diff options
Diffstat (limited to 'qemu/hw/watchdog')
| -rw-r--r-- | qemu/hw/watchdog/Makefile.objs | 4 | ||||
| -rw-r--r-- | qemu/hw/watchdog/watchdog.c | 152 | ||||
| -rw-r--r-- | qemu/hw/watchdog/wdt_diag288.c | 130 | ||||
| -rw-r--r-- | qemu/hw/watchdog/wdt_i6300esb.c | 470 | ||||
| -rw-r--r-- | qemu/hw/watchdog/wdt_ib700.c | 156 |
5 files changed, 912 insertions, 0 deletions
diff --git a/qemu/hw/watchdog/Makefile.objs b/qemu/hw/watchdog/Makefile.objs new file mode 100644 index 000000000..72e3ffd93 --- /dev/null +++ b/qemu/hw/watchdog/Makefile.objs @@ -0,0 +1,4 @@ +common-obj-y += watchdog.o +common-obj-$(CONFIG_WDT_IB6300ESB) += wdt_i6300esb.o +common-obj-$(CONFIG_WDT_IB700) += wdt_ib700.o +common-obj-$(CONFIG_WDT_DIAG288) += wdt_diag288.o diff --git a/qemu/hw/watchdog/watchdog.c b/qemu/hw/watchdog/watchdog.c new file mode 100644 index 000000000..8d4b0eeeb --- /dev/null +++ b/qemu/hw/watchdog/watchdog.c @@ -0,0 +1,152 @@ +/* + * Virtual hardware watchdog. + * + * Copyright (C) 2009 Red Hat Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + * By Richard W.M. Jones (rjones@redhat.com). + */ + +#include "qemu-common.h" +#include "qemu/option.h" +#include "qemu/config-file.h" +#include "qemu/queue.h" +#include "qapi/qmp/types.h" +#include "sysemu/sysemu.h" +#include "sysemu/watchdog.h" +#include "qapi-event.h" +#include "hw/nmi.h" + +/* Possible values for action parameter. */ +#define WDT_RESET 1 /* Hard reset. */ +#define WDT_SHUTDOWN 2 /* Shutdown. */ +#define WDT_POWEROFF 3 /* Quit. */ +#define WDT_PAUSE 4 /* Pause. */ +#define WDT_DEBUG 5 /* Prints a message and continues running. */ +#define WDT_NONE 6 /* Do nothing. */ +#define WDT_NMI 7 /* Inject nmi into the guest */ + +static int watchdog_action = WDT_RESET; +static QLIST_HEAD(watchdog_list, WatchdogTimerModel) watchdog_list; + +void watchdog_add_model(WatchdogTimerModel *model) +{ + QLIST_INSERT_HEAD(&watchdog_list, model, entry); +} + +/* Returns: + * 0 = continue + * 1 = exit program with error + * 2 = exit program without error + */ +int select_watchdog(const char *p) +{ + WatchdogTimerModel *model; + QemuOpts *opts; + + /* -watchdog ? lists available devices and exits cleanly. */ + if (is_help_option(p)) { + QLIST_FOREACH(model, &watchdog_list, entry) { + fprintf(stderr, "\t%s\t%s\n", + model->wdt_name, model->wdt_description); + } + return 2; + } + + QLIST_FOREACH(model, &watchdog_list, entry) { + if (strcasecmp(model->wdt_name, p) == 0) { + /* add the device */ + opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0, + &error_abort); + qemu_opt_set(opts, "driver", p, &error_abort); + return 0; + } + } + + fprintf(stderr, "Unknown -watchdog device. Supported devices are:\n"); + QLIST_FOREACH(model, &watchdog_list, entry) { + fprintf(stderr, "\t%s\t%s\n", + model->wdt_name, model->wdt_description); + } + return 1; +} + +int select_watchdog_action(const char *p) +{ + if (strcasecmp(p, "reset") == 0) + watchdog_action = WDT_RESET; + else if (strcasecmp(p, "shutdown") == 0) + watchdog_action = WDT_SHUTDOWN; + else if (strcasecmp(p, "poweroff") == 0) + watchdog_action = WDT_POWEROFF; + else if (strcasecmp(p, "pause") == 0) + watchdog_action = WDT_PAUSE; + else if (strcasecmp(p, "debug") == 0) + watchdog_action = WDT_DEBUG; + else if (strcasecmp(p, "none") == 0) + watchdog_action = WDT_NONE; + else if (strcasecmp(p, "inject-nmi") == 0) + watchdog_action = WDT_NMI; + else + return -1; + + return 0; +} + +/* This actually performs the "action" once a watchdog has