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Diffstat (limited to 'kernel/arch/arm64/include/asm/acpi.h')
| -rw-r--r-- | kernel/arch/arm64/include/asm/acpi.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/kernel/arch/arm64/include/asm/acpi.h b/kernel/arch/arm64/include/asm/acpi.h new file mode 100644 index 000000000..59c05d8ea --- /dev/null +++ b/kernel/arch/arm64/include/asm/acpi.h @@ -0,0 +1,96 @@ +/* + * 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*/ |