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 <asm/system.h>         /* defines cmpxchg */
  32
  33 #define COMPILER_DEPENDENT_INT64   long long
  34 #define COMPILER_DEPENDENT_UINT64  unsigned long long
  35
  36 /*
  37  * Calling conventions:
  38  *
  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
  43  */
  44 #define ACPI_SYSTEM_XFACE
  45 #define ACPI_EXTERNAL_XFACE
  46 #define ACPI_INTERNAL_XFACE
  47 #define ACPI_INTERNAL_VAR_XFACE
  48
  49 /* Asm macros */
  50
  51 #define ACPI_ASM_MACROS
  52 #define BREAKPOINT3
  53 #define ACPI_DISABLE_IRQS() local_irq_disable()
  54 #define ACPI_ENABLE_IRQS()  local_irq_enable()
  55 #define ACPI_FLUSH_CPU_CACHE()  wbinvd()
  56
  57
  58 static inline int
  59 __acpi_acquire_global_lock (unsigned int *lock)
  60 {
  61         unsigned int old, new, val;
  62         do {
  63                 old = *lock;
  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;
  68 }
  69
  70 static inline int
  71 __acpi_release_global_lock (unsigned int *lock)
  72 {
  73         unsigned int old, new, val;
  74         do {
  75                 old = *lock;
  76                 new = old & ~0x3;
  77                 val = cmpxchg(lock, old, new);
  78         } while (unlikely (val != old));
  79         return old & 0x1;
  80 }
  81
  82 #define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \
  83         ((Acq) = __acpi_acquire_global_lock((unsigned int *) GLptr))
  84
  85 #define ACPI_RELEASE_GLOBAL_LOCK(GLptr, Acq) \
  86         ((Acq) = __acpi_release_global_lock((unsigned int *) GLptr))
  87
  88 /*
  89  * Math helper asm macros
  90  */
  91 #define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
  92         asm("divl %2;"        \
  93         :"=a"(q32), "=d"(r32) \
  94         :"r"(d32),            \
  95         "0"(n_lo), "1"(n_hi))
  96
  97
  98 #define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
  99     asm("shrl   $1,%2;"             \
 100         "rcrl   $1,%3;"             \
 101         :"=r"(n_hi), "=r"(n_lo)     \
 102         :"0"(n_hi), "1"(n_lo))
 103
 104 /*
 105  * Refer Intel ACPI _PDC support document for bit definitions
 106  */
 107 #define ACPI_PDC_EST_CAPABILITY_SMP     0xa
 108 #define ACPI_PDC_EST_CAPABILITY_MSR     0x1
 109
 110 #ifdef CONFIG_ACPI_BOOT
 111 extern int acpi_lapic;
 112 extern int acpi_ioapic;
 113 extern int acpi_noirq;
 114 extern int acpi_strict;
 115 extern int acpi_disabled;
 116 extern int acpi_ht;
 117 extern int acpi_pci_disabled;
 118 static inline void disable_acpi(void)
 119 {
 120         acpi_disabled = 1;
 121         acpi_ht = 0;
 122         acpi_pci_disabled = 1;
 123         acpi_noirq = 1;
 124 }
 125
 126 /* Fixmap pages to reserve for ACPI boot-time tables (see fixmap.h) */
 127 #define FIX_ACPI_PAGES 4
 128
 129 extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
 130
 131 #ifdef CONFIG_X86_IO_APIC
 132 extern int skip_ioapic_setup;
 133 extern int acpi_skip_timer_override;
 134
 135 extern void check_acpi_pci(void);
 136
 137 static inline void disable_ioapic_setup(void)
 138 {
 139         skip_ioapic_setup = 1;
 140 }
 141
 142 static inline int ioapic_setup_disabled(void)
 143 {
 144         return skip_ioapic_setup;
 145 }
 146
 147 #else
 148 static inline void disable_ioapic_setup(void) { }
 149 static inline void check_acpi_pci(void) { }
 150
 151 #endif
 152
 153 #else   /* CONFIG_ACPI_BOOT */
 154 #  define acpi_lapic 0
 155 #  define acpi_ioapic 0
 156
 157 #endif
 158
 159 #ifdef CONFIG_ACPI_PCI
 160 static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
 161 static inline void acpi_disable_pci(void)
 162 {
 163         acpi_pci_disabled = 1;
 164         acpi_noirq_set();
 165 }
 166 extern int acpi_irq_balance_set(char *str);
 167 #else
 168 static inline void acpi_noirq_set(void) { }
 169 static inline void acpi_disable_pci(void) { }
 170 static inline int acpi_irq_balance_set(char *str) { return 0; }
 171 #endif
 172
 173 #ifdef CONFIG_ACPI_SLEEP
 174
 175 /* routines for saving/restoring kernel state */
 176 extern int acpi_save_state_mem(void);
 177 extern void acpi_restore_state_mem(void);
 178
 179 extern unsigned long acpi_wakeup_address;
 180
 181 /* early initialization routine */
 182 extern void acpi_reserve_bootmem(void);
 183
 184 #endif /*CONFIG_ACPI_SLEEP*/
 185
 186 extern u8 x86_acpiid_to_apicid[];
 187
 188 #endif /*__KERNEL__*/
 189
 190 #endif /*_ASM_ACPI_H*/