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422 | giacomo | 1 | /* |
2 | * asm-i386/acpi.h |
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3 | * |
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4 | * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
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5 | * Copyright (C) 2001 Patrick Mochel <mochel@osdl.org> |
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6 | * |
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7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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8 | * |
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9 | * This program is free software; you can redistribute it and/or modify |
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10 | * it under the terms of the GNU General Public License as published by |
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11 | * the Free Software Foundation; either version 2 of the License, or |
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12 | * (at your option) any later version. |
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13 | * |
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14 | * This program is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | * GNU General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with this program; if not, write to the Free Software |
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21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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22 | * |
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23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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24 | */ |
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25 | |||
26 | #ifndef _ASM_ACPI_H |
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27 | #define _ASM_ACPI_H |
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28 | |||
29 | #ifdef __KERNEL__ |
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30 | |||
31 | #define COMPILER_DEPENDENT_INT64 long long |
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32 | #define COMPILER_DEPENDENT_UINT64 unsigned long long |
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33 | |||
34 | /* |
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35 | * Calling conventions: |
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36 | * |
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37 | * ACPI_SYSTEM_XFACE - Interfaces to host OS (handlers, threads) |
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38 | * ACPI_EXTERNAL_XFACE - External ACPI interfaces |
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39 | * ACPI_INTERNAL_XFACE - Internal ACPI interfaces |
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40 | * ACPI_INTERNAL_VAR_XFACE - Internal variable-parameter list interfaces |
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41 | */ |
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42 | #define ACPI_SYSTEM_XFACE |
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43 | #define ACPI_EXTERNAL_XFACE |
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44 | #define ACPI_INTERNAL_XFACE |
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45 | #define ACPI_INTERNAL_VAR_XFACE |
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46 | |||
47 | /* Asm macros */ |
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48 | |||
49 | #define ACPI_ASM_MACROS |
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50 | #define BREAKPOINT3 |
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51 | #define ACPI_DISABLE_IRQS() local_irq_disable() |
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52 | #define ACPI_ENABLE_IRQS() local_irq_enable() |
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53 | #define ACPI_FLUSH_CPU_CACHE() wbinvd() |
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54 | |||
55 | /* |
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56 | * A brief explanation as GNU inline assembly is a bit hairy |
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57 | * %0 is the output parameter in EAX ("=a") |
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58 | * %1 and %2 are the input parameters in ECX ("c") |
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59 | * and an immediate value ("i") respectively |
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60 | * All actual register references are preceded with "%%" as in "%%edx" |
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61 | * Immediate values in the assembly are preceded by "$" as in "$0x1" |
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62 | * The final asm parameter are the operation altered non-output registers. |
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63 | */ |
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64 | #define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \ |
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65 | do { \ |
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66 | int dummy; \ |
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67 | asm("1: movl (%1),%%eax;" \ |
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68 | "movl %%eax,%%edx;" \ |
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69 | "andl %2,%%edx;" \ |
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70 | "btsl $0x1,%%edx;" \ |
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71 | "adcl $0x0,%%edx;" \ |
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72 | "lock; cmpxchgl %%edx,(%1);" \ |
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73 | "jnz 1b;" \ |
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74 | "cmpb $0x3,%%dl;" \ |
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75 | "sbbl %%eax,%%eax" \ |
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76 | :"=a"(Acq),"=c"(dummy):"c"(GLptr),"i"(~1L):"dx"); \ |
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77 | } while(0) |
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78 | |||
79 | #define ACPI_RELEASE_GLOBAL_LOCK(GLptr, Acq) \ |
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80 | do { \ |
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81 | int dummy; \ |
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82 | asm("1: movl (%1),%%eax;" \ |
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83 | "movl %%eax,%%edx;" \ |
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84 | "andl %2,%%edx;" \ |
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85 | "lock; cmpxchgl %%edx,(%1);" \ |
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86 | "jnz 1b;" \ |
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87 | "andl $0x1,%%eax" \ |
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88 | :"=a"(Acq),"=c"(dummy):"c"(GLptr),"i"(~3L):"dx"); \ |
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89 | } while(0) |
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90 | |||
91 | |||
92 | /* |
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93 | * Math helper asm macros |
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94 | */ |
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95 | #define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \ |
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96 | asm("divl %2;" \ |
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97 | :"=a"(q32), "=d"(r32) \ |
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98 | :"r"(d32), \ |
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99 | "0"(n_lo), "1"(n_hi)) |
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100 | |||
101 | |||
102 | #define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \ |
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103 | asm("shrl $1,%2;" \ |
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104 | "rcrl $1,%3;" \ |
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105 | :"=r"(n_hi), "=r"(n_lo) \ |
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106 | :"0"(n_hi), "1"(n_lo)) |
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107 | |||
108 | |||
109 | #ifdef CONFIG_ACPI_BOOT |
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110 | extern int acpi_lapic; |
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111 | extern int acpi_ioapic; |
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112 | |||
113 | |||
114 | /* Fixmap pages to reserve for ACPI boot-time tables (see fixmap.h) */ |
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115 | #define FIX_ACPI_PAGES 4 |
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116 | |||
117 | #ifdef CONFIG_X86_IO_APIC |
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118 | extern int skip_ioapic_setup; |
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119 | |||
120 | static inline void disable_ioapic_setup(void) |
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121 | { |
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122 | skip_ioapic_setup = 1; |
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123 | } |
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124 | |||
125 | static inline int ioapic_setup_disabled(void) |
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126 | { |
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127 | return skip_ioapic_setup; |
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128 | } |
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129 | |||
130 | #else |
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131 | static inline void disable_ioapic_setup(void) |
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132 | { } |
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133 | |||
134 | #endif |
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135 | |||
136 | #else /* CONFIG_ACPI_BOOT */ |
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137 | # define acpi_lapic 0 |
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138 | # define acpi_ioapic 0 |
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139 | |||
140 | #endif |
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141 | |||
142 | #ifdef CONFIG_ACPI_SLEEP |
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143 | |||
144 | /* routines for saving/restoring kernel state */ |
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145 | extern int acpi_save_state_mem(void); |
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146 | extern int acpi_save_state_disk(void); |
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147 | extern void acpi_restore_state_mem(void); |
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148 | |||
149 | extern unsigned long acpi_wakeup_address; |
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150 | |||
151 | /* early initialization routine */ |
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152 | extern void acpi_reserve_bootmem(void); |
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153 | |||
154 | #endif /*CONFIG_ACPI_SLEEP*/ |
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155 | |||
156 | #endif /*__KERNEL__*/ |
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157 | |||
158 | #endif /*_ASM_ACPI_H*/ |