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Merge branch 'acpi-init'

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* acpi-init:
  clocksource: cosmetic: Drop OF 'dependency' from symbols
  clocksource / arm_arch_timer: Convert to ACPI probing
  clocksource: Add new CLKSRC_{PROBE,ACPI} config symbols
  clocksource / ACPI: Add probing infrastructure for ACPI-based clocksources
  irqchip / GIC: Convert the GIC driver to ACPI probing
  irqchip / ACPI: Add probing infrastructure for ACPI-based irqchips
  ACPI: Add early device probing infrastructure
This commit is contained in:
Rafael J. Wysocki 2015-10-25 22:55:14 +01:00
commit e3ed766b49
32 changed files with 211 additions and 161 deletions
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2
arch/arm/kernel/time.c
View File

@ -120,6 +120,6 @@ void __init time_init(void)
#ifdef CONFIG_COMMON_CLK
of_clk_init(NULL);
#endif
clocksource_of_init();
clocksource_probe();
}
}

4
arch/arm/mach-omap2/timer.c
View File

@ -647,7 +647,7 @@ static OMAP_SYS_32K_TIMER_INIT(4, 1, "timer_32k_ck", "ti,timer-alwon",
void __init omap4_local_timer_init(void)
{
omap4_sync32k_timer_init();
clocksource_of_init();
clocksource_probe();
}
#else
void __init omap4_local_timer_init(void)
@ -663,7 +663,7 @@ void __init omap5_realtime_timer_init(void)
omap4_sync32k_timer_init();
realtime_counter_init();
clocksource_of_init();
clocksource_probe();
}
#endif /* CONFIG_SOC_OMAP5 || CONFIG_SOC_DRA7XX */

2
arch/arm/mach-rockchip/rockchip.c
View File

@ -67,7 +67,7 @@ static void __init rockchip_timer_init(void)
}
of_clk_init(NULL);
clocksource_of_init();
clocksource_probe();
}
static void __init rockchip_dt_init(void)

2
arch/arm/mach-shmobile/setup-r8a7779.c
View File

@ -97,7 +97,7 @@ static u32 __init r8a7779_read_mode_pins(void)
static void __init r8a7779_init_time(void)
{
r8a7779_clocks_init(r8a7779_read_mode_pins());
clocksource_of_init();
clocksource_probe();
}
static const char *const r8a7779_compat_dt[] __initconst = {

2
arch/arm/mach-shmobile/setup-rcar-gen2.c
View File

@ -128,7 +128,7 @@ void __init rcar_gen2_timer_init(void)
#endif /* CONFIG_ARM_ARCH_TIMER */
rcar_gen2_clocks_init(mode);
clocksource_of_init();
clocksource_probe();
}
struct memory_reserve_config {

2
arch/arm/mach-spear/spear13xx.c
View File

@ -124,5 +124,5 @@ void __init spear13xx_timer_init(void)
clk_put(pclk);
spear_setup_of_timer();
clocksource_of_init();
clocksource_probe();
}

2
arch/arm/mach-sunxi/sunxi.c
View File

@ -46,7 +46,7 @@ static void __init sun6i_timer_init(void)
of_clk_init(NULL);
if (IS_ENABLED(CONFIG_RESET_CONTROLLER))
sun6i_reset_init();
clocksource_of_init();
clocksource_probe();
}
DT_MACHINE_START(SUN6I_DT, "Allwinner sun6i (A31) Family")

2
arch/arm/mach-u300/core.c
View File

@ -408,7 +408,7 @@ static const char * u300_board_compat[] = {
DT_MACHINE_START(U300_DT, "U300 S335/B335 (Device Tree)")
.map_io = u300_map_io,
.init_irq = u300_init_irq_dt,
.init_time = clocksource_of_init,
.init_time = clocksource_probe,
.init_machine = u300_init_machine_dt,
.restart = u300_restart,
.dt_compat = u300_board_compat,

2
arch/arm/mach-ux500/timer.c
View File

@ -44,5 +44,5 @@ void __init ux500_timer_init(void)
dt_fail:
clksrc_dbx500_prcmu_init(prcmu_timer_base);
clocksource_of_init();
clocksource_probe();
}

