]>
Commit | Line | Data |
---|---|---|
1 | /******************************************************************************* | |
2 | * | |
3 | * Module Name: evsci - System Control Interrupt configuration and | |
4 | * legacy to ACPI mode state transition functions | |
5 | * | |
6 | ******************************************************************************/ | |
7 | ||
8 | /* | |
9 | * Copyright (C) 2000 - 2015, Intel Corp. | |
10 | * All rights reserved. | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions, and the following disclaimer, | |
17 | * without modification. | |
18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
19 | * substantially similar to the "NO WARRANTY" disclaimer below | |
20 | * ("Disclaimer") and any redistribution must be conditioned upon | |
21 | * including a substantially similar Disclaimer requirement for further | |
22 | * binary redistribution. | |
23 | * 3. Neither the names of the above-listed copyright holders nor the names | |
24 | * of any contributors may be used to endorse or promote products derived | |
25 | * from this software without specific prior written permission. | |
26 | * | |
27 | * Alternatively, this software may be distributed under the terms of the | |
28 | * GNU General Public License ("GPL") version 2 as published by the Free | |
29 | * Software Foundation. | |
30 | * | |
31 | * NO WARRANTY | |
32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
42 | * POSSIBILITY OF SUCH DAMAGES. | |
43 | */ | |
44 | ||
45 | #include <acpi/acpi.h> | |
46 | #include "accommon.h" | |
47 | #include "acevents.h" | |
48 | ||
49 | #define _COMPONENT ACPI_EVENTS | |
50 | ACPI_MODULE_NAME("evsci") | |
51 | #if (!ACPI_REDUCED_HARDWARE) /* Entire module */ | |
52 | /* Local prototypes */ | |
53 | static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context); | |
54 | ||
55 | /******************************************************************************* | |
56 | * | |
57 | * FUNCTION: acpi_ev_sci_dispatch | |
58 | * | |
59 | * PARAMETERS: None | |
60 | * | |
61 | * RETURN: Status code indicates whether interrupt was handled. | |
62 | * | |
63 | * DESCRIPTION: Dispatch the SCI to all host-installed SCI handlers. | |
64 | * | |
65 | ******************************************************************************/ | |
66 | ||
67 | u32 acpi_ev_sci_dispatch(void) | |
68 | { | |
69 | struct acpi_sci_handler_info *sci_handler; | |
70 | acpi_cpu_flags flags; | |
71 | u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; | |
72 | ||
73 | ACPI_FUNCTION_NAME(ev_sci_dispatch); | |
74 | ||
75 | /* Are there any host-installed SCI handlers? */ | |
76 | ||
77 | if (!acpi_gbl_sci_handler_list) { | |
78 | return (int_status); | |
79 | } | |
80 | ||
81 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
82 | ||
83 | /* Invoke all host-installed SCI handlers */ | |
84 | ||
85 | sci_handler = acpi_gbl_sci_handler_list; | |
86 | while (sci_handler) { | |
87 | ||
88 | /* Invoke the installed handler (at interrupt level) */ | |
89 | ||
90 | int_status |= sci_handler->address(sci_handler->context); | |
91 | ||
92 | sci_handler = sci_handler->next; | |
93 | } | |
94 | ||
95 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
96 | return (int_status); | |
97 | } | |
98 | ||
99 | /******************************************************************************* | |
100 | * | |
101 | * FUNCTION: acpi_ev_sci_xrupt_handler | |
102 | * | |
103 | * PARAMETERS: context - Calling Context | |
104 | * | |
105 | * RETURN: Status code indicates whether interrupt was handled. | |
106 | * | |
107 | * DESCRIPTION: Interrupt handler that will figure out what function or | |
108 | * control method to call to deal with a SCI. | |
109 | * | |
110 | ******************************************************************************/ | |
111 | ||
112 | static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context) | |
113 | { | |
114 | struct acpi_gpe_xrupt_info *gpe_xrupt_list = context; | |
115 | u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED; | |
116 | ||
117 | ACPI_FUNCTION_TRACE(ev_sci_xrupt_handler); | |
118 | ||
119 | /* | |
120 | * We are guaranteed by the ACPICA initialization/shutdown code that | |
121 | * if this interrupt handler is installed, ACPI is enabled. | |
122 | */ | |
123 | ||
124 | /* | |
125 | * Fixed Events: | |
126 | * Check for and dispatch any Fixed Events that have occurred | |
127 | */ | |
