP init, without those updates, we can not
get the MPIDR for SMP init, and GICv2/3 related init information, so
we can't boot arm64 ACPI properly with table versions predating 5.1.
If firmware provides ACPI tables with ACPI version less than 5.1,
OS has no way to retrieve the configuration data that is necessary
to init SMP boot protocol and the GIC properly, so disable ACPI if
we get an FADT table with version less that 5.1 when acpi_boot_table_init()
called.
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will.deacon@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Tested-by: Yijing Wang <wangyijing@huawei.com>
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: Jon Masters <jcm@redhat.com>
Tested-by: Timur Tabi <timur@codeaurora.org>
Tested-by: Robert Richter <rrichter@cavium.com>
Acked-by: Robert Richter <rrichter@cavium.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Al Stone <al.stone@linaro.org>
Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-03-24 08:02:37 -06:00
|
|
|
*/
|
2015-03-25 09:13:56 -06:00
|
|
|
if (table->revision < 5 ||
|
|
|
|
(table->revision == 5 && fadt->minor_revision < 1)) {
|
|
|
|
pr_err("Unsupported FADT revision %d.%d, should be 5.1+\n",
|
|
|
|
table->revision, fadt->minor_revision);
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto out;
|
2015-03-24 08:02:45 -06:00
|
|
|
}
|
ARM64 / ACPI: Get RSDP and ACPI boot-time tables
As we want to get ACPI tables to parse and then use the information
for system initialization, we should get the RSDP (Root System
Description Pointer) first, it then locates Extended Root Description
Table (XSDT) which contains all the 64-bit physical address that
pointer to other boot-time tables.
Introduce acpi.c and its related head file in this patch to provide
fundamental needs of extern variables and functions for ACPI core,
and then get boot-time tables as needed.
- asm/acenv.h for arch specific ACPICA environments and
implementation, It is needed unconditionally by ACPI core;
- asm/acpi.h for arch specific variables and functions needed by
ACPI driver core;
- acpi.c for ARM64 related ACPI implementation for ACPI driver
core;
acpi_boot_table_init() is introduced to get RSDP and boot-time tables,
it will be called in setup_arch() before paging_init(), so we should
use eary_memremap() mechanism here to get the RSDP and all the table
pointers.
FADT Major.Minor version was introduced in ACPI 5.1, it is the same
as ACPI version.
In ACPI 5.1, some major gaps are fixed for ARM, such as updates in
MADT table for GIC and SMP init, without those updates, we can not
get the MPIDR for SMP init, and GICv2/3 related init information, so
we can't boot arm64 ACPI properly with table versions predating 5.1.
If firmware provides ACPI tables with ACPI version less than 5.1,
OS has no way to retrieve the configuration data that is necessary
to init SMP boot protocol and the GIC properly, so disable ACPI if
we get an FADT table with version less that 5.1 when acpi_boot_table_init()
called.
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will.deacon@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Tested-by: Yijing Wang <wangyijing@huawei.com>
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: Jon Masters <jcm@redhat.com>
Tested-by: Timur Tabi <timur@codeaurora.org>
Tested-by: Robert Richter <rrichter@cavium.com>
Acked-by: Robert Richter <rrichter@cavium.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Al Stone <al.stone@linaro.org>
Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-03-24 08:02:37 -06:00
|
|
|
|
2015-03-25 09:13:56 -06:00
|
|
|
if (!(fadt->flags & ACPI_FADT_HW_REDUCED)) {
|
|
|
|
pr_err("FADT not ACPI hardware reduced compliant\n");
|
|
|
|
ret = -EINVAL;
|
|
|
|
}
|
ARM64 / ACPI: Get RSDP and ACPI boot-time tables
As we want to get ACPI tables to parse and then use the information
for system initialization, we should get the RSDP (Root System
Description Pointer) first, it then locates Extended Root Description
Table (XSDT) which contains all the 64-bit physical address that
pointer to other boot-time tables.
Introduce acpi.c and its related head file in this patch to provide
fundamental needs of extern variables and functions for ACPI core,
and then get boot-time tables as needed.
- asm/acenv.h for arch specific ACPICA environments and
implementation, It is needed unconditionally by ACPI core;
- asm/acpi.h for arch specific variables and functions needed by
ACPI driver core;
- acpi.c for ARM64 related ACPI implementation for ACPI driver
core;
acpi_boot_table_init() is introduced to get RSDP and boot-time tables,
it will be called in setup_arch() before paging_init(), so we should
use eary_memremap() mechanism here to get the RSDP and all the table
pointers.
FADT Major.Minor version was introduced in ACPI 5.1, it is the same
as ACPI version.
In ACPI 5.1, some major gaps are fixed for ARM, such as updates in
MADT table for GIC and SMP init, without those updates, we can not
get the MPIDR for SMP init, and GICv2/3 related init information, so
we can't boot arm64 ACPI properly with table versions predating 5.1.