2
arch/arm/mach-zynq/common.c
View File

@ -154,7 +154,7 @@ static void __init zynq_timer_init(void)
zynq_clock_init();
of_clk_init(NULL);
clocksource_of_init();
clocksource_probe();
}
static struct map_desc zynq_cortex_a9_scu_map __initdata = {

1
arch/arm64/include/asm/acpi.h
View File

@ -12,7 +12,6 @@
#ifndef _ASM_ACPI_H
#define _ASM_ACPI_H
#include <linux/irqchip/arm-gic-acpi.h>
#include <linux/mm.h>
#include <linux/psci.h>

13
arch/arm64/include/asm/irq.h
View File

@ -1,8 +1,6 @@
#ifndef __ASM_IRQ_H
#define __ASM_IRQ_H
#include <linux/irqchip/arm-gic-acpi.h>
#include <asm-generic/irq.h>
struct pt_regs;
@ -10,15 +8,4 @@ struct pt_regs;
extern void migrate_irqs(void);
extern void set_handle_irq(void (*handle_irq)(struct pt_regs *));
static inline void acpi_irq_init(void)
{
/*
* Hardcode ACPI IRQ chip initialization to GICv2 for now.
* Proper irqchip infrastructure will be implemented along with
* incoming GICv2m|GICv3|ITS bits.
*/
acpi_gic_init();
}
#define acpi_irq_init acpi_irq_init
#endif

25
arch/arm64/kernel/acpi.c
View File

@ -205,28 +205,3 @@ void __init acpi_boot_table_init(void)
disable_acpi();
}
}
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);
}

8
arch/arm64/kernel/time.c
View File

@ -67,16 +67,10 @@ void __init time_init(void)
u32 arch_timer_rate;
of_clk_init(NULL);
clocksource_of_init();
clocksource_probe();
tick_setup_hrtimer_broadcast();
/*
* Since ACPI or FDT will only one be available in the system,
* we can use acpi_generic_timer_init() here safely
*/
acpi_generic_timer_init();
arch_timer_rate = arch_timer_get_rate();
if (!arch_timer_rate)
panic("Unable to initialise architected timer.\n");

2
arch/microblaze/kernel/setup.c
View File

@ -194,7 +194,7 @@ void __init time_init(void)
{
of_clk_init(NULL);
setup_cpuinfo_clk();
clocksource_of_init();
clocksource_probe();
}
#ifdef CONFIG_DEBUG_FS

2
arch/mips/pistachio/time.c
View File

@ -39,7 +39,7 @@ void __init plat_time_init(void)
struct clk *clk;
of_clk_init(NULL);
clocksource_of_init();
clocksource_probe();
np = of_get_cpu_node(0, NULL);
if (!np) {

2
arch/mips/ralink/clk.c
View File

@ -75,5 +75,5 @@ void __init plat_time_init(void)
pr_info("CPU Clock: %ldMHz\n", clk_get_rate(clk) / 1000000);
mips_hpt_frequency = clk_get_rate(clk) / 2;
clk_put(clk);
clocksource_of_init();
clocksource_probe();
}

2
arch/nios2/kernel/time.c
View File

@ -324,7 +324,7 @@ void __init time_init(void)
if (count < 2)
panic("%d timer is found, it needs 2 timers in system\n", count);
clocksource_of_init();
clocksource_probe();
}
CLOCKSOURCE_OF_DECLARE(nios2_timer, ALTR_TIMER_COMPATIBLE, nios2_time_init);

2
arch/xtensa/kernel/time.c
View File

@ -148,7 +148,7 @@ void __init time_init(void)
local_timer_setup(0);
setup_irq(this_cpu_ptr(&ccount_timer)->evt.irq, &timer_irqaction);
sched_clock_register(ccount_sched_clock_read, 32, ccount_freq);
clocksource_of_init();
clocksource_probe();
}
/*

