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/*
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* ACPI implementation
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*
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* Copyright (c) 2006 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2 as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "vl.h" |
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//#define DEBUG
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/* i82731AB (PIIX4) compatible power management function */
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#define PM_FREQ 3579545 |
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#define ACPI_DBG_IO_ADDR 0xb044 |
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#define SMB_IO_BASE 0xb100 |
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|
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typedef struct PIIX4PMState { |
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PCIDevice dev; |
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uint16_t pmsts; |
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uint16_t pmen; |
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uint16_t pmcntrl; |
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uint8_t apmc; |
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uint8_t apms; |
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QEMUTimer *tmr_timer; |
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int64_t tmr_overflow_time; |
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SMBusDevice *smb_dev[128];
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uint8_t smb_stat; |
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uint8_t smb_ctl; |
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uint8_t smb_cmd; |
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uint8_t smb_addr; |
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uint8_t smb_data0; |
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uint8_t smb_data1; |
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uint8_t smb_data[32];
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uint8_t smb_index; |
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} PIIX4PMState; |
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#define RTC_EN (1 << 10) |
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#define PWRBTN_EN (1 << 8) |
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#define GBL_EN (1 << 5) |
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#define TMROF_EN (1 << 0) |
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|
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#define SCI_EN (1 << 0) |
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#define SUS_EN (1 << 13) |
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#define SMBHSTSTS 0x00 |
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#define SMBHSTCNT 0x02 |
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#define SMBHSTCMD 0x03 |
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#define SMBHSTADD 0x04 |
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#define SMBHSTDAT0 0x05 |
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#define SMBHSTDAT1 0x06 |
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#define SMBBLKDAT 0x07 |
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/* Note: only used for piix4_smbus_register_device */
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static PIIX4PMState *piix4_pm_state;
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static uint32_t get_pmtmr(PIIX4PMState *s)
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{ |
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uint32_t d; |
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d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec); |
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return d & 0xffffff; |
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} |
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|
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static int get_pmsts(PIIX4PMState *s) |
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{ |
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int64_t d; |
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int pmsts;
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pmsts = s->pmsts; |
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d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec); |
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if (d >= s->tmr_overflow_time)
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s->pmsts |= TMROF_EN; |
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return pmsts;
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} |
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static void pm_update_sci(PIIX4PMState *s) |
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{ |
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int sci_level, pmsts;
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int64_t expire_time; |
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pmsts = get_pmsts(s); |
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sci_level = (((pmsts & s->pmen) & |
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(RTC_EN | PWRBTN_EN | GBL_EN | TMROF_EN)) != 0);
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qemu_set_irq(s->dev.irq[0], sci_level);
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/* schedule a timer interruption if needed */
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if ((s->pmen & TMROF_EN) && !(pmsts & TMROF_EN)) {
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expire_time = muldiv64(s->tmr_overflow_time, ticks_per_sec, PM_FREQ); |
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qemu_mod_timer(s->tmr_timer, expire_time); |
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} else {
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qemu_del_timer(s->tmr_timer); |
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} |
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} |
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static void pm_tmr_timer(void *opaque) |
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{ |
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PIIX4PMState *s = opaque; |
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pm_update_sci(s); |
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} |
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|
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static void pm_ioport_writew(void *opaque, uint32_t addr, uint32_t val) |
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{ |
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PIIX4PMState *s = opaque; |
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addr &= 0x3f;
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switch(addr) {
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case 0x00: |
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{ |
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int64_t d; |
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int pmsts;
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pmsts = get_pmsts(s); |
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if (pmsts & val & TMROF_EN) {
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/* if TMRSTS is reset, then compute the new overflow time */