If firmware provides ACPI tables with ACPI version less than 5.1,
OS has no way to retrieve the configuration data that is necessary
to init SMP boot protocol and the GIC properly, so disable ACPI if
we get an FADT table with version less that 5.1 when acpi_boot_table_init()
called.
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will.deacon@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Tested-by: Yijing Wang <wangyijing@huawei.com>
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: Jon Masters <jcm@redhat.com>
Tested-by: Timur Tabi <timur@codeaurora.org>
Tested-by: Robert Richter <rrichter@cavium.com>
Acked-by: Robert Richter <rrichter@cavium.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Al Stone <al.stone@linaro.org>
Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-03-24 08:02:37 -06:00
|
|
|
|
2015-03-25 09:13:56 -06:00
|
|
|
out:
|
|
|
|
/*
|
|
|
|
* acpi_get_table_with_size() creates FADT table mapping that
|
|
|
|
* should be released after parsing and before resuming boot
|
|
|
|
*/
|
|
|
|
early_acpi_os_unmap_memory(table, tbl_size);
|
|
|
|
return ret;
|
ARM64 / ACPI: Get RSDP and ACPI boot-time tables
As we want to get ACPI tables to parse and then use the information
for system initialization, we should get the RSDP (Root System
Description Pointer) first, it then locates Extended Root Description
Table (XSDT) which contains all the 64-bit physical address that
pointer to other boot-time tables.
Introduce acpi.c and its related head file in this patch to provide
fundamental needs of extern variables and functions for ACPI core,
and then get boot-time tables as needed.
- asm/acenv.h for arch specific ACPICA environments and
implementation, It is needed unconditionally by ACPI core;
- asm/acpi.h for arch specific variables and functions needed by
ACPI driver core;
- acpi.c for ARM64 related ACPI implementation for ACPI driver
core;
acpi_boot_table_init() is introduced to get RSDP and boot-time tables,
it will be called in setup_arch() before paging_init(), so we should
use eary_memremap() mechanism here to get the RSDP and all the table
pointers.
FADT Major.Minor version was introduced in ACPI 5.1, it is the same
as ACPI version.
In ACPI 5.1, some major gaps are fixed for ARM, such as updates in
MADT table for GIC and SMP init, without those updates, we can not
get the MPIDR for SMP init, and GICv2/3 related init information, so
we can't boot arm64 ACPI properly with table versions predating 5.1.
If firmware provides ACPI tables with ACPI version less than 5.1,
OS has no way to retrieve the configuration data that is necessary
to init SMP boot protocol and the GIC properly, so disable ACPI if
we get an FADT table with version less that 5.1 when acpi_boot_table_init()
called.
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will.deacon@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Tested-by: Yijing Wang <wangyijing@huawei.com>
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: Jon Masters <jcm@redhat.com>
Tested-by: Timur Tabi <timur@codeaurora.org>
Tested-by: Robert Richter <rrichter@cavium.com>
Acked-by: Robert Richter <rrichter@cavium.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Al Stone <al.stone@linaro.org>
Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-03-24 08:02:37 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* acpi_boot_table_init() called from setup_arch(), always.
|
|
|
|
* 1. find RSDP and get its address, and then find XSDT
|
|
|
|
* 2. extract all tables and checksums them all
|
|
|
|
* 3. check ACPI FADT revision
|
2015-03-25 09:13:56 -06:00
|
|
|
* 4. check ACPI FADT HW reduced flag
|
ARM64 / ACPI: Get RSDP and ACPI boot-time tables
As we want to get ACPI tables to parse and then use the information
for system initialization, we should get the RSDP (Root System
Description Pointer) first, it then locates Extended Root Description
Table (XSDT) which contains all the 64-bit physical address that
pointer to other boot-time tables.
Introduce acpi.c and its related head file in this patch to provide
fundamental needs of extern variables and functions for ACPI core,
and then get boot-time tables as needed.
- asm/acenv.h for arch specific ACPICA environments and
implementation, It is needed unconditionally by ACPI core;
- asm/acpi.h for arch specific variables and functions needed by
ACPI driver core;
- acpi.c for ARM64 related ACPI implementation for ACPI driver
core;
acpi_boot_table_init() is introduced to get RSDP and boot-time tables,
it will be called in setup_arch() before paging_init(), so we should
use eary_memremap() mechanism here to get the RSDP and all the table
pointers.
FADT Major.Minor version was introduced in ACPI 5.1, it is the same
as ACPI version.
In ACPI 5.1, some major gaps are fixed for ARM, such as updates in
MADT table for GIC and SMP init, without those updates, we can not
get the MPIDR for SMP init, and GICv2/3 related init information, so
we can't boot arm64 ACPI properly with table versions predating 5.1.
