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 u64 x86_default_get_root_pointer(void); 146 147 #else /* !CONFIG_ACPI */ 148 149 #define acpi_lapic 0 150 #define acpi_ioapic 0 151 #define acpi_disable_cmcff 0 152 static inline void acpi_noirq_set(void) { } 153 static inline void acpi_disable_pci(void) { } 154 static inline void disable_acpi(void) { } 155 156 static inline void acpi_generic_reduced_hw_init(void) { } 157 158 static inline u64 x86_default_get_root_pointer(void) 159 { 160 return 0; 161 } 162 163 #endif /* !CONFIG_ACPI */ 164 165 #define ARCH_HAS_POWER_INIT 1 166 167 #ifdef CONFIG_ACPI_NUMA 168 extern int x86_acpi_numa_init(void); 169 #endif /* CONFIG_ACPI_NUMA */ 170 171 #define acpi_unlazy_tlb(x) leave_mm(x) 172 173 #ifdef CONFIG_ACPI_APEI 174 static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr) 175 { 176 /* 177 * We currently have no way to look up the EFI memory map 178 * attributes for a region in a consistent way, because the 179 * memmap is discarded after efi_free_boot_services(). So if 180 * you call efi_mem_attributes() during boot and at runtime, 181 * you could theoretically see different attributes. 182 * 183 * We are yet to see any x86 platforms that require anything 184 * other than PAGE_KERNEL (some ARM64 platforms require the 185 * equivalent of PAGE_KERNEL_NOCACHE). Additionally, if SME 186 * is active, the ACPI information will not be encrypted, 187 * so return PAGE_KERNEL_NOENC until we know differently. 188 */ 189 return PAGE_KERNEL_NOENC; 190 } 191 #endif 192 193 #define ACPI_TABLE_UPGRADE_MAX_PHYS (max_low_pfn_mapped << PAGE_SHIFT) 194 195 #endif /* _ASM_X86_ACPI_H */ 196