1 /*
2 * asm-x86_64/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 #define COMPILER_DEPENDENT_INT64 long long
32 #define COMPILER_DEPENDENT_UINT64 unsigned long long
33
34 /*
35 * Calling conventions:
36 *
37 * ACPI_SYSTEM_XFACE - Interfaces to host OS (handlers, threads)
38 * ACPI_EXTERNAL_XFACE - External ACPI interfaces
39 * ACPI_INTERNAL_XFACE - Internal ACPI interfaces
40 * ACPI_INTERNAL_VAR_XFACE - Internal variable-parameter list interfaces
41 */
42 #define ACPI_SYSTEM_XFACE
43 #define ACPI_EXTERNAL_XFACE
44 #define ACPI_INTERNAL_XFACE
45 #define ACPI_INTERNAL_VAR_XFACE
46
47 /* Asm macros */
48
49 #define ACPI_ASM_MACROS
50 #define BREAKPOINT3
51 #define ACPI_DISABLE_IRQS() __cli()
52 #define ACPI_ENABLE_IRQS() __sti()
53 #define ACPI_FLUSH_CPU_CACHE() wbinvd()
54
55 static inline int
__acpi_acquire_global_lock(unsigned int * lock)56 __acpi_acquire_global_lock (unsigned int *lock)
57 {
58 unsigned int old, new, val;
59 do {
60 old = *lock;
61 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
62 val = cmpxchg(lock, old, new);
63 } while (unlikely (val != old));
64 return (new < 3) ? -1 : 0;
65 }
66
67 static inline int
__acpi_release_global_lock(unsigned int * lock)68 __acpi_release_global_lock (unsigned int *lock)
69 {
70 unsigned int old, new, val;
71 do {
72 old = *lock;
73 new = old & ~0x3;
74 val = cmpxchg(lock, old, new);
75 } while (unlikely (val != old));
76 return old & 0x1;
77 }
78
79 #define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \
80 ((Acq) = __acpi_acquire_global_lock((unsigned int *) GLptr))
81
82 #define ACPI_RELEASE_GLOBAL_LOCK(GLptr, Acq) \
83 ((Acq) = __acpi_release_global_lock((unsigned int *) GLptr))
84
85 /*
86 * Math helper asm macros
87 */
88 #define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
89 asm("divl %2;" \
90 :"=a"(q32), "=d"(r32) \
91 :"r"(d32), \
92 "0"(n_lo), "1"(n_hi))
93
94 #define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
95 asm("shrl $1,%2;" \
96 "rcrl $1,%3;" \
97 :"=r"(n_hi), "=r"(n_lo) \
98 :"0"(n_hi), "1"(n_lo))
99 #ifdef CONFIG_ACPI_PCI
100 extern int acpi_noirq;
101 extern int acpi_pci_disabled;
acpi_noirq_set(void)102 static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
acpi_disable_pci(void)103 static inline void acpi_disable_pci(void)
104 {
105 acpi_pci_disabled = 1;
106 acpi_noirq_set();
107 }
108 extern int acpi_irq_balance_set(char *str);
109 #else
acpi_noirq_set(void)110 static inline void acpi_noirq_set(void) { }
acpi_disable_pci(void)111 static inline void acpi_disable_pci(void) { acpi_noirq_set(); }
acpi_irq_balance_set(char * str)112 static inline int acpi_irq_balance_set(char *str) { return 0; }
113 #endif
114
115 #ifdef CONFIG_ACPI_BOOT
116 extern int acpi_lapic;
117 extern int acpi_ioapic;
118 extern int acpi_strict;
119 extern int acpi_disabled;
120 extern int acpi_ht;
121 extern int acpi_skip_timer_override;
disable_acpi(void)122 static inline void disable_acpi(void)
123 {
124 acpi_disabled = 1;
125 acpi_ht = 0;
126 acpi_disable_pci();
127 }
128
129 /* Fixmap pages to reserve for ACPI boot-time tables (see fixmap.h) */
130 #define FIX_ACPI_PAGES 4
131
132 #else /* !CONFIG_ACPI_BOOT */
133 #define acpi_lapic 0
134 #define acpi_ioapic 0
135 #endif /* !CONFIG_ACPI_BOOT */
136
137
138 #ifdef CONFIG_ACPI_SLEEP
139
140 /* routines for saving/restoring kernel state */
141 extern int acpi_save_state_mem(void);
142 extern int acpi_save_state_disk(void);
143 extern void acpi_restore_state_mem(void);
144
145 extern unsigned long acpi_wakeup_address;
146
147 /* early initialization routine */
148 extern void acpi_reserve_bootmem(void);
149
150 #endif /*CONFIG_ACPI_SLEEP*/
151
152 #define boot_cpu_physical_apicid boot_cpu_id
153
154 #endif /*__KERNEL__*/
155
156 #endif /*_ASM_ACPI_H*/
157