Linux Kernel  3.7.1
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acpi.c
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1 /******************************************************************************
2  * acpi.c
3  * acpi file for domain 0 kernel
4  *
5  * Copyright (c) 2011 Konrad Rzeszutek Wilk <[email protected]>
6  * Copyright (c) 2011 Yu Ke [email protected]
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License version 2
10  * as published by the Free Software Foundation; or, when distributed
11  * separately from the Linux kernel or incorporated into other
12  * software packages, subject to the following license:
13  *
14  * Permission is hereby granted, free of charge, to any person obtaining a copy
15  * of this source file (the "Software"), to deal in the Software without
16  * restriction, including without limitation the rights to use, copy, modify,
17  * merge, publish, distribute, sublicense, and/or sell copies of the Software,
18  * and to permit persons to whom the Software is furnished to do so, subject to
19  * the following conditions:
20  *
21  * The above copyright notice and this permission notice shall be included in
22  * all copies or substantial portions of the Software.
23  *
24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
25  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
27  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
28  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
29  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
30  * IN THE SOFTWARE.
31  */
32 
33 #include <xen/acpi.h>
34 #include <xen/interface/platform.h>
35 #include <asm/xen/hypercall.h>
36 #include <asm/xen/hypervisor.h>
37 
39  u32 pm1a_cnt, u32 pm1b_cnt)
40 {
41  struct xen_platform_op op = {
43  .interface_version = XENPF_INTERFACE_VERSION,
44  .u = {
45  .enter_acpi_sleep = {
46  .pm1a_cnt_val = (u16)pm1a_cnt,
47  .pm1b_cnt_val = (u16)pm1b_cnt,
48  .sleep_state = sleep_state,
49  },
50  },
51  };
52 
53  if ((pm1a_cnt & 0xffff0000) || (pm1b_cnt & 0xffff0000)) {
54  WARN(1, "Using more than 16bits of PM1A/B 0x%x/0x%x!"
55  "Email [email protected] Thank you.\n", \
56  pm1a_cnt, pm1b_cnt);
57  return -1;
58  }
59 
60  HYPERVISOR_dom0_op(&op);
61  return 1;
62 }