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
41extern int acpi_lapic;
42extern int acpi_ioapic;
43extern int acpi_noirq;
44extern int acpi_strict;
45extern int acpi_disabled;
46extern int acpi_pci_disabled;
47extern int acpi_skip_timer_override;
48extern int acpi_use_timer_override;
49extern int acpi_fix_pin2_polarity;
50extern int acpi_disable_cmcff;
51
52extern u8 acpi_sci_flags;
53extern u32 acpi_sci_override_gsi;
54void acpi_pic_sci_set_trigger(unsigned int, u16);
55
56struct device;
57
58extern int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
59 int trigger, int polarity);
60extern void (*__acpi_unregister_gsi)(u32 gsi);
61
62static inline void disable_acpi(void)
63{
64 acpi_disabled = 1;
65 acpi_pci_disabled = 1;
66 acpi_noirq = 1;
67}
68
69extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
70
71static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
72static inline void acpi_disable_pci(void)
73{
74 acpi_pci_disabled = 1;
75 acpi_noirq_set();
76}
77
78/* Low-level suspend routine. */
79extern 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 */
87static 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
106static 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
113static 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
132static inline bool acpi_has_cpu_in_madt(void)
133{
134 return !!acpi_lapic;
135}
136
137#define ACPI_HAVE_ARCH_GET_ROOT_POINTER
138static inline u64 acpi_arch_get_root_pointer(void)
139{
140 return x86_init.acpi.get_root_pointer();
141}
142
143void acpi_generic_reduced_hw_init(void);
144
145u64 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
152static inline void acpi_noirq_set(void) { }
153static inline void acpi_disable_pci(void) { }
154static inline void disable_acpi(void) { }
155
156static inline void acpi_generic_reduced_hw_init(void) { }
157
158static 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
168extern 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
174static 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