128 | interrupt_handled |= acpi_ev_fixed_event_detect(); | |
129 | ||
130 | /* | |
131 | * General Purpose Events: | |
132 | * Check for and dispatch any GPEs that have occurred | |
133 | */ | |
134 | interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list); | |
135 | ||
136 | /* Invoke all host-installed SCI handlers */ | |
137 | ||
138 | interrupt_handled |= acpi_ev_sci_dispatch(); | |
139 | ||
140 | acpi_sci_count++; | |
141 | return_UINT32(interrupt_handled); | |
142 | } | |
143 | ||
144 | /******************************************************************************* | |
145 | * | |
146 | * FUNCTION: acpi_ev_gpe_xrupt_handler | |
147 | * | |
148 | * PARAMETERS: context - Calling Context | |
149 | * | |
150 | * RETURN: Status code indicates whether interrupt was handled. | |
151 | * | |
152 | * DESCRIPTION: Handler for GPE Block Device interrupts | |
153 | * | |
154 | ******************************************************************************/ | |
155 | ||
156 | u32 ACPI_SYSTEM_XFACE acpi_ev_gpe_xrupt_handler(void *context) | |
157 | { | |
158 | struct acpi_gpe_xrupt_info *gpe_xrupt_list = context; | |
159 | u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED; | |
160 | ||
161 | ACPI_FUNCTION_TRACE(ev_gpe_xrupt_handler); | |
162 | ||
163 | /* | |
164 | * We are guaranteed by the ACPICA initialization/shutdown code that | |
165 | * if this interrupt handler is installed, ACPI is enabled. | |
166 | */ | |
167 | ||
168 | /* GPEs: Check for and dispatch any GPEs that have occurred */ | |
169 | ||
170 | interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list); | |
171 | return_UINT32(interrupt_handled); | |
172 | } | |
173 | ||
174 | /****************************************************************************** | |
175 | * | |
176 | * FUNCTION: acpi_ev_install_sci_handler | |
177 | * | |
178 | * PARAMETERS: none | |
179 | * | |
180 | * RETURN: Status | |
181 | * | |
182 | * DESCRIPTION: Installs SCI handler. | |
183 | * | |
184 | ******************************************************************************/ | |
185 | ||
186 | u32 acpi_ev_install_sci_handler(void) | |
187 | { | |
188 | u32 status = AE_OK; | |
189 | ||
190 | ACPI_FUNCTION_TRACE(ev_install_sci_handler); | |
191 | ||
192 | status = | |
193 | acpi_os_install_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt, | |
194 | acpi_ev_sci_xrupt_handler, | |
195 | acpi_gbl_gpe_xrupt_list_head); | |
196 | return_ACPI_STATUS(status); | |
197 | } | |
198 | ||
199 | /****************************************************************************** | |
200 | * | |
201 | * FUNCTION: acpi_ev_remove_all_sci_handlers | |
202 | * | |
203 | * PARAMETERS: none | |
204 | * | |
205 | * RETURN: AE_OK if handler uninstalled, AE_ERROR if handler was not | |
206 | * installed to begin with | |
207 | * | |
208 | * DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be | |
209 | * taken. Remove all host-installed SCI handlers. | |
210 | * | |
211 | * Note: It doesn't seem important to disable all events or set the event | |
212 | * enable registers to their original values. The OS should disable | |
213 | * the SCI interrupt level when the handler is removed, so no more | |
214 | * events will come in. | |
215 | * | |
216 | ******************************************************************************/ | |
217 | ||
218 | acpi_status acpi_ev_remove_all_sci_handlers(void) | |
219 | { | |
220 | struct acpi_sci_handler_info *sci_handler; | |
221 | acpi_cpu_flags flags; | |
222 | acpi_status status; | |
223 | ||
224 | ACPI_FUNCTION_TRACE(ev_remove_all_sci_handlers); | |
225 | ||
226 | /* Just let the OS remove the handler and disable the level */ | |
227 | ||
228 | status = | |
229 | acpi_os_remove_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt, | |
230 | acpi_ev_sci_xrupt_handler); | |
231 | ||
232 | if (!acpi_gbl_sci_handler_list) { | |
233 | return (status); | |
234 | } | |
235 | ||
236 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
237 | ||
238 | /* Free all host-installed SCI handlers */ | |
239 | ||
240 | while (acpi_gbl_sci_handler_list) { | |
241 | sci_handler = acpi_gbl_sci_handler_list; | |
242 | acpi_gbl_sci_handler_list = sci_handler->next; | |
243 | ACPI_FREE(sci_handler); | |
244 | } | |
245 | ||
246 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
247 | return_ACPI_STATUS(status); | |
248 | } | |
249 | ||
250 | #endif /* !ACPI_REDUCED_HARDWARE */ |