If firmware provides ACPI tables with ACPI version less than 5.1,
OS has no way to retrieve the configuration data that is necessary
to init SMP boot protocol and the GIC properly, so disable ACPI if
we get an FADT table with version less that 5.1 when acpi_boot_table_init()
called.
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will.deacon@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Tested-by: Yijing Wang <wangyijing@huawei.com>
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: Jon Masters <jcm@redhat.com>
Tested-by: Timur Tabi <timur@codeaurora.org>
Tested-by: Robert Richter <rrichter@cavium.com>
Acked-by: Robert Richter <rrichter@cavium.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Al Stone <al.stone@linaro.org>
Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-03-24 08:02:37 -06:00
|
|
|
*
|
|
|
|
* We can parse ACPI boot-time tables such as MADT after
|
|
|
|
* this function is called.
|
2015-03-25 09:13:56 -06:00
|
|
|
*
|
|
|
|
* ACPI is enabled on return if ACPI tables initialized and sanity checks
|
|
|
|
* passed, disabled otherwise
|
ARM64 / ACPI: Get RSDP and ACPI boot-time tables
As we want to get ACPI tables to parse and then use the information
for system initialization, we should get the RSDP (Root System
Description Pointer) first, it then locates Extended Root Description
Table (XSDT) which contains all the 64-bit physical address that
pointer to other boot-time tables.
Introduce acpi.c and its related head file in this patch to provide
fundamental needs of extern variables and functions for ACPI core,
and then get boot-time tables as needed.
- asm/acenv.h for arch specific ACPICA environments and
implementation, It is needed unconditionally by ACPI core;
- asm/acpi.h for arch specific variables and functions needed by
ACPI driver core;
- acpi.c for ARM64 related ACPI implementation for ACPI driver
core;
acpi_boot_table_init() is introduced to get RSDP and boot-time tables,
it will be called in setup_arch() before paging_init(), so we should
use eary_memremap() mechanism here to get the RSDP and all the table
pointers.
FADT Major.Minor version was introduced in ACPI 5.1, it is the same
as ACPI version.
In ACPI 5.1, some major gaps are fixed for ARM, such as updates in
MADT table for GIC and SMP init, without those updates, we can not
get the MPIDR for SMP init, and GICv2/3 related init information, so
we can't boot arm64 ACPI properly with table versions predating 5.1.
If firmware provides ACPI tables with ACPI version less than 5.1,
OS has no way to retrieve the configuration data that is necessary
to init SMP boot protocol and the GIC properly, so disable ACPI if
we get an FADT table with version less that 5.1 when acpi_boot_table_init()
called.
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will.deacon@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Tested-by: Yijing Wang <wangyijing@huawei.com>
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: Jon Masters <jcm@redhat.com>
Tested-by: Timur Tabi <timur@codeaurora.org>
Tested-by: Robert Richter <rrichter@cavium.com>
Acked-by: Robert Richter <rrichter@cavium.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Al Stone <al.stone@linaro.org>
Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-03-24 08:02:37 -06:00
|
|
|
*/
|
|
|
|
void __init acpi_boot_table_init(void)
|
|
|
|
{
|
2015-03-24 08:02:41 -06:00
|
|
|
/*
|
|
|
|
* Enable ACPI instead of device tree unless
|
|
|
|
* - ACPI has been disabled explicitly (acpi=off), or
|
|
|
|
* - the device tree is not empty (it has more than just a /chosen node)
|
|
|
|
* and ACPI has not been force enabled (acpi=force)
|
|
|
|
*/
|
|
|
|
if (param_acpi_off ||
|
|
|
|
(!param_acpi_force && of_scan_flat_dt(dt_scan_depth1_nodes, NULL)))
|
ARM64 / ACPI: Get RSDP and ACPI boot-time tables
As we want to get ACPI tables to parse and then use the information
for system initialization, we should get the RSDP (Root System
Description Pointer) first, it then locates Extended Root Description
Table (XSDT) which contains all the 64-bit physical address that
pointer to other boot-time tables.
Introduce acpi.c and its related head file in this patch to provide
fundamental needs of extern variables and functions for ACPI core,
and then get boot-time tables as needed.
- asm/acenv.h for arch specific ACPICA environments and
implementation, It is needed unconditionally by ACPI core;
- asm/acpi.h for arch specific variables and functions needed by
ACPI driver core;
- acpi.c for ARM64 related ACPI implementation for ACPI driver
core;
acpi_boot_table_init() is introduced to get RSDP and boot-time tables,
it will be called in setup_arch() before paging_init(), so we should
use eary_memremap() mechanism here to get the RSDP and all the table
pointers.
FADT Major.Minor version was introduced in ACPI 5.1, it is the same
as ACPI version.