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d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec); |
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s->tmr_overflow_time = (d + 0x800000LL) & ~0x7fffffLL; |
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} |
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s->pmsts &= ~val; |
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pm_update_sci(s); |
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} |
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break;
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case 0x02: |
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s->pmen = val; |
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pm_update_sci(s); |
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break;
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case 0x04: |
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{ |
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int sus_typ;
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s->pmcntrl = val & ~(SUS_EN); |
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if (val & SUS_EN) {
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/* change suspend type */
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sus_typ = (val >> 10) & 3; |
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switch(sus_typ) {
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case 0: /* soft power off */ |
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qemu_system_shutdown_request(); |
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break;
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default:
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break;
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} |
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} |
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} |
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break;
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default:
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break;
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} |
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#ifdef DEBUG
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printf("PM writew port=0x%04x val=0x%04x\n", addr, val);
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#endif
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} |
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static uint32_t pm_ioport_readw(void *opaque, uint32_t addr) |
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{ |
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PIIX4PMState *s = opaque; |
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uint32_t val; |
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addr &= 0x3f;
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switch(addr) {
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case 0x00: |
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val = get_pmsts(s); |
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break;
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case 0x02: |
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val = s->pmen; |
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break;
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case 0x04: |
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val = s->pmcntrl; |
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break;
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default:
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val = 0;
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break;
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} |
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#ifdef DEBUG
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printf("PM readw port=0x%04x val=0x%04x\n", addr, val);
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#endif
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return val;
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} |
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static void pm_ioport_writel(void *opaque, uint32_t addr, uint32_t val) |
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{ |
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// PIIX4PMState *s = opaque;
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addr &= 0x3f;
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#ifdef DEBUG
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printf("PM writel port=0x%04x val=0x%08x\n", addr, val);
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#endif
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} |
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static uint32_t pm_ioport_readl(void *opaque, uint32_t addr) |
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{ |
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PIIX4PMState *s = opaque; |
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uint32_t val; |
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addr &= 0x3f;
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switch(addr) {
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case 0x08: |
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val = get_pmtmr(s); |
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break;
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default:
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val = 0;
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break;
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} |
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#ifdef DEBUG
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printf("PM readl port=0x%04x val=0x%08x\n", addr, val);
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#endif
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return val;
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} |
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static void pm_smi_writeb(void *opaque, uint32_t addr, uint32_t val) |
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{ |
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PIIX4PMState *s = opaque; |
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addr &= 1;
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#ifdef DEBUG
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printf("pm_smi_writeb addr=0x%x val=0x%02x\n", addr, val);
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#endif
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if (addr == 0) { |
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s->apmc = val; |
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if (s->dev.config[0x5b] & (1 << 1)) { |
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cpu_interrupt(first_cpu, CPU_INTERRUPT_SMI); |
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} |
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} else {
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s->apms = val; |
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} |
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} |
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static uint32_t pm_smi_readb(void *opaque, uint32_t addr) |
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{ |
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PIIX4PMState *s = opaque; |
