| /* |
| * 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, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #include "vl.h" |
| |
| //#define DEBUG |
| |
| /* i82731AB (PIIX4) compatible power management function */ |
| #define PM_FREQ 3579545 |
| |
| #define ACPI_DBG_IO_ADDR 0xb044 |
| |
| typedef struct PIIX4PMState { |
| PCIDevice dev; |
| uint16_t pmsts; |
| uint16_t pmen; |
| uint16_t pmcntrl; |
| uint8_t apmc; |
| uint8_t apms; |
| QEMUTimer *tmr_timer; |
| int64_t tmr_overflow_time; |
| } PIIX4PMState; |
| |
| #define RTC_EN (1 << 10) |
| #define PWRBTN_EN (1 << 8) |
| #define GBL_EN (1 << 5) |
| #define TMROF_EN (1 << 0) |
| |
| #define SCI_EN (1 << 0) |
| |
| #define SUS_EN (1 << 13) |
| |
| static uint32_t get_pmtmr(PIIX4PMState *s) |
| { |
| uint32_t d; |
| d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec); |
| return d & 0xffffff; |
| } |
| |
| static int get_pmsts(PIIX4PMState *s) |
| { |
| int64_t d; |
| int pmsts; |
| pmsts = s->pmsts; |
| d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec); |
| if (d >= s->tmr_overflow_time) |
| s->pmsts |= TMROF_EN; |
| return pmsts; |
| } |
| |
| static void pm_update_sci(PIIX4PMState *s) |
| { |
| int sci_level, pmsts; |
| int64_t expire_time; |
| |
| pmsts = get_pmsts(s); |
| sci_level = (((pmsts & s->pmen) & |
| (RTC_EN | PWRBTN_EN | GBL_EN | TMROF_EN)) != 0); |
| pci_set_irq(&s->dev, 0, sci_level); |
| /* schedule a timer interruption if needed */ |
| if ((s->pmen & TMROF_EN) && !(pmsts & TMROF_EN)) { |
| expire_time = muldiv64(s->tmr_overflow_time, ticks_per_sec, PM_FREQ); |
| qemu_mod_timer(s->tmr_timer, expire_time); |
| } else { |
| qemu_del_timer(s->tmr_timer); |
| } |
| } |
| |
| static void pm_tmr_timer(void *opaque) |
| { |
| PIIX4PMState *s = opaque; |
| pm_update_sci(s); |
| } |
| |
| static void pm_ioport_writew(void *opaque, uint32_t addr, uint32_t val) |
| { |
| PIIX4PMState *s = opaque; |
| addr &= 0x3f; |
| switch(addr) { |
| case 0x00: |
| { |
| int64_t d; |
| int pmsts; |
| pmsts = get_pmsts(s); |
| if (pmsts & val & TMROF_EN) { |
| /* if TMRSTS is reset, then compute the new overflow time */ |
| d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec); |
| s->tmr_overflow_time = (d + 0x800000LL) & ~0x7fffffLL; |
| } |
| s->pmsts &= ~val; |
| pm_update_sci(s); |
| } |
| break; |
| case 0x02: |
| s->pmen = val; |
| pm_update_sci(s); |
| break; |
| case 0x04: |
| { |
| int sus_typ; |
| s->pmcntrl = val & ~(SUS_EN); |
| if (val & SUS_EN) { |
| /* change suspend type */ |
| sus_typ = (val >> 10) & 3; |
| switch(sus_typ) { |
| case 0: /* soft power off */ |
| qemu_system_shutdown_request(); |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| break; |
| default: |
| break; |
| } |
| #ifdef DEBUG |
| printf("PM writew port=0x%04x val=0x%04x\n", addr, val); |
| #endif |
| } |
| |
| static uint32_t pm_ioport_readw(void *opaque, uint32_t addr) |
| { |
| PIIX4PMState *s = opaque; |
| uint32_t val; |
| |
| addr &= 0x3f; |
| switch(addr) { |
| case 0x00: |
| val = get_pmsts(s); |
| break; |
| case 0x02: |
| val = s->pmen; |
| break; |
| case 0x04: |
| val = s->pmcntrl; |
| break; |
| default: |
| val = 0; |
| break; |
| } |
| #ifdef DEBUG |
| printf("PM readw port=0x%04x val=0x%04x\n", addr, val); |
| #endif |
| return val; |
| } |
| |
| static void pm_ioport_writel(void *opaque, uint32_t addr, uint32_t val) |
| { |
| // PIIX4PMState *s = opaque; |
| addr &= 0x3f; |
| #ifdef DEBUG |
| printf("PM writel port=0x%04x val=0x%08x\n", addr, val); |
| #endif |
| } |
| |
| static uint32_t pm_ioport_readl(void *opaque, uint32_t addr) |
| { |
| PIIX4PMState *s = opaque; |
| uint32_t val; |
| |
| addr &= 0x3f; |
| switch(addr) { |
| case 0x08: |
| val = get_pmtmr(s); |
| break; |
| default: |
| val = 0; |
| break; |
| } |
| #ifdef DEBUG |
| printf("PM readl port=0x%04x val=0x%08x\n", addr, val); |
| #endif |
| return val; |
| } |
| |
| static void pm_smi_writeb(void *opaque, uint32_t addr, uint32_t val) |
