arch/arm64/include/asm/acpi.h

   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 #include <linux/stddef.h>
  16
  17 #include <asm/cputype.h>
  18 #include <asm/io.h>
  19 #include <asm/ptrace.h>
  20 #include <asm/smp_plat.h>
  21 #include <asm/tlbflush.h>
  22
  23 /* Macros for consistency checks of the GICC subtable of MADT */
  24
  25 /*
  26  * MADT GICC minimum length refers to the MADT GICC structure table length as
  27  * defined in the earliest ACPI version supported on arm64, ie ACPI 5.1.
  28  *
  29  * The efficiency_class member was added to the
  30  * struct acpi_madt_generic_interrupt to represent the MADT GICC structure
  31  * "Processor Power Efficiency Class" field, added in ACPI 6.0 whose offset
  32  * is therefore used to delimit the MADT GICC structure minimum length
  33  * appropriately.
  34  */
  35 #define ACPI_MADT_GICC_MIN_LENGTH   offsetof(  \
  36         struct acpi_madt_generic_interrupt, efficiency_class)
  37
  38 #define BAD_MADT_GICC_ENTRY(entry, end)                                 \
  39         (!(entry) || (entry)->header.length < ACPI_MADT_GICC_MIN_LENGTH || \
  40         (unsigned long)(entry) + (entry)->header.length > (end))
  41
  42 #define ACPI_MADT_GICC_SPE  (offsetof(struct acpi_madt_generic_interrupt, \
  43         spe_interrupt) + sizeof(u16))
  44
  45 /* Basic configuration for ACPI */
  46 #ifdef  CONFIG_ACPI
  47 pgprot_t __acpi_get_mem_attribute(phys_addr_t addr);
  48
  49 /* ACPI table mapping after acpi_permanent_mmap is set */
  50 void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size);
  51 #define acpi_os_ioremap acpi_os_ioremap
  52
  53 typedef u64 phys_cpuid_t;
  54 #define PHYS_CPUID_INVALID INVALID_HWID
  55
  56 #define acpi_strict 1   /* No out-of-spec workarounds on ARM64 */
  57 extern int acpi_disabled;
  58 extern int acpi_noirq;
  59 extern int acpi_pci_disabled;
  60
  61 static inline void disable_acpi(void)
  62 {
  63         acpi_disabled = 1;
  64         acpi_pci_disabled = 1;
  65         acpi_noirq = 1;
  66 }
  67
  68 static inline void enable_acpi(void)
  69 {
  70         acpi_disabled = 0;
  71         acpi_pci_disabled = 0;
  72         acpi_noirq = 0;
  73 }
  74
  75 /*
  76  * The ACPI processor driver for ACPI core code needs this macro
  77  * to find out this cpu was already mapped (mapping from CPU hardware
  78  * ID to CPU logical ID) or not.
  79  */
  80 #define cpu_physical_id(cpu) cpu_logical_map(cpu)
  81
  82 /*
  83  * It's used from ACPI core in kdump to boot UP system with SMP kernel,
  84  * with this check the ACPI core will not override the CPU index
  85  * obtained from GICC with 0 and not print some error message as well.
  86  * Since MADT must provide at least one GICC structure for GIC
  87  * initialization, CPU will be always available in MADT on ARM64.
  88  */
  89 static inline bool acpi_has_cpu_in_madt(void)
  90 {
  91         return true;
  92 }
  93
  94 struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu);
  95 static inline u32 get_acpi_id_for_cpu(unsigned int cpu)
  96 {
  97         return  acpi_cpu_get_madt_gicc(cpu)->uid;
  98 }
  99
 100 static inline void arch_fix_phys_package_id(int num, u32 slot) { }
 101 void __init acpi_init_cpus(void);
 102 int apei_claim_sea(struct pt_regs *regs);
 103 #else
 104 static inline void acpi_init_cpus(void) { }
 105 static inline int apei_claim_sea(struct pt_regs *regs) { return -ENOENT; }
 106 #endif /* CONFIG_ACPI */
 107
 108 #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
 109 bool acpi_parking_protocol_valid(int cpu);
 110 void __init
 111 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor);
 112 #else
 113 static inline bool acpi_parking_protocol_valid(int cpu) { return false; }
 114 static inline void
 115 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor)
 116 {}
 117 #endif
 118
 119 static inline const char *acpi_get_enable_method(int cpu)
 120 {
 121         if (acpi_psci_present())
 122                 return "psci";
 123
 124         if (acpi_parking_protocol_valid(cpu))
 125                 return "parking-protocol";
 126
 127         return NULL;
 128 }
 129
 130 #ifdef  CONFIG_ACPI_APEI
 131 /*
 132  * acpi_disable_cmcff is used in drivers/acpi/apei/hest.c for disabling
 133  * IA-32 Architecture Corrected Machine Check (CMC) Firmware-First mode
 134  * with a kernel command line parameter "acpi=nocmcoff". But we don't
 135  * have this IA-32 specific feature on ARM64, this definition is only
 136  * for compatibility.
 137  */
 138 #define acpi_disable_cmcff 1
 139 static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
 140 {
 141         return __acpi_get_mem_attribute(addr);
 142 }
 143 #endif /* CONFIG_ACPI_APEI */
 144
 145 #ifdef CONFIG_ACPI_NUMA
 146 int arm64_acpi_numa_init(void);
 147 int acpi_numa_get_nid(unsigned int cpu);
 148 void acpi_map_cpus_to_nodes(void);
 149 #else
 150 static inline int arm64_acpi_numa_init(void) { return -ENOSYS; }
 151 static inline int acpi_numa_get_nid(unsigned int cpu) { return NUMA_NO_NODE; }
 152 static inline void acpi_map_cpus_to_nodes(void) { }
 153 #endif /* CONFIG_ACPI_NUMA */
 154
 155 #define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE
 156
 157 #endif /*_ASM_ACPI_H*/