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uint32_t val; |
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addr &= 1;
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if (addr == 0) { |
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val = s->apmc; |
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} else {
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val = s->apms; |
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} |
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#ifdef DEBUG
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printf("pm_smi_readb addr=0x%x val=0x%02x\n", addr, val);
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#endif
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return val;
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} |
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static void acpi_dbg_writel(void *opaque, uint32_t addr, uint32_t val) |
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{ |
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#if defined(DEBUG)
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printf("ACPI: DBG: 0x%08x\n", val);
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#endif
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} |
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static void smb_transaction(PIIX4PMState *s) |
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{ |
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uint8_t prot = (s->smb_ctl >> 2) & 0x07; |
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uint8_t read = s->smb_addr & 0x01;
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uint8_t cmd = s->smb_cmd; |
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uint8_t addr = s->smb_addr >> 1;
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SMBusDevice *dev = s->smb_dev[addr]; |
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#ifdef DEBUG
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printf("SMBus trans addr=0x%02x prot=0x%02x\n", addr, prot);
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#endif
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if (!dev) goto error; |
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switch(prot) {
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case 0x0: |
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if (!dev->quick_cmd) goto error; |
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(*dev->quick_cmd)(dev, read); |
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break;
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case 0x1: |
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if (read) {
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if (!dev->receive_byte) goto error; |
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s->smb_data0 = (*dev->receive_byte)(dev); |
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} |
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else {
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if (!dev->send_byte) goto error; |
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(*dev->send_byte)(dev, cmd); |
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} |
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break;
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case 0x2: |
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if (read) {
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if (!dev->read_byte) goto error; |
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s->smb_data0 = (*dev->read_byte)(dev, cmd); |
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} |
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else {
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if (!dev->write_byte) goto error; |
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(*dev->write_byte)(dev, cmd, s->smb_data0); |
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} |
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break;
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case 0x3: |
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if (read) {
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uint16_t val; |
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if (!dev->read_word) goto error; |
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val = (*dev->read_word)(dev, cmd); |
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s->smb_data0 = val; |
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s->smb_data1 = val >> 8;
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} |
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else {
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if (!dev->write_word) goto error; |
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(*dev->write_word)(dev, cmd, (s->smb_data1 << 8) | s->smb_data0);
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} |
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break;
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case 0x5: |
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if (read) {
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if (!dev->read_block) goto error; |
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s->smb_data0 = (*dev->read_block)(dev, cmd, s->smb_data); |
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} |
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else {
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if (!dev->write_block) goto error; |
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(*dev->write_block)(dev, cmd, s->smb_data0, s->smb_data); |
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} |
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break;
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default:
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goto error;
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} |
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return;
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error:
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s->smb_stat |= 0x04;
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} |
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static void smb_ioport_writeb(void *opaque, uint32_t addr, uint32_t val) |
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{ |
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PIIX4PMState *s = opaque; |
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addr &= 0x3f;
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#ifdef DEBUG
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printf("SMB writeb port=0x%04x val=0x%02x\n", addr, val);
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#endif
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switch(addr) {
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case SMBHSTSTS:
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s->smb_stat = 0;
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s->smb_index = 0;
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break;
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case SMBHSTCNT:
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s->smb_ctl = val; |
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if (val & 0x40) |
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smb_transaction(s); |
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break;
