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 #include <asm/tlbflush.h> 21 22 /* Macros for consistency checks of the GICC subtable of MADT */ 23 #define ACPI_MADT_GICC_LENGTH \ 24 (acpi_gbl_FADT.header.revision < 6 ? 76 : 80) 25 26 #define BAD_MADT_GICC_ENTRY(entry, end) \ 27 (!(entry) || (unsigned long)(entry) + sizeof(*(entry)) > (end) || \ 28 (entry)->header.length != ACPI_MADT_GICC_LENGTH) 29 30 /* Basic configuration for ACPI */ 31 #ifdef CONFIG_ACPI 32 /* ACPI table mapping after acpi_permanent_mmap is set */ 33 static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys, 34 acpi_size size) 35 { 36 /* 37 * EFI's reserve_regions() call adds memory with the WB attribute 38 * to memblock via early_init_dt_add_memory_arch(). 39 */ 40 if (!memblock_is_memory(phys)) 41 return ioremap(phys, size); 42 43 return ioremap_cache(phys, size); 44 } 45 #define acpi_os_ioremap acpi_os_ioremap 46 47 typedef u64 phys_cpuid_t; 48 #define PHYS_CPUID_INVALID INVALID_HWID 49 50 #define acpi_strict 1 /* No out-of-spec workarounds on ARM64 */ 51 extern int acpi_disabled; 52 extern int acpi_noirq; 53 extern int acpi_pci_disabled; 54 55 static inline void disable_acpi(void) 56 { 57 acpi_disabled = 1; 58 acpi_pci_disabled = 1; 59 acpi_noirq = 1; 60 } 61 62 static inline void enable_acpi(void) 63 { 64 acpi_disabled = 0; 65 acpi_pci_disabled = 0; 66 acpi_noirq = 0; 67 } 68 69 /* 70 * The ACPI processor driver for ACPI core code needs this macro 71 * to find out this cpu was already mapped (mapping from CPU hardware 72 * ID to CPU logical ID) or not. 73 */ 74 #define cpu_physical_id(cpu) cpu_logical_map(cpu) 75 76 /* 77 * It's used from ACPI core in kdump to boot UP system with SMP kernel, 78 * with this check the ACPI core will not override the CPU index 79 * obtained from GICC with 0 and not print some error message as well. 80 * Since MADT must provide at least one GICC structure for GIC 81 * initialization, CPU will be always available in MADT on ARM64. 82 */ 83 static inline bool acpi_has_cpu_in_madt(void) 84 { 85 return true; 86 } 87 88 static inline void arch_fix_phys_package_id(int num, u32 slot) { } 89 void __init acpi_init_cpus(void); 90 91 #else 92 static inline void acpi_init_cpus(void) { } 93 #endif /* CONFIG_ACPI */ 94 95 #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL 96 bool acpi_parking_protocol_valid(int cpu); 97 void __init 98 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor); 99 #else 100 static inline bool acpi_parking_protocol_valid(int cpu) { return false; } 101 static inline void 102 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor) 103 {} 104 #endif 105 106 static inline const char *acpi_get_enable_method(int cpu) 107 { 108 if (acpi_psci_present()) 109 return "psci"; 110 111 if (acpi_parking_protocol_valid(cpu)) 112 return "parking-protocol"; 113 114 return NULL; 115 } 116 117 #ifdef CONFIG_ACPI_APEI 118 /* 119 * acpi_disable_cmcff is used in drivers/acpi/apei/hest.c for disabling 120 * IA-32 Architecture Corrected Machine Check (CMC) Firmware-First mode 121 * with a kernel command line parameter "acpi=nocmcoff". But we don't 122 * have this IA-32 specific feature on ARM64, this definition is only 123 * for compatibility. 124 */ 125 #define acpi_disable_cmcff 1 126 pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr); 127 128 /* 129 * Despite its name, this function must still broadcast the TLB 130 * invalidation in order to ensure other CPUs don't end up with junk 131 * entries as a result of speculation. Unusually, its also called in 132 * IRQ context (ghes_iounmap_irq) so if we ever need to use IPIs for 133 * TLB broadcasting, then we're in trouble here. 134 */ 135 static inline void arch_apei_flush_tlb_one(unsigned long addr) 136 { 137 flush_tlb_kernel_range(addr, addr + PAGE_SIZE); 138 } 139 #endif /* CONFIG_ACPI_APEI */ 140 141 #ifdef CONFIG_ACPI_NUMA 142 int arm64_acpi_numa_init(void); 143 int acpi_numa_get_nid(unsigned int cpu, u64 hwid); 144 #else 145 static inline int arm64_acpi_numa_init(void) { return -ENOSYS; } 146 static inline int acpi_numa_get_nid(unsigned int cpu, u64 hwid) { return NUMA_NO_NODE; } 147 #endif /* CONFIG_ACPI_NUMA */ 148 149 #define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE 150 151 #endif /*_ASM_ACPI_H*/ 152