4 * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Patrick Mochel <mochel@osdl.org>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
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
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
31 #include <asm/system.h> /* defines cmpxchg */
33 #define COMPILER_DEPENDENT_INT64 long long
34 #define COMPILER_DEPENDENT_UINT64 unsigned long long
37 * Calling conventions:
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
44 #define ACPI_SYSTEM_XFACE
45 #define ACPI_EXTERNAL_XFACE
46 #define ACPI_INTERNAL_XFACE
47 #define ACPI_INTERNAL_VAR_XFACE
51 #define ACPI_ASM_MACROS
53 #define ACPI_DISABLE_IRQS() local_irq_disable()
54 #define ACPI_ENABLE_IRQS() local_irq_enable()
55 #define ACPI_FLUSH_CPU_CACHE() wbinvd()
59 __acpi_acquire_global_lock (unsigned int *lock)
61 unsigned int old, new, val;
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;
71 __acpi_release_global_lock (unsigned int *lock)
73 unsigned int old, new, val;
77 val = cmpxchg(lock, old, new);
78 } while (unlikely (val != old));
82 #define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \
83 ((Acq) = __acpi_acquire_global_lock((unsigned int *) GLptr))
85 #define ACPI_RELEASE_GLOBAL_LOCK(GLptr, Acq) \
86 ((Acq) = __acpi_release_global_lock((unsigned int *) GLptr))
89 * Math helper asm macros
91 #define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
93 :"=a"(q32), "=d"(r32) \
98 #define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
101 :"=r"(n_hi), "=r"(n_lo) \
102 :"0"(n_hi), "1"(n_lo))
105 #ifdef CONFIG_ACPI_BOOT
106 extern int acpi_lapic;
107 extern int acpi_ioapic;
108 extern int acpi_noirq;
109 extern int acpi_strict;
110 extern int acpi_disabled;
112 extern int acpi_pci_disabled;
113 static inline void disable_acpi(void)
117 acpi_pci_disabled = 1;
121 /* Fixmap pages to reserve for ACPI boot-time tables (see fixmap.h) */
122 #define FIX_ACPI_PAGES 4
124 extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
125 #ifdef CONFIG_X86_IO_APIC
126 extern int skip_ioapic_setup;
127 extern int acpi_irq_to_vector(u32 irq); /* deprecated in favor of acpi_gsi_to_irq */
128 extern int acpi_skip_timer_override;
130 static inline void disable_ioapic_setup(void)
132 skip_ioapic_setup = 1;
135 static inline int ioapic_setup_disabled(void)
137 return skip_ioapic_setup;
141 static inline void disable_ioapic_setup(void)
146 #else /* CONFIG_ACPI_BOOT */
147 # define acpi_lapic 0
148 # define acpi_ioapic 0
152 #ifdef CONFIG_ACPI_PCI
153 static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
154 static inline void acpi_disable_pci(void)
156 acpi_pci_disabled = 1;
159 extern int acpi_irq_balance_set(char *str);
161 static inline void acpi_noirq_set(void) { }
162 static inline void acpi_disable_pci(void) { }
163 static inline int acpi_irq_balance_set(char *str) { return 0; }
166 #ifdef CONFIG_ACPI_SLEEP
168 /* routines for saving/restoring kernel state */
169 extern int acpi_save_state_mem(void);
170 extern int acpi_save_state_disk(void);
171 extern void acpi_restore_state_mem(void);
173 extern unsigned long acpi_wakeup_address;
175 /* early initialization routine */
176 extern void acpi_reserve_bootmem(void);
178 #endif /*CONFIG_ACPI_SLEEP*/
180 #endif /*__KERNEL__*/
182 #endif /*_ASM_ACPI_H*/