| { |
| PIIX4PMState *s = opaque; |
| addr &= 1; |
| #ifdef DEBUG |
| printf("pm_smi_writeb addr=0x%x val=0x%02x\n", addr, val); |
| #endif |
| if (addr == 0) { |
| s->apmc = val; |
| if (s->dev.config[0x5b] & (1 << 1)) { |
| cpu_interrupt(first_cpu, CPU_INTERRUPT_SMI); |
| } |
| } else { |
| s->apms = val; |
| } |
| } |
| |
| static uint32_t pm_smi_readb(void *opaque, uint32_t addr) |
| { |
| PIIX4PMState *s = opaque; |
| uint32_t val; |
| |
| addr &= 1; |
| if (addr == 0) { |
| val = s->apmc; |
| } else { |
| val = s->apms; |
| } |
| #ifdef DEBUG |
| printf("pm_smi_readb addr=0x%x val=0x%02x\n", addr, val); |
| #endif |
| return val; |
| } |
| |
| static void acpi_dbg_writel(void *opaque, uint32_t addr, uint32_t val) |
| { |
| #if defined(DEBUG) |
| printf("ACPI: DBG: 0x%08x\n", val); |
| #endif |
| } |
| |
| static void pm_io_space_update(PIIX4PMState *s) |
| { |
| uint32_t pm_io_base; |
| |
| if (s->dev.config[0x80] & 1) { |
| pm_io_base = le32_to_cpu(*(uint32_t *)(s->dev.config + 0x40)); |
| pm_io_base &= 0xfffe; |
| |
| /* XXX: need to improve memory and ioport allocation */ |
| #if defined(DEBUG) |
| printf("PM: mapping to 0x%x\n", pm_io_base); |
| #endif |
| register_ioport_write(pm_io_base, 64, 2, pm_ioport_writew, s); |
| register_ioport_read(pm_io_base, 64, 2, pm_ioport_readw, s); |
| register_ioport_write(pm_io_base, 64, 4, pm_ioport_writel, s); |
| register_ioport_read(pm_io_base, 64, 4, pm_ioport_readl, s); |
| } |
| } |
| |
| static void pm_write_config(PCIDevice *d, |
| uint32_t address, uint32_t val, int len) |
| { |
| pci_default_write_config(d, address, val, len); |
| if (address == 0x80) |
| pm_io_space_update((PIIX4PMState *)d); |
| } |
| |
| static void pm_save(QEMUFile* f,void *opaque) |
| { |
| PIIX4PMState *s = opaque; |
| |
| pci_device_save(&s->dev, f); |
| |
| qemu_put_be16s(f, &s->pmsts); |
| qemu_put_be16s(f, &s->pmen); |
| qemu_put_be16s(f, &s->pmcntrl); |
| qemu_put_8s(f, &s->apmc); |
| qemu_put_8s(f, &s->apms); |
| qemu_put_timer(f, s->tmr_timer); |
| qemu_put_be64s(f, &s->tmr_overflow_time); |
| } |
| |
| static int pm_load(QEMUFile* f,void* opaque,int version_id) |
| { |
| PIIX4PMState *s = opaque; |
| int ret; |
| |
| if (version_id > 1) |
| return -EINVAL; |
| |
| ret = pci_device_load(&s->dev, f); |
| if (ret < 0) |
| return ret; |
| |
| qemu_get_be16s(f, &s->pmsts); |
| qemu_get_be16s(f, &s->pmen); |
| qemu_get_be16s(f, &s->pmcntrl); |
| qemu_get_8s(f, &s->apmc); |
| qemu_get_8s(f, &s->apms); |
| qemu_get_timer(f, s->tmr_timer); |
| qemu_get_be64s(f, &s->tmr_overflow_time); |
| |
| pm_io_space_update(s); |
| |
| return 0; |
| } |
| |
| void piix4_pm_init(PCIBus *bus, int devfn) |
| { |
| PIIX4PMState *s; |
| uint8_t *pci_conf; |
| |
| s = (PIIX4PMState *)pci_register_device(bus, |
| "PM", sizeof(PIIX4PMState), |
| devfn, NULL, pm_write_config); |
| pci_conf = s->dev.config; |
| pci_conf[0x00] = 0x86; |
| pci_conf[0x01] = 0x80; |
| pci_conf[0x02] = 0x13; |
| pci_conf[0x03] = 0x71; |
| pci_conf[0x08] = 0x00; // revision number |
| pci_conf[0x09] = 0x00; |
| pci_conf[0x0a] = 0x80; // other bridge device |
| pci_conf[0x0b] = 0x06; // bridge device |
| pci_conf[0x0e] = 0x00; // header_type |
| pci_conf[0x3d] = 0x01; // interrupt pin 1 |
| |
| pci_conf[0x40] = 0x01; /* PM io base read only bit */ |
| |
| register_ioport_write(0xb2, 2, 1, pm_smi_writeb, s); |
| register_ioport_read(0xb2, 2, 1, pm_smi_readb, s); |
| |
| register_ioport_write(ACPI_DBG_IO_ADDR, 4, 4, acpi_dbg_writel, s); |
| |
| /* XXX: which specification is used ? The i82731AB has different |
| mappings */ |
| pci_conf[0x5f] = (parallel_hds[0] != NULL ? 0x80 : 0) | 0x10; |
| pci_conf[0x63] = 0x60; |
| pci_conf[0x67] = (serial_hds[0] != NULL ? 0x08 : 0) | |
| (serial_hds[1] != NULL ? 0x90 : 0); |
| |
| s->tmr_timer = qemu_new_timer(vm_clock, pm_tmr_timer, s); |
| |
| register_savevm("piix4_pm", 0, 1, pm_save, pm_load, s); |
| } |
