acpi.h (4721B)
1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Copyright (C) 2013-2014, Linaro Ltd. 4 * Author: Al Stone <al.stone@linaro.org> 5 * Author: Graeme Gregory <graeme.gregory@linaro.org> 6 * Author: Hanjun Guo <hanjun.guo@linaro.org> 7 */ 8 9#ifndef _ASM_ACPI_H 10#define _ASM_ACPI_H 11 12#include <linux/efi.h> 13#include <linux/memblock.h> 14#include <linux/psci.h> 15#include <linux/stddef.h> 16 17#include <asm/cputype.h> 18#include <asm/io.h> 19#include <asm/ptrace.h> 20#include <asm/smp_plat.h> 21#include <asm/tlbflush.h> 22 23/* Macros for consistency checks of the GICC subtable of MADT */ 24 25/* 26 * MADT GICC minimum length refers to the MADT GICC structure table length as 27 * defined in the earliest ACPI version supported on arm64, ie ACPI 5.1. 28 * 29 * The efficiency_class member was added to the 30 * struct acpi_madt_generic_interrupt to represent the MADT GICC structure 31 * "Processor Power Efficiency Class" field, added in ACPI 6.0 whose offset 32 * is therefore used to delimit the MADT GICC structure minimum length 33 * appropriately. 34 */ 35#define ACPI_MADT_GICC_MIN_LENGTH offsetof( \ 36 struct acpi_madt_generic_interrupt, efficiency_class) 37 38#define BAD_MADT_GICC_ENTRY(entry, end) \ 39 (!(entry) || (entry)->header.length < ACPI_MADT_GICC_MIN_LENGTH || \ 40 (unsigned long)(entry) + (entry)->header.length > (end)) 41 42#define ACPI_MADT_GICC_SPE (offsetof(struct acpi_madt_generic_interrupt, \ 43 spe_interrupt) + sizeof(u16)) 44 45/* Basic configuration for ACPI */ 46#ifdef CONFIG_ACPI 47pgprot_t __acpi_get_mem_attribute(phys_addr_t addr); 48 49/* ACPI table mapping after acpi_permanent_mmap is set */ 50void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size); 51#define acpi_os_ioremap acpi_os_ioremap 52 53typedef u64 phys_cpuid_t; 54#define PHYS_CPUID_INVALID INVALID_HWID 55 56#define acpi_strict 1 /* No out-of-spec workarounds on ARM64 */ 57extern int acpi_disabled; 58extern int acpi_noirq; 59extern int acpi_pci_disabled; 60 61static inline void disable_acpi(void) 62{ 63 acpi_disabled = 1; 64 acpi_pci_disabled = 1; 65 acpi_noirq = 1; 66} 67 68static inline void enable_acpi(void) 69{ 70 acpi_disabled = 0; 71 acpi_pci_disabled = 0; 72 acpi_noirq = 0; 73} 74 75/* 76 * The ACPI processor driver for ACPI core code needs this macro 77 * to find out this cpu was already mapped (mapping from CPU hardware 78 * ID to CPU logical ID) or not. 79 */ 80#define cpu_physical_id(cpu) cpu_logical_map(cpu) 81 82/* 83 * It's used from ACPI core in kdump to boot UP system with SMP kernel, 84 * with this check the ACPI core will not override the CPU index 85 * obtained from GICC with 0 and not print some error message as well. 86 * Since MADT must provide at least one GICC structure for GIC 87 * initialization, CPU will be always available in MADT on ARM64. 88 */ 89static inline bool acpi_has_cpu_in_madt(void) 90{ 91 return true; 92} 93 94struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu); 95static inline u32 get_acpi_id_for_cpu(unsigned int cpu) 96{ 97 return acpi_cpu_get_madt_gicc(cpu)->uid; 98} 99 100static inline void arch_fix_phys_package_id(int num, u32 slot) { } 101void __init acpi_init_cpus(void); 102int apei_claim_sea(struct pt_regs *regs); 103#else 104static inline void acpi_init_cpus(void) { } 105static inline int apei_claim_sea(struct pt_regs *regs) { return -ENOENT; } 106#endif /* CONFIG_ACPI */ 107 108#ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL 109bool acpi_parking_protocol_valid(int cpu); 110void __init 111acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor); 112#else 113static inline bool acpi_parking_protocol_valid(int cpu) { return false; } 114static inline void 115acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor) 116{} 117#endif 118 119static inline const char *acpi_get_enable_method(int cpu) 120{ 121 if (acpi_psci_present()) 122 return "psci"; 123 124 if (acpi_parking_protocol_valid(cpu)) 125 return "parking-protocol"; 126 127 return NULL; 128} 129 130#ifdef CONFIG_ACPI_APEI 131/* 132 * acpi_disable_cmcff is used in drivers/acpi/apei/hest.c for disabling 133 * IA-32 Architecture Corrected Machine Check (CMC) Firmware-First mode 134 * with a kernel command line parameter "acpi=nocmcoff". But we don't 135 * have this IA-32 specific feature on ARM64, this definition is only 136 * for compatibility. 137 */ 138#define acpi_disable_cmcff 1 139static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr) 140{ 141 return __acpi_get_mem_attribute(addr); 142} 143#endif /* CONFIG_ACPI_APEI */ 144 145#ifdef CONFIG_ACPI_NUMA 146int arm64_acpi_numa_init(void); 147int acpi_numa_get_nid(unsigned int cpu); 148void acpi_map_cpus_to_nodes(void); 149#else 150static inline int arm64_acpi_numa_init(void) { return -ENOSYS; } 151static inline int acpi_numa_get_nid(unsigned int cpu) { return NUMA_NO_NODE; } 152static inline void acpi_map_cpus_to_nodes(void) { } 153#endif /* CONFIG_ACPI_NUMA */ 154 155#define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE 156 157#endif /*_ASM_ACPI_H*/