Linux 4.18.10
[linux/fpc-iii.git] / arch / arm64 / include / asm / acpi.h
blob0db62a4cbce2d07b14fa53542aeecfe1ffc2746f
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>
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;
12 #ifndef _ASM_ACPI_H
13 #define _ASM_ACPI_H
15 #include <linux/memblock.h>
16 #include <linux/psci.h>
18 #include <asm/cputype.h>
19 #include <asm/smp_plat.h>
20 #include <asm/tlbflush.h>
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)
26 #define BAD_MADT_GICC_ENTRY(entry, end) \
27 (!(entry) || (entry)->header.length != ACPI_MADT_GICC_LENGTH || \
28 (unsigned long)(entry) + ACPI_MADT_GICC_LENGTH > (end))
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)
37 * EFI's reserve_regions() call adds memory with the WB attribute
38 * to memblock via early_init_dt_add_memory_arch().
40 if (!memblock_is_memory(phys))
41 return ioremap(phys, size);
43 return ioremap_cache(phys, size);
45 #define acpi_os_ioremap acpi_os_ioremap
47 typedef u64 phys_cpuid_t;
48 #define PHYS_CPUID_INVALID INVALID_HWID
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;
55 static inline void disable_acpi(void)
57 acpi_disabled = 1;
58 acpi_pci_disabled = 1;
59 acpi_noirq = 1;
62 static inline void enable_acpi(void)
64 acpi_disabled = 0;
65 acpi_pci_disabled = 0;
66 acpi_noirq = 0;
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.
74 #define cpu_physical_id(cpu) cpu_logical_map(cpu)
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.
83 static inline bool acpi_has_cpu_in_madt(void)
85 return true;
88 struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu);
89 static inline u32 get_acpi_id_for_cpu(unsigned int cpu)
91 return acpi_cpu_get_madt_gicc(cpu)->uid;
94 static inline void arch_fix_phys_package_id(int num, u32 slot) { }
95 void __init acpi_init_cpus(void);
97 #else
98 static inline void acpi_init_cpus(void) { }
99 #endif /* CONFIG_ACPI */
101 #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
102 bool acpi_parking_protocol_valid(int cpu);
103 void __init
104 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor);
105 #else
106 static inline bool acpi_parking_protocol_valid(int cpu) { return false; }
107 static inline void
108 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor)
110 #endif
112 static inline const char *acpi_get_enable_method(int cpu)
114 if (acpi_psci_present())
115 return "psci";
117 if (acpi_parking_protocol_valid(cpu))
118 return "parking-protocol";
120 return NULL;
123 #ifdef CONFIG_ACPI_APEI
125 * acpi_disable_cmcff is used in drivers/acpi/apei/hest.c for disabling
126 * IA-32 Architecture Corrected Machine Check (CMC) Firmware-First mode
127 * with a kernel command line parameter "acpi=nocmcoff". But we don't
128 * have this IA-32 specific feature on ARM64, this definition is only
129 * for compatibility.
131 #define acpi_disable_cmcff 1
132 pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr);
133 #endif /* CONFIG_ACPI_APEI */
135 #ifdef CONFIG_ACPI_NUMA
136 int arm64_acpi_numa_init(void);
137 int acpi_numa_get_nid(unsigned int cpu, u64 hwid);
138 #else
139 static inline int arm64_acpi_numa_init(void) { return -ENOSYS; }
140 static inline int acpi_numa_get_nid(unsigned int cpu, u64 hwid) { return NUMA_NO_NODE; }
141 #endif /* CONFIG_ACPI_NUMA */
143 #define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE
145 #endif /*_ASM_ACPI_H*/