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/cpuidle.h> 13 #include <linux/efi.h> 14 #include <linux/memblock.h> 15 #include <linux/psci.h> 16 #include <linux/stddef.h> 17 18 #include <asm/cputype.h> 19 #include <asm/io.h> 20 #include <asm/ptrace.h> 21 #include <asm/smp_plat.h> 22 #include <asm/tlbflush.h> 23 24 /* Macros for consistency checks of the GICC subtable of MADT */ 25 26 /* 27 * MADT GICC minimum length refers to the MADT GICC structure table length as 28 * defined in the earliest ACPI version supported on arm64, ie ACPI 5.1. 29 * 30 * The efficiency_class member was added to the 31 * struct acpi_madt_generic_interrupt to represent the MADT GICC structure 32 * "Processor Power Efficiency Class" field, added in ACPI 6.0 whose offset 33 * is therefore used to delimit the MADT GICC structure minimum length 34 * appropriately. 35 */ 36 #define ACPI_MADT_GICC_MIN_LENGTH offsetof( \ 37 struct acpi_madt_generic_interrupt, efficiency_class) 38 39 #define BAD_MADT_GICC_ENTRY(entry, end) \ 40 (!(entry) || (entry)->header.length < ACPI_MADT_GICC_MIN_LENGTH || \ 41 (unsigned long)(entry) + (entry)->header.length > (end)) 42 43 #define ACPI_MADT_GICC_SPE (offsetof(struct acpi_madt_generic_interrupt, \ 44 spe_interrupt) + sizeof(u16)) 45 46 #define ACPI_MADT_GICC_TRBE (offsetof(struct acpi_madt_generic_interrupt, \ 47 trbe_interrupt) + sizeof(u16)) 48 /* 49 * Arm® Functional Fixed Hardware Specification Version 1.2. 50 * Table 2: Arm Architecture context loss flags 51 */ 52 #define CPUIDLE_CORE_CTXT BIT(0) /* Core context Lost */ 53 54 static inline unsigned int arch_get_idle_state_flags(u32 arch_flags) 55 { 56 if (arch_flags & CPUIDLE_CORE_CTXT) 57 return CPUIDLE_FLAG_TIMER_STOP; 58 59 return 0; 60 } 61 #define arch_get_idle_state_flags arch_get_idle_state_flags 62 63 #define CPUIDLE_TRACE_CTXT BIT(1) /* Trace context loss */ 64 #define CPUIDLE_GICR_CTXT BIT(2) /* GICR */ 65 #define CPUIDLE_GICD_CTXT BIT(3) /* GICD */ 66 67 /* Basic configuration for ACPI */ 68 #ifdef CONFIG_ACPI 69 pgprot_t __acpi_get_mem_attribute(phys_addr_t addr); 70 71 /* ACPI table mapping after acpi_permanent_mmap is set */ 72 void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size); 73 #define acpi_os_ioremap acpi_os_ioremap 74 75 typedef u64 phys_cpuid_t; 76 #define PHYS_CPUID_INVALID INVALID_HWID 77 78 #define acpi_strict 1 /* No out-of-spec workarounds on ARM64 */ 79 extern int acpi_disabled; 80 extern int acpi_noirq; 81 extern int acpi_pci_disabled; 82 83 static inline void disable_acpi(void) 84 { 85 acpi_disabled = 1; 86 acpi_pci_disabled = 1; 87 acpi_noirq = 1; 88 } 89 90 static inline void enable_acpi(void) 91 { 92 acpi_disabled = 0; 93 acpi_pci_disabled = 0; 94 acpi_noirq = 0; 95 } 96 97 /* 98 * The ACPI processor driver for ACPI core code needs this macro 99 * to find out this cpu was already mapped (mapping from CPU hardware 100 * ID to CPU logical ID) or not. 101 */ 102 #define cpu_physical_id(cpu) cpu_logical_map(cpu) 103 104 /* 105 * It's used from ACPI core in kdump to boot UP system with SMP kernel, 106 * with this check the ACPI core will not override the CPU index 107 * obtained from GICC with 0 and not print some error message as well. 108 * Since MADT must provide at least one GICC structure for GIC 109 * initialization, CPU will be always available in MADT on ARM64. 110 */ 111 static inline bool acpi_has_cpu_in_madt(void) 112 { 113 return true; 114 } 115 116 struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu); 117 int get_cpu_for_acpi_id(u32 uid); 118 119 static inline void arch_fix_phys_package_id(int num, u32 slot) { } 120 void __init acpi_init_cpus(void); 121 int apei_claim_sea(struct pt_regs *regs); 122 #else 123 static inline void acpi_init_cpus(void) { } 124 static inline int apei_claim_sea(struct pt_regs *regs) { return -ENOENT; } 125 #endif /* CONFIG_ACPI */ 126 127 #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL 128 bool acpi_parking_protocol_valid(int cpu); 129 void __init 130 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor); 131 #else 132 static inline bool acpi_parking_protocol_valid(int cpu) { return false; } 133 static inline void 134 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor) 135 {} 136 #endif 137 138 static __always_inline const char *acpi_get_enable_method(int cpu) 139 { 140 if (acpi_psci_present()) 141 return "psci"; 142 143 if (acpi_parking_protocol_valid(cpu)) 144 return "parking-protocol"; 145 146 return NULL; 147 } 148 149 #ifdef CONFIG_ACPI_APEI 150 /* 151 * acpi_disable_cmcff is used in drivers/acpi/apei/hest.c for disabling 152 * IA-32 Architecture Corrected Machine Check (CMC) Firmware-First mode 153 * with a kernel command line parameter "acpi=nocmcoff". But we don't 154 * have this IA-32 specific feature on ARM64, this definition is only 155 * for compatibility. 156 */ 157 #define acpi_disable_cmcff 1 158 static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr) 159 { 160 return __acpi_get_mem_attribute(addr); 161 } 162 #endif /* CONFIG_ACPI_APEI */ 163 164 #ifdef CONFIG_ACPI_NUMA 165 int arm64_acpi_numa_init(void); 166 int acpi_numa_get_nid(unsigned int cpu); 167 void acpi_map_cpus_to_nodes(void); 168 #else 169 static inline int arm64_acpi_numa_init(void) { return -ENOSYS; } 170 static inline int acpi_numa_get_nid(unsigned int cpu) { return NUMA_NO_NODE; } 171 static inline void acpi_map_cpus_to_nodes(void) { } 172 #endif /* CONFIG_ACPI_NUMA */ 173 174 #define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE 175 176 #endif /*_ASM_ACPI_H*/ 177