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_GET_ROOT_POINTER 121 static inline u64 acpi_arch_get_root_pointer(void) 122 { 123 return x86_init.acpi.get_root_pointer(); 124 } 125 126 void acpi_generic_reduced_hw_init(void); 127 128 u64 x86_default_get_root_pointer(void); 129 130 #else /* !CONFIG_ACPI */ 131 132 #define acpi_lapic 0 133 #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) { } 138 139 static inline void acpi_generic_reduced_hw_init(void) { } 140 141 static inline u64 x86_default_get_root_pointer(void) 142 { 143 return 0; 144 } 145 146 #endif /* !CONFIG_ACPI */ 147 148 #define ARCH_HAS_POWER_INIT 1 149 150 #ifdef CONFIG_ACPI_NUMA 151 extern int x86_acpi_numa_init(void); 152 #endif /* CONFIG_ACPI_NUMA */ 153 154 #define acpi_unlazy_tlb(x) leave_mm(x) 155 156 #ifdef CONFIG_ACPI_APEI 157 static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr) 158 { 159 /* 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. 165 * 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. 171 */ 172 return PAGE_KERNEL_NOENC; 173 } 174 #endif 175 176 #define ACPI_TABLE_UPGRADE_MAX_PHYS (max_low_pfn_mapped << PAGE_SHIFT) 177 178 #endif /* _ASM_X86_ACPI_H */ 179