expired, + * ie. reboot, shutdown, exit, etc. + */ +void watchdog_perform_action(void) +{ + switch (watchdog_action) { + case WDT_RESET: /* same as 'system_reset' in monitor */ + qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_RESET, &error_abort); + qemu_system_reset_request(); + break; + + case WDT_SHUTDOWN: /* same as 'system_powerdown' in monitor */ + qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_SHUTDOWN, &error_abort); + qemu_system_powerdown_request(); + break; + + case WDT_POWEROFF: /* same as 'quit' command in monitor */ + qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_POWEROFF, &error_abort); + exit(0); + + case WDT_PAUSE: /* same as 'stop' command in monitor */ + /* In a timer callback, when vm_stop calls qemu_clock_enable + * you would get a deadlock. Bypass the problem. + */ + qemu_system_vmstop_request_prepare(); + qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_PAUSE, &error_abort); + qemu_system_vmstop_request(RUN_STATE_WATCHDOG); + break; + + case WDT_DEBUG: + qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_DEBUG, &error_abort); + fprintf(stderr, "watchdog: timer fired\n"); + break; + + case WDT_NONE: + qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_NONE, &error_abort); + break; + + case WDT_NMI: + qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_INJECT_NMI, + &error_abort); + inject_nmi(); + break; + } +} diff --git a/qemu/hw/watchdog/wdt_diag288.c b/qemu/hw/watchdog/wdt_diag288.c new file mode 100644 index 000000000..2a885a447 --- /dev/null +++ b/qemu/hw/watchdog/wdt_diag288.c @@ -0,0 +1,130 @@ +/* + * watchdog device diag288 support + * + * Copyright IBM, Corp. 2015 + * + * Authors: + * Xu Wang <gesaint@linux.vnet.ibm.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or (at your + * option) any later version. See the COPYING file in the top-level directory. + * + */ + +#include "sysemu/watchdog.h" +#include "hw/sysbus.h" +#include "qemu/timer.h" +#include "hw/watchdog/wdt_diag288.h" + +static WatchdogTimerModel model = { + .wdt_name = TYPE_WDT_DIAG288, + .wdt_description = "diag288 device for s390x platform", +}; + +static const VMStateDescription vmstate_diag288 = { + .name = "vmstate_diag288", + .version_id = 0, + .minimum_version_id = 0, + .fields = (VMStateField[]) { + VMSTATE_TIMER_PTR(timer, DIAG288State), + VMSTATE_BOOL(enabled, DIAG288State), + VMSTATE_END_OF_LIST() + } +}; + +static void wdt_diag288_reset(DeviceState *dev) +{ + DIAG288State *diag288 = DIAG288(dev); + + diag288->enabled = false; + timer_del(diag288->timer); +} + +static void diag288_reset(void *opaque) +{ + DeviceState *diag288 = opaque; + + wdt_diag288_reset(diag288); +} + +static void diag288_timer_expired(void *dev) +{ + qemu_log_mask(CPU_LOG_RESET, "Watchdog timer expired.\n"); + watchdog_perform_action(); + wdt_diag288_reset(dev); +} + +static int wdt_diag288_handle_timer(DIAG288State *diag288, + uint64_t func, uint64_t timeout) +{ + switch (func) { + case WDT_DIAG288_INIT: + diag288->enabled = true; + /* fall through */ + case WDT_DIAG288_CHANGE: + if (!diag288->enabled) { + return -1; + } + timer_mod(diag288->timer, + qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + + timeout * get_ticks_per_sec()); + break; + case WDT_DIAG288_CANCEL: + if (!diag288->enabled) { + return -1; + } + diag288->enabled = false; + timer_del(diag288->timer); + break; + default: + return -1; + } + + return 0; +} + +static void wdt_diag288_realize(DeviceState *dev, Error **errp) +{ + DIAG288State *diag288 = DIAG288(dev); + + qemu_register_reset(diag288_reset, diag288); + diag288->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, diag288_timer_expired, + dev); +} + +static void wdt_diag288_unrealize(DeviceState *dev, Error **errp) +{ + DIAG288State *diag288 = DIAG288(dev); + + timer_del(diag288->timer); + timer_free(diag288->timer); +} + +static void wdt_diag288_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + DIAG288Class *diag288 = DIAG288_CLASS(klass); + + dc->realize = wdt_diag288_realize; + dc->unrealize = wdt_diag288_unrealize; + dc->reset = wdt_diag288_reset; + set_bit(DEVICE_CATEGORY_MISC, dc->categories); + dc->vmsd = &vmstate_diag288; + diag288->handle_timer = wdt_diag288_handle_timer; +} + +static const TypeInfo wdt_diag288_info = { + .class_init = wdt_diag288_class_init, + .parent = TYPE_DEVICE, + .name = TYPE_WDT_DIAG288, + .instance_size = sizeof(DIAG288State), + .class_size = sizeof(DIAG288Class), +}; + +static void wdt_diag288_register_types(void) +{ + watchdog_add_model(&model); + type_register_static(&wdt_diag288_info); +} + +type_init(wdt_diag288_register_types) diff --git a/qemu/hw/watchdog/wdt_i6300esb.c b/qemu/hw/watchdog/wdt_i6300esb.c new file mode 100644 index 000000000..cfa2b1be1 --- /dev/null +++ b/qemu/hw/watchdog/wdt_i6300esb.c @@ -0,0 +1,470 @@ +/* + * Virtual hardware watchdog. + * + * Copyright (C) 2009 Red Hat Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + * By Richard W.M. Jones (rjones@redhat.com). + */ + +#include <inttypes.h> + +#include "qemu-common.h" +#include "qemu/timer.h" +#include "sysemu/watchdog.h" +#include "hw/hw.h" +#include "hw/pci/pci.h" + +/*#define I6300ESB_DEBUG 1*/ + +#ifdef I6300ESB_DEBUG +#define i6300esb_debug(fs,...) \ + fprintf(stderr,"i6300esb: %s: "fs,__func__,##__VA_ARGS__) +#else +#define i6300esb_debug(fs,...) +#endif + +/* PCI configuration registers */ +#define ESB_CONFIG_REG 0x60 /* Config register */ +#define ESB_LOCK_REG 0x68 /* WDT lock register */ + +/* Memory mapped registers (offset from base address) */ +#define ESB_TIMER1_REG 0x00 /* Timer1 value after each reset */ +#define ESB_TIMER2_REG 0x04 /* Timer2 value after each reset */ +#define ESB_GINTSR_REG 0x08 /* General Interrupt Status Register */ +#define ESB_RELOAD_REG 0x0c /* Reload register */ + +/* Lock register bits */ +#define ESB_WDT_FUNC (0x01 << 2) /* Watchdog functionality */ +#define ESB_WDT_ENABLE (0x01 << 1) /* Enable WDT */ +#define ESB_WDT_LOCK (0x01 << 0) /* Lock (nowayout) */ + +/* Config register bits */ +#define ESB_WDT_REBOOT (0x01 << 5) /* Enable reboot on timeout */ +#define ESB_WDT_FREQ (0x01 << 2) /* Decrement frequency */ +#define ESB_WDT_INTTYPE (0x11 << 0) /* Interrupt type on timer1 timeout */ + +/* Reload register bits */ +#define ESB_WDT_RELOAD (0x01 << 8) /* prevent timeout */ + +/* Magic constants */ +#define ESB_UNLOCK1 0x80 /* Step 1 to unlock reset registers */ +#define ESB_UNLOCK2 0x86 /* Step 2 to unlock reset registers */ + +/* Device state. */ +struct I6300State { + PCIDevice dev; + MemoryRegion io_mem; + + int reboot_enabled; /* "Reboot" on timer expiry. The real action + * performed depends on the -watchdog-action + * param passed on QEMU command line. + */ + int clock_scale; /* Clock scale. */ +#define CLOCK_SCALE_1KHZ 0 +#define CLOCK_SCALE_1MHZ 1 + + int int_type; /* Interrupt type generated. */ +#define INT_TYPE_IRQ 0 /* APIC 1, INT 10 */ +#define INT_TYPE_SMI 2 +#define INT_TYPE_DISABLED 3 + + int free_run; /* If true, reload timer on expiry. */ + int locked; /* If true, enabled field