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
  16 #include <asm/cputype.h>
  17 #include <asm/io.h>
  18 #include <asm/ptrace.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
  24 /*
  25  * MADT GICC minimum length refers to the MADT GICC structure table length as
  26  * defined in the earliest ACPI version supported on arm64, ie ACPI 5.1.
  27  *
  28  * The efficiency_class member was added to the
  29  * struct acpi_madt_generic_interrupt to represent the MADT GICC structure
  30  * "Processor Power Efficiency Class" field, added in ACPI 6.0 whose offset
  31  * is therefore used to delimit the MADT GICC structure minimum length
  32  * appropriately.
  33  */
  34 #define ACPI_MADT_GICC_MIN_LENGTH   ACPI_OFFSET(  \
  35         struct acpi_madt_generic_interrupt, efficiency_class)
  36
  37 #define BAD_MADT_GICC_ENTRY(entry, end)                                 \
  38         (!(entry) || (entry)->header.length < ACPI_MADT_GICC_MIN_LENGTH || \
  39         (unsigned long)(entry) + (entry)->header.length > (end))
  40
  41 /* Basic configuration for ACPI */
  42 #ifdef  CONFIG_ACPI
  43 pgprot_t __acpi_get_mem_attribute(phys_addr_t addr);
  44
  45 /* ACPI table mapping after acpi_permanent_mmap is set */
  46 static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
  47                                             acpi_size size)
  48 {
  49         /* For normal memory we already have a cacheable mapping. */
  50         if (memblock_is_map_memory(phys))
  51                 return (void __iomem *)__phys_to_virt(phys);
  52
  53         /*
  54          * We should still honor the memory's attribute here because
  55          * crash dump kernel possibly excludes some ACPI (reclaim)
  56          * regions from memblock list.
  57          */
  58         return __ioremap(phys, size, __acpi_get_mem_attribute(phys));
  59 }
  60 #define acpi_os_ioremap acpi_os_ioremap
  61
  62 typedef u64 phys_cpuid_t;
  63 #define PHYS_CPUID_INVALID INVALID_HWID
  64
  65 #define acpi_strict 1   /* No out-of-spec workarounds on ARM64 */
  66 extern int acpi_disabled;
  67 extern int acpi_noirq;
  68 extern int acpi_pci_disabled;
  69
  70 static inline void disable_acpi(void)
  71 {
  72         acpi_disabled = 1;
  73         acpi_pci_disabled = 1;
  74         acpi_noirq = 1;
  75 }
  76
  77 static inline void enable_acpi(void)
  78 {
  79         acpi_disabled = 0;
  80         acpi_pci_disabled = 0;
  81         acpi_noirq = 0;
  82 }
  83
  84 /*
  85  * The ACPI processor driver for ACPI core code needs this macro
  86  * to find out this cpu was already mapped (mapping from CPU hardware
  87  * ID to CPU logical ID) or not.
  88  */
  89 #define cpu_physical_id(cpu) cpu_logical_map(cpu)
  90
  91 /*
  92  * It's used from ACPI core in kdump to boot UP system with SMP kernel,
  93  * with this check the ACPI core will not override the CPU index
  94  * obtained from GICC with 0 and not print some error message as well.
  95  * Since MADT must provide at least one GICC structure for GIC
  96  * initialization, CPU will be always available in MADT on ARM64.
  97  */
  98 static inline bool acpi_has_cpu_in_madt(void)
  99 {
 100         return true;
 101 }
 102
 103 struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu);
 104 static inline u32 get_acpi_id_for_cpu(unsigned int cpu)
 105 {
 106         return  acpi_cpu_get_madt_gicc(cpu)->uid;
 107 }
 108
 109 static inline void arch_fix_phys_package_id(int num, u32 slot) { }
 110 void __init acpi_init_cpus(void);
 111 int apei_claim_sea(struct pt_regs *regs);
 112 #else
 113 static inline void acpi_init_cpus(void) { }
 114 static inline int apei_claim_sea(struct pt_regs *regs) { return -ENOENT; }
 115 #endif /* CONFIG_ACPI */
 116
 117 #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
 118 bool acpi_parking_protocol_valid(int cpu);
 119 void __init
 120 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor);
 121 #else
 122 static inline bool acpi_parking_protocol_valid(int cpu) { return false; }
 123 static inline void
 124 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor)
 125 {}
 126 #endif
 127
 128 static inline const char *acpi_get_enable_method(int cpu)
 129 {
 130         if (acpi_psci_present())
 131                 return "psci";
 132
 133         if (acpi_parking_protocol_valid(cpu))
 134                 return "parking-protocol";
 135
 136         return NULL;
 137 }
 138
 139 #ifdef  CONFIG_ACPI_APEI
 140 /*
 141  * acpi_disable_cmcff is used in drivers/acpi/apei/hest.c for disabling
 142  * IA-32 Architecture Corrected Machine Check (CMC) Firmware-First mode
 143  * with a kernel command line parameter "acpi=nocmcoff". But we don't
 144  * have this IA-32 specific feature on ARM64, this definition is only
 145  * for compatibility.
 146  */
 147 #define acpi_disable_cmcff 1
 148 static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
 149 {
 150         return __acpi_get_mem_attribute(addr);
 151 }
 152 #endif /* CONFIG_ACPI_APEI */
 153
 154 #ifdef CONFIG_ACPI_NUMA
 155 int arm64_acpi_numa_init(void);
 156 int acpi_numa_get_nid(unsigned int cpu);
 157 void acpi_map_cpus_to_nodes(void);
 158 #else
 159 static inline int arm64_acpi_numa_init(void) { return -ENOSYS; }
 160 static inline int acpi_numa_get_nid(unsigned int cpu) { return NUMA_NO_NODE; }
 161 static inline void acpi_map_cpus_to_nodes(void) { }
 162 #endif /* CONFIG_ACPI_NUMA */
 163
 164 #define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE
 165
 166 #endif /*_ASM_ACPI_H*/