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Diffstat (limited to 'src/VBox/Runtime/r0drv/freebsd/timer-r0drv-freebsd.c')
-rw-r--r--src/VBox/Runtime/r0drv/freebsd/timer-r0drv-freebsd.c286
1 files changed, 286 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r0drv/freebsd/timer-r0drv-freebsd.c b/src/VBox/Runtime/r0drv/freebsd/timer-r0drv-freebsd.c
new file mode 100644
index 00000000..0dbca47a
--- /dev/null
+++ b/src/VBox/Runtime/r0drv/freebsd/timer-r0drv-freebsd.c
@@ -0,0 +1,286 @@
+/* $Id: timer-r0drv-freebsd.c $ */
+/** @file
+ * IPRT - Memory Allocation, Ring-0 Driver, FreeBSD.
+ */
+
+/*
+ * Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*********************************************************************************************************************************
+* Header Files *
+*********************************************************************************************************************************/
+#include "the-freebsd-kernel.h"
+
+#include <iprt/timer.h>
+#include <iprt/time.h>
+#include <iprt/spinlock.h>
+#include <iprt/err.h>
+#include <iprt/asm.h>
+#include <iprt/assert.h>
+#include <iprt/alloc.h>
+
+#include "internal/magics.h"
+
+
+/*********************************************************************************************************************************
+* Structures and Typedefs *
+*********************************************************************************************************************************/
+/**
+ * The internal representation of an FreeBSD timer handle.
+ */
+typedef struct RTTIMER
+{
+ /** Magic.
+ * This is RTTIMER_MAGIC, but changes to something else before the timer
+ * is destroyed to indicate clearly that thread should exit. */
+ uint32_t volatile u32Magic;
+ /** Flag indicating that the timer is suspended. */
+ uint8_t volatile fSuspended;
+ /** Whether the timer must run on a specific CPU or not. */
+ uint8_t fSpecificCpu;
+ /** The CPU it must run on if fSpecificCpu is set. */
+ uint32_t iCpu;
+ /** The FreeBSD callout structure. */
+ struct callout Callout;
+ /** Callback. */
+ PFNRTTIMER pfnTimer;
+ /** User argument. */
+ void *pvUser;
+ /** The timer interval. 0 if one-shot. */
+ uint64_t u64NanoInterval;
+ /** The start of the current run.
+ * This is used to calculate when the timer ought to fire the next time. */
+ uint64_t volatile u64StartTS;
+ /** The start of the current run.
+ * This is used to calculate when the timer ought to fire the next time. */
+ uint64_t volatile u64NextTS;
+ /** The current tick number (since u64StartTS). */
+ uint64_t volatile iTick;
+} RTTIMER;
+
+
+/*********************************************************************************************************************************
+* Internal Functions *
+*********************************************************************************************************************************/
+static void rtTimerFreeBSDCallback(void *pvTimer);
+
+
+
+RTDECL(int) RTTimerCreateEx(PRTTIMER *ppTimer, uint64_t u64NanoInterval, uint32_t fFlags, PFNRTTIMER pfnTimer, void *pvUser)
+{
+ *ppTimer = NULL;
+
+ /*
+ * Validate flags.
+ */
+ if (!RTTIMER_FLAGS_ARE_VALID(fFlags))
+ return VERR_INVALID_PARAMETER;
+ if ( (fFlags & RTTIMER_FLAGS_CPU_SPECIFIC)
+ && (fFlags & RTTIMER_FLAGS_CPU_ALL) != RTTIMER_FLAGS_CPU_ALL
+ && (fFlags & RTTIMER_FLAGS_CPU_MASK) > mp_maxid)
+ return VERR_CPU_NOT_FOUND;
+
+ /*
+ * Allocate and initialize the timer handle.
+ */
+ PRTTIMER pTimer = (PRTTIMER)RTMemAlloc(sizeof(*pTimer));
+ if (!pTimer)
+ return VERR_NO_MEMORY;
+
+ pTimer->u32Magic = RTTIMER_MAGIC;
+ pTimer->fSuspended = true;
+ pTimer->fSpecificCpu = !!(fFlags & RTTIMER_FLAGS_CPU_SPECIFIC);
+ pTimer->iCpu = fFlags & RTTIMER_FLAGS_CPU_MASK;
+ pTimer->pfnTimer = pfnTimer;
+ pTimer->pvUser = pvUser;
+ pTimer->u64NanoInterval = u64NanoInterval;
+ pTimer->u64StartTS = 0;
+ callout_init(&pTimer->Callout, CALLOUT_MPSAFE);
+
+ *ppTimer = pTimer;
+ return VINF_SUCCESS;
+}
+
+
+/**
+ * Validates the timer handle.
+ *
+ * @returns true if valid, false if invalid.
+ * @param pTimer The handle.
+ */
+DECLINLINE(bool) rtTimerIsValid(PRTTIMER pTimer)
+{
+ AssertReturn(VALID_PTR(pTimer), false);
+ AssertReturn(pTimer->u32Magic == RTTIMER_MAGIC, false);
+ return true;
+}
+
+
+RTDECL(int) RTTimerDestroy(PRTTIMER pTimer)
+{
+ /* It's ok to pass NULL pointer. */
+ if (pTimer == /*NIL_RTTIMER*/ NULL)
+ return VINF_SUCCESS;
+ if (!rtTimerIsValid(pTimer))
+ return VERR_INVALID_HANDLE;
+
+ /*
+ * Free the associated resources.
