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/memblock.h> 16 #include <linux/psci.h> 17 18 #include <asm/cputype.h> 19 #include <asm/smp_plat.h> 20 21 /* Macros for consistency checks of the GICC subtable of MADT */ 22 #define ACPI_MADT_GICC_LENGTH \ 23 (acpi_gbl_FADT.header.revision < 6 ? 76 : 80) 24 25 #define BAD_MADT_GICC_ENTRY(entry, end) \ 26 (!(entry) || (unsigned long)(entry) + sizeof(*(entry)) > (end) || \ 27 (entry)->header.length != ACPI_MADT_GICC_LENGTH) 28 29 /* Basic configuration for ACPI */ 30 #ifdef CONFIG_ACPI 31 /* ACPI table mapping after acpi_gbl_permanent_mmap is set */ 32 static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys, 33 acpi_size size) 34 { 35 /* 36 * EFI's reserve_regions() call adds memory with the WB attribute 37 * to memblock via early_init_dt_add_memory_arch(). 38 */ 39 if (!memblock_is_memory(phys)) 40 return ioremap(phys, size); 41 42 return ioremap_cache(phys, size); 43 } 44 #define acpi_os_ioremap acpi_os_ioremap 45 46 typedef u64 phys_cpuid_t; 47 #define PHYS_CPUID_INVALID INVALID_HWID 48 49 #define acpi_strict 1 /* No out-of-spec workarounds on ARM64 */ 50 extern int acpi_disabled; 51 extern int acpi_noirq; 52 extern int acpi_pci_disabled; 53 54 static inline void disable_acpi(void) 55 { 56 acpi_disabled = 1; 57 acpi_pci_disabled = 1; 58 acpi_noirq = 1; 59 } 60 61 static inline void enable_acpi(void) 62 { 63 acpi_disabled = 0; 64 acpi_pci_disabled = 0; 65 acpi_noirq = 0; 66 } 67 68 /* 69 * The ACPI processor driver for ACPI core code needs this macro 70 * to find out this cpu was already mapped (mapping from CPU hardware 71 * ID to CPU logical ID) or not. 72 */ 73 #define cpu_physical_id(cpu) cpu_logical_map(cpu) 74 75 /* 76 * It's used from ACPI core in kdump to boot UP system with SMP kernel, 77 * with this check the ACPI core will not override the CPU index 78 * obtained from GICC with 0 and not print some error message as well. 79 * Since MADT must provide at least one GICC structure for GIC 80 * initialization, CPU will be always available in MADT on ARM64. 81 */ 82 static inline bool acpi_has_cpu_in_madt(void) 83 { 84 return true; 85 } 86 87 static inline void arch_fix_phys_package_id(int num, u32 slot) { } 88 void __init acpi_init_cpus(void); 89 90 #else 91 static inline void acpi_init_cpus(void) { } 92 #endif /* CONFIG_ACPI */ 93 94 #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL 95 bool acpi_parking_protocol_valid(int cpu); 96 void __init 97 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor); 98 #else 99 static inline bool acpi_parking_protocol_valid(int cpu) { return false; } 100 static inline void 101 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor) 102 {} 103 #endif 104 105 static inline const char *acpi_get_enable_method(int cpu) 106 { 107 if (acpi_psci_present()) 108 return "psci"; 109 110 if (acpi_parking_protocol_valid(cpu)) 111 return "parking-protocol"; 112 113 return NULL; 114 } 115 116 #ifdef CONFIG_ACPI_APEI 117 pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr); 118 #endif 119 120 #ifdef CONFIG_ACPI_NUMA 121 int arm64_acpi_numa_init(void); 122 int acpi_numa_get_nid(unsigned int cpu, u64 hwid); 123 #else 124 static inline int arm64_acpi_numa_init(void) { return -ENOSYS; } 125 static inline int acpi_numa_get_nid(unsigned int cpu, u64 hwid) { return NUMA_NO_NODE; } 126 #endif /* CONFIG_ACPI_NUMA */ 127 128 #define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE 129 130 #endif /*_ASM_ACPI_H*/ 131