[reactos] 07/11: [NTOS:KE/x64] Factor out KiInitializeP0BootStructures

[Timo Kreuzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=d2a3b1c7919031154a9d44...

commit d2a3b1c7919031154a9d447b71669f1e29ce043f
Author:     Timo Kreuzer [e-mail]
AuthorDate: Sat Dec 2 16:42:20 2023 +0200
Commit:     Timo Kreuzer [e-mail]
CommitDate: Fri Dec 8 20:16:51 2023 +0200

[NTOS:KE/x64] Factor out KiInitializeP0BootStructures
---
 ntoskrnl/ke/amd64/kiinit.c | 40 +++++++++++++++++++++++++---------------
 1 file changed, 25 insertions(+), 15 deletions(-)

diff --git a/ntoskrnl/ke/amd64/kiinit.c b/ntoskrnl/ke/amd64/kiinit.c
index 999b09b4fbe..568eefc0384 100644
--- a/ntoskrnl/ke/amd64/kiinit.c
+++ b/ntoskrnl/ke/amd64/kiinit.c
@@ -279,6 +279,29 @@ KiInitializeTss(
     Tss->Ist[3] = (ULONG64)NmiStack;
 }

+CODE_SEG("INIT")
+static
+VOID
+KiInitializeP0BootStructures(
+    _Inout_ PLOADER_PARAMETER_BLOCK LoaderBlock)
+{
+    /* Set the initial stack, idle thread and process for processor 0 */
+    LoaderBlock->KernelStack = (ULONG_PTR)KiP0BootStack;
+    LoaderBlock->Thread = (ULONG_PTR)&KiInitialThread;
+    LoaderBlock->Process = (ULONG_PTR)&KiInitialProcess.Pcb;
+    LoaderBlock->Prcb = (ULONG_PTR)&KiInitialPcr.Prcb;
+
+    /* Initialize the PCR */
+    KiInitializePcr(&KiInitialPcr, 0, &KiInitialThread.Tcb, KiP0DoubleFaultStack);
+
+    /* Setup the TSS descriptors and entries */
+    KiInitializeTss(&KiInitialPcr,
+                    KiInitialPcr.TssBase,
+                    KiP0BootStack,
+                    KiP0DoubleFaultStack,
+                    KiP0DoubleFaultStack);
+}
+
 CODE_SEG("INIT")
 VOID
 NTAPI
@@ -436,21 +459,8 @@ KiSystemStartup(IN PLOADER_PARAMETER_BLOCK LoaderBlock)
         /* Save the loader block */
         KeLoaderBlock = LoaderBlock;

-        /* Set the initial stack, idle thread and process */
-        LoaderBlock->KernelStack = (ULONG_PTR)KiP0BootStack;
-        LoaderBlock->Thread = (ULONG_PTR)&KiInitialThread;
-        LoaderBlock->Process = (ULONG_PTR)&KiInitialProcess.Pcb;
-        LoaderBlock->Prcb = (ULONG_PTR)&KiInitialPcr.Prcb;
-
-        /* Initialize the PCR */
-        KiInitializePcr(&KiInitialPcr, 0, &KiInitialThread.Tcb, KiP0DoubleFaultStack);
-
-        /* Setup the TSS descriptors and entries */
-        KiInitializeTss(&KiInitialPcr,
-                        KiInitialPcr.TssBase,
-                        KiP0BootStack,
-                        KiP0DoubleFaultStack,
-                        KiP0DoubleFaultStack);
+        /* Prepare LoaderBlock, PCR, TSS with the P0 boot data */
+        KiInitializeP0BootStructures(LoaderBlock);
     }

/* Get Pcr from loader block */