cannot be changed. */ + int enabled; /* If true, watchdog is enabled. */ + + QEMUTimer *timer; /* The actual watchdog timer. */ + + uint32_t timer1_preload; /* Values preloaded into timer1, timer2. */ + uint32_t timer2_preload; + int stage; /* Stage (1 or 2). */ + + int unlock_state; /* Guest writes 0x80, 0x86 to unlock the + * registers, and we transition through + * states 0 -> 1 -> 2 when this happens. + */ + + int previous_reboot_flag; /* If the watchdog caused the previous + * reboot, this flag will be set. + */ +}; + +typedef struct I6300State I6300State; + +#define TYPE_WATCHDOG_I6300ESB_DEVICE "i6300esb" +#define WATCHDOG_I6300ESB_DEVICE(obj) \ + OBJECT_CHECK(I6300State, (obj), TYPE_WATCHDOG_I6300ESB_DEVICE) + +/* This function is called when the watchdog has either been enabled + * (hence it starts counting down) or has been keep-alived. + */ +static void i6300esb_restart_timer(I6300State *d, int stage) +{ + int64_t timeout; + + if (!d->enabled) + return; + + d->stage = stage; + + if (d->stage <= 1) + timeout = d->timer1_preload; + else + timeout = d->timer2_preload; + + if (d->clock_scale == CLOCK_SCALE_1KHZ) + timeout <<= 15; + else + timeout <<= 5; + + /* Get the timeout in units of ticks_per_sec. + * + * ticks_per_sec is typically 10^9 == 0x3B9ACA00 (30 bits), with + * 20 bits of user supplied preload, and 15 bits of scale, the + * multiply here can exceed 64-bits, before we divide by 33MHz, so + * we use a higher-precision intermediate result. + */ + timeout = muldiv64(get_ticks_per_sec(), timeout, 33000000); + + i6300esb_debug("stage %d, timeout %" PRIi64 "\n", d->stage, timeout); + + timer_mod(d->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + timeout); +} + +/* This is called when the guest disables the watchdog. */ +static void i6300esb_disable_timer(I6300State *d) +{ + i6300esb_debug("timer disabled\n"); + + timer_del(d->timer); +} + +static void i6300esb_reset(DeviceState *dev) +{ + PCIDevice *pdev = PCI_DEVICE(dev); + I6300State *d = WATCHDOG_I6300ESB_DEVICE(pdev); + + i6300esb_debug("I6300State = %p\n", d); + + i6300esb_disable_timer(d); + + /* NB: Don't change d->previous_reboot_flag in this function. */ + + d->reboot_enabled = 1; + d->clock_scale = CLOCK_SCALE_1KHZ; + d->int_type = INT_TYPE_IRQ; + d->free_run = 0; + d->locked = 0; + d->enabled = 0; + d->timer1_preload = 0xfffff; + d->timer2_preload = 0xfffff; + d->stage = 1; + d->unlock_state = 0; +} + +/* This function is called when the watchdog expires. Note that + * the hardware has two timers, and so expiry happens in two stages. + * If d->stage == 1 then we perform the first stage action (usually, + * sending an interrupt) and then restart the timer again for the + * second stage. If the second stage expires then the watchdog + * really has run out. + */ +static void i6300esb_timer_expired(void *vp) +{ + I6300State *d = vp; + + i6300esb_debug("stage %d\n", d->stage); + + if (d->stage == 1) { + /* What to do at the end of stage 1? */ + switch (d->int_type) { + case INT_TYPE_IRQ: + fprintf(stderr, "i6300esb_timer_expired: I would send APIC 1 INT 10 here if I knew how (XXX)\n"); + break; + case INT_TYPE_SMI: + fprintf(stderr, "i6300esb_timer_expired: I would send SMI here if I knew how (XXX)\n"); + break; + } + + /* Start the second stage. */ + i6300esb_restart_timer(d, 2); + } else { + /* Second stage expired, reboot for real. */ + if (d->reboot_enabled) { + d->previous_reboot_flag = 1; + watchdog_perform_action(); /* This reboots, exits, etc */ + i6300esb_reset(&d->dev.qdev); + } + + /* In "free running mode" we start stage 1 again. */ + if (d->free_run) + i6300esb_restart_timer(d, 1); + } +} + +static void i6300esb_config_write(PCIDevice *dev, uint32_t addr, + uint32_t data, int len) +{ + I6300State *d = WATCHDOG_I6300ESB_DEVICE(dev); + int old; + + i6300esb_debug("addr = %x, data = %x, len = %d\n", addr, data, len); + + if (addr == ESB_CONFIG_REG && len == 2) { + d->reboot_enabled = (data & ESB_WDT_REBOOT) == 0; + d->clock_scale = + (data & ESB_WDT_FREQ) != 0 ? CLOCK_SCALE_1MHZ : CLOCK_SCALE_1KHZ; + d->int_type = (data & ESB_WDT_INTTYPE); + } else if (addr == ESB_LOCK_REG && len == 1) { + if (!d->locked) { + d->locked = (data & ESB_WDT_LOCK) != 0; + d->free_run = (data & ESB_WDT_FUNC) != 0; + old = d->enabled; + d->enabled = (data & ESB_WDT_ENABLE) != 0; + if (!old && d->enabled) /* Enabled transitioned from 0 -> 1 */ + i6300esb_restart_timer(d, 1); + else if (!d->enabled) + i6300esb_disable_timer(d); + } + } else { + pci_default_write_config(dev, addr, data, len); + } +} + +static uint32_t i6300esb_config_read(PCIDevice *dev, uint32_t addr, int len) +{ + I6300State *d = WATCHDOG_I6300ESB_DEVICE(dev); + uint32_t data; + + i6300esb_debug ("addr = %x, len = %d\n", addr, len); + + if (addr == ESB_CONFIG_REG && len == 2) { + data = + (d->reboot_enabled ? 0 : ESB_WDT_REBOOT) | + (d->clock_scale == CLOCK_SCALE_1MHZ ? ESB_WDT_FREQ : 0) | + d->int_type; + return data; + } else if (addr == ESB_LOCK_REG && len == 1) { + data = + (d->free_run ? ESB_WDT_FUNC : 0) | + (d->locked ? ESB_WDT_LOCK : 0) | + (d->enabled ? ESB_WDT_ENABLE : 0); + return data; + } else { + return pci_default_read_config(dev, addr, len); + } +} + +static uint32_t i6300esb_mem_readb(void *vp, hwaddr addr) +{ + i6300esb_debug ("addr = %x\n", (int) addr); + + return 0; +} + +static uint32_t i6300esb_mem_readw(void *vp, hwaddr addr) +{ + uint32_t data = 0; + I6300State *d = vp; + + i6300esb_debug("addr = %x\n", (int) addr); + + if (addr == 0xc) { + /* The previous reboot flag is really bit 9, but there is + * a bug in the Linux driver where it thinks it's bit 12. + * Set both. + */ + data = d->previous_reboot_flag ? 0x1200 : 0; + } + + return data; +} + +static uint32_t i6300esb_mem_readl(void *vp, hwaddr addr) +{ + i6300esb_debug("addr = %x\n", (int) addr); + + return 0; +} + +static void i6300esb_mem_writeb(void *vp, hwaddr addr, uint32_t val) +{ + I6300State *d = vp; + + i6300esb_debug("addr = %x, val = %x\n", (int) addr, val); + + if (addr == 0xc && val == 0x80) + d->unlock_state = 1; + else if (addr == 0xc && val == 0x86 && d->unlock_state == 1) + d->unlock_state = 2; +} + +static void i6300esb_mem_writew(void *vp, hwaddr addr, uint32_t val) +{ + I6300State *d = vp; + + i6300esb_debug("addr = %x, val = %x\n", (int) addr, val); + + if (addr == 0xc && val == 0x80) + d->unlock_state = 1; + else if (addr == 0xc && val == 0x86 && d->unlock_state == 1) + d->unlock_state = 2; + else { + if (d->unlock_state == 2) { + if (addr == 0xc) { + if ((val & 0x100) != 0) + /* This is the "ping" from the userspace watchdog in + * the guest ... + */ + i6300esb_restart_timer(d, 1); + + /* Setting bit 9 resets the previous reboot flag. + * There's a bug in the Linux driver where it sets + * bit 12 instead. + */ + if ((val & 0x200) != 0 || (val & 0x1000) != 0) { + d->previous_reboot_flag = 0; + } + } + + d->unlock_state = 0; + } + } +} + +static void i6300esb_mem_writel(void *vp, hwaddr addr, uint32_t val) +{ + I6300State *d = vp; + + i6300esb_debug ("addr = %x, val = %x\n", (int) addr, val); + + if (addr == 0xc && val == 0x80) + d->unlock_state = 1; + else if (addr == 0xc && val == 0x86 && d->unlock_state == 1) + d->unlock_state = 2; + else { + if (d->unlock_state == 2) { + if (addr == 0) + d->timer1_preload = val & 0xfffff; + else if (addr == 4) + d->timer2_preload = val & 0xfffff; + + d->unlock_state = 0; + } + } +} + +static const MemoryRegionOps i6300esb_ops = { + .old_mmio = { + .read = { + i6300esb_mem_readb, + i6300esb_mem_readw, + i6300esb_mem_readl, + }, + .write = { + i6300esb_mem_writeb, + i6300esb_mem_writew, + i6300esb_mem_writel, + }, + }, + .endianness = DEVICE_LITTLE_ENDIAN, +}; + +static const VMStateDescription vmstate_i6300esb = { + .name = "i6300esb_wdt", + /* With this VMSD's introduction, version_id/minimum_version_id were + * erroneously set to sizeof(I6300State), causing a somewhat random + * version_id to be set for every build. This eventually broke + * migration. + * + * To correct this without breaking old->new migration for older + * versions of QEMU, we've set version_id to a value high enough + * to exceed all past values of sizeof(I6300State) across various + * build environments, and have reset minimum_version_id to 1, + * since this VMSD has never changed and thus can accept all past + * versions. + * + * For future changes we can treat these values as we normally would. + */ + .version_id = 10000, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_PCI_DEVICE(dev, I6300State), + VMSTATE_INT32(reboot_enabled, I6300State), + VMSTATE_INT32(clock_scale, I6300State), + VMSTATE_INT32(int_type, I6300State), + VMSTATE_INT32(free_run, I6300State), + VMSTATE_INT32(locked, I6300State), + VMSTATE_INT32(enabled, I6300State), + VMSTATE_TIMER_PTR(timer, I6300State), + VMSTATE_UINT32(timer1_preload, I6300State), + VMSTATE_UINT32(timer2_preload, I6300State), + VMSTATE_INT32(stage, I6300State), + VMSTATE_INT32(unlock_state, I6300State), + VMSTATE_INT32(previous_reboot_flag, I6300State), + VMSTATE_END_OF_LIST() + } +}; + +static void i6300esb_realize(PCIDevice *dev, Error **errp) +{ + I6300State *d = WATCHDOG_I6300ESB_DEVICE(dev); + + i6300esb_debug("I6300State = %p\n", d); + + d->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, i6300esb_timer_expired, d); + d->previous_reboot_flag = 0; + + memory_region_init_io(&d->io_mem, OBJECT(d), &i6300esb_ops, d, + "i6300esb", 0x10); + pci_register_bar(&d->dev, 0, 0, &d->io_mem); + /* qemu_register_coalesced_mmio (addr, 0x10); ? */ +} + +static WatchdogTimerModel model = { + .wdt_name = "i6300esb", + .wdt_description = "Intel 6300ESB", +}; + +static void i6300esb_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); + + k->config_read = i6300esb_config_read; + k->config_write = i6300esb_config_write; + k->realize = i6300esb_realize; + k->vendor_id = PCI_VENDOR_ID_INTEL; + k->device_id = PCI_DEVICE_ID_INTEL_ESB_9; + k->class_id = PCI_CLASS_SYSTEM_OTHER; + dc->reset = i6300esb_reset; + dc->vmsd = &vmstate_i6300esb; + set_bit(DEVICE_CATEGORY_MISC, dc->categories); +} + +static const TypeInfo i6300esb_info = { + .name = TYPE_WATCHDOG_I6300ESB_DEVICE, + .parent = TYPE_PCI_DEVICE, + .instance_size = sizeof(I6300State), + .class_init = i6300esb_class_init, +}; + +static void i6300esb_register_types(void) +{ + watchdog_add_model(&model); + type_register_static(&i6300esb_info); +} + +type_init(i6300esb_register_types) diff --git a/qemu/hw/watchdog/wdt_ib700.c b/qemu/hw/watchdog/wdt_ib700.c new file mode 100644 index 000000000..0917a713d --- /dev/null +++ b/qemu/hw/watchdog/wdt_ib700.c @@ -0,0 +1,156 @@ +/* + * Virtual hardware watchdog. + * + * Copyright (C) 2009 Red Hat Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + * By Richard W.M. Jones (rjones@redhat.com). + */ + +#include "qemu-common.h" +#include "qemu/timer.h" +#include "sysemu/watchdog.h" +#include "hw/hw.h" +#include "hw/isa/isa.h" +#include "hw/i386/pc.h" + +/*#define IB700_DEBUG 1*/ + +#ifdef IB700_DEBUG +#define ib700_debug(fs,...) \ + fprintf(stderr,"ib700: %s: "fs,__func__,##__VA_ARGS__) +#else +#define ib700_debug(fs,...) +#endif + +#define TYPE_IB700 "ib700" +#define IB700(obj) OBJECT_CHECK(IB700State, (obj), TYPE_IB700) + +typedef struct IB700state { + ISADevice parent_obj; + + QEMUTimer *timer; + + PortioList port_list; +} IB700State; + +/* This is the timer. We use a global here because the watchdog + * code ensures there is only one watchdog (it is located at a fixed, + * unchangeable IO port, so there could only ever be one anyway). + */ + +/* A write to this register enables the timer. */ +static void ib700_write_enable_reg(void *vp, uint32_t addr, uint32_t data) +{ + IB700State *s = vp; + static int time_map[] = { + 30, 28, 26, 24, 22, 20, 18, 16, + 14, 12, 10, 8, 6, 4, 2, 0 + }; + int64_t timeout; + + ib700_debug("addr = %x, data = %x\n", addr, data); + + timeout = (int64_t) time_map[data & 0xF] * get_ticks_per_sec(); + timer_mod(s->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + timeout); +} + +/* A write (of any value) to this register disables the timer. */ +static void ib700_write_disable_reg(void *vp, uint32_t addr, uint32_t data) +{ + IB700State *s = vp; + + ib700_debug("addr = %x, data = %x\n", addr, data); + + timer_del(s->timer); +} + +/* This is called when the watchdog expires. */ +static void ib700_timer_expired(void *vp) +{ + IB700State *s = vp; + + ib700_debug("watchdog expired\n"); + + watchdog_perform_action(); + timer_del(s->timer); +} + +static const VMStateDescription vmstate_ib700 = { + .name = "ib700_wdt", + .version_id = 0, + .minimum_version_id = 0, + .fields = (VMStateField[]) { + VMSTATE_TIMER_PTR(timer, IB700State), + VMSTATE_END_OF_LIST() + } +}; + +static const MemoryRegionPortio wdt_portio_list[] = { + { 0x441, 2, 1, .write = ib700_write_disable_reg, }, + { 0x443, 2, 1, .write = ib700_write_enable_reg, }, + PORTIO_END_OF_LIST(), +}; + +static void wdt_ib700_realize(DeviceState *dev, Error **errp) +{ + IB700State *s = IB700(dev); + + ib700_debug("watchdog init\n"); + + s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, ib700_timer_expired, s); + + portio_list_init(&s->port_list, OBJECT(s), wdt_portio_list, s, "ib700"); + portio_list_add(&s->port_list, isa_address_space_io(&s->parent_obj), 0); +} + +static void wdt_ib700_reset(DeviceState *dev) +{ + IB700State *s = IB700(dev); + + ib700_debug("watchdog reset\n"); + + timer_del(s->timer); +} + +static WatchdogTimerModel model = { + .wdt_name = "ib700", + .wdt_description = "iBASE 700", +}; + +static void wdt_ib700_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = wdt_ib700_realize; + dc->reset = wdt_ib700_reset; + dc->vmsd = &vmstate_ib700; + set_bit(DEVICE_CATEGORY_MISC, dc->categories); +} + +static const TypeInfo wdt_ib700_info = { + .name = TYPE_IB700, + .parent = TYPE_ISA_DEVICE, + .instance_size = sizeof(IB700State), + .class_init = wdt_ib700_class_init, +}; + +static void wdt_ib700_register_types(void) +{ + watchdog_add_model(&model); + type_register_static(&wdt_ib700_info); +} + +type_init(wdt_ib700_register_types) |