92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
/**
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* PROJECT: ExectOS
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* COPYRIGHT: See COPYING.md in the top level directory
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* FILE: xtoskrnl/ke/krnlinit.c
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* DESCRIPTION: XT kernel initialization
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* DEVELOPERS: Rafal Kupiec <belliash@codingworkshop.eu.org>
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*/
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#include <xtos.h>
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/**
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* This routine starts up the XT kernel. It is called by boot loader.
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*
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* @param Parameters
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* Supplies a pointer to memory area containing parameters passed to kernel by bootloader.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTAPI
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VOID
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KeStartXtSystem(IN PKERNEL_INITIALIZATION_BLOCK Parameters)
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{
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/* Check if debugging enabled and if boot loader provided routine for debug printing */
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if(DEBUG && Parameters->LoaderInformation.DbgPrint)
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{
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/* Use loader's provided DbgPrint() routine for early printing to serial console */
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LdrDbgPrint = Parameters->LoaderInformation.DbgPrint;
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}
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/* Print some message to serial console and test kernel parameters */
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LdrPrint(L"Hello world from ExectOS kernel!\n");
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LdrPrint(L"\n\n------ Kernel parameters block ------\n"
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L"Loader block size: %lu\n"
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L"Loader block version: %lu\n"
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L"EFI Revision: %lu\n",
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Parameters->Size,
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Parameters->Version,
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Parameters->FirmwareInformation.EfiFirmware.EfiVersion
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);
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/* Save the kernel initialization block */
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KeInitializationBlock = Parameters;
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/* Initialize kernel stacks */
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KepInitializeStack(Parameters);
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/* Architecture specific initialization */
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KepArchInitialize();
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/* Initialize boot CPU */
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ArInitializeProcessor();
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/* Switch boot stack alligning it to 4 byte boundary */
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KepSwitchBootStack(KeInitializationBlock->KernelBootStack & ~0x3);
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}
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/**
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* Initializes a stack needed by the kernel.
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*
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* @param Parameters
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* Supplies a pointer to memory area containing parameters passed to kernel by bootloader.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTAPI
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VOID
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KepInitializeStack(IN PKERNEL_INITIALIZATION_BLOCK Parameters)
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{
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/* Make sure kernel boot stack is initialized */
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if(!Parameters->KernelBootStack)
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{
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/* Initialize kernel boot stack */
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LdrPrint(L"Initializing kernel boot stack\n");
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Parameters->KernelBootStack = (ULONG_PTR)&KepKernelBootStackData[KERNEL_STACK_SIZE];
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}
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/* Make sure kernel fault stack is initialized */
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if(!Parameters->KernelFaultStack)
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{
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/* Initialize kernel fault stack */
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LdrPrint(L"Initializing kernel fault stack\n");
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Parameters->KernelFaultStack = (ULONG_PTR)&KepKernelFaultStackData[KERNEL_STACK_SIZE];
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}
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}
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