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/x86_init.h> 17 #include <asm/cpufeature.h> 18 #include <asm/irq_vectors.h> 19 20 #ifdef CONFIG_ACPI_APEI 21 # include <asm/pgtable_types.h> 22 #endif 23 24 #ifdef CONFIG_ACPI 25 extern int acpi_lapic; 26 extern int acpi_ioapic; 27 extern int acpi_noirq; 28 extern int acpi_strict; 29 extern int acpi_disabled; 30 extern int acpi_pci_disabled; 31 extern int acpi_skip_timer_override; 32 extern int acpi_use_timer_override; 33 extern int acpi_fix_pin2_polarity; 34 extern int acpi_disable_cmcff; 35 extern bool acpi_int_src_ovr[NR_IRQS_LEGACY]; 36 37 extern u8 acpi_sci_flags; 38 extern u32 acpi_sci_override_gsi; 39 void acpi_pic_sci_set_trigger(unsigned int, u16); 40 41 struct device; 42 43 extern int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 44 int trigger, int polarity); 45 extern void (*__acpi_unregister_gsi)(u32 gsi); 46 47 static inline void disable_acpi(void) 48 { 49 acpi_disabled = 1; 50 acpi_pci_disabled = 1; 51 acpi_noirq = 1; 52 } 53 54 extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq); 55 56 static inline void acpi_noirq_set(void) { acpi_noirq = 1; } 57 static inline void acpi_disable_pci(void) 58 { 59 acpi_pci_disabled = 1; 60 acpi_noirq_set(); 61 } 62 63 /* Low-level suspend routine. */ 64 extern int (*acpi_suspend_lowlevel)(void); 65 66 /* Physical address to resume after wakeup */ 67 unsigned long acpi_get_wakeup_address(void); 68 69 static inline bool acpi_skip_set_wakeup_address(void) 70 { 71 return cpu_feature_enabled(X86_FEATURE_XENPV); 72 } 73 74 #define acpi_skip_set_wakeup_address acpi_skip_set_wakeup_address 75 76 /* 77 * Check if the CPU can handle C2 and deeper 78 */ 79 static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate) 80 { 81 /* 82 * Early models (<=5) of AMD Opterons are not supposed to go into 83 * C2 state. 84 * 85 * Steppings 0x0A and later are good 86 */ 87 if (boot_cpu_data.x86 == 0x0F && 88 boot_cpu_data.x86_vendor == X86_VENDOR_AMD && 89 boot_cpu_data.x86_model <= 0x05 && 90 boot_cpu_data.x86_stepping < 0x0A) 91 return 1; 92 else if (boot_cpu_has(X86_BUG_AMD_APIC_C1E)) 93 return 1; 94 else 95 return max_cstate; 96 } 97 98 static inline bool arch_has_acpi_pdc(void) 99 { 100 struct cpuinfo_x86 *c = &cpu_data(0); 101 return (c->x86_vendor == X86_VENDOR_INTEL || 102 c->x86_vendor == X86_VENDOR_CENTAUR); 103 } 104 105 static inline void arch_acpi_set_pdc_bits(u32 *buf) 106 { 107 struct cpuinfo_x86 *c = &cpu_data(0); 108 109 buf[2] |= ACPI_PDC_C_CAPABILITY_SMP; 110 111 if (cpu_has(c, X86_FEATURE_EST)) 112 buf[2] |= ACPI_PDC_EST_CAPABILITY_SWSMP; 113 114 if (cpu_has(c, X86_FEATURE_ACPI)) 115 buf[2] |= ACPI_PDC_T_FFH; 116 117 /* 118 * If mwait/monitor is unsupported, C2/C3_FFH will be disabled 119 */ 120 if (!cpu_has(c, X86_FEATURE_MWAIT)) 121 buf[2] &= ~(ACPI_PDC_C_C2C3_FFH); 122 } 123 124 static inline bool acpi_has_cpu_in_madt(void) 125 { 126 return !!acpi_lapic; 127 } 128 129 #define ACPI_HAVE_ARCH_SET_ROOT_POINTER 130 static inline void acpi_arch_set_root_pointer(u64 addr) 131 { 132 x86_init.acpi.set_root_pointer(addr); 133 } 134 135 #define ACPI_HAVE_ARCH_GET_ROOT_POINTER 136 static inline u64 acpi_arch_get_root_pointer(void) 137 { 138 return x86_init.acpi.get_root_pointer(); 139 } 140 141 void acpi_generic_reduced_hw_init(void); 142 143 void x86_default_set_root_pointer(u64 addr); 144 u64 x86_default_get_root_pointer(void); 145 146 #else /* !CONFIG_ACPI */ 147 148 #define acpi_lapic 0 149 #define acpi_ioapic 0 150 #define acpi_disable_cmcff 0 151 static inline void acpi_noirq_set(void) { } 152 static inline void acpi_disable_pci(void) { } 153 static inline void disable_acpi(void) { } 154 155 static inline void acpi_generic_reduced_hw_init(void) { } 156 157 static inline void x86_default_set_root_pointer(u64 addr) { } 158 159 static inline u64 x86_default_get_root_pointer(void) 160 { 161 return 0; 162 } 163 164 #endif /* !CONFIG_ACPI */ 165 166 #define ARCH_HAS_POWER_INIT 1 167 168 #ifdef CONFIG_ACPI_NUMA 169 extern int x86_acpi_numa_init(void); 170 #endif /* CONFIG_ACPI_NUMA */ 171 172 struct cper_ia_proc_ctx; 173 174 #ifdef CONFIG_ACPI_APEI 175 static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr) 176 { 177 /* 178 * We currently have no way to look up the EFI memory map 179 * attributes for a region in a consistent way, because the 180 * memmap is discarded after efi_free_boot_services(). So if 181 * you call efi_mem_attributes() during boot and at runtime, 182 * you could theoretically see different attributes. 183 * 184 * We are yet to see any x86 platforms that require anything 185 * other than PAGE_KERNEL (some ARM64 platforms require the 186 * equivalent of PAGE_KERNEL_NOCACHE). Additionally, if SME 187 * is active, the ACPI information will not be encrypted, 188 * so return PAGE_KERNEL_NOENC until we know differently. 189 */ 190 return PAGE_KERNEL_NOENC; 191 } 192 193 int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info, 194 u64 lapic_id); 195 #else 196 static inline int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info, 197 u64 lapic_id) 198 { 199 return -EINVAL; 200 } 201 #endif 202 203 #define ACPI_TABLE_UPGRADE_MAX_PHYS (max_low_pfn_mapped << PAGE_SHIFT) 204 205 #endif /* _ASM_X86_ACPI_H */ 206