1 | // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
2 | /****************************************************************************** |
3 | * |
4 | * Module Name: utxfinit - External interfaces for ACPICA initialization |
5 | * |
6 | * Copyright (C) 2000 - 2023, Intel Corp. |
7 | * |
8 | *****************************************************************************/ |
9 | |
10 | #define EXPORT_ACPI_INTERFACES |
11 | |
12 | #include <acpi/acpi.h> |
13 | #include "accommon.h" |
14 | #include "acevents.h" |
15 | #include "acnamesp.h" |
16 | #include "acdebug.h" |
17 | #include "actables.h" |
18 | |
19 | #define _COMPONENT ACPI_UTILITIES |
20 | ACPI_MODULE_NAME("utxfinit" ) |
21 | |
22 | /* For acpi_exec only */ |
23 | void ae_do_object_overrides(void); |
24 | |
25 | /******************************************************************************* |
26 | * |
27 | * FUNCTION: acpi_initialize_subsystem |
28 | * |
29 | * PARAMETERS: None |
30 | * |
31 | * RETURN: Status |
32 | * |
33 | * DESCRIPTION: Initializes all global variables. This is the first function |
34 | * called, so any early initialization belongs here. |
35 | * |
36 | ******************************************************************************/ |
37 | |
38 | acpi_status ACPI_INIT_FUNCTION acpi_initialize_subsystem(void) |
39 | { |
40 | acpi_status status; |
41 | |
42 | ACPI_FUNCTION_TRACE(acpi_initialize_subsystem); |
43 | |
44 | acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE; |
45 | ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace()); |
46 | |
47 | /* Initialize the OS-Dependent layer */ |
48 | |
49 | status = acpi_os_initialize(); |
50 | if (ACPI_FAILURE(status)) { |
51 | ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization" )); |
52 | return_ACPI_STATUS(status); |
53 | } |
54 | |
55 | /* Initialize all globals used by the subsystem */ |
56 | |
57 | status = acpi_ut_init_globals(); |
58 | if (ACPI_FAILURE(status)) { |
59 | ACPI_EXCEPTION((AE_INFO, status, |
60 | "During initialization of globals" )); |
61 | return_ACPI_STATUS(status); |
62 | } |
63 | |
64 | /* Create the default mutex objects */ |
65 | |
66 | status = acpi_ut_mutex_initialize(); |
67 | if (ACPI_FAILURE(status)) { |
68 | ACPI_EXCEPTION((AE_INFO, status, |
69 | "During Global Mutex creation" )); |
70 | return_ACPI_STATUS(status); |
71 | } |
72 | |
73 | /* |
74 | * Initialize the namespace manager and |
75 | * the root of the namespace tree |
76 | */ |
77 | status = acpi_ns_root_initialize(); |
78 | if (ACPI_FAILURE(status)) { |
79 | ACPI_EXCEPTION((AE_INFO, status, |
80 | "During Namespace initialization" )); |
81 | return_ACPI_STATUS(status); |
82 | } |
83 | |
84 | /* Initialize the global OSI interfaces list with the static names */ |
85 | |
86 | status = acpi_ut_initialize_interfaces(); |
87 | if (ACPI_FAILURE(status)) { |
88 | ACPI_EXCEPTION((AE_INFO, status, |
89 | "During OSI interfaces initialization" )); |
90 | return_ACPI_STATUS(status); |
91 | } |
92 | |
93 | return_ACPI_STATUS(AE_OK); |
94 | } |
95 | |
96 | ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_subsystem) |
97 | |
98 | /******************************************************************************* |
99 | * |
100 | * FUNCTION: acpi_enable_subsystem |
101 | * |
102 | * PARAMETERS: flags - Init/enable Options |
103 | * |
104 | * RETURN: Status |
105 | * |
106 | * DESCRIPTION: Completes the subsystem initialization including hardware. |
107 | * Puts system into ACPI mode if it isn't already. |
108 | * |
109 | ******************************************************************************/ |
110 | acpi_status ACPI_INIT_FUNCTION acpi_enable_subsystem(u32 flags) |
111 | { |
112 | acpi_status status = AE_OK; |
113 | |
114 | ACPI_FUNCTION_TRACE(acpi_enable_subsystem); |
115 | |
116 | /* |
117 | * The early initialization phase is complete. The namespace is loaded, |
118 | * and we can now support address spaces other than Memory, I/O, and |
119 | * PCI_Config. |
120 | */ |
121 | acpi_gbl_early_initialization = FALSE; |
122 | |
123 | #if (!ACPI_REDUCED_HARDWARE) |
124 | |
125 | /* Enable ACPI mode */ |
126 | |
127 | if (!(flags & ACPI_NO_ACPI_ENABLE)) { |
128 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
129 | "[Init] Going into ACPI mode\n" )); |
130 | |
131 | acpi_gbl_original_mode = acpi_hw_get_mode(); |
132 | |
133 | status = acpi_enable(); |
