69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
/**
|
|
* PROJECT: ExectOS
|
|
* COPYRIGHT: See COPYING.md in the top level directory
|
|
* FILE: xtoskrnl/ke/i686/krnlinit.c
|
|
* DESCRIPTION: CPU architecture specific kernel initialization
|
|
* DEVELOPERS: Rafal Kupiec <belliash@codingworkshop.eu.org>
|
|
*/
|
|
|
|
#include <xtos.h>
|
|
|
|
|
|
/**
|
|
* Performs architecture-specific initialization for the kernel executive.
|
|
*
|
|
* @return This routine does not return any value.
|
|
*
|
|
* @since XT 1.0
|
|
*/
|
|
XTAPI
|
|
VOID
|
|
KepInitializeMachine(VOID)
|
|
{
|
|
/* Re-enable IDE interrupts */
|
|
HlIoPortOutByte(0x376, 0);
|
|
HlIoPortOutByte(0x3F6, 0);
|
|
}
|
|
|
|
/**
|
|
* This routine starts up the XT kernel. It is called after switching boot stack.
|
|
*
|
|
* @return This routine does not return any value.
|
|
*
|
|
* @since XT 1.0
|
|
*/
|
|
XTAPI
|
|
VOID
|
|
KepStartKernel(VOID)
|
|
{
|
|
/* Print debug message */
|
|
DebugPrint(L"Starting ExectOS ...\n");
|
|
|
|
for(;;);
|
|
}
|
|
|
|
/**
|
|
* Switches to a new kernel boot stack.
|
|
*
|
|
* @return This routine does not return any value
|
|
*
|
|
* @since XT 1.0
|
|
*/
|
|
XTAPI
|
|
VOID
|
|
KepSwitchBootStack(IN ULONG_PTR Stack)
|
|
{
|
|
/* Discard old stack frame, switch stack, make space for NPX and jump to KepStartKernel() */
|
|
asm volatile("mov %0, %%edx\n"
|
|
"xor %%ebp, %%ebp\n"
|
|
"mov %%edx, %%esp\n"
|
|
"sub %1, %%esp\n"
|
|
"push %2\n"
|
|
"jmp _KepStartKernel@0\n"
|
|
:
|
|
: "m" (Stack),
|
|
"i" (KTRAP_FRAME_ALIGN | KTRAP_FRAME_SIZE | NPX_FRAME_SIZE),
|
|
"i" (CR0_EM | CR0_MP | CR0_TS),
|
|
"p" (KepStartKernel));
|
|
}
|