LXR linux/arch/arm64/include/asm/acpi.h

   1/*
   2 *  Copyright (C) 2013-2014, Linaro Ltd.
   3 *      Author: Al Stone <al.stone@linaro.org>
   4 *      Author: Graeme Gregory <graeme.gregory@linaro.org>
   5 *      Author: Hanjun Guo <hanjun.guo@linaro.org>
   6 *
   7 *  This program is free software; you can redistribute it and/or modify
   8 *  it under the terms of the GNU General Public License version 2 as
   9 *  published by the Free Software Foundation;
  10 */
  11
  12#ifndef _ASM_ACPI_H
  13#define _ASM_ACPI_H
  14
  15#include <linux/mm.h>
  16#include <linux/psci.h>
  17
  18#include <asm/cputype.h>
  19#include <asm/smp_plat.h>
  20
  21/* Macros for consistency checks of the GICC subtable of MADT */
  22#define ACPI_MADT_GICC_LENGTH   \
  23        (acpi_gbl_FADT.header.revision < 6 ? 76 : 80)
  24
  25#define BAD_MADT_GICC_ENTRY(entry, end)                                         \
  26        (!(entry) || (unsigned long)(entry) + sizeof(*(entry)) > (end) ||       \
  27         (entry)->header.length != ACPI_MADT_GICC_LENGTH)
  28
  29/* Basic configuration for ACPI */
  30#ifdef  CONFIG_ACPI
  31/* ACPI table mapping after acpi_gbl_permanent_mmap is set */
  32static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
  33                                            acpi_size size)
  34{
  35        if (!page_is_ram(phys >> PAGE_SHIFT))
  36                return ioremap(phys, size);
  37
  38        return ioremap_cache(phys, size);
  39}
  40#define acpi_os_ioremap acpi_os_ioremap
  41
  42typedef u64 phys_cpuid_t;
  43#define PHYS_CPUID_INVALID INVALID_HWID
  44
  45#define acpi_strict 1   /* No out-of-spec workarounds on ARM64 */
  46extern int acpi_disabled;
  47extern int acpi_noirq;
  48extern int acpi_pci_disabled;
  49
  50static inline void disable_acpi(void)
  51{
  52        acpi_disabled = 1;
  53        acpi_pci_disabled = 1;
  54        acpi_noirq = 1;
  55}
  56
  57static inline void enable_acpi(void)
  58{
  59        acpi_disabled = 0;
  60        acpi_pci_disabled = 0;
  61        acpi_noirq = 0;
  62}
  63
  64/*
  65 * The ACPI processor driver for ACPI core code needs this macro
  66 * to find out this cpu was already mapped (mapping from CPU hardware
  67 * ID to CPU logical ID) or not.
  68 */
  69#define cpu_physical_id(cpu) cpu_logical_map(cpu)
  70
  71/*
  72 * It's used from ACPI core in kdump to boot UP system with SMP kernel,
  73 * with this check the ACPI core will not override the CPU index
  74 * obtained from GICC with 0 and not print some error message as well.
  75 * Since MADT must provide at least one GICC structure for GIC
  76 * initialization, CPU will be always available in MADT on ARM64.
  77 */
  78static inline bool acpi_has_cpu_in_madt(void)
  79{
  80        return true;
  81}
  82
  83static inline void arch_fix_phys_package_id(int num, u32 slot) { }
  84void __init acpi_init_cpus(void);
  85
  86#else
  87static inline void acpi_init_cpus(void) { }
  88#endif /* CONFIG_ACPI */
  89
  90#ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
  91bool acpi_parking_protocol_valid(int cpu);
  92void __init
  93acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor);
  94#else
  95static inline bool acpi_parking_protocol_valid(int cpu) { return false; }
  96static inline void
  97acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor)
  98{}
  99#endif
 100
 101static inline const char *acpi_get_enable_method(int cpu)
 102{
 103        if (acpi_psci_present())
 104                return "psci";
 105
 106        if (acpi_parking_protocol_valid(cpu))
 107                return "parking-protocol";
 108
 109        return NULL;
 110}
 111
 112#ifdef  CONFIG_ACPI_APEI
 113pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr);
 114#endif
 115
 116#endif /*_ASM_ACPI_H*/
 117