include/asm-i386/acpi.h

   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 <acpi/pdc_intel.h>
  32
  33 #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
  60 static 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
  72 static 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
 106 #ifdef CONFIG_X86_IO_APIC
 107 extern void check_acpi_pci(void);
 108 #else
 109 static inline void check_acpi_pci(void) { }
 110 #endif
 111
 112 #ifdef CONFIG_ACPI
 113 extern int acpi_lapic;
 114 extern int acpi_ioapic;
 115 extern int acpi_noirq;
 116 extern int acpi_strict;
 117 extern int acpi_disabled;
 118 extern int acpi_ht;
 119 extern int acpi_pci_disabled;
 120 static inline void disable_acpi(void)
 121 {
 122         acpi_disabled = 1;
 123         acpi_ht = 0;
 124         acpi_pci_disabled = 1;
 125         acpi_noirq = 1;
 126 }
 127
 128 /* Fixmap pages to reserve for ACPI boot-time tables (see fixmap.h) */
 129 #define FIX_ACPI_PAGES 4
 130
 131 extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
 132
 133 #ifdef CONFIG_X86_IO_APIC
 134 extern int acpi_skip_timer_override;
 135 #endif
 136
 137 static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
 138 static inline void acpi_disable_pci(void)
 139 {
 140         acpi_pci_disabled = 1;
 141         acpi_noirq_set();
 142 }
 143 extern int acpi_irq_balance_set(char *str);
 144
 145 #else   /* !CONFIG_ACPI */
 146
 147 #define acpi_lapic 0
 148 #define acpi_ioapic 0
 149 static inline void acpi_noirq_set(void) { }
 150 static inline void acpi_disable_pci(void) { }
 151
 152 #endif  /* !CONFIG_ACPI */
 153
 154
 155 #ifdef CONFIG_ACPI_SLEEP
 156
 157 /* routines for saving/restoring kernel state */
 158 extern int acpi_save_state_mem(void);
 159 extern void acpi_restore_state_mem(void);
 160
 161 extern unsigned long acpi_wakeup_address;
 162
 163 /* early initialization routine */
 164 extern void acpi_reserve_bootmem(void);
 165
 166 #endif /*CONFIG_ACPI_SLEEP*/
 167
 168 extern u8 x86_acpiid_to_apicid[];
 169
 170 #define ARCH_HAS_POWER_INIT     1
 171
 172 #endif /*__KERNEL__*/
 173
 174 #endif /*_ASM_ACPI_H*/