qemu-e2k/hw/acpi_ich9.c

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/*
* ACPI implementation
*
* Copyright (c) 2006 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>
*/
/*
* Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan K.K.
* Copyright (C) 2012 Jason Baron <jbaron@redhat.com>
*
* This is based on acpi.c.
*/
#include "hw.h"
#include "pc.h"
#include "pci.h"
#include "qemu-timer.h"
#include "sysemu.h"
#include "acpi.h"
#include "kvm.h"
#include "exec-memory.h"
#include "ich9.h"
//#define DEBUG
#ifdef DEBUG
#define ICH9_DEBUG(fmt, ...) \
do { printf("%s "fmt, __func__, ## __VA_ARGS__); } while (0)
#else
#define ICH9_DEBUG(fmt, ...) do { } while (0)
#endif
static void pm_ioport_write_fallback(void *opaque, uint32_t addr, int len,
uint32_t val);
static uint32_t pm_ioport_read_fallback(void *opaque, uint32_t addr, int len);
static void pm_update_sci(ICH9LPCPMRegs *pm)
{
int sci_level, pm1a_sts;
pm1a_sts = acpi_pm1_evt_get_sts(&pm->acpi_regs);
sci_level = (((pm1a_sts & pm->acpi_regs.pm1.evt.en) &
(ACPI_BITMASK_RT_CLOCK_ENABLE |
ACPI_BITMASK_POWER_BUTTON_ENABLE |
ACPI_BITMASK_GLOBAL_LOCK_ENABLE |
ACPI_BITMASK_TIMER_ENABLE)) != 0);
qemu_set_irq(pm->irq, sci_level);
/* schedule a timer interruption if needed */
acpi_pm_tmr_update(&pm->acpi_regs,
(pm->acpi_regs.pm1.evt.en & ACPI_BITMASK_TIMER_ENABLE) &&
!(pm1a_sts & ACPI_BITMASK_TIMER_STATUS));
}
static void ich9_pm_update_sci_fn(ACPIREGS *regs)
{
ICH9LPCPMRegs *pm = container_of(regs, ICH9LPCPMRegs, acpi_regs);
pm_update_sci(pm);
}
static void pm_ioport_writeb(void *opaque, uint32_t addr, uint32_t val)
{
ICH9LPCPMRegs *pm = opaque;
switch (addr & ICH9_PMIO_MASK) {
case ICH9_PMIO_GPE0_STS ... (ICH9_PMIO_GPE0_STS + ICH9_PMIO_GPE0_LEN - 1):
acpi_gpe_ioport_writeb(&pm->acpi_regs, addr, val);
break;
default:
break;
}
ICH9_DEBUG("port=0x%04x val=0x%04x\n", addr, val);
}
static uint32_t pm_ioport_readb(void *opaque, uint32_t addr)
{
ICH9LPCPMRegs *pm = opaque;
uint32_t val = 0;
switch (addr & ICH9_PMIO_MASK) {
case ICH9_PMIO_GPE0_STS ... (ICH9_PMIO_GPE0_STS + ICH9_PMIO_GPE0_LEN - 1):
val = acpi_gpe_ioport_readb(&pm->acpi_regs, addr);
break;
default:
val = 0;
break;
}
ICH9_DEBUG("port=0x%04x val=0x%04x\n", addr, val);
return val;
}
static void pm_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
{
ICH9LPCPMRegs *pm = opaque;
switch (addr & ICH9_PMIO_MASK) {
case ICH9_PMIO_PM1_STS:
acpi_pm1_evt_write_sts(&pm->acpi_regs, val);
pm_update_sci(pm);
break;
case ICH9_PMIO_PM1_EN:
pm->acpi_regs.pm1.evt.en = val;
pm_update_sci(pm);
break;
default:
pm_ioport_write_fallback(opaque, addr, 2, val);
break;
}
ICH9_DEBUG("port=0x%04x val=0x%04x\n", addr, val);
}
static uint32_t pm_ioport_readw(void *opaque, uint32_t addr)
{
ICH9LPCPMRegs *pm = opaque;
uint32_t val;
switch (addr & ICH9_PMIO_MASK) {
case ICH9_PMIO_PM1_STS:
val = acpi_pm1_evt_get_sts(&pm->acpi_regs);
break;
case ICH9_PMIO_PM1_EN:
val = pm->acpi_regs.pm1.evt.en;
break;
default:
val = pm_ioport_read_fallback(opaque, addr, 2);
break;
}
ICH9_DEBUG("port=0x%04x val=0x%04x\n", addr, val);
return val;
}
static void pm_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
{
ICH9LPCPMRegs *pm = opaque;
switch (addr & ICH9_PMIO_MASK) {
case ICH9_PMIO_SMI_EN:
pm->smi_en = val;
break;
default:
pm_ioport_write_fallback(opaque, addr, 4, val);
break;
}
ICH9_DEBUG("port=0x%04x val=0x%08x\n", addr, val);
}
static uint32_t pm_ioport_readl(void *opaque, uint32_t addr)
{
ICH9LPCPMRegs *pm = opaque;
uint32_t val;
switch (addr & ICH9_PMIO_MASK) {
case ICH9_PMIO_SMI_EN:
val = pm->smi_en;
break;
default:
val = pm_ioport_read_fallback(opaque, addr, 4);
break;
}
ICH9_DEBUG("port=0x%04x val=0x%08x\n", addr, val);
return val;
}
static void pm_ioport_write_fallback(void *opaque, uint32_t addr, int len,
uint32_t val)
{
int subsize = (len == 4) ? 2 : 1;
