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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -040031#include <acpi/pdc_intel.h>
32
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <asm/system.h> /* defines cmpxchg */
34
35#define COMPILER_DEPENDENT_INT64 long long
36#define COMPILER_DEPENDENT_UINT64 unsigned long long
37
38/*
39 * Calling conventions:
40 *
41 * ACPI_SYSTEM_XFACE - Interfaces to host OS (handlers, threads)
42 * ACPI_EXTERNAL_XFACE - External ACPI interfaces
43 * ACPI_INTERNAL_XFACE - Internal ACPI interfaces
44 * ACPI_INTERNAL_VAR_XFACE - Internal variable-parameter list interfaces
45 */
46#define ACPI_SYSTEM_XFACE
47#define ACPI_EXTERNAL_XFACE
48#define ACPI_INTERNAL_XFACE
49#define ACPI_INTERNAL_VAR_XFACE
50
51/* Asm macros */
52
53#define ACPI_ASM_MACROS
54#define BREAKPOINT3
55#define ACPI_DISABLE_IRQS() local_irq_disable()
56#define ACPI_ENABLE_IRQS() local_irq_enable()
57#define ACPI_FLUSH_CPU_CACHE() wbinvd()
58
59
60static inline int
61__acpi_acquire_global_lock (unsigned int *lock)
62{
63 unsigned int old, new, val;
64 do {
65 old = *lock;
66 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
67 val = cmpxchg(lock, old, new);
68 } while (unlikely (val != old));
69 return (new < 3) ? -1 : 0;
70}
71
72static inline int
73__acpi_release_global_lock (unsigned int *lock)
74{
75 unsigned int old, new, val;
76 do {
77 old = *lock;
78 new = old & ~0x3;
79 val = cmpxchg(lock, old, new);
80 } while (unlikely (val != old));
81 return old & 0x1;
82}
83
84#define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \
85 ((Acq) = __acpi_acquire_global_lock((unsigned int *) GLptr))
86
87#define ACPI_RELEASE_GLOBAL_LOCK(GLptr, Acq) \
88 ((Acq) = __acpi_release_global_lock((unsigned int *) GLptr))
89
90/*
91 * Math helper asm macros
92 */
93#define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
94 asm("divl %2;" \
95 :"=a"(q32), "=d"(r32) \
96 :"r"(d32), \
97 "0"(n_lo), "1"(n_hi))
98
99
100#define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
101 asm("shrl $1,%2;" \
102 "rcrl $1,%3;" \
103 :"=r"(n_hi), "=r"(n_lo) \
104 :"0"(n_hi), "1"(n_lo))
105
Len Brown888ba6c2005-08-24 12:07:20 -0400106#ifdef CONFIG_ACPI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107extern int acpi_lapic;
108extern int acpi_ioapic;
109extern int acpi_noirq;
110extern int acpi_strict;
111extern int acpi_disabled;
112extern int acpi_ht;
113extern int acpi_pci_disabled;
114static inline void disable_acpi(void)
115{
116 acpi_disabled = 1;
117 acpi_ht = 0;
118 acpi_pci_disabled = 1;
119 acpi_noirq = 1;
120}
121
122/* Fixmap pages to reserve for ACPI boot-time tables (see fixmap.h) */
123#define FIX_ACPI_PAGES 4
124
125extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
126
127#ifdef CONFIG_X86_IO_APIC
128extern int skip_ioapic_setup;
129extern int acpi_skip_timer_override;
130
131extern void check_acpi_pci(void);
132
133static inline void disable_ioapic_setup(void)
134{
135 skip_ioapic_setup = 1;
136}
137
138static inline int ioapic_setup_disabled(void)
139{
140 return skip_ioapic_setup;
141}
142
143#else
144static inline void disable_ioapic_setup(void) { }
145static inline void check_acpi_pci(void) { }
146
147#endif
148
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
150static inline void acpi_disable_pci(void)
151{
152 acpi_pci_disabled = 1;
153 acpi_noirq_set();
154}
155extern int acpi_irq_balance_set(char *str);
Len Brown6153df7b2005-08-25 12:27:09 -0400156
157#else /* !CONFIG_ACPI */
158
159#define acpi_lapic 0
160#define acpi_ioapic 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161static inline void acpi_noirq_set(void) { }
162static inline void acpi_disable_pci(void) { }
Len Brown6153df7b2005-08-25 12:27:09 -0400163
164#endif /* !CONFIG_ACPI */
165
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
167#ifdef CONFIG_ACPI_SLEEP
168
169/* routines for saving/restoring kernel state */
170extern int acpi_save_state_mem(void);
171extern void acpi_restore_state_mem(void);
172
173extern unsigned long acpi_wakeup_address;
174
175/* early initialization routine */
176extern void acpi_reserve_bootmem(void);
177
178#endif /*CONFIG_ACPI_SLEEP*/
179
180extern u8 x86_acpiid_to_apicid[];
181
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400182#define ARCH_HAS_POWER_PDC_INIT 1
183
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184#endif /*__KERNEL__*/
185
186#endif /*_ASM_ACPI_H*/