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