In ACPI 5.1, some major gaps are fixed for ARM, such as updates in
MADT table for GIC and SMP init, without those updates, we can not
get the MPIDR for SMP init, and GICv2/3 related init information, so
we can't boot arm64 ACPI properly with table versions predating 5.1.
If firmware provides ACPI tables with ACPI version less than 5.1,
OS has no way to retrieve the configuration data that is necessary
to init SMP boot protocol and the GIC properly, so disable ACPI if
we get an FADT table with version less that 5.1 when acpi_boot_table_init()
called.
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will.deacon@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Tested-by: Yijing Wang <wangyijing@huawei.com>
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: Jon Masters <jcm@redhat.com>
Tested-by: Timur Tabi <timur@codeaurora.org>
Tested-by: Robert Richter <rrichter@cavium.com>
Acked-by: Robert Richter <rrichter@cavium.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Al Stone <al.stone@linaro.org>
Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-03-24 08:02:37 -06:00
|
|
|
return;
|
|
|
|
|
2015-03-25 09:13:56 -06:00
|
|
|
/*
|
|
|
|
* ACPI is disabled at this point. Enable it in order to parse
|
|
|
|
* the ACPI tables and carry out sanity checks
|
|
|
|
*/
|
2015-03-24 08:02:41 -06:00
|
|
|
enable_acpi();
|
|
|
|
|
2015-03-25 09:13:56 -06:00
|
|
|
/*
|
|
|
|
* If ACPI tables are initialized and FADT sanity checks passed,
|
|
|
|
* leave ACPI enabled and carry on booting; otherwise disable ACPI
|
|
|
|
* on initialization error.
|
|
|
|
*/
|
|
|
|
if (acpi_table_init() || acpi_fadt_sanity_check()) {
|
|
|
|
pr_err("Failed to init ACPI tables\n");
|
ARM64 / ACPI: Get RSDP and ACPI boot-time tables
As we want to get ACPI tables to parse and then use the information
for system initialization, we should get the RSDP (Root System
Description Pointer) first, it then locates Extended Root Description
Table (XSDT) which contains all the 64-bit physical address that
pointer to other boot-time tables.
Introduce acpi.c and its related head file in this patch to provide
fundamental needs of extern variables and functions for ACPI core,
and then get boot-time tables as needed.
- asm/acenv.h for arch specific ACPICA environments and
implementation, It is needed unconditionally by ACPI core;
- asm/acpi.h for arch specific variables and functions needed by
ACPI driver core;
- acpi.c for ARM64 related ACPI implementation for ACPI driver
core;
acpi_boot_table_init() is introduced to get RSDP and boot-time tables,
it will be called in setup_arch() before paging_init(), so we should
use eary_memremap() mechanism here to get the RSDP and all the table
pointers.
FADT Major.Minor version was introduced in ACPI 5.1, it is the same
as ACPI version.
In ACPI 5.1, some major gaps are fixed for ARM, such as updates in
MADT table for GIC and SMP init, without those updates, we can not
get the MPIDR for SMP init, and GICv2/3 related init information, so
we can't boot arm64 ACPI properly with table versions predating 5.1.
If firmware provides ACPI tables with ACPI version less than 5.1,
OS has no way to retrieve the configuration data that is necessary
to init SMP boot protocol and the GIC properly, so disable ACPI if
we get an FADT table with version less that 5.1 when acpi_boot_table_init()
called.
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will.deacon@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Tested-by: Yijing Wang <wangyijing@huawei.com>
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: Jon Masters <jcm@redhat.com>
Tested-by: Timur Tabi <timur@codeaurora.org>
Tested-by: Robert Richter <rrichter@cavium.com>
Acked-by: Robert Richter <rrichter@cavium.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Al Stone <al.stone@linaro.org>
Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-03-24 08:02:37 -06:00
|
|
|
disable_acpi();
|
|
|
|
}
|
|
|
|
}
|
2015-03-24 08:02:49 -06:00
|
|
|
|
|
|
|
void __init acpi_gic_init(void)
|
|
|
|
{
|
|
|
|
struct acpi_table_header *table;
|
|
|
|
acpi_status status;
|
|
|
|
acpi_size tbl_size;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
if (acpi_disabled)
|
|
|
|
return;
|
|
|
|
|
|
|
|
status = acpi_get_table_with_size(ACPI_SIG_MADT, 0, &table, &tbl_size);
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
|
|
const char *msg = acpi_format_exception(status);
|
|
|
|
|
|
|
|
pr_err("Failed to get MADT table, %s\n", msg);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = gic_v2_acpi_init(table);
|
|
|
|
if (err)
|
|
|
|
pr_err("Failed to initialize GIC IRQ controller");
|
|
|
|
|
|
|
|
early_acpi_os_unmap_memory((char *)table, tbl_size);
|
|
|
|
}
|