xref: /openbmc/linux/arch/x86/include/asm/acpi.h (revision 7b6d864b)
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/processor.h>
30 #include <asm/mmu.h>
31 #include <asm/mpspec.h>
32 #include <asm/realmode.h>
33 
34 #define COMPILER_DEPENDENT_INT64   long long
35 #define COMPILER_DEPENDENT_UINT64  unsigned long long
36 
37 /*
38  * Calling conventions:
39  *
40  * ACPI_SYSTEM_XFACE        - Interfaces to host OS (handlers, threads)
41  * ACPI_EXTERNAL_XFACE      - External ACPI interfaces
42  * ACPI_INTERNAL_XFACE      - Internal ACPI interfaces
43  * ACPI_INTERNAL_VAR_XFACE  - Internal variable-parameter list interfaces
44  */
45 #define ACPI_SYSTEM_XFACE
46 #define ACPI_EXTERNAL_XFACE
47 #define ACPI_INTERNAL_XFACE
48 #define ACPI_INTERNAL_VAR_XFACE
49 
50 /* Asm macros */
51 
52 #define ACPI_FLUSH_CPU_CACHE()	wbinvd()
53 
54 int __acpi_acquire_global_lock(unsigned int *lock);
55 int __acpi_release_global_lock(unsigned int *lock);
56 
57 #define ACPI_ACQUIRE_GLOBAL_LOCK(facs, Acq) \
58 	((Acq) = __acpi_acquire_global_lock(&facs->global_lock))
59 
60 #define ACPI_RELEASE_GLOBAL_LOCK(facs, Acq) \
61 	((Acq) = __acpi_release_global_lock(&facs->global_lock))
62 
63 /*
64  * Math helper asm macros
65  */
66 #define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
67 	asm("divl %2;"				     \
68 	    : "=a"(q32), "=d"(r32)		     \
69 	    : "r"(d32),				     \
70 	     "0"(n_lo), "1"(n_hi))
71 
72 
73 #define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
74 	asm("shrl   $1,%2	;"	\
75 	    "rcrl   $1,%3;"		\
76 	    : "=r"(n_hi), "=r"(n_lo)	\
77 	    : "0"(n_hi), "1"(n_lo))
78 
79 #ifdef CONFIG_ACPI
80 extern int acpi_lapic;
81 extern int acpi_ioapic;
82 extern int acpi_noirq;
83 extern int acpi_strict;
84 extern int acpi_disabled;
85 extern int acpi_pci_disabled;
86 extern int acpi_skip_timer_override;
87 extern int acpi_use_timer_override;
88 extern int acpi_fix_pin2_polarity;
89 
90 extern u8 acpi_sci_flags;
91 extern int acpi_sci_override_gsi;
92 void acpi_pic_sci_set_trigger(unsigned int, u16);
93 
94 extern int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
95 				  int trigger, int polarity);
96 
97 static inline void disable_acpi(void)
98 {
99 	acpi_disabled = 1;
100 	acpi_pci_disabled = 1;
101 	acpi_noirq = 1;
102 }
103 
104 extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
105 
106 static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
107 static inline void acpi_disable_pci(void)
108 {
109 	acpi_pci_disabled = 1;
110 	acpi_noirq_set();
111 }
112 
113 /* Low-level suspend routine. */
114 extern int (*acpi_suspend_lowlevel)(void);
115 
116 /* Physical address to resume after wakeup */
117 #define acpi_wakeup_address ((unsigned long)(real_mode_header->wakeup_start))
118 
119 /*
120  * Check if the CPU can handle C2 and deeper
121  */
122 static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate)
123 {
124 	/*
125 	 * Early models (<=5) of AMD Opterons are not supposed to go into
126 	 * C2 state.
127 	 *
128 	 * Steppings 0x0A and later are good
129 	 */
130 	if (boot_cpu_data.x86 == 0x0F &&
131 	    boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
132 	    boot_cpu_data.x86_model <= 0x05 &&
133 	    boot_cpu_data.x86_mask < 0x0A)
134 		return 1;
135 	else if (amd_e400_c1e_detected)
136 		return 1;
137 	else
138 		return max_cstate;
139 }
140 
141 static inline bool arch_has_acpi_pdc(void)
142 {
143 	struct cpuinfo_x86 *c = &cpu_data(0);
144 	return (c->x86_vendor == X86_VENDOR_INTEL ||
145 		c->x86_vendor == X86_VENDOR_CENTAUR);
146 }
147 
148 static inline void arch_acpi_set_pdc_bits(u32 *buf)
149 {
150 	struct cpuinfo_x86 *c = &cpu_data(0);
151 
152 	buf[2] |= ACPI_PDC_C_CAPABILITY_SMP;
153 
154 	if (cpu_has(c, X86_FEATURE_EST))
155 		buf[2] |= ACPI_PDC_EST_CAPABILITY_SWSMP;
156 
157 	if (cpu_has(c, X86_FEATURE_ACPI))
158 		buf[2] |= ACPI_PDC_T_FFH;
159 
160 	/*
161 	 * If mwait/monitor is unsupported, C2/C3_FFH will be disabled
162 	 */
163 	if (!cpu_has(c, X86_FEATURE_MWAIT))
164 		buf[2] &= ~(ACPI_PDC_C_C2C3_FFH);
165 }
166 
167 #else /* !CONFIG_ACPI */
168 
169 #define acpi_lapic 0
170 #define acpi_ioapic 0
171 static inline void acpi_noirq_set(void) { }
172 static inline void acpi_disable_pci(void) { }
173 static inline void disable_acpi(void) { }
174 
175 #endif /* !CONFIG_ACPI */
176 
177 #define ARCH_HAS_POWER_INIT	1
178 
179 #ifdef CONFIG_ACPI_NUMA
180 extern int acpi_numa;
181 extern int x86_acpi_numa_init(void);
182 #endif /* CONFIG_ACPI_NUMA */
183 
184 #define acpi_unlazy_tlb(x)	leave_mm(x)
185 
186 #endif /* _ASM_X86_ACPI_H */
187