| /* |
| * 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/psci.h> |
| |
| #include <asm/cputype.h> |
| #include <asm/smp_plat.h> |
| |
| /* Macros for consistency checks of the GICC subtable of MADT */ |
| #define ACPI_MADT_GICC_LENGTH \ |
| (acpi_gbl_FADT.header.revision < 6 ? 76 : 80) |
| |
| #define BAD_MADT_GICC_ENTRY(entry, end) \ |
| (!(entry) || (entry)->header.length != ACPI_MADT_GICC_LENGTH || \ |
| (unsigned long)(entry) + ACPI_MADT_GICC_LENGTH > (end)) |
| |
| /* 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; |
| |
| 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 void acpi_init_cpus(void) { } |
| #endif /* CONFIG_ACPI */ |
| |
| #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL |
| bool acpi_parking_protocol_valid(int cpu); |
| void __init |
| acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor); |
| #else |
| static inline bool acpi_parking_protocol_valid(int cpu) { return false; } |
| static inline void |
| acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor) |
| {} |
| #endif |
| |
| static inline const char *acpi_get_enable_method(int cpu) |
| { |
| if (acpi_psci_present()) |
| return "psci"; |
| |
| if (acpi_parking_protocol_valid(cpu)) |
| return "parking-protocol"; |
| |
| return NULL; |
| } |
| |
| #ifdef CONFIG_ACPI_APEI |
| pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr); |
| #endif |
| |
| #endif /*_ASM_ACPI_H*/ |