IOPortWriteFunc *ioport_write =
(subsize == 2) ? pm_ioport_writew : pm_ioport_writeb;
int i;
for (i = 0; i < len; i += subsize) {
ioport_write(opaque, addr, val);
val >>= 8 * subsize;
}
}
static uint32_t pm_ioport_read_fallback(void *opaque, uint32_t addr, int len)
{
int subsize = (len == 4) ? 2 : 1;
IOPortReadFunc *ioport_read =
(subsize == 2) ? pm_ioport_readw : pm_ioport_readb;
uint32_t val;
int i;
val = 0;
for (i = 0; i < len; i += subsize) {
val <<= 8 * subsize;
val |= ioport_read(opaque, addr);
}
return val;
}
static const MemoryRegionOps pm_io_ops = {
.old_portio = (MemoryRegionPortio[]) {
{ .offset = 0, .len = ICH9_PMIO_SIZE, .size = 1,
.read = pm_ioport_readb, .write = pm_ioport_writeb },
{ .offset = 0, .len = ICH9_PMIO_SIZE, .size = 2,
.read = pm_ioport_readw, .write = pm_ioport_writew },
{ .offset = 0, .len = ICH9_PMIO_SIZE, .size = 4,
.read = pm_ioport_readl, .write = pm_ioport_writel },
PORTIO_END_OF_LIST(),
},
.valid.min_access_size = 1,
.valid.max_access_size = 4,
.impl.min_access_size = 1,
.impl.max_access_size = 4,
.endianness = DEVICE_LITTLE_ENDIAN,
};
void ich9_pm_iospace_update(ICH9LPCPMRegs *pm, uint32_t pm_io_base)
{
ICH9_DEBUG("to 0x%x\n", pm_io_base);
assert((pm_io_base & ICH9_PMIO_MASK) == 0);
pm->pm_io_base = pm_io_base;
memory_region_transaction_begin();
memory_region_set_enabled(&pm->io, pm->pm_io_base != 0);
memory_region_set_address(&pm->io, pm->pm_io_base);
memory_region_transaction_commit();
}
static int ich9_pm_post_load(void *opaque, int version_id)
{
ICH9LPCPMRegs *pm = opaque;
uint32_t pm_io_base = pm->pm_io_base;
pm->pm_io_base = 0;
ich9_pm_iospace_update(pm, pm_io_base);
return 0;
}
#define VMSTATE_GPE_ARRAY(_field, _state) \
{ \
.name = (stringify(_field)), \
.version_id = 0, \
.num = ICH9_PMIO_GPE0_LEN, \
.info = &vmstate_info_uint8, \
.size = sizeof(uint8_t), \
.flags = VMS_ARRAY | VMS_POINTER, \
.offset = vmstate_offset_pointer(_state, _field, uint8_t), \
}
const VMStateDescription vmstate_ich9_pm = {
.name = "ich9_pm",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.post_load = ich9_pm_post_load,
.fields = (VMStateField[]) {
VMSTATE_UINT16(acpi_regs.pm1.evt.sts, ICH9LPCPMRegs),
VMSTATE_UINT16(acpi_regs.pm1.evt.en, ICH9LPCPMRegs),
VMSTATE_UINT16(acpi_regs.pm1.cnt.cnt, ICH9LPCPMRegs),
VMSTATE_TIMER(acpi_regs.tmr.timer, ICH9LPCPMRegs),
VMSTATE_INT64(acpi_regs.tmr.overflow_time, ICH9LPCPMRegs),
VMSTATE_GPE_ARRAY(acpi_regs.gpe.sts, ICH9LPCPMRegs),
VMSTATE_GPE_ARRAY(acpi_regs.gpe.en, ICH9LPCPMRegs),
VMSTATE_UINT32(smi_en, ICH9LPCPMRegs),
VMSTATE_UINT32(smi_sts, ICH9LPCPMRegs),
VMSTATE_END_OF_LIST()
}
};
static void pm_reset(void *opaque)
{
ICH9LPCPMRegs *pm = opaque;
ich9_pm_iospace_update(pm, 0);
acpi_pm1_evt_reset(&pm->acpi_regs);
acpi_pm1_cnt_reset(&pm->acpi_regs);
acpi_pm_tmr_reset(&pm->acpi_regs);
acpi_gpe_reset(&pm->acpi_regs);
if (kvm_enabled()) {
/* Mark SMM as already inited to prevent SMM from running. KVM does not
* support SMM mode. */
pm->smi_en |= ICH9_PMIO_SMI_EN_APMC_EN;
}
pm_update_sci(pm);
}
static void pm_powerdown_req(Notifier *n, void *opaque)
{
ICH9LPCPMRegs *pm = container_of(n, ICH9LPCPMRegs, powerdown_notifier);
acpi_pm1_evt_power_down(&pm->acpi_regs);
}
void ich9_pm_init(ICH9LPCPMRegs *pm, qemu_irq sci_irq, qemu_irq cmos_s3)
{
memory_region_init_io(&pm->io, &pm_io_ops, pm, "ich9-pm", ICH9_PMIO_SIZE);
memory_region_set_enabled(&pm->io, false);
memory_region_add_subregion(get_system_io(), 0, &pm->io);
acpi_pm_tmr_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io);
acpi_pm1_cnt_init(&pm->acpi_regs, &pm->io);
acpi_gpe_init(&pm->acpi_regs, ICH9_PMIO_GPE0_LEN);
acpi_gpe_blk(&pm->acpi_regs, ICH9_PMIO_GPE0_STS);
pm->irq = sci_irq;
qemu_register_reset(pm_reset, pm);
pm->powerdown_notifier.notify = pm_powerdown_req;
qemu_register_powerdown_notifier(&pm->powerdown_notifier);
}