hw/acpi_ich9.c

   1 /*
   2  * ACPI implementation
   3  *
   4  * Copyright (c) 2006 Fabrice Bellard
   5  * Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp>
   6  *                    VA Linux Systems Japan K.K.
   7  * Copyright (C) 2012 Jason Baron <jbaron@redhat.com>
   8  *
   9  * This is based on acpi.c.
  10  *
  11  * This library is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License version 2 as published by the Free Software Foundation.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, see <http://www.gnu.org/licenses/>
  22  *
  23  * Contributions after 2012-01-13 are licensed under the terms of the
  24  * GNU GPL, version 2 or (at your option) any later version.
  25  */
  26 #include "hw.h"
  27 #include "pc.h"
  28 #include "pci/pci.h"
  29 #include "qemu/timer.h"
  30 #include "sysemu/sysemu.h"
  31 #include "acpi.h"
  32 #include "sysemu/kvm.h"
  33 #include "exec/address-spaces.h"
  34
  35 #include "ich9.h"
  36
  37 //#define DEBUG
  38
  39 #ifdef DEBUG
  40 #define ICH9_DEBUG(fmt, ...) \
  41 do { printf("%s "fmt, __func__, ## __VA_ARGS__); } while (0)
  42 #else
  43 #define ICH9_DEBUG(fmt, ...)    do { } while (0)
  44 #endif
  45
  46 static void pm_update_sci(ICH9LPCPMRegs *pm)
  47 {
  48     int sci_level, pm1a_sts;
  49
  50     pm1a_sts = acpi_pm1_evt_get_sts(&pm->acpi_regs);
  51
  52     sci_level = (((pm1a_sts & pm->acpi_regs.pm1.evt.en) &
  53                   (ACPI_BITMASK_RT_CLOCK_ENABLE |
  54                    ACPI_BITMASK_POWER_BUTTON_ENABLE |
  55                    ACPI_BITMASK_GLOBAL_LOCK_ENABLE |
  56                    ACPI_BITMASK_TIMER_ENABLE)) != 0);
  57     qemu_set_irq(pm->irq, sci_level);
  58
  59     /* schedule a timer interruption if needed */
  60     acpi_pm_tmr_update(&pm->acpi_regs,
  61                        (pm->acpi_regs.pm1.evt.en & ACPI_BITMASK_TIMER_ENABLE) &&
  62                        !(pm1a_sts & ACPI_BITMASK_TIMER_STATUS));
  63 }
  64
  65 static void ich9_pm_update_sci_fn(ACPIREGS *regs)
  66 {
  67     ICH9LPCPMRegs *pm = container_of(regs, ICH9LPCPMRegs, acpi_regs);
  68     pm_update_sci(pm);
  69 }
  70
  71 static uint64_t ich9_gpe_readb(void *opaque, hwaddr addr, unsigned width)
  72 {
  73     ICH9LPCPMRegs *pm = opaque;
  74     return acpi_gpe_ioport_readb(&pm->acpi_regs, addr);
  75 }
  76
  77 static void ich9_gpe_writeb(void *opaque, hwaddr addr, uint64_t val,
  78                             unsigned width)
  79 {
  80     ICH9LPCPMRegs *pm = opaque;
  81     acpi_gpe_ioport_writeb(&pm->acpi_regs, addr, val);
  82 }
  83
  84 static const MemoryRegionOps ich9_gpe_ops = {
  85     .read = ich9_gpe_readb,
  86     .write = ich9_gpe_writeb,
  87     .valid.min_access_size = 1,
  88     .valid.max_access_size = 4,
  89     .impl.min_access_size = 1,
  90     .impl.max_access_size = 1,
  91     .endianness = DEVICE_LITTLE_ENDIAN,
  92 };
  93
  94 static uint64_t ich9_smi_readl(void *opaque, hwaddr addr, unsigned width)
  95 {
  96     ICH9LPCPMRegs *pm = opaque;
  97     switch (addr) {
  98     case 0:
  99         return pm->smi_en;
 100     case 4:
 101         return pm->smi_sts;
 102     default:
 103         return 0;
 104     }
 105 }
 106
 107 static void ich9_smi_writel(void *opaque, hwaddr addr, uint64_t val,
 108                             unsigned width)
 109 {
 110     ICH9LPCPMRegs *pm = opaque;
 111     switch (addr) {
 112     case 0:
 113         pm->smi_en = val;
 114         break;
 115     }
 116 }
 117
 118 static const MemoryRegionOps ich9_smi_ops = {
 119     .read = ich9_smi_readl,
 120     .write = ich9_smi_writel,
 121     .valid.min_access_size = 4,
 122     .valid.max_access_size = 4,
 123     .endianness = DEVICE_LITTLE_ENDIAN,
 124 };
 125
 126 void ich9_pm_iospace_update(ICH9LPCPMRegs *pm, uint32_t pm_io_base)
 127 {
 128     ICH9_DEBUG("to 0x%x\n", pm_io_base);
 129
 130     assert((pm_io_base & ICH9_PMIO_MASK) == 0);
 131
 132     pm->pm_io_base = pm_io_base;
 133     memory_region_transaction_begin();
