1 /* 2 * Copyright (C) 2013-2014, Linaro Ltd. 3 * Author: Al Stone <al.stone@linaro.org> 4 * Author: Graeme Gregory <graeme.gregory@linaro.org> 5 * Author: Hanjun Guo <hanjun.guo@linaro.org> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation; 10 */ 11 12 #ifndef _ASM_ACPI_H 13 #define _ASM_ACPI_H 14 15 #include <linux/efi.h> 16 #include <linux/memblock.h> 17 #include <linux/psci.h> 18 19 #include <asm/cputype.h> 20 #include <asm/io.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 ACPI_OFFSET( \ 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 /* Basic configuration for ACPI */ 44 #ifdef CONFIG_ACPI 45 pgprot_t __acpi_get_mem_attribute(phys_addr_t addr); 46 47 /* ACPI table mapping after acpi_permanent_mmap is set */ 48 static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys, 49 acpi_size size) 50 { 51 /* For normal memory we already have a cacheable mapping. */ 52 if (memblock_is_map_memory(phys)) 53 return (void __iomem *)__phys_to_virt(phys); 54 55 /* 56 * We should still honor the memory's attribute here because 57 * crash dump kernel possibly excludes some ACPI (reclaim) 58 * regions from memblock list. 59 */ 60 return __ioremap(phys, size, __acpi_get_mem_attribute(phys)); 61 } 62 #define acpi_os_ioremap acpi_os_ioremap 63 64 typedef u64 phys_cpuid_t; 65 #define PHYS_CPUID_INVALID INVALID_HWID 66 67 #define acpi_strict 1 /* No out-of-spec workarounds on ARM64 */ 68 extern int acpi_disabled; 69 extern int acpi_noirq; 70 extern int acpi_pci_disabled; 71 72 static inline void disable_acpi(void) 73 { 74 acpi_disabled = 1; 75 acpi_pci_disabled = 1; 76 acpi_noirq = 1; 77 } 78 79 static inline void enable_acpi(void) 80 { 81 acpi_disabled = 0; 82 acpi_pci_disabled = 0; 83 acpi_noirq = 0; 84 } 85 86 /* 87 * The ACPI processor driver for ACPI core code needs this macro 88 * to find out this cpu was already mapped (mapping from CPU hardware 89 * ID to CPU logical ID) or not. 90 */ 91 #define cpu_physical_id(cpu) cpu_logical_map(cpu) 92 93 /* 94 * It's used from ACPI core in kdump to boot UP system with SMP kernel, 95 * with this check the ACPI core will not override the CPU index 96 * obtained from GICC with 0 and not print some error message as well. 97 * Since MADT must provide at least one GICC structure for GIC 98 * initialization, CPU will be always available in MADT on ARM64. 99 */ 100 static inline bool acpi_has_cpu_in_madt(void) 101 { 102 return true; 103 } 104 105 struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu); 106 static inline u32 get_acpi_id_for_cpu(unsigned int cpu) 107 { 108 return acpi_cpu_get_madt_gicc(cpu)->uid; 109 } 110 111 static inline void arch_fix_phys_package_id(int num, u32 slot) { } 112 void __init acpi_init_cpus(void); 113 114 #else 115 static inline void acpi_init_cpus(void) { } 116 #endif /* CONFIG_ACPI */ 117 118 #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL 119 bool acpi_parking_protocol_valid(int cpu); 120 void __init 121 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor); 122 #else 123 static inline bool acpi_parking_protocol_valid(int cpu) { return false; } 124 static inline void 125 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor) 126 {} 127 #endif 128 129 static inline const char *acpi_get_enable_method(int cpu) 130 { 131 if (acpi_psci_present()) 132 return "psci"; 133 134 if (acpi_parking_protocol_valid(cpu)) 135 return "parking-protocol"; 136 137 return NULL; 138 } 139 140 #ifdef CONFIG_ACPI_APEI 141 /* 142 * acpi_disable_cmcff is used in drivers/acpi/apei/hest.c for disabling 143 * IA-32 Architecture Corrected Machine Check (CMC) Firmware-First mode 144 * with a kernel command line parameter "acpi=nocmcoff". But we don't 145 * have this IA-32 specific feature on ARM64, this definition is only 146 * for compatibility. 147 */ 148 #define acpi_disable_cmcff 1 149 static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr) 150 { 151 return __acpi_get_mem_attribute(addr); 152 } 153 #endif /* CONFIG_ACPI_APEI */ 154 155 #ifdef CONFIG_ACPI_NUMA 156 int arm64_acpi_numa_init(void); 157 int acpi_numa_get_nid(unsigned int cpu); 158 void acpi_map_cpus_to_nodes(void); 159 #else 160 static inline int arm64_acpi_numa_init(void) { return -ENOSYS; } 161 static inline int acpi_numa_get_nid(unsigned int cpu) { return NUMA_NO_NODE; } 162 static inline void acpi_map_cpus_to_nodes(void) { } 163 #endif /* CONFIG_ACPI_NUMA */ 164 165 #define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE 166 167 #endif /*_ASM_ACPI_H*/ 168