| 1 | /****************************************************************************** |
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| 2 | * acpi.c |
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| 3 | * acpi file for domain 0 kernel |
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| 4 | * |
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| 5 | * Copyright (c) 2011 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
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| 6 | * Copyright (c) 2011 Yu Ke ke.yu@intel.com |
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| 7 | * |
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| 8 | * This program is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU General Public License version 2 |
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| 10 | * as published by the Free Software Foundation; or, when distributed |
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| 11 | * separately from the Linux kernel or incorporated into other |
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| 12 | * software packages, subject to the following license: |
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| 13 | * |
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| 14 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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| 15 | * of this source file (the "Software"), to deal in the Software without |
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| 16 | * restriction, including without limitation the rights to use, copy, modify, |
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| 17 | * merge, publish, distribute, sublicense, and/or sell copies of the Software, |
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| 18 | * and to permit persons to whom the Software is furnished to do so, subject to |
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| 19 | * the following conditions: |
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| 20 | * |
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| 21 | * The above copyright notice and this permission notice shall be included in |
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| 22 | * all copies or substantial portions of the Software. |
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| 23 | * |
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| 24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 25 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 26 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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| 27 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 28 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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| 29 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
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| 30 | * IN THE SOFTWARE. |
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| 31 | */ |
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| 32 | |
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| 33 | #include <xen/acpi.h> |
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| 34 | #include <xen/interface/platform.h> |
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| 35 | #include <asm/xen/hypercall.h> |
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| 36 | #include <asm/xen/hypervisor.h> |
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| 37 | |
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| 38 | static int xen_acpi_notify_hypervisor_state(u8 sleep_state, |
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| 39 | u32 val_a, u32 val_b, |
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| 40 | bool extended) |
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| 41 | { |
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| 42 | unsigned int bits = extended ? 8 : 16; |
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| 43 | |
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| 44 | struct xen_platform_op op = { |
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| 45 | .cmd = XENPF_enter_acpi_sleep, |
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| 46 | .interface_version = XENPF_INTERFACE_VERSION, |
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| 47 | .u.enter_acpi_sleep = { |
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| 48 | .val_a = (u16)val_a, |
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| 49 | .val_b = (u16)val_b, |
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| 50 | .sleep_state = sleep_state, |
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| 51 | .flags = extended ? XENPF_ACPI_SLEEP_EXTENDED : 0, |
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| 52 | }, |
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| 53 | }; |
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| 54 | |
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| 55 | if (WARN((val_a & (~0 << bits)) || (val_b & (~0 << bits)), |
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| 56 | "Using more than %u bits of sleep control values %#x/%#x!" |
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| 57 | "Email xen-devel@lists.xen.org - Thank you.\n" , \ |
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| 58 | bits, val_a, val_b)) |
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| 59 | return -1; |
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| 60 | |
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| 61 | HYPERVISOR_platform_op(op: &op); |
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| 62 | return 1; |
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| 63 | } |
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| 64 | |
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| 65 | int xen_acpi_notify_hypervisor_sleep(u8 sleep_state, |
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| 66 | u32 pm1a_cnt, u32 pm1b_cnt) |
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| 67 | { |
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| 68 | return xen_acpi_notify_hypervisor_state(sleep_state, val_a: pm1a_cnt, |
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| 69 | val_b: pm1b_cnt, extended: false); |
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| 70 | } |
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| 71 | |
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| 72 | int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state, |
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| 73 | u32 val_a, u32 val_b) |
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| 74 | { |
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| 75 | return xen_acpi_notify_hypervisor_state(sleep_state, val_a, |
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| 76 | val_b, extended: true); |
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| 77 | } |
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| 78 | |
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