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/cpuidle.h>
  13 #include <linux/efi.h>
  14 #include <linux/memblock.h>
  15 #include <linux/psci.h>
  16 #include <linux/stddef.h>
  17
  18 #include <asm/cputype.h>
  19 #include <asm/io.h>
  20 #include <asm/ptrace.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   offsetof(  \
  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 #define ACPI_MADT_GICC_SPE  (offsetof(struct acpi_madt_generic_interrupt, \
  44         spe_interrupt) + sizeof(u16))
  45
  46 #define ACPI_MADT_GICC_TRBE  (offsetof(struct acpi_madt_generic_interrupt, \
  47         trbe_interrupt) + sizeof(u16))
  48 /*
  49  * Arm® Functional Fixed Hardware Specification Version 1.2.
  50  * Table 2: Arm Architecture context loss flags
  51  */
  52 #define CPUIDLE_CORE_CTXT               BIT(0) /* Core context Lost */
  53
  54 static inline unsigned int arch_get_idle_state_flags(u32 arch_flags)
  55 {
  56         if (arch_flags & CPUIDLE_CORE_CTXT)
  57                 return CPUIDLE_FLAG_TIMER_STOP;
  58
  59         return 0;
  60 }
  61 #define arch_get_idle_state_flags arch_get_idle_state_flags
  62
  63 #define CPUIDLE_TRACE_CTXT              BIT(1) /* Trace context loss */
  64 #define CPUIDLE_GICR_CTXT               BIT(2) /* GICR */
  65 #define CPUIDLE_GICD_CTXT               BIT(3) /* GICD */
  66
  67 /* Basic configuration for ACPI */
  68 #ifdef  CONFIG_ACPI
  69 pgprot_t __acpi_get_mem_attribute(phys_addr_t addr);
  70
  71 /* ACPI table mapping after acpi_permanent_mmap is set */
  72 void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size);
  73 #define acpi_os_ioremap acpi_os_ioremap
  74
  75 typedef u64 phys_cpuid_t;
  76 #define PHYS_CPUID_INVALID INVALID_HWID
  77
  78 #define acpi_strict 1   /* No out-of-spec workarounds on ARM64 */
  79 extern int acpi_disabled;
  80 extern int acpi_noirq;
  81 extern int acpi_pci_disabled;
  82
  83 static inline void disable_acpi(void)
  84 {
  85         acpi_disabled = 1;
  86         acpi_pci_disabled = 1;
  87         acpi_noirq = 1;
  88 }
  89
  90 static inline void enable_acpi(void)
  91 {
  92         acpi_disabled = 0;
  93         acpi_pci_disabled = 0;
  94         acpi_noirq = 0;
  95 }
  96
  97 /*
  98  * The ACPI processor driver for ACPI core code needs this macro
  99  * to find out this cpu was already mapped (mapping from CPU hardware
 100  * ID to CPU logical ID) or not.
 101  */
 102 #define cpu_physical_id(cpu) cpu_logical_map(cpu)
 103
 104 /*
 105  * It's used from ACPI core in kdump to boot UP system with SMP kernel,
 106  * with this check the ACPI core will not override the CPU index
 107  * obtained from GICC with 0 and not print some error message as well.
 108  * Since MADT must provide at least one GICC structure for GIC
 109  * initialization, CPU will be always available in MADT on ARM64.
 110  */
 111 static inline bool acpi_has_cpu_in_madt(void)
 112 {
 113         return true;
 114 }
 115
 116 struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu);
 117 static inline u32 get_acpi_id_for_cpu(unsigned int cpu)
 118 {
 119         return  acpi_cpu_get_madt_gicc(cpu)->uid;
 120 }
 121
 122 static inline int get_cpu_for_acpi_id(u32 uid)
 123 {
 124         int cpu;
 125
 126         for (cpu = 0; cpu < nr_cpu_ids; cpu++)
 127                 if (acpi_cpu_get_madt_gicc(cpu) &&
 128                     uid == get_acpi_id_for_cpu(cpu))
 129                         return cpu;
 130
 131         return -EINVAL;
 132 }
 133
 134 static inline void arch_fix_phys_package_id(int num, u32 slot) { }
 135 void __init acpi_init_cpus(void);
 136 int apei_claim_sea(struct pt_regs *regs);
 137 #else
 138 static inline void acpi_init_cpus(void) { }
 139 static inline int apei_claim_sea(struct pt_regs *regs) { return -ENOENT; }
 140 #endif /* CONFIG_ACPI */
 141
 142 #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
 143 bool acpi_parking_protocol_valid(int cpu);
 144 void __init
 145 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor);
 146 #else
 147 static inline bool acpi_parking_protocol_valid(int cpu) { return false; }
 148 static inline void
 149 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor)
 150 {}
 151 #endif
 152
 153 static inline const char *acpi_get_enable_method(int cpu)
 154 {
 155         if (acpi_psci_present())
 156                 return "psci";
 157
 158         if (acpi_parking_protocol_valid(cpu))
 159                 return "parking-protocol";
 160
 161         return NULL;
 162 }
 163
 164 #ifdef  CONFIG_ACPI_APEI
 165 /*
 166  * acpi_disable_cmcff is used in drivers/acpi/apei/hest.c for disabling
 167  * IA-32 Architecture Corrected Machine Check (CMC) Firmware-First mode
 168  * with a kernel command line parameter "acpi=nocmcoff". But we don't
 169  * have this IA-32 specific feature on ARM64, this definition is only
 170  * for compatibility.
 171  */
 172 #define acpi_disable_cmcff 1
 173 static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
 174 {
 175         return __acpi_get_mem_attribute(addr);
 176 }
 177 #endif /* CONFIG_ACPI_APEI */
 178
 179 #ifdef CONFIG_ACPI_NUMA
 180 int arm64_acpi_numa_init(void);
 181 int acpi_numa_get_nid(unsigned int cpu);
 182 void acpi_map_cpus_to_nodes(void);
 183 #else
 184 static inline int arm64_acpi_numa_init(void) { return -ENOSYS; }
 185 static inline int acpi_numa_get_nid(unsigned int cpu) { return NUMA_NO_NODE; }
 186 static inline void acpi_map_cpus_to_nodes(void) { }
 187 #endif /* CONFIG_ACPI_NUMA */
 188
 189 #define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE
 190
 191 #endif /*_ASM_ACPI_H*/