linux/drivers/xen/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 <konrad.wilk@oracle.com>
   6 * Copyright (c) 2011 Yu Ke ke.yu@intel.com
   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
  38int xen_acpi_notify_hypervisor_state(u8 sleep_state,
  39                                     u32 pm1a_cnt, u32 pm1b_cnt)
  40{
  41        struct xen_platform_op op = {
  42                .cmd = XENPF_enter_acpi_sleep,
  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 xen-devel@lists.xensource.com  Thank you.\n", \
  56                     pm1a_cnt, pm1b_cnt);
  57                return -1;
  58        }
  59
  60        HYPERVISOR_dom0_op(&op);
  61        return 1;
  62}
  63
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