arch/x86/include/asm/acpi.h

   1 #ifndef _ASM_X86_ACPI_H
   2 #define _ASM_X86_ACPI_H
   3
   4 /*
   5  *  Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
   6  *  Copyright (C) 2001 Patrick Mochel <mochel@osdl.org>
   7  *
   8  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  *
  24  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  25  */
  26 #include <acpi/pdc_intel.h>
  27
  28 #include <asm/numa.h>
  29 #include <asm/fixmap.h>
  30 #include <asm/processor.h>
  31 #include <asm/mmu.h>
  32 #include <asm/mpspec.h>
  33 #include <asm/realmode.h>
  34 #include <asm/x86_init.h>
  35
  36 #ifdef CONFIG_ACPI_APEI
  37 # include <asm/pgtable_types.h>
  38 #endif
  39
  40 #ifdef CONFIG_ACPI
  41 extern int acpi_lapic;
  42 extern int acpi_ioapic;
  43 extern int acpi_noirq;
  44 extern int acpi_strict;
  45 extern int acpi_disabled;
  46 extern int acpi_pci_disabled;
  47 extern int acpi_skip_timer_override;
  48 extern int acpi_use_timer_override;
  49 extern int acpi_fix_pin2_polarity;
  50 extern int acpi_disable_cmcff;
  51
  52 extern u8 acpi_sci_flags;
  53 extern u32 acpi_sci_override_gsi;
  54 void acpi_pic_sci_set_trigger(unsigned int, u16);
  55
  56 struct device;
  57
  58 extern int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
  59                                   int trigger, int polarity);
  60 extern void (*__acpi_unregister_gsi)(u32 gsi);
  61
  62 static inline void disable_acpi(void)
  63 {
  64         acpi_disabled = 1;
  65         acpi_pci_disabled = 1;
  66         acpi_noirq = 1;
  67 }
  68
  69 extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
  70
  71 static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
  72 static inline void acpi_disable_pci(void)
  73 {
  74         acpi_pci_disabled = 1;
  75         acpi_noirq_set();
  76 }
  77
  78 /* Low-level suspend routine. */
  79 extern int (*acpi_suspend_lowlevel)(void);
  80
  81 /* Physical address to resume after wakeup */
  82 #define acpi_wakeup_address ((unsigned long)(real_mode_header->wakeup_start))
  83
  84 /*
  85  * Check if the CPU can handle C2 and deeper
  86  */
  87 static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate)
  88 {
  89         /*
  90          * Early models (<=5) of AMD Opterons are not supposed to go into
  91          * C2 state.
  92          *
  93          * Steppings 0x0A and later are good
  94          */
  95         if (boot_cpu_data.x86 == 0x0F &&
  96             boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
  97             boot_cpu_data.x86_model <= 0x05 &&
  98             boot_cpu_data.x86_stepping < 0x0A)
  99                 return 1;
 100         else if (boot_cpu_has(X86_BUG_AMD_APIC_C1E))
 101                 return 1;
 102         else
 103                 return max_cstate;
 104 }
 105
 106 static inline bool arch_has_acpi_pdc(void)
 107 {
 108         struct cpuinfo_x86 *c = &cpu_data(0);
 109         return (c->x86_vendor == X86_VENDOR_INTEL ||
 110                 c->x86_vendor == X86_VENDOR_CENTAUR);
 111 }
 112
 113 static inline void arch_acpi_set_pdc_bits(u32 *buf)
 114 {
 115         struct cpuinfo_x86 *c = &cpu_data(0);
 116
 117         buf[2] |= ACPI_PDC_C_CAPABILITY_SMP;
 118
 119         if (cpu_has(c, X86_FEATURE_EST))
 120                 buf[2] |= ACPI_PDC_EST_CAPABILITY_SWSMP;
 121
 122         if (cpu_has(c, X86_FEATURE_ACPI))
 123                 buf[2] |= ACPI_PDC_T_FFH;
 124
 125         /*
 126          * If mwait/monitor is unsupported, C2/C3_FFH will be disabled
 127          */
 128         if (!cpu_has(c, X86_FEATURE_MWAIT))
 129                 buf[2] &= ~(ACPI_PDC_C_C2C3_FFH);
 130 }
 131
 132 static inline bool acpi_has_cpu_in_madt(void)
 133 {
 134         return !!acpi_lapic;
 135 }
 136
 137 #define ACPI_HAVE_ARCH_GET_ROOT_POINTER
 138 static inline u64 acpi_arch_get_root_pointer(void)
 139 {
 140         return x86_init.acpi.get_root_pointer();
 141 }
 142
 143 void acpi_generic_reduced_hw_init(void);
 144
 145 #else /* !CONFIG_ACPI */
 146
 147 #define acpi_lapic 0
 148 #define acpi_ioapic 0
 149 #define acpi_disable_cmcff 0
 150 static inline void acpi_noirq_set(void) { }
 151 static inline void acpi_disable_pci(void) { }
 152 static inline void disable_acpi(void) { }
 153
 154 static inline void acpi_generic_reduced_hw_init(void) { }
 155
 156 #endif /* !CONFIG_ACPI */
 157
 158 #define ARCH_HAS_POWER_INIT     1
 159
 160 #ifdef CONFIG_ACPI_NUMA
 161 extern int x86_acpi_numa_init(void);
 162 #endif /* CONFIG_ACPI_NUMA */
 163
 164 #define acpi_unlazy_tlb(x)      leave_mm(x)
 165
 166 #ifdef CONFIG_ACPI_APEI
 167 static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
 168 {
 169         /*
 170          * We currently have no way to look up the EFI memory map
 171          * attributes for a region in a consistent way, because the
 172          * memmap is discarded after efi_free_boot_services(). So if
 173          * you call efi_mem_attributes() during boot and at runtime,
 174          * you could theoretically see different attributes.
 175          *
 176          * We are yet to see any x86 platforms that require anything
 177          * other than PAGE_KERNEL (some ARM64 platforms require the
 178          * equivalent of PAGE_KERNEL_NOCACHE). Additionally, if SME
 179          * is active, the ACPI information will not be encrypted,
 180          * so return PAGE_KERNEL_NOENC until we know differently.
 181          */
 182         return PAGE_KERNEL_NOENC;
 183 }
 184 #endif
 185
 186 #define ACPI_TABLE_UPGRADE_MAX_PHYS (max_low_pfn_mapped << PAGE_SHIFT)
 187
 188 #endif /* _ASM_X86_ACPI_H */