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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() local_irq_disable()
52#define ACPI_ENABLE_IRQS() local_irq_enable()
53#define ACPI_FLUSH_CPU_CACHE() wbinvd()
54
55
56static inline int
57__acpi_acquire_global_lock (unsigned int *lock)
58{
59 unsigned int old, new, val;
60 do {
61 old = *lock;
62 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
63 val = cmpxchg(lock, old, new);
64 } while (unlikely (val != old));
65 return (new < 3) ? -1 : 0;
66}
67
68static inline int
69__acpi_release_global_lock (unsigned int *lock)
70{
71 unsigned int old, new, val;
72 do {
73 old = *lock;
74 new = old & ~0x3;
75 val = cmpxchg(lock, old, new);
76 } while (unlikely (val != old));
77 return old & 0x1;
78}
79
80#define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \
81 ((Acq) = __acpi_acquire_global_lock((unsigned int *) GLptr))
82
83#define ACPI_RELEASE_GLOBAL_LOCK(GLptr, Acq) \
84 ((Acq) = __acpi_release_global_lock((unsigned int *) GLptr))
85
86/*
87 * Math helper asm macros
88 */
89#define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
90 asm("divl %2;" \
91 :"=a"(q32), "=d"(r32) \
92 :"r"(d32), \
93 "0"(n_lo), "1"(n_hi))
94
95
96#define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
97 asm("shrl $1,%2;" \
98 "rcrl $1,%3;" \
99 :"=r"(n_hi), "=r"(n_lo) \
100 :"0"(n_hi), "1"(n_lo))
101
102/*
103 * Refer Intel ACPI _PDC support document for bit definitions
104 */
105#define ACPI_PDC_EST_CAPABILITY_SMP 0xa
106#define ACPI_PDC_EST_CAPABILITY_MSR 0x1
107
108#ifdef CONFIG_ACPI_BOOT
109extern int acpi_lapic;
110extern int acpi_ioapic;
111extern int acpi_noirq;
112extern int acpi_strict;
113extern int acpi_disabled;
114extern int acpi_pci_disabled;
115extern int acpi_ht;
116static inline void disable_acpi(void)
117{
118 acpi_disabled = 1;
119 acpi_ht = 0;
120 acpi_pci_disabled = 1;
121 acpi_noirq = 1;
122}
123
124/* Fixmap pages to reserve for ACPI boot-time tables (see fixmap.h) */
125#define FIX_ACPI_PAGES 4
126
127extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
128
129#else /* !CONFIG_ACPI_BOOT */
130#define acpi_lapic 0
131#define acpi_ioapic 0
132#endif /* !CONFIG_ACPI_BOOT */
133
134extern int acpi_numa;
135extern int acpi_scan_nodes(unsigned long start, unsigned long end);
136#define NR_NODE_MEMBLKS (MAX_NUMNODES*2)
137
138#ifdef CONFIG_ACPI_PCI
139static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
140static inline void acpi_disable_pci(void)
141{
142 acpi_pci_disabled = 1;
143 acpi_noirq_set();
144}
145extern int acpi_irq_balance_set(char *str);
146#else
147static inline void acpi_noirq_set(void) { }
148static inline void acpi_disable_pci(void) { }
149static inline int acpi_irq_balance_set(char *str) { return 0; }
150#endif
151
152#ifdef CONFIG_ACPI_SLEEP
153
154/* routines for saving/restoring kernel state */
155extern int acpi_save_state_mem(void);
156extern void acpi_restore_state_mem(void);
157
158extern unsigned long acpi_wakeup_address;
159
160/* early initialization routine */
161extern void acpi_reserve_bootmem(void);
162
163#endif /*CONFIG_ACPI_SLEEP*/
164
165#define boot_cpu_physical_apicid boot_cpu_id
166
167extern int acpi_disabled;
168extern int acpi_pci_disabled;
169
170extern u8 x86_acpiid_to_apicid[];
171
172extern int acpi_skip_timer_override;
173
174#endif /*__KERNEL__*/
175
176#endif /*_ASM_ACPI_H*/
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