root/arch/arm64/include/asm/acpi.h

INCLUDED FROM

DEFINITIONS

1. acpi_os_ioremap
2. disable_acpi
3. enable_acpi
4. acpi_has_cpu_in_madt
5. get_acpi_id_for_cpu
6. arch_fix_phys_package_id
7. acpi_init_cpus
8. apei_claim_sea
9. acpi_parking_protocol_valid
10. acpi_set_mailbox_entry
11. acpi_get_enable_method
12. arch_apei_get_mem_attribute
13. arm64_acpi_numa_init
14. acpi_numa_get_nid
15. acpi_map_cpus_to_nodes

   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 static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
  51                                             acpi_size size)
  52 {
  53         /* For normal memory we already have a cacheable mapping. */
  54         if (memblock_is_map_memory(phys))
  55                 return (void __iomem *)__phys_to_virt(phys);
  56 
  57         /*
  58          * We should still honor the memory's attribute here because
  59          * crash dump kernel possibly excludes some ACPI (reclaim)
  60          * regions from memblock list.
  61          */
  62         return __ioremap(phys, size, __acpi_get_mem_attribute(phys));
  63 }
  64 #define acpi_os_ioremap acpi_os_ioremap
  65 
  66 typedef u64 phys_cpuid_t;
  67 #define PHYS_CPUID_INVALID INVALID_HWID
  68 
  69 #define acpi_strict 1   /* No out-of-spec workarounds on ARM64 */
  70 extern int acpi_disabled;
  71 extern int acpi_noirq;
  72 extern int acpi_pci_disabled;
  73 
  74 static inline void disable_acpi(void)
  75 {
  76         acpi_disabled = 1;
  77         acpi_pci_disabled = 1;
  78         acpi_noirq = 1;
  79 }
  80 
  81 static inline void enable_acpi(void)
  82 {
  83         acpi_disabled = 0;
  84         acpi_pci_disabled = 0;
  85         acpi_noirq = 0;
  86 }
  87 
  88 /*
  89  * The ACPI processor driver for ACPI core code needs this macro
  90  * to find out this cpu was already mapped (mapping from CPU hardware
  91  * ID to CPU logical ID) or not.
  92  */
  93 #define cpu_physical_id(cpu) cpu_logical_map(cpu)
  94 
  95 /*
  96  * It's used from ACPI core in kdump to boot UP system with SMP kernel,
  97  * with this check the ACPI core will not override the CPU index
  98  * obtained from GICC with 0 and not print some error message as well.
  99  * Since MADT must provide at least one GICC structure for GIC
 100  * initialization, CPU will be always available in MADT on ARM64.
 101  */
 102 static inline bool acpi_has_cpu_in_madt(void)
 103 {
 104         return true;
 105 }
 106 
 107 struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu);
 108 static inline u32 get_acpi_id_for_cpu(unsigned int cpu)
 109 {
 110         return  acpi_cpu_get_madt_gicc(cpu)->uid;
 111 }
 112 
 113 static inline void arch_fix_phys_package_id(int num, u32 slot) { }
 114 void __init acpi_init_cpus(void);
 115 int apei_claim_sea(struct pt_regs *regs);
 116 #else
 117 static inline void acpi_init_cpus(void) { }
 118 static inline int apei_claim_sea(struct pt_regs *regs) { return -ENOENT; }
 119 #endif /* CONFIG_ACPI */
 120 
 121 #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
 122 bool acpi_parking_protocol_valid(int cpu);
 123 void __init
 124 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor);
 125 #else
 126 static inline bool acpi_parking_protocol_valid(int cpu) { return false; }
 127 static inline void
 128 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor)
 129 {}
 130 #endif
 131 
 132 static inline const char *acpi_get_enable_method(int cpu)
 133 {
 134         if (acpi_psci_present())
 135                 return "psci";
 136 
 137         if (acpi_parking_protocol_valid(cpu))
 138                 return "parking-protocol";
 139 
 140         return NULL;
 141 }
 142 
 143 #ifdef  CONFIG_ACPI_APEI
 144 /*
 145  * acpi_disable_cmcff is used in drivers/acpi/apei/hest.c for disabling
 146  * IA-32 Architecture Corrected Machine Check (CMC) Firmware-First mode
 147  * with a kernel command line parameter "acpi=nocmcoff". But we don't
 148  * have this IA-32 specific feature on ARM64, this definition is only
 149  * for compatibility.
 150  */
 151 #define acpi_disable_cmcff 1
 152 static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
 153 {
 154         return __acpi_get_mem_attribute(addr);
 155 }
 156 #endif /* CONFIG_ACPI_APEI */
 157 
 158 #ifdef CONFIG_ACPI_NUMA
 159 int arm64_acpi_numa_init(void);
 160 int acpi_numa_get_nid(unsigned int cpu);
 161 void acpi_map_cpus_to_nodes(void);
 162 #else
 163 static inline int arm64_acpi_numa_init(void) { return -ENOSYS; }
 164 static inline int acpi_numa_get_nid(unsigned int cpu) { return NUMA_NO_NODE; }
 165 static inline void acpi_map_cpus_to_nodes(void) { }
 166 #endif /* CONFIG_ACPI_NUMA */
 167 
 168 #define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE
 169 
 170 #endif /*_ASM_ACPI_H*/