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 #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 /*
  56  * A brief explanation as GNU inline assembly is a bit hairy
  57  *  %0 is the output parameter in EAX ("=a")
  58  *  %1 and %2 are the input parameters in ECX ("c")
  59  *  and an immediate value ("i") respectively
  60  *  All actual register references are preceded with "%%" as in "%%edx"
  61  *  Immediate values in the assembly are preceded by "$" as in "$0x1"
  62  *  The final asm parameter are the operation altered non-output registers.
  63  */
  64 #define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \
  65     do { \
  66         int dummy; \
  67         asm("1:     movl (%1),%%eax;" \
  68             "movl   %%eax,%%edx;" \
  69             "andl   %2,%%edx;" \
  70             "btsl   $0x1,%%edx;" \
  71             "adcl   $0x0,%%edx;" \
  72             "lock;  cmpxchgl %%edx,(%1);" \
  73             "jnz    1b;" \
  74             "cmpb   $0x3,%%dl;" \
  75             "sbbl   %%eax,%%eax" \
  76             :"=a"(Acq),"=c"(dummy):"c"(GLptr),"i"(~1L):"dx"); \
  77     } while(0)
  78
  79 #define ACPI_RELEASE_GLOBAL_LOCK(GLptr, Acq) \
  80     do { \
  81         int dummy; \
  82         asm("1:     movl (%1),%%eax;" \
  83             "movl   %%eax,%%edx;" \
  84             "andl   %2,%%edx;" \
  85             "lock;  cmpxchgl %%edx,(%1);" \
  86             "jnz    1b;" \
  87             "andl   $0x1,%%eax" \
  88             :"=a"(Acq),"=c"(dummy):"c"(GLptr),"i"(~3L):"dx"); \
  89     } while(0)
  90
  91
  92 /*
  93  * Math helper asm macros
  94  */
  95 #define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
  96         asm("divl %2;"        \
  97         :"=a"(q32), "=d"(r32) \
  98         :"r"(d32),            \
  99         "0"(n_lo), "1"(n_hi))
 100
 101
 102 #define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
 103     asm("shrl   $1,%2;"             \
 104         "rcrl   $1,%3;"             \
 105         :"=r"(n_hi), "=r"(n_lo)     \
 106         :"0"(n_hi), "1"(n_lo))
 107
 108
 109 #ifdef CONFIG_ACPI_BOOT
 110 extern int acpi_lapic;
 111 extern int acpi_ioapic;
 112
 113
 114 /* Fixmap pages to reserve for ACPI boot-time tables (see fixmap.h) */
 115 #define FIX_ACPI_PAGES 4
 116
 117 #ifdef CONFIG_X86_IO_APIC
 118 extern int skip_ioapic_setup;
 119
 120 static inline void disable_ioapic_setup(void)
 121 {
 122         skip_ioapic_setup = 1;
 123 }
 124
 125 static inline int ioapic_setup_disabled(void)
 126 {
 127         return skip_ioapic_setup;
 128 }
 129
 130 #else
 131 static inline void disable_ioapic_setup(void)
 132 { }
 133
 134 #endif
 135
 136 #else   /* CONFIG_ACPI_BOOT */
 137 #  define acpi_lapic 0
 138 #  define acpi_ioapic 0
 139
 140 #endif
 141
 142 #ifdef CONFIG_ACPI_SLEEP
 143
 144 /* routines for saving/restoring kernel state */
 145 extern int acpi_save_state_mem(void);
 146 extern int acpi_save_state_disk(void);
 147 extern void acpi_restore_state_mem(void);
 148
 149 extern unsigned long acpi_wakeup_address;
 150
 151 /* early initialization routine */
 152 extern void acpi_reserve_bootmem(void);
 153
 154 #endif /*CONFIG_ACPI_SLEEP*/
 155
 156 #endif /*__KERNEL__*/
 157
 158 #endif /*_ASM_ACPI_H*/