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