LXR linux/arch/x86/include/asm/acpi.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2#ifndef _ASM_X86_ACPI_H
   3#define _ASM_X86_ACPI_H
   4
   5/*
   6 *  Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
   7 *  Copyright (C) 2001 Patrick Mochel <mochel@osdl.org>
   8 */
   9#include <acpi/pdc_intel.h>
  10
  11#include <asm/numa.h>
  12#include <asm/fixmap.h>
  13#include <asm/processor.h>
  14#include <asm/mmu.h>
  15#include <asm/mpspec.h>
  16#include <asm/x86_init.h>
  17
  18#ifdef CONFIG_ACPI_APEI
  19# include <asm/pgtable_types.h>
  20#endif
  21
  22#ifdef CONFIG_ACPI
  23extern int acpi_lapic;
  24extern int acpi_ioapic;
  25extern int acpi_noirq;
  26extern int acpi_strict;
  27extern int acpi_disabled;
  28extern int acpi_pci_disabled;
  29extern int acpi_skip_timer_override;
  30extern int acpi_use_timer_override;
  31extern int acpi_fix_pin2_polarity;
  32extern int acpi_disable_cmcff;
  33
  34extern u8 acpi_sci_flags;
  35extern u32 acpi_sci_override_gsi;
  36void acpi_pic_sci_set_trigger(unsigned int, u16);
  37
  38struct device;
  39
  40extern int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
  41                                  int trigger, int polarity);
  42extern void (*__acpi_unregister_gsi)(u32 gsi);
  43
  44static inline void disable_acpi(void)
  45{
  46        acpi_disabled = 1;
  47        acpi_pci_disabled = 1;
  48        acpi_noirq = 1;
  49}
  50
  51extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
  52
  53static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
  54static inline void acpi_disable_pci(void)
  55{
  56        acpi_pci_disabled = 1;
  57        acpi_noirq_set();
  58}
  59
  60/* Low-level suspend routine. */
  61extern int (*acpi_suspend_lowlevel)(void);
  62
  63/* Physical address to resume after wakeup */
  64unsigned long acpi_get_wakeup_address(void);
  65
  66/*
  67 * Check if the CPU can handle C2 and deeper
  68 */
  69static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate)
  70{
  71        /*
  72         * Early models (<=5) of AMD Opterons are not supposed to go into
  73         * C2 state.
  74         *
  75         * Steppings 0x0A and later are good
  76         */
  77        if (boot_cpu_data.x86 == 0x0F &&
  78            boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
  79            boot_cpu_data.x86_model <= 0x05 &&
  80            boot_cpu_data.x86_stepping < 0x0A)
  81                return 1;
  82        else if (boot_cpu_has(X86_BUG_AMD_APIC_C1E))
  83                return 1;
  84        else
  85                return max_cstate;
  86}
  87
  88static inline bool arch_has_acpi_pdc(void)
  89{
  90        struct cpuinfo_x86 *c = &cpu_data(0);
  91        return (c->x86_vendor == X86_VENDOR_INTEL ||
  92                c->x86_vendor == X86_VENDOR_CENTAUR);
  93}
  94
  95static inline void arch_acpi_set_pdc_bits(u32 *buf)
  96{
  97        struct cpuinfo_x86 *c = &cpu_data(0);
  98
  99        buf[2] |= ACPI_PDC_C_CAPABILITY_SMP;
 100
 101        if (cpu_has(c, X86_FEATURE_EST))
 102                buf[2] |= ACPI_PDC_EST_CAPABILITY_SWSMP;
 103
 104        if (cpu_has(c, X86_FEATURE_ACPI))
 105                buf[2] |= ACPI_PDC_T_FFH;
 106
 107        /*
 108         * If mwait/monitor is unsupported, C2/C3_FFH will be disabled
 109         */
 110        if (!cpu_has(c, X86_FEATURE_MWAIT))
 111                buf[2] &= ~(ACPI_PDC_C_C2C3_FFH);
 112}
 113
 114static inline bool acpi_has_cpu_in_madt(void)
 115{
 116        return !!acpi_lapic;
 117}
 118
 119#define ACPI_HAVE_ARCH_SET_ROOT_POINTER
 120static inline void acpi_arch_set_root_pointer(u64 addr)
 121{
 122        x86_init.acpi.set_root_pointer(addr);
 123}
 124
 125#define ACPI_HAVE_ARCH_GET_ROOT_POINTER
 126static inline u64 acpi_arch_get_root_pointer(void)
 127{
 128        return x86_init.acpi.get_root_pointer();
 129}
 130
 131void acpi_generic_reduced_hw_init(void);
 132
 133void x86_default_set_root_pointer(u64 addr);
 134u64 x86_default_get_root_pointer(void);
 135
 136#else /* !CONFIG_ACPI */
 137
 138#define acpi_lapic 0
 139#define acpi_ioapic 0
 140#define acpi_disable_cmcff 0
 141static inline void acpi_noirq_set(void) { }
 142static inline void acpi_disable_pci(void) { }
 143static inline void disable_acpi(void) { }
 144
 145static inline void acpi_generic_reduced_hw_init(void) { }
 146
 147static inline void x86_default_set_root_pointer(u64 addr) { }
 148
 149static inline u64 x86_default_get_root_pointer(void)
 150{
 151        return 0;
 152}
 153
 154#endif /* !CONFIG_ACPI */
 155
 156#define ARCH_HAS_POWER_INIT     1
 157
 158#ifdef CONFIG_ACPI_NUMA
 159extern int x86_acpi_numa_init(void);
 160#endif /* CONFIG_ACPI_NUMA */
 161
 162#define acpi_unlazy_tlb(x)      leave_mm(x)
 163
 164#ifdef CONFIG_ACPI_APEI
 165static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
 166{
 167        /*
 168         * We currently have no way to look up the EFI memory map
 169         * attributes for a region in a consistent way, because the
 170         * memmap is discarded after efi_free_boot_services(). So if
 171         * you call efi_mem_attributes() during boot and at runtime,
 172         * you could theoretically see different attributes.
 173         *
 174         * We are yet to see any x86 platforms that require anything
 175         * other than PAGE_KERNEL (some ARM64 platforms require the
 176         * equivalent of PAGE_KERNEL_NOCACHE). Additionally, if SME
 177         * is active, the ACPI information will not be encrypted,
 178         * so return PAGE_KERNEL_NOENC until we know differently.
 179         */
 180        return PAGE_KERNEL_NOENC;
 181}
 182#endif
 183
 184#define ACPI_TABLE_UPGRADE_MAX_PHYS (max_low_pfn_mapped << PAGE_SHIFT)
 185
 186#endif /* _ASM_X86_ACPI_H */
 187