39
drivers/acpi/scan.c
View File

@ -1913,3 +1913,42 @@ int __init acpi_scan_init(void)
mutex_unlock(&acpi_scan_lock);
return result;
}
static struct acpi_probe_entry *ape;
static int acpi_probe_count;
static DEFINE_SPINLOCK(acpi_probe_lock);
static int __init acpi_match_madt(struct acpi_subtable_header *header,
const unsigned long end)
{
if (!ape->subtable_valid || ape->subtable_valid(header, ape))
if (!ape->probe_subtbl(header, end))
acpi_probe_count++;
return 0;
}
int __init __acpi_probe_device_table(struct acpi_probe_entry *ap_head, int nr)
{
int count = 0;
if (acpi_disabled)
return 0;
spin_lock(&acpi_probe_lock);
for (ape = ap_head; nr; ape++, nr--) {
if (ACPI_COMPARE_NAME(ACPI_SIG_MADT, ape->id)) {
acpi_probe_count = 0;
acpi_table_parse_madt(ape->type, acpi_match_madt, 0);
count += acpi_probe_count;
} else {
int res;
res = acpi_table_parse(ape->id, ape->probe_table);
if (!res)
count++;
}
}
spin_unlock(&acpi_probe_lock);
return count;
}

9
drivers/clocksource/Kconfig
View File

@ -2,6 +2,14 @@ menu "Clock Source drivers"
config CLKSRC_OF
bool
select CLKSRC_PROBE
config CLKSRC_ACPI
bool
select CLKSRC_PROBE
config CLKSRC_PROBE
bool
config CLKSRC_I8253
bool
@ -123,6 +131,7 @@ config CLKSRC_STM32
config ARM_ARCH_TIMER
bool
select CLKSRC_OF if OF
select CLKSRC_ACPI if ACPI
config ARM_ARCH_TIMER_EVTSTREAM
bool "Support for ARM architected timer event stream generation"

2
drivers/clocksource/Makefile
View File

@ -1,4 +1,4 @@
obj-$(CONFIG_CLKSRC_OF) += clksrc-of.o
obj-$(CONFIG_CLKSRC_PROBE) += clksrc-probe.o
obj-$(CONFIG_ATMEL_PIT) += timer-atmel-pit.o
obj-$(CONFIG_ATMEL_ST) += timer-atmel-st.o
obj-$(CONFIG_ATMEL_TCB_CLKSRC) += tcb_clksrc.o

10
drivers/clocksource/arm_arch_timer.c
View File

@ -864,13 +864,5 @@ static int __init arch_timer_acpi_init(struct acpi_table_header *table)
arch_timer_init();
return 0;
}
/* Initialize all the generic timers presented in GTDT */
void __init acpi_generic_timer_init(void)
{
if (acpi_disabled)
return;
acpi_table_parse(ACPI_SIG_GTDT, arch_timer_acpi_init);
}
CLOCKSOURCE_ACPI_DECLARE(arch_timer, ACPI_SIG_GTDT, arch_timer_acpi_init);
#endif

6
drivers/clocksource/clksrc-of.c → drivers/clocksource/clksrc-probe.c
View File

@ -14,6 +14,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/acpi.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/clocksource.h>
@ -23,7 +24,7 @@ extern struct of_device_id __clksrc_of_table[];
static const struct of_device_id __clksrc_of_table_sentinel
__used __section(__clksrc_of_table_end);
void __init clocksource_of_init(void)
void __init clocksource_probe(void)
{
struct device_node *np;
const struct of_device_id *match;
@ -38,6 +39,9 @@ void __init clocksource_of_init(void)
init_func(np);
clocksources++;
}
clocksources += acpi_probe_device_table(clksrc);
if (!clocksources)
pr_crit("%s: no matching clocksources found\n", __func__);
}

