/* * QEMU ICH9 TCO emulation * * Copyright (c) 2015 Paulo Alcantara <pcacjr@zytor.com> * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. */ #include "qemu/osdep.h" #include "qemu-common.h" #include "sysemu/watchdog.h" #include "hw/i386/ich9.h" #include "hw/acpi/tco.h" #include "trace.h" //#define DEBUG #ifdef DEBUG #define TCO_DEBUG(fmt, ...) \ do { \ fprintf(stderr, "%s "fmt, __func__, ## __VA_ARGS__); \ } while (0) #else #define TCO_DEBUG(fmt, ...) do { } while (0) #endif enum { TCO_RLD_DEFAULT = 0x0000, TCO_DAT_IN_DEFAULT = 0x00, TCO_DAT_OUT_DEFAULT = 0x00, TCO1_STS_DEFAULT = 0x0000, TCO2_STS_DEFAULT = 0x0000, TCO1_CNT_DEFAULT = 0x0000, TCO2_CNT_DEFAULT = 0x0008, TCO_MESSAGE1_DEFAULT = 0x00, TCO_MESSAGE2_DEFAULT = 0x00, TCO_WDCNT_DEFAULT = 0x00, TCO_TMR_DEFAULT = 0x0004, SW_IRQ_GEN_DEFAULT = 0x03, }; static inline void tco_timer_reload(TCOIORegs *tr) { int ticks = tr->tco.tmr & TCO_TMR_MASK; int64_t nsec = (int64_t)ticks * TCO_TICK_NSEC; trace_tco_timer_reload(ticks, nsec / 1000000); tr->expire_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + nsec; timer_mod(tr->tco_timer, tr->expire_time); } static inline void tco_timer_stop(TCOIORegs *tr) { tr->expire_time = -1; timer_del(tr->tco_timer); } static void tco_timer_expired(void *opaque) { TCOIORegs *tr = opaque; ICH9LPCPMRegs *pm = container_of(tr, ICH9LPCPMRegs, tco_regs); ICH9LPCState *lpc = container_of(pm, ICH9LPCState, pm); uint32_t gcs = pci_get_long(lpc->chip_config + ICH9_CC_GCS); trace_tco_timer_expired(tr->timeouts_no, lpc->pin_strap.spkr_hi, !!(gcs & ICH9_CC_GCS_NO_REBOOT)); tr->tco.rld = 0; tr->tco.sts1 |= TCO_TIMEOUT; if (++tr->timeouts_no == 2) { tr->tco.sts2 |= TCO_SECOND_TO_STS; tr->tco.sts2 |= TCO_BOOT_STS; tr->timeouts_no = 0; if (!lpc->pin_strap.spkr_hi && !(gcs & ICH9_CC_GCS_NO_REBOOT)) { watchdog_perform_action(); tco_timer_stop(tr); return; } } if (pm->smi_en & ICH9_PMIO_SMI_EN_TCO_EN) { ich9_generate_smi(); } tr->tco.rld = tr->tco.tmr; tco_timer_reload(tr); } /* NOTE: values of 0 or 1 will be ignored by ICH */ static inline int can_start_tco_timer(TCOIORegs *tr) { return !(tr->tco.cnt1 & TCO_TMR_HLT) && tr->tco.tmr > 1; } static uint32_t tco_ioport_readw(TCOIORegs *tr, uint32_t addr) { uint16_t rld; switch (addr) { case TCO_RLD: if (tr->expire_time != -1) { int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); int64_t elapsed = (tr->expire_time - now) / TCO_TICK_NSEC; rld = (uint16_t)elapsed | (tr->tco.rld & ~TCO_RLD_MASK); } else { rld = tr->tco.rld; } return rld; case TCO_DAT_IN: return tr->tco.din; case TCO_DAT_OUT: return tr->tco.dout; case TCO1_STS: return tr->tco.sts1; case TCO2_STS: return tr->tco.sts2; case TCO1_CNT: return tr->tco.cnt1; case TCO2_CNT: return tr->tco.cnt2; case TCO_MESSAGE1: return tr->tco.msg1; case TCO_MESSAGE2: return tr->tco.msg2; case TCO_WDCNT: return tr->tco.wdcnt; case TCO_TMR: return tr->tco.tmr; case SW_IRQ_GEN: return tr->sw_irq_gen; } return 0; } static void tco_ioport_writew(TCOIORegs *tr, uint32_t addr, uint32_t val) { switch (addr) { case TCO_RLD: tr->timeouts_no = 0; if (can_start_tco_timer(tr)) { tr->tco.rld = tr->tco.tmr; tco_timer_reload(tr); } else { tr->tco.rld = val; } break; case TCO_DAT_IN: tr->tco.din = val; tr->tco.sts1 |= SW_TCO_SMI; ich9_generate_smi(); break; case TCO_DAT_OUT: tr->tco.dout = val; tr->tco.sts1 |= TCO_INT_STS; /* TODO: cause an interrupt, as selected by the TCO_INT_SEL bits */ break; case TCO1_STS: tr->tco.sts1 = val & TCO1_STS_MASK; break; case TCO2_STS: tr->tco.sts2 = val & TCO2_STS_MASK; break; case TCO1_CNT: val &= TCO1_CNT_MASK; /* * once TCO_LOCK bit is set, it can not be cleared by software. a reset * is required to change this bit from 1 to 0 -- it defaults to 0. */ tr->tco.cnt1 = val | (tr->tco.cnt1 & TCO_LOCK); if (can_start_tco_timer(tr)) { tr->tco.rld = tr->tco.tmr; tco_timer_reload(tr); } else { tco_timer_stop(tr); } break; case TCO2_CNT: tr->tco.cnt2 = val; break; case TCO_MESSAGE1: tr->tco.msg1 = val; break; case TCO_MESSAGE2: tr->tco.msg2 = val; break; case TCO_WDCNT: tr->tco.wdcnt = val; break; case TCO_TMR: tr->tco.tmr = val; break; case SW_IRQ_GEN: tr->sw_irq_gen = val; break; } } static uint64_t tco_io_readw(void *opaque, hwaddr addr, unsigned width) { TCOIORegs *tr = opaque; return tco_ioport_readw(tr, addr); } static void tco_io_writew(void *opaque, hwaddr addr, uint64_t val, unsigned width) { TCOIORegs *tr = opaque; tco_ioport_writew(tr, addr, val); } static const MemoryRegionOps tco_io_ops = { .read = tco_io_readw, .write = tco_io_writew, .valid.min_access_size = 1, .valid.max_access_size = 4, .impl.min_access_size = 1, .impl.max_access_size = 2, .endianness = DEVICE_LITTLE_ENDIAN, }; void acpi_pm_tco_init(TCOIORegs *tr, MemoryRegion *parent) { *tr = (TCOIORegs) { .tco = { .rld = TCO_RLD_DEFAULT, .din = TCO_DAT_IN_DEFAULT, .dout = TCO_DAT_OUT_DEFAULT, .sts1 = TCO1_STS_DEFAULT, .sts2 = TCO2_STS_DEFAULT, .cnt1 = TCO1_CNT_DEFAULT, .cnt2 = TCO2_CNT_DEFAULT, .msg1 = TCO_MESSAGE1_DEFAULT, .msg2 = TCO_MESSAGE2_DEFAULT, .wdcnt = TCO_WDCNT_DEFAULT, .tmr = TCO_TMR_DEFAULT, }, .sw_irq_gen = SW_IRQ_GEN_DEFAULT, .tco_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, tco_timer_expired, tr), .expire_time = -1, .timeouts_no = 0, }; memory_region_init_io(&tr->io, memory_region_owner(parent), &tco_io_ops, tr, "sm-tco", ICH9_PMIO_TCO_LEN); memory_region_add_subregion(parent, ICH9_PMIO_TCO_RLD, &tr->io); } const VMStateDescription vmstate_tco_io_sts = { .name = "tco io device status", .version_id = 1, .minimum_version_id = 1, .minimum_version_id_old = 1, .fields = (VMStateField[]) { VMSTATE_UINT16(tco.rld, TCOIORegs), VMSTATE_UINT8(tco.din, TCOIORegs), VMSTATE_UINT8(tco.dout, TCOIORegs), VMSTATE_UINT16(tco.sts1, TCOIORegs), VMSTATE_UINT16(tco.sts2, TCOIORegs), VMSTATE_UINT16(tco.cnt1, TCOIORegs), VMSTATE_UINT16(tco.cnt2, TCOIORegs), VMSTATE_UINT8(tco.msg1, TCOIORegs), VMSTATE_UINT8(tco.msg2, TCOIORegs), VMSTATE_UINT8(tco.wdcnt, TCOIORegs), VMSTATE_UINT16(tco.tmr, TCOIORegs), VMSTATE_UINT8(sw_irq_gen, TCOIORegs), VMSTATE_TIMER_PTR(tco_timer, TCOIORegs), VMSTATE_INT64(expire_time, TCOIORegs), VMSTATE_UINT8(timeouts_no, TCOIORegs), VMSTATE_END_OF_LIST() } };