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-rw-r--r--hw/wdt_i6300esb.c455
1 files changed, 0 insertions, 455 deletions
diff --git a/hw/wdt_i6300esb.c b/hw/wdt_i6300esb.c
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index f13e507fcf..0000000000
--- a/hw/wdt_i6300esb.c
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@@ -1,455 +0,0 @@
-/*
- * 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 "hw/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;
-
-/* 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. */
- timeout = get_ticks_per_sec() * timeout / 33000000;
-
- i6300esb_debug("stage %d, timeout %" PRIi64 "\n", d->stage, timeout);
-
- qemu_mod_timer(d->timer, qemu_get_clock_ns(vm_clock) + timeout);
-}
-
-/* This is called when the guest disables the watchdog. */
-static void i6300esb_disable_timer(I6300State *d)
-{
- i6300esb_debug("timer disabled\n");
-
- qemu_del_timer(d->timer);
-}
-
-static void i6300esb_reset(DeviceState *dev)
-{
- PCIDevice *pdev = PCI_DEVICE(dev);
- I6300State *d = DO_UPCAST(I6300State, dev, 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 = DO_UPCAST(I6300State, dev, 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 = DO_UPCAST(I6300State, dev, 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_NATIVE_ENDIAN,
-};
-
-static const VMStateDescription vmstate_i6300esb = {
- .name = "i6300esb_wdt",
- .version_id = sizeof(I6300State),
- .minimum_version_id = sizeof(I6300State),
- .minimum_version_id_old = sizeof(I6300State),
- .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(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 int i6300esb_init(PCIDevice *dev)
-{
- I6300State *d = DO_UPCAST(I6300State, dev, dev);
-
- i6300esb_debug("I6300State = %p\n", d);
-
- d->timer = qemu_new_timer_ns(vm_clock, i6300esb_timer_expired, d);
- d->previous_reboot_flag = 0;
-
- memory_region_init_io(&d->io_mem, &i6300esb_ops, d, "i6300esb", 0x10);
- pci_register_bar(&d->dev, 0, 0, &d->io_mem);
- /* qemu_register_coalesced_mmio (addr, 0x10); ? */
-
- return 0;
-}
-
-static void i6300esb_exit(PCIDevice *dev)
-{
- I6300State *d = DO_UPCAST(I6300State, dev, dev);
-
- memory_region_destroy(&d->io_mem);
-}
-
-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->init = i6300esb_init;
- k->exit = i6300esb_exit;
- 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;
-}
-
-static const TypeInfo i6300esb_info = {
- .name = "i6300esb",
- .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)