LXR linux/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
  47pgprot_t __acpi_get_mem_attribute(phys_addr_t addr);
  48
  49/* ACPI table mapping after acpi_permanent_mmap is set */
  50void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size);
  51#define acpi_os_ioremap acpi_os_ioremap
  52
  53typedef u64 phys_cpuid_t;
  54#define PHYS_CPUID_INVALID INVALID_HWID
  55
  56#define acpi_strict 1   /* No out-of-spec workarounds on ARM64 */
  57extern int acpi_disabled;
  58extern int acpi_noirq;
  59extern int acpi_pci_disabled;
  60
  61static inline void disable_acpi(void)
  62{
  63        acpi_disabled = 1;
  64        acpi_pci_disabled = 1;
  65        acpi_noirq = 1;
  66}
  67
  68static 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 */
  89static inline bool acpi_has_cpu_in_madt(void)
  90{
  91        return true;
  92}
  93
  94struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu);
  95static inline u32 get_acpi_id_for_cpu(unsigned int cpu)
  96{
  97        return  acpi_cpu_get_madt_gicc(cpu)->uid;
  98}
  99
 100static inline void arch_fix_phys_package_id(int num, u32 slot) { }
 101void __init acpi_init_cpus(void);
 102int apei_claim_sea(struct pt_regs *regs);
 103#else
 104static inline void acpi_init_cpus(void) { }
 105static inline int apei_claim_sea(struct pt_regs *regs) { return -ENOENT; }
 106#endif /* CONFIG_ACPI */
 107
 108#ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
 109bool acpi_parking_protocol_valid(int cpu);
 110void __init
 111acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor);
 112#else
 113static inline bool acpi_parking_protocol_valid(int cpu) { return false; }
 114static inline void
 115acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor)
 116{}
 117#endif
 118
 119static 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
 139static 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
 146int arm64_acpi_numa_init(void);
 147int acpi_numa_get_nid(unsigned int cpu);
 148void acpi_map_cpus_to_nodes(void);
 149#else
 150static inline int arm64_acpi_numa_init(void) { return -ENOSYS; }
 151static inline int acpi_numa_get_nid(unsigned int cpu) { return NUMA_NO_NODE; }
 152static 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*/
 158