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6595 | serge | 1 | /* |
2 | * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $) |
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3 | * |
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4 | * Copyright (C) 2001, 2002 Paul Diefenbaugh |
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5 | * |
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6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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7 | * |
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8 | * This program is free software; you can redistribute it and/or modify |
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9 | * it under the terms of the GNU General Public License as published by |
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10 | * the Free Software Foundation; either version 2 of the License, or (at |
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11 | * your option) any later version. |
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12 | * |
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13 | * This program is distributed in the hope that it will be useful, but |
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14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 | * General Public License for more details. |
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17 | * |
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18 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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19 | */ |
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20 | |||
21 | #include |
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22 | #include |
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23 | #include |
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24 | #include |
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25 | #include |
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26 | #include |
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27 | #include |
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28 | #include |
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29 | |||
30 | #include "internal.h" |
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31 | struct acpi_device *acpi_root; |
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32 | #ifdef CONFIG_X86 |
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33 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
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34 | static inline int set_copy_dsdt(const struct dmi_system_id *id) |
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35 | { |
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36 | return 0; |
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37 | } |
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38 | #else |
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39 | static int set_copy_dsdt(const struct dmi_system_id *id) |
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40 | { |
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41 | printk(KERN_NOTICE "%s detected - " |
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42 | "force copy of DSDT to local memory\n", id->ident); |
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43 | acpi_gbl_copy_dsdt_locally = 1; |
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44 | return 0; |
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45 | } |
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46 | #endif |
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47 | |||
48 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { |
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49 | /* |
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50 | * Invoke DSDT corruption work-around on all Toshiba Satellite. |
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51 | * https://bugzilla.kernel.org/show_bug.cgi?id=14679 |
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52 | */ |
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53 | { |
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54 | .callback = set_copy_dsdt, |
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55 | .ident = "TOSHIBA Satellite", |
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56 | .matches = { |
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57 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), |
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58 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), |
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59 | }, |
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60 | }, |
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61 | {} |
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62 | }; |
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63 | #else |
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64 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { |
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65 | {} |
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66 | }; |
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67 | #endif |
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68 | /** |
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69 | * acpi_early_init - Initialize ACPICA and populate the ACPI namespace. |
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70 | * |
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71 | * The ACPI tables are accessible after this, but the handling of events has not |
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72 | * been initialized and the global lock is not available yet, so AML should not |
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73 | * be executed at this point. |
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74 | * |
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75 | * Doing this before switching the EFI runtime services to virtual mode allows |
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76 | * the EfiBootServices memory to be freed slightly earlier on boot. |
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77 | */ |
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78 | void __init acpi_early_init(void) |
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79 | { |
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80 | acpi_status status; |
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81 | |||
82 | if (acpi_disabled) |
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83 | return; |
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84 | |||
85 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
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86 | |||
87 | /* It's safe to verify table checksums during late stage */ |
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88 | acpi_gbl_verify_table_checksum = TRUE; |
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89 | |||
90 | /* enable workarounds, unless strict ACPI spec. compliance */ |
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91 | if (!acpi_strict) |
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92 | acpi_gbl_enable_interpreter_slack = TRUE; |
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93 | |||
94 | acpi_gbl_permanent_mmap = 1; |
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95 | |||
96 | /* |
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97 | * If the machine falls into the DMI check table, |
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98 | * DSDT will be copied to memory |
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99 | */ |
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100 | dmi_check_system(dsdt_dmi_table); |
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101 | |||
102 | status = acpi_reallocate_root_table(); |
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103 | if (ACPI_FAILURE(status)) { |
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104 | printk(KERN_ERR PREFIX |
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105 | "Unable to reallocate ACPI tables\n"); |
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106 | goto error0; |
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107 | } |
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108 | |||
109 | status = acpi_initialize_subsystem(); |
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110 | if (ACPI_FAILURE(status)) { |
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111 | printk(KERN_ERR PREFIX |
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112 | "Unable to initialize the ACPI Interpreter\n"); |
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113 | goto error0; |
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114 | } |
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115 | |||
116 | status = acpi_load_tables(); |
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117 | if (ACPI_FAILURE(status)) { |
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118 | printk(KERN_ERR PREFIX |
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119 | "Unable to load the System Description Tables\n"); |
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120 | goto error0; |
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121 | } |
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122 | |||
123 | #ifdef CONFIG_X86 |
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124 | if (!acpi_ioapic) { |
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125 | /* compatible (0) means level (3) */ |
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126 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
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127 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; |
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128 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; |
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129 | } |
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130 | /* Set PIC-mode SCI trigger type */ |
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131 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
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132 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
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133 | } else { |
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134 | /* |
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135 | * now that acpi_gbl_FADT is initialized, |
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136 | * update it with result from INT_SRC_OVR parsing |
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137 | */ |
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138 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
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139 | } |
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140 | #endif |
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141 | return; |
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142 | |||
143 | error0: |
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144 | disable_acpi(); |
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145 | } |