xnu-2050.22.13.tar.gz

[apple/xnu.git] / osfmk / i386 / pmCPU.c

diff --git a/osfmk/i386/pmCPU.c b/osfmk/i386/pmCPU.c
index 22eafd1b8df26dee214e90833f7a10a0eec22f91..b22749df79e3ce64935e3ba068baf6815d4611f2 100644 (file)
--- a/osfmk/i386/pmCPU.c
+++ b/osfmk/i386/pmCPU.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2004-2010 Apple Inc. All rights reserved.
+ * Copyright (c) 2004-2011 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -54,16 +54,17 @@
 
 extern int disableConsoleOutput;
 
-decl_simple_lock_data(,pm_init_lock);
+#define DELAY_UNSET            0xFFFFFFFFFFFFFFFFULL
 
 /*
  * The following is set when the KEXT loads and initializes.
  */
 pmDispatch_t   *pmDispatch     = NULL;
 
-static uint32_t                pmInitDone      = 0;
-static boolean_t       earlyTopology   = FALSE;
-
+static uint32_t                pmInitDone              = 0;
+static boolean_t       earlyTopology           = FALSE;
+static uint64_t                earlyMaxBusDelay        = DELAY_UNSET;
+static uint64_t                earlyMaxIntDelay        = DELAY_UNSET;
 
 /*
  * Initialize the Cstate change code.
@@ -71,16 +72,6 @@ static boolean_t     earlyTopology   = FALSE;
 void
 power_management_init(void)
 {
-    static boolean_t   initialized     = FALSE;
-
-    /*
-     * Initialize the lock for the KEXT initialization.
-     */
-    if (!initialized) {
-       simple_lock_init(&pm_init_lock, 0);
-       initialized = TRUE;
-    }
-
     if (pmDispatch != NULL && pmDispatch->cstateInit != NULL)
        (*pmDispatch->cstateInit)();
 }
@@ -101,6 +92,20 @@ machine_idle(void)
     DBGLOG(cpu_handle, cpu_number(), MP_IDLE);
     MARK_CPU_IDLE(cpu_number());
 
+    if (pmInitDone) {
+       /*
+        * Handle case where ml_set_maxbusdelay() or ml_set_maxintdelay()
+        * were called prior to the CPU PM kext being registered.  We do
+        * this here since we know at this point the values will be first
+        * used since idle is where the decisions using these values is made.
+        */
+       if (earlyMaxBusDelay != DELAY_UNSET)
+           ml_set_maxbusdelay((uint32_t)(earlyMaxBusDelay & 0xFFFFFFFF));
+
+       if (earlyMaxIntDelay != DELAY_UNSET)
+           ml_set_maxintdelay(earlyMaxIntDelay);
+    }
+
     if (pmInitDone
        && pmDispatch != NULL
        && pmDispatch->MachineIdle != NULL)
@@ -201,8 +206,12 @@ pmMarkAllCPUsOff(void)
 static void
 pmInitComplete(void)
 {
-    if (earlyTopology && pmDispatch != NULL && pmDispatch->pmCPUStateInit != NULL)
+    if (earlyTopology
+       && pmDispatch != NULL
+       && pmDispatch->pmCPUStateInit != NULL) {
        (*pmDispatch->pmCPUStateInit)();
+       earlyTopology = FALSE;
+    }
 
     pmInitDone = 1;
 }
@@ -284,7 +293,7 @@ pmCPUGetDeadline(cpu_data_t *cpu)
 {
     uint64_t   deadline        = 0;
 
-       if (pmInitDone
+    if (pmInitDone
        && pmDispatch != NULL
        && pmDispatch->GetDeadline != NULL)
        deadline = (*pmDispatch->GetDeadline)(&cpu->lcpu);
@@ -448,7 +457,8 @@ ml_get_maxsnoop(void)
 {
     uint64_t   max_snoop       = 0;
 
-    if (pmDispatch != NULL
+    if (pmInitDone
+       && pmDispatch != NULL
        && pmDispatch->getMaxSnoop != NULL)
        max_snoop = pmDispatch->getMaxSnoop();
 
@@ -461,7 +471,8 @@ ml_get_maxbusdelay(void)
 {
     uint64_t   max_delay       = 0;
 
-    if (pmDispatch != NULL
+    if (pmInitDone
+       && pmDispatch != NULL
        && pmDispatch->getMaxBusDelay != NULL)
        max_delay = pmDispatch->getMaxBusDelay();
 
@@ -482,8 +493,11 @@ ml_set_maxbusdelay(uint32_t mdelay)
     uint64_t   maxdelay        = mdelay;
 
     if (pmDispatch != NULL
-       && pmDispatch->setMaxBusDelay != NULL)
+       && pmDispatch->setMaxBusDelay != NULL) {
+       earlyMaxBusDelay = DELAY_UNSET;
        pmDispatch->setMaxBusDelay(maxdelay);
+    } else
+       earlyMaxBusDelay = maxdelay;
 }
 
 uint64_t
@@ -505,8 +519,11 @@ void
 ml_set_maxintdelay(uint64_t mdelay)
 {
     if (pmDispatch != NULL
-       && pmDispatch->setMaxIntDelay != NULL)
+       && pmDispatch->setMaxIntDelay != NULL) {
+       earlyMaxIntDelay = DELAY_UNSET;
        pmDispatch->setMaxIntDelay(mdelay);
+    } else
+       earlyMaxIntDelay = mdelay;
 }
 
 boolean_t
@@ -811,6 +828,12 @@ pmKextRegister(uint32_t version, pmDispatch_t *cpuFuncs,
     if (cpuFuncs != NULL) {
        pmDispatch = cpuFuncs;
 
+       if (earlyTopology
+           && pmDispatch->pmCPUStateInit != NULL) {
+           (*pmDispatch->pmCPUStateInit)();
+           earlyTopology = FALSE;
+       }
+
        if (pmDispatch->pmIPIHandler != NULL) {
            lapic_set_pm_func((i386_intr_func_t)pmDispatch->pmIPIHandler);
        }