71
drivers/irqchip/irq-gic.c
View File

@ -41,7 +41,6 @@
#include <linux/irqchip.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/irqchip/arm-gic.h>
#include <linux/irqchip/arm-gic-acpi.h>
#include <asm/cputype.h>
#include <asm/irq.h>
@ -1195,7 +1194,7 @@ IRQCHIP_DECLARE(msm_qgic2, "qcom,msm-qgic2", gic_of_init);
#endif
#ifdef CONFIG_ACPI
static phys_addr_t dist_phy_base, cpu_phy_base __initdata;
static phys_addr_t cpu_phy_base __initdata;
static int __init
gic_acpi_parse_madt_cpu(struct acpi_subtable_header *header,
@ -1223,60 +1222,56 @@ gic_acpi_parse_madt_cpu(struct acpi_subtable_header *header,
return 0;
}
static int __init
gic_acpi_parse_madt_distributor(struct acpi_subtable_header *header,
/* The things you have to do to just *count* something... */
static int __init acpi_dummy_func(struct acpi_subtable_header *header,
const unsigned long end)
{
struct acpi_madt_generic_distributor *dist;
dist = (struct acpi_madt_generic_distributor *)header;
if (BAD_MADT_ENTRY(dist, end))
return -EINVAL;
dist_phy_base = dist->base_address;
return 0;
}
int __init
gic_v2_acpi_init(struct acpi_table_header *table)
static bool __init acpi_gic_redist_is_present(void)
{
return acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR,
acpi_dummy_func, 0) > 0;
}
static bool __init gic_validate_dist(struct acpi_subtable_header *header,
struct acpi_probe_entry *ape)
{
struct acpi_madt_generic_distributor *dist;
dist = (struct acpi_madt_generic_distributor *)header;
return (dist->version == ape->driver_data &&
(dist->version != ACPI_MADT_GIC_VERSION_NONE ||
!acpi_gic_redist_is_present()));
}
#define ACPI_GICV2_DIST_MEM_SIZE (SZ_4K)
#define ACPI_GIC_CPU_IF_MEM_SIZE (SZ_8K)
static int __init gic_v2_acpi_init(struct acpi_subtable_header *header,
const unsigned long end)
{
struct acpi_madt_generic_distributor *dist;
void __iomem *cpu_base, *dist_base;
int count;
/* Collect CPU base addresses */
count = acpi_parse_entries(ACPI_SIG_MADT,
sizeof(struct acpi_table_madt),
gic_acpi_parse_madt_cpu, table,
ACPI_MADT_TYPE_GENERIC_INTERRUPT, 0);
count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_INTERRUPT,
gic_acpi_parse_madt_cpu, 0);
if (count <= 0) {
pr_err("No valid GICC entries exist\n");
return -EINVAL;
}
/*
* Find distributor base address. We expect one distributor entry since
* ACPI 5.1 spec neither support multi-GIC instances nor GIC cascade.
*/
count = acpi_parse_entries(ACPI_SIG_MADT,
sizeof(struct acpi_table_madt),
gic_acpi_parse_madt_distributor, table,
ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR, 0);
if (count <= 0) {
pr_err("No valid GICD entries exist\n");
return -EINVAL;
} else if (count > 1) {
pr_err("More than one GICD entry detected\n");
return -EINVAL;
}
cpu_base = ioremap(cpu_phy_base, ACPI_GIC_CPU_IF_MEM_SIZE);
if (!cpu_base) {
pr_err("Unable to map GICC registers\n");
return -ENOMEM;
}
dist_base = ioremap(dist_phy_base, ACPI_GICV2_DIST_MEM_SIZE);
dist = (struct acpi_madt_generic_distributor *)header;
dist_base = ioremap(dist->base_address, ACPI_GICV2_DIST_MEM_SIZE);
if (!dist_base) {
pr_err("Unable to map GICD registers\n");
iounmap(cpu_base);
@ -1302,4 +1297,10 @@ gic_v2_acpi_init(struct acpi_table_header *table)
acpi_irq_model = ACPI_IRQ_MODEL_GIC;
return 0;
}
IRQCHIP_ACPI_DECLARE(gic_v2, ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR,
gic_validate_dist, ACPI_MADT_GIC_VERSION_V2,
gic_v2_acpi_init);
IRQCHIP_ACPI_DECLARE(gic_v2_maybe, ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR,
gic_validate_dist, ACPI_MADT_GIC_VERSION_NONE,
gic_v2_acpi_init);
#endif

