forked from Minki/linux
d60fc3892c
ACPI kernel uses MADT table for proper GIC initialization. It needs to parse GIC related subtables, collect CPU interface and distributor addresses and call driver initialization function (which is hardware abstraction agnostic). In a similar way, FDT initialize GICv1/2. NOTE: This commit allow to initialize GICv1/2 basic functionality. While now simple GICv2 init call is used, any further GIC features require generic infrastructure for proper ACPI irqchip initialization. That mechanism and stacked irqdomains to support GICv2 MSI/virtualization extension, GICv3/4 and its ITS are considered as next steps. CC: Jason Cooper <jason@lakedaemon.net> CC: Marc Zyngier <marc.zyngier@arm.com> CC: Thomas Gleixner <tglx@linutronix.de> 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: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Jason Cooper <jason@lakedaemon.net> Reviewed-by: Grant Likely <grant.likely@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>
97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/*
|
|
* 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>
|
|
*
|
|
* 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 _ASM_ACPI_H
|
|
#define _ASM_ACPI_H
|
|
|
|
#include <linux/mm.h>
|
|
#include <linux/irqchip/arm-gic-acpi.h>
|
|
|
|
#include <asm/cputype.h>
|
|
#include <asm/smp_plat.h>
|
|
|
|
/* Basic configuration for ACPI */
|
|
#ifdef CONFIG_ACPI
|
|
/* ACPI table mapping after acpi_gbl_permanent_mmap is set */
|
|
static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
|
|
acpi_size size)
|
|
{
|
|
if (!page_is_ram(phys >> PAGE_SHIFT))
|
|
return ioremap(phys, size);
|
|
|
|
return ioremap_cache(phys, size);
|
|
}
|
|
#define acpi_os_ioremap acpi_os_ioremap
|
|
|
|
typedef u64 phys_cpuid_t;
|
|
#define PHYS_CPUID_INVALID INVALID_HWID
|
|
|
|
#define acpi_strict 1 /* No out-of-spec workarounds on ARM64 */
|
|
extern int acpi_disabled;
|
|
extern int acpi_noirq;
|
|
extern int acpi_pci_disabled;
|
|
|
|
/* 1 to indicate PSCI 0.2+ is implemented */
|
|
static inline bool acpi_psci_present(void)
|
|
{
|
|
return acpi_gbl_FADT.arm_boot_flags & ACPI_FADT_PSCI_COMPLIANT;
|
|
}
|
|
|
|
/* 1 to indicate HVC must be used instead of SMC as the PSCI conduit */
|
|
static inline bool acpi_psci_use_hvc(void)
|
|
{
|
|
return acpi_gbl_FADT.arm_boot_flags & ACPI_FADT_PSCI_USE_HVC;
|
|
}
|
|
|
|
static inline void disable_acpi(void)
|
|
{
|
|
acpi_disabled = 1;
|
|
acpi_pci_disabled = 1;
|
|
acpi_noirq = 1;
|
|
}
|
|
|
|
static inline void enable_acpi(void)
|
|
{
|
|
acpi_disabled = 0;
|
|
acpi_pci_disabled = 0;
|
|
acpi_noirq = 0;
|
|
}
|
|
|
|
/*
|
|
* The ACPI processor driver for ACPI core code needs this macro
|
|
* to find out this cpu was already mapped (mapping from CPU hardware
|
|
* ID to CPU logical ID) or not.
|
|
*/
|
|
#define cpu_physical_id(cpu) cpu_logical_map(cpu)
|
|
|
|
/*
|
|
* It's used from ACPI core in kdump to boot UP system with SMP kernel,
|
|
* with this check the ACPI core will not override the CPU index
|
|
* obtained from GICC with 0 and not print some error message as well.
|
|
* Since MADT must provide at least one GICC structure for GIC
|
|
* initialization, CPU will be always available in MADT on ARM64.
|
|
*/
|
|
static inline bool acpi_has_cpu_in_madt(void)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static inline void arch_fix_phys_package_id(int num, u32 slot) { }
|
|
void __init acpi_init_cpus(void);
|
|
|
|
#else
|
|
static inline bool acpi_psci_present(void) { return false; }
|
|
static inline bool acpi_psci_use_hvc(void) { return false; }
|
|
static inline void acpi_init_cpus(void) { }
|
|
#endif /* CONFIG_ACPI */
|
|
|
|
#endif /*_ASM_ACPI_H*/
|