[ros-diffs] [tkreuzer] 37822: - Implement iInitializeCouFeatures, replacing KiSetCR0Bits. This allows us to save / restore xmm registers - check supported cpu features

Author: tkreuzer
Date: Wed Dec  3 11:24:40 2008
New Revision: 37822

URL: http://svn.reactos.org/svn/reactos?rev=37822&view=rev
Log:
- Implement iInitializeCouFeatures, replacing KiSetCR0Bits. This allows us to save /
restore xmm registers
- check supported cpu features

Modified:
    branches/ros-amd64-bringup/reactos/ntoskrnl/include/internal/amd64/ke.h
    branches/ros-amd64-bringup/reactos/ntoskrnl/ke/amd64/cpu.c
    branches/ros-amd64-bringup/reactos/ntoskrnl/ke/amd64/kiinit.c

Modified: branches/ros-amd64-bringup/reactos/ntoskrnl/include/internal/amd64/ke.h
URL:
http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/ntosk…
==============================================================================
--- branches/ros-amd64-bringup/reactos/ntoskrnl/include/internal/amd64/ke.h [iso-8859-1]
(original)
+++ branches/ros-amd64-bringup/reactos/ntoskrnl/include/internal/amd64/ke.h [iso-8859-1]
Wed Dec  3 11:24:40 2008
@@ -120,10 +120,6 @@
 
 VOID
 NTAPI
-KiSetCR0Bits(VOID);
-
-VOID
-NTAPI
 KiGetCacheInformation(VOID);
 
 BOOLEAN
@@ -145,6 +141,10 @@
 ULONG
 NTAPI
 KiGetFeatureBits(VOID);
+
+VOID
+NTAPI
+KiInitializeCpuFeatures();
 
 ULONG KeAllocateGdtSelector(ULONG Desc[2]);
 VOID KeFreeGdtSelector(ULONG Entry);

Modified: branches/ros-amd64-bringup/reactos/ntoskrnl/ke/amd64/cpu.c
URL:
http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/ntosk…
==============================================================================
--- branches/ros-amd64-bringup/reactos/ntoskrnl/ke/amd64/cpu.c [iso-8859-1] (original)
+++ branches/ros-amd64-bringup/reactos/ntoskrnl/ke/amd64/cpu.c [iso-8859-1] Wed Dec  3
11:24:40 2008
@@ -240,6 +240,21 @@
 
 VOID
 NTAPI
+KiInitializeCpuFeatures()
+{
+    /* Enable Write-Protection */
+    __writecr0(__readcr0() | CR0_WP);
+
+    /* Disable fpu monitoring */
+    __writecr0(__readcr0() & ~CR0_MP);
+
+    /* Enable fx save restore support */
+    __writecr4(__readcr4() | CR4_FXSR);
+
+}
+
+VOID
+NTAPI
 KiGetCacheInformation(VOID)
 {
     PKIPCR Pcr = (PKIPCR)KeGetPcr();
@@ -348,23 +363,6 @@
 
 
 VOID
-NTAPI
-KiSetCR0Bits(VOID)
-{
-    ULONG64 Cr0;
-
-    /* Save current CR0 */
-    Cr0 = __readcr0();
-
-    /* If this is a 486, enable Write-Protection */
-    if (KeGetCurrentPrcb()->CpuType > 3) Cr0 |= CR0_WP;
-
-    /* Set new Cr0 */
-    __writecr0(Cr0);
-}
-
-
-VOID
 FASTCALL
 Ki386InitializeTss(IN PKTSS64 Tss,
                    IN PKIDTENTRY Idt,

Modified: branches/ros-amd64-bringup/reactos/ntoskrnl/ke/amd64/kiinit.c
URL:
http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/ntosk…
==============================================================================
--- branches/ros-amd64-bringup/reactos/ntoskrnl/ke/amd64/kiinit.c [iso-8859-1] (original)
+++ branches/ros-amd64-bringup/reactos/ntoskrnl/ke/amd64/kiinit.c [iso-8859-1] Wed Dec  3
11:24:40 2008
@@ -4,6 +4,7 @@
  * FILE:            ntoskrnl/ke/i386/kiinit.c
  * PURPOSE:         Kernel Initialization for x86 CPUs
  * PROGRAMMERS:     Alex Ionescu (alex.ionescu(a)reactos.org)
+ *                  Timo Kreuzer (timo.kreuzer(a)reactos.org)
  */
 
 /* INCLUDES *****************************************************************/
@@ -11,6 +12,9 @@
 #include <ntoskrnl.h>
 #define NDEBUG
 #include <debug.h>
+
+#define REQUIRED_FEATURE_BITS (KF_RDTSC|KF_CR4|KF_CMPXCHG8B|KF_XMMI|KF_XMMI64| \
+                               KF_NX_BIT)
 
 /* GLOBALS *******************************************************************/
 
@@ -393,7 +397,6 @@
                    IN CCHAR Number,
                    IN PLOADER_PARAMETER_BLOCK LoaderBlock)
 {
-    BOOLEAN NpxPresent;
     ULONG FeatureBits;
     ULONG PageDirectory[2];
     PVOID DpcStack;
@@ -401,14 +404,20 @@
     /* Detect and set the CPU Type */
     KiSetProcessorType();
 
-    /* Set CR0 features based on detected CPU */
-    KiSetCR0Bits();
-
     /* Initialize the Power Management Support for this PRCB */
 //    PoInitializePrcb(Prcb);
 
     /* Get the processor features for the CPU */
     FeatureBits = KiGetFeatureBits();
+
+    /* Check if we support all needed features */
+    if ((FeatureBits & REQUIRED_FEATURE_BITS) != REQUIRED_FEATURE_BITS)
+    {
+        /* If not, bugcheck system */
+        DPRINT1("CPU doesn't have needed features! Has: 0x%x, required:
0x%x\n",
+                FeatureBits, REQUIRED_FEATURE_BITS);
+        KeBugCheck(0);
+    }
 
     /* Set the default NX policy (opt-in) */
     SharedUserData->NXSupportPolicy = NX_SUPPORT_POLICY_OPTIN;
@@ -442,6 +451,9 @@
 
     /* Save feature bits */
     Prcb->FeatureBits = FeatureBits;
+
+    /* Initialize the CPU features */
+    KiInitializeCpuFeatures();
 
     /* Save CPU state */
     KiSaveProcessorControlState(&Prcb->ProcessorState);
@@ -461,7 +473,7 @@
         KeNodeBlock[0]->ProcessorMask = Prcb->SetMember;
 
         /* Set boot-level flags */
-        KeI386NpxPresent = NpxPresent;
+        KeI386NpxPresent = TRUE;
         KeI386CpuType = Prcb->CpuType;
         KeI386CpuStep = Prcb->CpuStep;
         KeProcessorArchitecture = PROCESSOR_ARCHITECTURE_INTEL;
@@ -758,9 +770,12 @@
         /* Check for break-in */
 //        if (KdPollBreakIn()) DbgBreakPointWithStatus(1);
     }
+DPRINT1("after KdInitSystem\n");
 
     /* Raise to HIGH_LEVEL */
     KfRaiseIrql(HIGH_LEVEL);
+
+FrLdrDbgPrint("before KiSetupStackAndInitializeKernel\n");
 
     /* Switch to new kernel stack and start kernel bootstrapping */
     KiSetupStackAndInitializeKernel(&KiInitialProcess.Pcb,