5
drivers/irqchip/irqchip.c
View File

@ -8,7 +8,7 @@
* warranty of any kind, whether express or implied.
*/
#include <linux/acpi_irq.h>
#include <linux/acpi.h>
#include <linux/init.h>
#include <linux/of_irq.h>
#include <linux/irqchip.h>
@ -27,6 +27,5 @@ extern struct of_device_id __irqchip_of_table[];
void __init irqchip_init(void)
{
of_irq_init(__irqchip_of_table);
acpi_irq_init();
acpi_probe_device_table(irqchip);
}

12
include/asm-generic/vmlinux.lds.h
View File

@ -181,6 +181,16 @@
#define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
#define EARLYCON_OF_TABLES() OF_TABLE(CONFIG_SERIAL_EARLYCON, earlycon)
#ifdef CONFIG_ACPI
#define ACPI_PROBE_TABLE(name) \
. = ALIGN(8); \
VMLINUX_SYMBOL(__##name##_acpi_probe_table) = .; \
*(__##name##_acpi_probe_table) \
VMLINUX_SYMBOL(__##name##_acpi_probe_table_end) = .;
#else
#define ACPI_PROBE_TABLE(name)
#endif
#define KERNEL_DTB() \
STRUCT_ALIGN(); \
VMLINUX_SYMBOL(__dtb_start) = .; \
@ -514,6 +524,8 @@
CPUIDLE_METHOD_OF_TABLES() \
KERNEL_DTB() \
IRQCHIP_OF_MATCH_TABLE() \
ACPI_PROBE_TABLE(irqchip) \
ACPI_PROBE_TABLE(clksrc) \
EARLYCON_TABLE() \
EARLYCON_OF_TABLES()

66
include/linux/acpi.h
View File

@ -787,6 +787,61 @@ int acpi_dev_prop_read(struct acpi_device *adev, const char *propname,
struct fwnode_handle *acpi_get_next_subnode(struct device *dev,
struct fwnode_handle *subnode);
struct acpi_probe_entry;
typedef bool (*acpi_probe_entry_validate_subtbl)(struct acpi_subtable_header *,
struct acpi_probe_entry *);
#define ACPI_TABLE_ID_LEN 5
/**
* struct acpi_probe_entry - boot-time probing entry
* @id: ACPI table name
* @type: Optional subtable type to match
* (if @id contains subtables)
* @subtable_valid: Optional callback to check the validity of
* the subtable
* @probe_table: Callback to the driver being probed when table
* match is successful
* @probe_subtbl: Callback to the driver being probed when table and
* subtable match (and optional callback is successful)
* @driver_data: Sideband data provided back to the driver
*/
struct acpi_probe_entry {
__u8 id[ACPI_TABLE_ID_LEN];
__u8 type;
acpi_probe_entry_validate_subtbl subtable_valid;
union {
acpi_tbl_table_handler probe_table;
acpi_tbl_entry_handler probe_subtbl;
};
kernel_ulong_t driver_data;
};
#define ACPI_DECLARE_PROBE_ENTRY(table, name, table_id, subtable, valid, data, fn) \
static const struct acpi_probe_entry __acpi_probe_##name \
__used __section(__##table##_acpi_probe_table) \
= { \
.id = table_id, \
.type = subtable, \
.subtable_valid = valid, \
.probe_table = (acpi_tbl_table_handler)fn, \
.driver_data = data, \
}
#define ACPI_PROBE_TABLE(name) __##name##_acpi_probe_table
#define ACPI_PROBE_TABLE_END(name) __##name##_acpi_probe_table_end
int __acpi_probe_device_table(struct acpi_probe_entry *start, int nr);
#define acpi_probe_device_table(t) \
({ \
extern struct acpi_probe_entry ACPI_PROBE_TABLE(t), \
ACPI_PROBE_TABLE_END(t); \
__acpi_probe_device_table(&ACPI_PROBE_TABLE(t), \
(&ACPI_PROBE_TABLE_END(t) - \
&ACPI_PROBE_TABLE(t))); \
})
#else
static inline int acpi_dev_get_property(struct acpi_device *adev,
const char *name, acpi_object_type type,
@ -845,6 +900,17 @@ static inline struct fwnode_handle *acpi_get_next_subnode(struct device *dev,
{
return NULL;
}
#define ACPI_DECLARE_PROBE_ENTRY(table, name, table_id, subtable, validate, data, fn) \
static const void * __acpi_table_##name[] \
__attribute__((unused)) \
= { (void *) table_id, \
(void *) subtable, \
(void *) valid, \
(void *) fn, \
(void *) data }
#define acpi_probe_device_table(t) ({ int __r = 0; __r;})
#endif
#endif /*_LINUX_ACPI_H*/

