1 /*
2 * asm-i386/acpi.h
3 *
4 * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Patrick Mochel <mochel@osdl.org>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26 #ifndef _ASM_ACPI_H
27 #define _ASM_ACPI_H
28
29 #ifdef __KERNEL__
30
31 #include <asm/system.h> /* defines cmpxchg */
32
33 #define COMPILER_DEPENDENT_INT64 long long
34 #define COMPILER_DEPENDENT_UINT64 unsigned long long
35
36 /*
37 * Calling conventions:
38 *
39 * ACPI_SYSTEM_XFACE - Interfaces to host OS (handlers, threads)
40 * ACPI_EXTERNAL_XFACE - External ACPI interfaces
41 * ACPI_INTERNAL_XFACE - Internal ACPI interfaces
42 * ACPI_INTERNAL_VAR_XFACE - Internal variable-parameter list interfaces
43 */
44 #define ACPI_SYSTEM_XFACE
45 #define ACPI_EXTERNAL_XFACE
46 #define ACPI_INTERNAL_XFACE
47 #define ACPI_INTERNAL_VAR_XFACE
48
49 /* Asm macros */
50
51 #define ACPI_ASM_MACROS
52 #define BREAKPOINT3
53 #define ACPI_DISABLE_IRQS() local_irq_disable()
54 #define ACPI_ENABLE_IRQS() local_irq_enable()
55 #define ACPI_FLUSH_CPU_CACHE() wbinvd()
56
57
58 static inline int
59 __acpi_acquire_global_lock (unsigned int *lock)
60 {
61 unsigned int old, new, val;
62 do {
63 old = *lock;
64 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
65 val = cmpxchg(lock, old, new);
66 } while (unlikely (val != old));
67 return (new < 3) ? -1 : 0;
68 }
69
70 static inline int
71 __acpi_release_global_lock (unsigned int *lock)
72 {
73 unsigned int old, new, val;
74 do {
75 old = *lock;
76 new = old & ~0x3;
77 val = cmpxchg(lock, old, new);
78 } while (unlikely (val != old));
79 return old & 0x1;
80 }
81
82 #define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \
83 ((Acq) = __acpi_acquire_global_lock((unsigned int *) GLptr))
84
85 #define ACPI_RELEASE_GLOBAL_LOCK(GLptr, Acq) \
86 ((Acq) = __acpi_release_global_lock((unsigned int *) GLptr))
87
88 /*
89 * Math helper asm macros
90 */
91 #define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
92 asm("divl %2;" \
93 :"=a"(q32), "=d"(r32) \
94 :"r"(d32), \
95 ""(n_lo), "1"(n_hi))
96
97
98 #define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
99 asm("shrl $1,%2;" \
100 "rcrl $1,%3;" \
101 :"=r"(n_hi), "=r"(n_lo) \
102 :""(n_hi), "1"(n_lo))
103
104 /*
105 * Refer Intel ACPI _PDC support document for bit definitions
106 */
107 #define ACPI_PDC_EST_CAPABILITY_SMP 0xa
108 #define ACPI_PDC_EST_CAPABILITY_MSR 0x1
109
110 #ifdef CONFIG_ACPI_BOOT
111 extern int acpi_lapic;
112 extern int acpi_ioapic;
113 extern int acpi_noirq;
114 extern int acpi_strict;
115 extern int acpi_disabled;
116 extern int acpi_ht;
117 extern int acpi_pci_disabled;
118 static inline void disable_acpi(void)
119 {
120 acpi_disabled = 1;
121 acpi_ht = 0;
122 acpi_pci_disabled = 1;
123 acpi_noirq = 1;
124 }
125
126 /* Fixmap pages to reserve for ACPI boot-time tables (see fixmap.h) */
127 #define FIX_ACPI_PAGES 4
128
129 extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
130
131 #ifdef CONFIG_X86_IO_APIC
132 extern int skip_ioapic_setup;
133 extern int acpi_skip_timer_override;
134
135 extern void check_acpi_pci(void);
136
137 static inline void disable_ioapic_setup(void)
138 {
139 skip_ioapic_setup = 1;
140 }
141
142 static inline int ioapic_setup_disabled(void)
143 {
144 return skip_ioapic_setup;
145 }
146
147 #else
148 static inline void disable_ioapic_setup(void) { }
149 static inline void check_acpi_pci(void) { }
150
151 #endif
152
153 #else /* CONFIG_ACPI_BOOT */
154 # define acpi_lapic 0
155 # define acpi_ioapic 0
156
157 #endif
158
159 #ifdef CONFIG_ACPI_PCI
160 static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
161 static inline void acpi_disable_pci(void)
162 {
163 acpi_pci_disabled = 1;
164 acpi_noirq_set();
165 }
166 extern int acpi_irq_balance_set(char *str);
167 #else
168 static inline void acpi_noirq_set(void) { }
169 static inline void acpi_disable_pci(void) { }
170 static inline int acpi_irq_balance_set(char *str) { return 0; }
171 #endif
172
173 #ifdef CONFIG_ACPI_SLEEP
174
175 /* routines for saving/restoring kernel state */
176 extern int acpi_save_state_mem(void);
177 extern int acpi_save_state_disk(void);
178 extern void acpi_restore_state_mem(void);
179
180 extern unsigned long acpi_wakeup_address;
181
182 /* early initialization routine */
183 extern void acpi_reserve_bootmem(void);
184
185 #endif /*CONFIG_ACPI_SLEEP*/
186
187 extern u8 x86_acpiid_to_apicid[];
188
189 #endif /*__KERNEL__*/
190
191 #endif /*_ASM_ACPI_H*/
192
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