LXR linux/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
  35#ifdef CONFIG_ACPI_APEI
  36# include <asm/pgtable_types.h>
  37#endif
  38
  39#ifdef CONFIG_ACPI
  40extern int acpi_lapic;
  41extern int acpi_ioapic;
  42extern int acpi_noirq;
  43extern int acpi_strict;
  44extern int acpi_disabled;
  45extern int acpi_pci_disabled;
  46extern int acpi_skip_timer_override;
  47extern int acpi_use_timer_override;
  48extern int acpi_fix_pin2_polarity;
  49extern int acpi_disable_cmcff;
  50
  51extern u8 acpi_sci_flags;
  52extern int acpi_sci_override_gsi;
  53void acpi_pic_sci_set_trigger(unsigned int, u16);
  54
  55extern int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
  56                                  int trigger, int polarity);
  57extern void (*__acpi_unregister_gsi)(u32 gsi);
  58
  59static inline void disable_acpi(void)
  60{
  61        acpi_disabled = 1;
  62        acpi_pci_disabled = 1;
  63        acpi_noirq = 1;
  64}
  65
  66extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
  67
  68static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
  69static inline void acpi_disable_pci(void)
  70{
  71        acpi_pci_disabled = 1;
  72        acpi_noirq_set();
  73}
  74
  75/* Low-level suspend routine. */
  76extern int (*acpi_suspend_lowlevel)(void);
  77
  78/* Physical address to resume after wakeup */
  79#define acpi_wakeup_address ((unsigned long)(real_mode_header->wakeup_start))
  80
  81/*
  82 * Check if the CPU can handle C2 and deeper
  83 */
  84static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate)
  85{
  86        /*
  87         * Early models (<=5) of AMD Opterons are not supposed to go into
  88         * C2 state.
  89         *
  90         * Steppings 0x0A and later are good
  91         */
  92        if (boot_cpu_data.x86 == 0x0F &&
  93            boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
  94            boot_cpu_data.x86_model <= 0x05 &&
  95            boot_cpu_data.x86_mask < 0x0A)
  96                return 1;
  97        else if (amd_e400_c1e_detected)
  98                return 1;
  99        else
 100                return max_cstate;
 101}
 102
 103static inline bool arch_has_acpi_pdc(void)
 104{
 105        struct cpuinfo_x86 *c = &cpu_data(0);
 106        return (c->x86_vendor == X86_VENDOR_INTEL ||
 107                c->x86_vendor == X86_VENDOR_CENTAUR);
 108}
 109
 110static inline void arch_acpi_set_pdc_bits(u32 *buf)
 111{
 112        struct cpuinfo_x86 *c = &cpu_data(0);
 113
 114        buf[2] |= ACPI_PDC_C_CAPABILITY_SMP;
 115
 116        if (cpu_has(c, X86_FEATURE_EST))
 117                buf[2] |= ACPI_PDC_EST_CAPABILITY_SWSMP;
 118
 119        if (cpu_has(c, X86_FEATURE_ACPI))
 120                buf[2] |= ACPI_PDC_T_FFH;
 121
 122        /*
 123         * If mwait/monitor is unsupported, C2/C3_FFH will be disabled
 124         */
 125        if (!cpu_has(c, X86_FEATURE_MWAIT))
 126                buf[2] &= ~(ACPI_PDC_C_C2C3_FFH);
 127}
 128
 129static inline bool acpi_has_cpu_in_madt(void)
 130{
 131        return !!acpi_lapic;
 132}
 133
 134#else /* !CONFIG_ACPI */
 135
 136#define acpi_lapic 0
 137#define acpi_ioapic 0
 138#define acpi_disable_cmcff 0
 139static inline void acpi_noirq_set(void) { }
 140static inline void acpi_disable_pci(void) { }
 141static inline void disable_acpi(void) { }
 142
 143#endif /* !CONFIG_ACPI */
 144
 145#define ARCH_HAS_POWER_INIT     1
 146
 147#ifdef CONFIG_ACPI_NUMA
 148extern int acpi_numa;
 149extern int x86_acpi_numa_init(void);
 150#endif /* CONFIG_ACPI_NUMA */
 151
 152#define acpi_unlazy_tlb(x)      leave_mm(x)
 153
 154#ifdef CONFIG_ACPI_APEI
 155static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
 156{
 157        /*
 158         * We currently have no way to look up the EFI memory map
 159         * attributes for a region in a consistent way, because the
 160         * memmap is discarded after efi_free_boot_services(). So if
 161         * you call efi_mem_attributes() during boot and at runtime,
 162         * you could theoretically see different attributes.
 163         *
 164         * Since we are yet to see any x86 platforms that require
 165         * anything other than PAGE_KERNEL (some arm64 platforms
 166         * require the equivalent of PAGE_KERNEL_NOCACHE), return that
 167         * until we know differently.
 168         */
 169         return PAGE_KERNEL;
 170}
 171#endif
 172
 173#endif /* _ASM_X86_ACPI_H */
 174