+ */
+ pTimer->u32Magic++;
+ callout_stop(&pTimer->Callout);
+ RTMemFree(pTimer);
+ return VINF_SUCCESS;
+}
+
+
+RTDECL(int) RTTimerStart(PRTTIMER pTimer, uint64_t u64First)
+{
+ struct timeval tv;
+
+ if (!rtTimerIsValid(pTimer))
+ return VERR_INVALID_HANDLE;
+ if (!pTimer->fSuspended)
+ return VERR_TIMER_ACTIVE;
+ if ( pTimer->fSpecificCpu
+ && !RTMpIsCpuOnline(RTMpCpuIdFromSetIndex(pTimer->iCpu)))
+ return VERR_CPU_OFFLINE;
+
+ /*
+ * Calc when it should start firing.
+ */
+ u64First += RTTimeNanoTS();
+
+ pTimer->fSuspended = false;
+ pTimer->iTick = 0;
+ pTimer->u64StartTS = u64First;
+ pTimer->u64NextTS = u64First;
+
+ tv.tv_sec = u64First / 1000000000;
+ tv.tv_usec = (u64First % 1000000000) / 1000;
+ callout_reset(&pTimer->Callout, tvtohz(&tv), rtTimerFreeBSDCallback, pTimer);
+
+ return VINF_SUCCESS;
+}
+
+
+RTDECL(int) RTTimerStop(PRTTIMER pTimer)
+{
+ if (!rtTimerIsValid(pTimer))
+ return VERR_INVALID_HANDLE;
+ if (pTimer->fSuspended)
+ return VERR_TIMER_SUSPENDED;
+
+ /*
+ * Suspend the timer.
+ */
+ pTimer->fSuspended = true;
+ callout_stop(&pTimer->Callout);
+
+ return VINF_SUCCESS;
+}
+
+
+RTDECL(int) RTTimerChangeInterval(PRTTIMER pTimer, uint64_t u64NanoInterval)
+{
+ if (!rtTimerIsValid(pTimer))
+ return VERR_INVALID_HANDLE;
+ return VERR_NOT_SUPPORTED;
+}
+
+
+/**
+ * smp_rendezvous action callback.
+ *
+ * This will perform the timer callback if we're on the right CPU.
+ *
+ * @param pvTimer The timer.
+ */
+static void rtTimerFreeBSDIpiAction(void *pvTimer)
+{
+ PRTTIMER pTimer = (PRTTIMER)pvTimer;
+ if ( pTimer->iCpu == RTTIMER_FLAGS_CPU_MASK
+ || (u_int)pTimer->iCpu == curcpu)
+ pTimer->pfnTimer(pTimer, pTimer->pvUser, pTimer->iTick);
+}
+
+
+static void rtTimerFreeBSDCallback(void *pvTimer)
+{
+ PRTTIMER pTimer = (PRTTIMER)pvTimer;
+
+ /* calculate and set the next timeout */
+ pTimer->iTick++;
+ if (!pTimer->u64NanoInterval)
+ {
+ pTimer->fSuspended = true;
+ callout_stop(&pTimer->Callout);
+ }
+ else
+ {
+ struct timeval tv;
+ const uint64_t u64NanoTS = RTTimeNanoTS();
+ pTimer->u64NextTS = pTimer->u64StartTS + pTimer->iTick * pTimer->u64NanoInterval;
+ if (pTimer->u64NextTS < u64NanoTS)
+ pTimer->u64NextTS = u64NanoTS + RTTimerGetSystemGranularity() / 2;
+
+ tv.tv_sec = pTimer->u64NextTS / 1000000000;
+ tv.tv_usec = (pTimer->u64NextTS % 1000000000) / 1000;
+ callout_reset(&pTimer->Callout, tvtohz(&tv), rtTimerFreeBSDCallback, pTimer);
+ }
+
+ /* callback */
+ if ( !pTimer->fSpecificCpu
+ || pTimer->iCpu == curcpu)
+ pTimer->pfnTimer(pTimer, pTimer->pvUser, pTimer->iTick);
+ else
+ smp_rendezvous(NULL, rtTimerFreeBSDIpiAction, NULL, pvTimer);
+}
+
+
+RTDECL(uint32_t) RTTimerGetSystemGranularity(void)
+{
+ return 1000000000 / hz; /* ns */
+}
+
+
+RTDECL(int) RTTimerRequestSystemGranularity(uint32_t u32Request, uint32_t *pu32Granted)
+{
+ return VERR_NOT_SUPPORTED;
+}
+
+
+RTDECL(int) RTTimerReleaseSystemGranularity(uint32_t u32Granted)
+{
+ return VERR_NOT_SUPPORTED;
+}
+
+
+RTDECL(bool) RTTimerCanDoHighResolution(void)
+{
+ return false;
+}
+
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