xnu-344.49.tar.gz

[apple/xnu.git] / pexpert / ppc / pe_identify_machine.c

diff --git a/pexpert/ppc/pe_identify_machine.c b/pexpert/ppc/pe_identify_machine.c
index 3ff1df2f4571f2b4efc7096e3c9569728f3ea004..2266416d746f4baeb56675651576e621737f9740 100644 (file)
--- a/pexpert/ppc/pe_identify_machine.c
+++ b/pexpert/ppc/pe_identify_machine.c
@@ -3,19 +3,22 @@
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  * 
  * @APPLE_LICENSE_HEADER_END@
  */
@@ -43,38 +46,61 @@ void pe_identify_machine(void)
   bzero((void *)&gPEClockFrequencyInfo, sizeof(clock_frequency_info_t));
   
   // Start with default values.
-  gPEClockFrequencyInfo.bus_clock_rate_hz = 100000000;
-  gPEClockFrequencyInfo.cpu_clock_rate_hz = 300000000;
-  gPEClockFrequencyInfo.dec_clock_rate_hz =  25000000;
-  gPEClockFrequencyInfo.timebase_frequency_hz =  25000000;
+  gPEClockFrequencyInfo.timebase_frequency_hz = 25000000;
+  gPEClockFrequencyInfo.bus_clock_rate_hz     = 100000000;
+  gPEClockFrequencyInfo.cpu_clock_rate_hz     = 300000000;
 
   // Try to get the values from the device tree.
   if (DTFindEntry("device_type", "cpu", &cpu) == kSuccess) {
-    if (DTGetProperty(cpu, "bus-frequency",
-                     (void **)&value, &size) == kSuccess)
-      gPEClockFrequencyInfo.bus_clock_rate_hz = *value;
-    else {
-      if (DTLookupEntry(0, "/", &root) == kSuccess)
-       if (DTGetProperty(root, "clock-frequency",
-                         (void **)&value, &size) == kSuccess)
-         gPEClockFrequencyInfo.bus_clock_rate_hz = *value;
+    // Find the time base frequency first.
+    if (DTGetProperty(cpu, "timebase-frequency", (void **)&value, &size) == kSuccess) {
+      // timebase_frequency_hz is only 32 bits, and the device tree should never provide 64 bits
+      // so this if should never be taken.
+      if (size == 8) gPEClockFrequencyInfo.timebase_frequency_hz = *(unsigned long long *)value;
+      else gPEClockFrequencyInfo.timebase_frequency_hz = *value;
+    }
+    gPEClockFrequencyInfo.dec_clock_rate_hz = gPEClockFrequencyInfo.timebase_frequency_hz;
+    
+    // Find the bus frequency next.  Try the cpu node, then the root.
+    if (DTGetProperty(cpu, "bus-frequency", (void **)&value, &size) == kSuccess) {
+      if (size == 8) gPEClockFrequencyInfo.bus_frequency_hz = *(unsigned long long *)value;
+      else gPEClockFrequencyInfo.bus_frequency_hz = *value;
+    } else {
+      if (DTLookupEntry(0, "/", &root) == kSuccess) {
+       if (DTGetProperty(root, "clock-frequency", (void **)&value, &size) == kSuccess) {
+         if (size == 8) gPEClockFrequencyInfo.bus_frequency_hz = *(unsigned long long *)value;
+         else gPEClockFrequencyInfo.bus_frequency_hz = *value;
+       }
+      }
     }
     
-    if (DTGetProperty(cpu, "clock-frequency",
-                     (void **)&value, &size) == kSuccess)
-      gPEClockFrequencyInfo.cpu_clock_rate_hz = *value;
+    gPEClockFrequencyInfo.bus_frequency_min_hz = gPEClockFrequencyInfo.bus_frequency_hz;
+    gPEClockFrequencyInfo.bus_frequency_max_hz = gPEClockFrequencyInfo.bus_frequency_hz;
+    
+    if (gPEClockFrequencyInfo.bus_frequency_hz < 0x100000000ULL)
+      gPEClockFrequencyInfo.bus_clock_rate_hz = gPEClockFrequencyInfo.bus_frequency_hz;
+    else
+      gPEClockFrequencyInfo.bus_clock_rate_hz = 0xFFFFFFFF;
     
-    if (DTGetProperty(cpu, "timebase-frequency",
-                     (void **)&value, &size) == kSuccess) {
-      gPEClockFrequencyInfo.dec_clock_rate_hz = *value;
-      gPEClockFrequencyInfo.timebase_frequency_hz= *value;
+    // Find the cpu frequency last.
+    if (DTGetProperty(cpu, "clock-frequency", (void **)&value, &size) == kSuccess) {
+      if (size == 8) gPEClockFrequencyInfo.cpu_frequency_hz = *(unsigned long long *)value;
+      else gPEClockFrequencyInfo.cpu_frequency_hz = *value;
     }
+    
+    gPEClockFrequencyInfo.cpu_frequency_min_hz = gPEClockFrequencyInfo.cpu_frequency_hz;
+    gPEClockFrequencyInfo.cpu_frequency_max_hz = gPEClockFrequencyInfo.cpu_frequency_hz;
+    
+    if (gPEClockFrequencyInfo.cpu_frequency_hz < 0x100000000ULL)
+      gPEClockFrequencyInfo.cpu_clock_rate_hz = gPEClockFrequencyInfo.cpu_frequency_hz;
+    else
+      gPEClockFrequencyInfo.cpu_clock_rate_hz = 0xFFFFFFFF;
   }
   
   // Set the num / den pairs form the hz values.
   gPEClockFrequencyInfo.timebase_frequency_num = gPEClockFrequencyInfo.timebase_frequency_hz;
   gPEClockFrequencyInfo.timebase_frequency_den = 1;
-
+  
   gPEClockFrequencyInfo.bus_clock_rate_num = gPEClockFrequencyInfo.bus_clock_rate_hz;
   gPEClockFrequencyInfo.bus_clock_rate_den = 1;