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case SMBHSTCMD:
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s->smb_cmd = val; |
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break;
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case SMBHSTADD:
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s->smb_addr = val; |
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break;
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case SMBHSTDAT0:
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s->smb_data0 = val; |
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break;
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case SMBHSTDAT1:
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s->smb_data1 = val; |
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break;
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case SMBBLKDAT:
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s->smb_data[s->smb_index++] = val; |
356 |
if (s->smb_index > 31) |
357 |
s->smb_index = 0;
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break;
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default:
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360 |
break;
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} |
362 |
} |
363 |
|
364 |
static uint32_t smb_ioport_readb(void *opaque, uint32_t addr) |
365 |
{ |
366 |
PIIX4PMState *s = opaque; |
367 |
uint32_t val; |
368 |
|
369 |
addr &= 0x3f;
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370 |
switch(addr) {
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371 |
case SMBHSTSTS:
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372 |
val = s->smb_stat; |
373 |
break;
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case SMBHSTCNT:
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375 |
s->smb_index = 0;
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val = s->smb_ctl & 0x1f;
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break;
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378 |
case SMBHSTCMD:
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val = s->smb_cmd; |
380 |
break;
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381 |
case SMBHSTADD:
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382 |
val = s->smb_addr; |
383 |
break;
|
384 |
case SMBHSTDAT0:
|
385 |
val = s->smb_data0; |
386 |
break;
|
387 |
case SMBHSTDAT1:
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388 |
val = s->smb_data1; |
389 |
break;
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390 |
case SMBBLKDAT:
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391 |
val = s->smb_data[s->smb_index++]; |
392 |
if (s->smb_index > 31) |
393 |
s->smb_index = 0;
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394 |
break;
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395 |
default:
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396 |
val = 0;
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397 |
break;
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398 |
} |
399 |
#ifdef DEBUG
|
400 |
printf("SMB readb port=0x%04x val=0x%02x\n", addr, val);
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401 |
#endif
|
402 |
return val;
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403 |
} |
404 |
|
405 |
static void pm_io_space_update(PIIX4PMState *s) |
406 |
{ |
407 |
uint32_t pm_io_base; |
408 |
|
409 |
if (s->dev.config[0x80] & 1) { |
410 |
pm_io_base = le32_to_cpu(*(uint32_t *)(s->dev.config + 0x40));
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411 |
pm_io_base &= 0xfffe;
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412 |
|
413 |
/* XXX: need to improve memory and ioport allocation */
|
414 |
#if defined(DEBUG)
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415 |
printf("PM: mapping to 0x%x\n", pm_io_base);
|
416 |
#endif
|
417 |
register_ioport_write(pm_io_base, 64, 2, pm_ioport_writew, s); |
418 |
register_ioport_read(pm_io_base, 64, 2, pm_ioport_readw, s); |
419 |
register_ioport_write(pm_io_base, 64, 4, pm_ioport_writel, s); |
420 |
register_ioport_read(pm_io_base, 64, 4, pm_ioport_readl, s); |
421 |
} |
422 |
} |
423 |
|
424 |
static void pm_write_config(PCIDevice *d, |
425 |
uint32_t address, uint32_t val, int len)
|
426 |
{ |
427 |
pci_default_write_config(d, address, val, len); |
428 |
if (address == 0x80) |
429 |
pm_io_space_update((PIIX4PMState *)d); |
430 |
} |
431 |
|
432 |
static void pm_save(QEMUFile* f,void *opaque) |
433 |
{ |
434 |
PIIX4PMState *s = opaque; |
435 |
|
436 |
pci_device_save(&s->dev, f); |
437 |
|
438 |
qemu_put_be16s(f, &s->pmsts); |
439 |
qemu_put_be16s(f, &s->pmen); |
440 |
qemu_put_be16s(f, &s->pmcntrl); |
441 |
qemu_put_8s(f, &s->apmc); |
442 |
qemu_put_8s(f, &s->apms); |
443 |
qemu_put_timer(f, s->tmr_timer); |
444 |
qemu_put_be64s(f, &s->tmr_overflow_time); |
445 |
} |
446 |
|
447 |
static int pm_load(QEMUFile* f,void* opaque,int version_id) |
448 |
{ |
449 |
PIIX4PMState *s = opaque; |
450 |
int ret;
|
451 |
|
452 |
if (version_id > 1) |
453 |
return -EINVAL;
|
454 |
|
455 |
ret = pci_device_load(&s->dev, f); |
456 |
if (ret < 0) |
457 |
return ret;
|
458 |
|
459 |
qemu_get_be16s(f, &s->pmsts); |
460 |
qemu_get_be16s(f, &s->pmen); |
461 |
qemu_get_be16s(f, &s->pmcntrl); |
462 |
qemu_get_8s(f, &s->apmc); |
463 |
qemu_get_8s(f, &s->apms); |
464 |
qemu_get_timer(f, s->tmr_timer); |
465 |
qemu_get_be64s(f, &s->tmr_overflow_time); |
466 |
|
467 |
pm_io_space_update(s); |
468 |
|
469 |
return 0; |
470 |
} |
471 |
|
472 |
void piix4_pm_init(PCIBus *bus, int devfn) |
473 |
{ |
474 |
PIIX4PMState *s; |
475 |
uint8_t *pci_conf; |
476 |
uint32_t smb_io_base; |
477 |
|
478 |
s = (PIIX4PMState *)pci_register_device(bus, |
479 |
"PM", sizeof(PIIX4PMState), |
480 |
devfn, NULL, pm_write_config);
|
481 |
pci_conf = s->dev.config; |
482 |
pci_conf[0x00] = 0x86; |
483 |
pci_conf[0x01] = 0x80; |
484 |
pci_conf[0x02] = 0x13; |
485 |
pci_conf[0x03] = 0x71; |
486 |
pci_conf[0x08] = 0x00; // revision number |
487 |
pci_conf[0x09] = 0x00; |
488 |
pci_conf[0x0a] = 0x80; // other bridge device |
489 |
pci_conf[0x0b] = 0x06; // bridge device |
490 |
pci_conf[0x0e] = 0x00; // header_type |
491 |
pci_conf[0x3d] = 0x01; // interrupt pin 1 |
492 |
|
493 |
pci_conf[0x40] = 0x01; /* PM io base read only bit */ |
494 |
|
495 |
register_ioport_write(0xb2, 2, 1, pm_smi_writeb, s); |
496 |
register_ioport_read(0xb2, 2, 1, pm_smi_readb, s); |
497 |
|
498 |
register_ioport_write(ACPI_DBG_IO_ADDR, 4, 4, acpi_dbg_writel, s); |
499 |
|
500 |
/* XXX: which specification is used ? The i82731AB has different
|
501 |
mappings */
|
502 |
pci_conf[0x5f] = (parallel_hds[0] != NULL ? 0x80 : 0) | 0x10; |
503 |
pci_conf[0x63] = 0x60; |
504 |
pci_conf[0x67] = (serial_hds[0] != NULL ? 0x08 : 0) | |
505 |
(serial_hds[1] != NULL ? 0x90 : 0); |
506 |
|
507 |
smb_io_base = SMB_IO_BASE; |
508 |
pci_conf[0x90] = smb_io_base | 1; |
509 |
pci_conf[0x91] = smb_io_base >> 8; |
510 |
pci_conf[0xd2] = 0x09; |
511 |
register_ioport_write(smb_io_base, 64, 1, smb_ioport_writeb, s); |
512 |
register_ioport_read(smb_io_base, 64, 1, smb_ioport_readb, s); |
513 |
|
514 |
s->tmr_timer = qemu_new_timer(vm_clock, pm_tmr_timer, s); |
515 |
|
516 |
register_savevm("piix4_pm", 0, 1, pm_save, pm_load, s); |
517 |
piix4_pm_state = s; |
518 |
} |
519 |
|
520 |
void piix4_smbus_register_device(SMBusDevice *dev, uint8_t addr)
|
521 |
{ |
522 |
piix4_pm_state->smb_dev[addr] = dev; |
523 |
} |