10
include/linux/acpi_irq.h
View File

@ -1,10 +0,0 @@
#ifndef _LINUX_ACPI_IRQ_H
#define _LINUX_ACPI_IRQ_H
#include <linux/irq.h>
#ifndef acpi_irq_init
static inline void acpi_irq_init(void) { }
#endif
#endif /* _LINUX_ACPI_IRQ_H */

13
include/linux/clocksource.h
View File

@ -246,16 +246,13 @@ extern int clocksource_i8253_init(void);
#define CLOCKSOURCE_OF_DECLARE(name, compat, fn) \
OF_DECLARE_1(clksrc, name, compat, fn)
#ifdef CONFIG_CLKSRC_OF
extern void clocksource_of_init(void);
#ifdef CONFIG_CLKSRC_PROBE
extern void clocksource_probe(void);
#else
static inline void clocksource_of_init(void) {}
static inline void clocksource_probe(void) {}
#endif
#ifdef CONFIG_ACPI
void acpi_generic_timer_init(void);
#else
static inline void acpi_generic_timer_init(void) { }
#endif
#define CLOCKSOURCE_ACPI_DECLARE(name, table_id, fn) \
ACPI_DECLARE_PROBE_ENTRY(clksrc, name, table_id, 0, NULL, 0, fn)
#endif /* _LINUX_CLOCKSOURCE_H */

17
include/linux/irqchip.h
View File

@ -11,6 +11,7 @@
#ifndef _LINUX_IRQCHIP_H
#define _LINUX_IRQCHIP_H
#include <linux/acpi.h>
#include <linux/of.h>
/*
@ -25,6 +26,22 @@
*/
#define IRQCHIP_DECLARE(name, compat, fn) OF_DECLARE_2(irqchip, name, compat, fn)
/*
* This macro must be used by the different irqchip drivers to declare
* the association between their version and their initialization function.
*
* @name: name that must be unique accross all IRQCHIP_ACPI_DECLARE of the
* same file.
* @subtable: Subtable to be identified in MADT
* @validate: Function to be called on that subtable to check its validity.
* Can be NULL.
* @data: data to be checked by the validate function.
* @fn: initialization function
*/
#define IRQCHIP_ACPI_DECLARE(name, subtable, validate, data, fn) \
ACPI_DECLARE_PROBE_ENTRY(irqchip, name, ACPI_SIG_MADT, \
subtable, validate, data, fn)
#ifdef CONFIG_IRQCHIP
void irqchip_init(void);
#else

31
include/linux/irqchip/arm-gic-acpi.h
View File

@ -1,31 +0,0 @@
/*
* Copyright (C) 2014, Linaro Ltd.
* Author: Tomasz Nowicki <tomasz.nowicki@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.
*/
#ifndef ARM_GIC_ACPI_H_
#define ARM_GIC_ACPI_H_
#ifdef CONFIG_ACPI
/*
* Hard code here, we can not get memory size from MADT (but FDT does),
* Actually no need to do that, because this size can be inferred
* from GIC spec.
*/
#define ACPI_GICV2_DIST_MEM_SIZE (SZ_4K)
#define ACPI_GIC_CPU_IF_MEM_SIZE (SZ_8K)
struct acpi_table_header;
int gic_v2_acpi_init(struct acpi_table_header *table);
void acpi_gic_init(void);
#else
static inline void acpi_gic_init(void) { }
#endif
#endif /* ARM_GIC_ACPI_H_ */