1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _ASM_X86_ACPI_H
3 #define _ASM_X86_ACPI_H
6 * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
7 * Copyright (C) 2001 Patrick Mochel <mochel@osdl.org>
9 #include <acpi/pdc_intel.h>
12 #include <asm/fixmap.h>
13 #include <asm/processor.h>
15 #include <asm/mpspec.h>
16 #include <asm/realmode.h>
17 #include <asm/x86_init.h>
19 #ifdef CONFIG_ACPI_APEI
20 # include <asm/pgtable_types.h>
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;
35 extern u8 acpi_sci_flags;
36 extern u32 acpi_sci_override_gsi;
37 void acpi_pic_sci_set_trigger(unsigned int, u16);
41 extern int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
42 int trigger, int polarity);
43 extern void (*__acpi_unregister_gsi)(u32 gsi);
45 static inline void disable_acpi(void)
48 acpi_pci_disabled = 1;
52 extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
54 static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
55 static inline void acpi_disable_pci(void)
57 acpi_pci_disabled = 1;
61 /* Low-level suspend routine. */
62 extern int (*acpi_suspend_lowlevel)(void);
64 /* Physical address to resume after wakeup */
65 #define acpi_wakeup_address ((unsigned long)(real_mode_header->wakeup_start))
68 * Check if the CPU can handle C2 and deeper
70 static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate)
73 * Early models (<=5) of AMD Opterons are not supposed to go into
76 * Steppings 0x0A and later are good
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)
83 else if (boot_cpu_has(X86_BUG_AMD_APIC_C1E))
89 static inline bool arch_has_acpi_pdc(void)
91 struct cpuinfo_x86 *c = &cpu_data(0);
92 return (c->x86_vendor == X86_VENDOR_INTEL ||
93 c->x86_vendor == X86_VENDOR_CENTAUR);
96 static inline void arch_acpi_set_pdc_bits(u32 *buf)
98 struct cpuinfo_x86 *c = &cpu_data(0);
100 buf[2] |= ACPI_PDC_C_CAPABILITY_SMP;
102 if (cpu_has(c, X86_FEATURE_EST))
103 buf[2] |= ACPI_PDC_EST_CAPABILITY_SWSMP;
105 if (cpu_has(c, X86_FEATURE_ACPI))
106 buf[2] |= ACPI_PDC_T_FFH;
109 * If mwait/monitor is unsupported, C2/C3_FFH will be disabled
111 if (!cpu_has(c, X86_FEATURE_MWAIT))
112 buf[2] &= ~(ACPI_PDC_C_C2C3_FFH);
115 static inline bool acpi_has_cpu_in_madt(void)
120 #define ACPI_HAVE_ARCH_GET_ROOT_POINTER
121 static inline u64 acpi_arch_get_root_pointer(void)
123 return x86_init.acpi.get_root_pointer();
126 void acpi_generic_reduced_hw_init(void);
128 u64 x86_default_get_root_pointer(void);
130 #else /* !CONFIG_ACPI */
133 #define acpi_ioapic 0
134 #define acpi_disable_cmcff 0
135 static inline void acpi_noirq_set(void) { }
136 static inline void acpi_disable_pci(void) { }
137 static inline void disable_acpi(void) { }
139 static inline void acpi_generic_reduced_hw_init(void) { }
141 static inline u64 x86_default_get_root_pointer(void)
146 #endif /* !CONFIG_ACPI */
148 #define ARCH_HAS_POWER_INIT 1
150 #ifdef CONFIG_ACPI_NUMA
151 extern int x86_acpi_numa_init(void);
152 #endif /* CONFIG_ACPI_NUMA */
154 #define acpi_unlazy_tlb(x) leave_mm(x)
156 #ifdef CONFIG_ACPI_APEI
157 static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
160 * We currently have no way to look up the EFI memory map
161 * attributes for a region in a consistent way, because the
162 * memmap is discarded after efi_free_boot_services(). So if
163 * you call efi_mem_attributes() during boot and at runtime,
164 * you could theoretically see different attributes.
166 * We are yet to see any x86 platforms that require anything
167 * other than PAGE_KERNEL (some ARM64 platforms require the
168 * equivalent of PAGE_KERNEL_NOCACHE). Additionally, if SME
169 * is active, the ACPI information will not be encrypted,
170 * so return PAGE_KERNEL_NOENC until we know differently.
172 return PAGE_KERNEL_NOENC;
176 #define ACPI_TABLE_UPGRADE_MAX_PHYS (max_low_pfn_mapped << PAGE_SHIFT)
178 #endif /* _ASM_X86_ACPI_H */