projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 211063dc KRW |
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 | ||
| be6b25d1 BG |
38 | static int xen_acpi_notify_hypervisor_state(u8 sleep_state, |
| 39 | u32 val_a, u32 val_b, | |
| 40 | bool extended) | |
| 211063dc | 41 | { |
| be6b25d1 BG |
42 | unsigned int bits = extended ? 8 : 16; |
| 43 | ||
| 211063dc KRW |
44 | struct xen_platform_op op = { |
| 45 | .cmd = XENPF_enter_acpi_sleep, | |
| 46 | .interface_version = XENPF_INTERFACE_VERSION, | |
| be6b25d1 BG |
47 | .u.enter_acpi_sleep = { |
| 48 | .val_a = (u16)val_a, | |
| 49 | .val_b = (u16)val_b, | |
| 50 | .sleep_state = sleep_state, | |
| 51 | .flags = extended ? XENPF_ACPI_SLEEP_EXTENDED : 0, | |
| 211063dc KRW |
52 | }, |
| 53 | }; | |
| 54 | ||
| be6b25d1 BG |
55 | if (WARN((val_a & (~0 << bits)) || (val_b & (~0 << bits)), |
| 56 | "Using more than %u bits of sleep control values %#x/%#x!" | |
| 57 | "Email [email protected] - Thank you.\n", \ | |
| 58 | bits, val_a, val_b)) | |
| 211063dc | 59 | return -1; |
| 211063dc | 60 | |
| cfafae94 | 61 | HYPERVISOR_platform_op(&op); |
| 211063dc KRW |
62 | return 1; |
| 63 | } | |
| be6b25d1 BG |
64 | |
| 65 | int xen_acpi_notify_hypervisor_sleep(u8 sleep_state, | |
| 66 | u32 pm1a_cnt, u32 pm1b_cnt) | |
| 67 | { | |
| 68 | return xen_acpi_notify_hypervisor_state(sleep_state, pm1a_cnt, | |
| 69 | pm1b_cnt, false); | |
| 70 | } | |
| 71 | ||
| 72 | int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state, | |
| 73 | u32 val_a, u32 val_b) | |
| 74 | { | |
| 75 | return xen_acpi_notify_hypervisor_state(sleep_state, val_a, | |
| 76 | val_b, true); | |
| 77 | } |