 134     memory_region_set_enabled(&pm->io, pm->pm_io_base != 0);
 135     memory_region_set_address(&pm->io, pm->pm_io_base);
 136     memory_region_transaction_commit();
 137 }
 138
 139 static int ich9_pm_post_load(void *opaque, int version_id)
 140 {
 141     ICH9LPCPMRegs *pm = opaque;
 142     uint32_t pm_io_base = pm->pm_io_base;
 143     pm->pm_io_base = 0;
 144     ich9_pm_iospace_update(pm, pm_io_base);
 145     return 0;
 146 }
 147
 148 #define VMSTATE_GPE_ARRAY(_field, _state)                            \
 149  {                                                                   \
 150      .name       = (stringify(_field)),                              \
 151      .version_id = 0,                                                \
 152      .num        = ICH9_PMIO_GPE0_LEN,                               \
 153      .info       = &vmstate_info_uint8,                              \
 154      .size       = sizeof(uint8_t),                                  \
 155      .flags      = VMS_ARRAY | VMS_POINTER,                          \
 156      .offset     = vmstate_offset_pointer(_state, _field, uint8_t),  \
 157  }
 158
 159 const VMStateDescription vmstate_ich9_pm = {
 160     .name = "ich9_pm",
 161     .version_id = 1,
 162     .minimum_version_id = 1,
 163     .minimum_version_id_old = 1,
 164     .post_load = ich9_pm_post_load,
 165     .fields = (VMStateField[]) {
 166         VMSTATE_UINT16(acpi_regs.pm1.evt.sts, ICH9LPCPMRegs),
 167         VMSTATE_UINT16(acpi_regs.pm1.evt.en, ICH9LPCPMRegs),
 168         VMSTATE_UINT16(acpi_regs.pm1.cnt.cnt, ICH9LPCPMRegs),
 169         VMSTATE_TIMER(acpi_regs.tmr.timer, ICH9LPCPMRegs),
 170         VMSTATE_INT64(acpi_regs.tmr.overflow_time, ICH9LPCPMRegs),
 171         VMSTATE_GPE_ARRAY(acpi_regs.gpe.sts, ICH9LPCPMRegs),
 172         VMSTATE_GPE_ARRAY(acpi_regs.gpe.en, ICH9LPCPMRegs),
 173         VMSTATE_UINT32(smi_en, ICH9LPCPMRegs),
 174         VMSTATE_UINT32(smi_sts, ICH9LPCPMRegs),
 175         VMSTATE_END_OF_LIST()
 176     }
 177 };
 178
 179 static void pm_reset(void *opaque)
 180 {
 181     ICH9LPCPMRegs *pm = opaque;
 182     ich9_pm_iospace_update(pm, 0);
 183
 184     acpi_pm1_evt_reset(&pm->acpi_regs);
 185     acpi_pm1_cnt_reset(&pm->acpi_regs);
 186     acpi_pm_tmr_reset(&pm->acpi_regs);
 187     acpi_gpe_reset(&pm->acpi_regs);
 188
 189     if (kvm_enabled()) {
 190         /* Mark SMM as already inited to prevent SMM from running. KVM does not
 191          * support SMM mode. */
 192         pm->smi_en |= ICH9_PMIO_SMI_EN_APMC_EN;
 193     }
 194
 195     pm_update_sci(pm);
 196 }
 197
 198 static void pm_powerdown_req(Notifier *n, void *opaque)
 199 {
 200     ICH9LPCPMRegs *pm = container_of(n, ICH9LPCPMRegs, powerdown_notifier);
 201
 202     acpi_pm1_evt_power_down(&pm->acpi_regs);
 203 }
 204
 205 void ich9_pm_init(ICH9LPCPMRegs *pm, qemu_irq sci_irq, qemu_irq cmos_s3)
 206 {
 207     memory_region_init(&pm->io, "ich9-pm", ICH9_PMIO_SIZE);
 208     memory_region_set_enabled(&pm->io, false);
 209     memory_region_add_subregion(get_system_io(), 0, &pm->io);
 210
 211     acpi_pm_tmr_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io);
 212     acpi_pm1_evt_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io);
 213     acpi_pm1_cnt_init(&pm->acpi_regs, &pm->io);
 214
 215     acpi_gpe_init(&pm->acpi_regs, ICH9_PMIO_GPE0_LEN);
 216     memory_region_init_io(&pm->io_gpe, &ich9_gpe_ops, pm, "apci-gpe0",
 217                           ICH9_PMIO_GPE0_LEN);
 218     memory_region_add_subregion(&pm->io, ICH9_PMIO_GPE0_STS, &pm->io_gpe);
 219
 220     memory_region_init_io(&pm->io_smi, &ich9_smi_ops, pm, "apci-smi",
 221                           8);
 222     memory_region_add_subregion(&pm->io, ICH9_PMIO_SMI_EN, &pm->io_smi);
 223
 224     pm->irq = sci_irq;
 225     qemu_register_reset(pm_reset, pm);
 226     pm->powerdown_notifier.notify = pm_powerdown_req;
 227     qemu_register_powerdown_notifier(&pm->powerdown_notifier);
 228 }