134 | if (ACPI_FAILURE(status)) { |
135 | ACPI_WARNING((AE_INFO, "AcpiEnable failed" )); |
136 | return_ACPI_STATUS(status); |
137 | } |
138 | } |
139 | |
140 | /* |
141 | * Obtain a permanent mapping for the FACS. This is required for the |
142 | * Global Lock and the Firmware Waking Vector |
143 | */ |
144 | if (!(flags & ACPI_NO_FACS_INIT)) { |
145 | status = acpi_tb_initialize_facs(); |
146 | if (ACPI_FAILURE(status)) { |
147 | ACPI_WARNING((AE_INFO, "Could not map the FACS table" )); |
148 | return_ACPI_STATUS(status); |
149 | } |
150 | } |
151 | |
152 | /* |
153 | * Initialize ACPI Event handling (Fixed and General Purpose) |
154 | * |
155 | * Note1: We must have the hardware and events initialized before we can |
156 | * execute any control methods safely. Any control method can require |
157 | * ACPI hardware support, so the hardware must be fully initialized before |
158 | * any method execution! |
159 | * |
160 | * Note2: Fixed events are initialized and enabled here. GPEs are |
161 | * initialized, but cannot be enabled until after the hardware is |
162 | * completely initialized (SCI and global_lock activated) and the various |
163 | * initialization control methods are run (_REG, _STA, _INI) on the |
164 | * entire namespace. |
165 | */ |
166 | if (!(flags & ACPI_NO_EVENT_INIT)) { |
167 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
168 | "[Init] Initializing ACPI events\n" )); |
169 | |
170 | status = acpi_ev_initialize_events(); |
171 | if (ACPI_FAILURE(status)) { |
172 | return_ACPI_STATUS(status); |
173 | } |
174 | } |
175 | |
176 | /* |
177 | * Install the SCI handler and Global Lock handler. This completes the |
178 | * hardware initialization. |
179 | */ |
180 | if (!(flags & ACPI_NO_HANDLER_INIT)) { |
181 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
182 | "[Init] Installing SCI/GL handlers\n" )); |
183 | |
184 | status = acpi_ev_install_xrupt_handlers(); |
185 | if (ACPI_FAILURE(status)) { |
186 | return_ACPI_STATUS(status); |
187 | } |
188 | } |
189 | #endif /* !ACPI_REDUCED_HARDWARE */ |
190 | |
191 | return_ACPI_STATUS(status); |
192 | } |
193 | |
194 | ACPI_EXPORT_SYMBOL_INIT(acpi_enable_subsystem) |
195 | |
196 | /******************************************************************************* |
197 | * |
198 | * FUNCTION: acpi_initialize_objects |
199 | * |
200 | * PARAMETERS: flags - Init/enable Options |
201 | * |
202 | * RETURN: Status |
203 | * |
204 | * DESCRIPTION: Completes namespace initialization by initializing device |
205 | * objects and executing AML code for Regions, buffers, etc. |
206 | * |
207 | ******************************************************************************/ |
208 | acpi_status ACPI_INIT_FUNCTION acpi_initialize_objects(u32 flags) |
209 | { |
210 | acpi_status status = AE_OK; |
211 | |
212 | ACPI_FUNCTION_TRACE(acpi_initialize_objects); |
213 | |
214 | #ifdef ACPI_OBSOLETE_BEHAVIOR |
215 | /* |
216 | * 05/2019: Removed, initialization now happens at both object |
217 | * creation and table load time |
218 | */ |
219 | |
220 | /* |
221 | * Initialize the objects that remain uninitialized. This |
222 | * runs the executable AML that may be part of the |
223 | * declaration of these objects: operation_regions, buffer_fields, |
224 | * bank_fields, Buffers, and Packages. |
225 | */ |
226 | if (!(flags & ACPI_NO_OBJECT_INIT)) { |
227 | status = acpi_ns_initialize_objects(); |
228 | if (ACPI_FAILURE(status)) { |
229 | return_ACPI_STATUS(status); |
230 | } |
231 | } |
232 | #endif |
233 | |
234 | /* |
235 | * Initialize all device/region objects in the namespace. This runs |
236 | * the device _STA and _INI methods and region _REG methods. |
237 | */ |
238 | if (!(flags & (ACPI_NO_DEVICE_INIT | ACPI_NO_ADDRESS_SPACE_INIT))) { |
239 | status = acpi_ns_initialize_devices(flags); |
240 | if (ACPI_FAILURE(status)) { |
241 | return_ACPI_STATUS(status); |
242 | } |
243 | } |
244 | |
245 | /* |
246 | * Empty the caches (delete the cached objects) on the assumption that |
247 | * the table load filled them up more than they will be at runtime -- |
248 | * thus wasting non-paged memory. |
249 | */ |
250 | status = acpi_purge_cached_objects(); |
251 | |
252 | acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK; |
253 | return_ACPI_STATUS(status); |
254 | } |
255 | |
256 | ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_objects) |
257 | |