/* ipiALib.s - Inter Processor Interrupt (IPI) handling I80x86 assembly routines *//* Copyright 1984-2002 Wind River Systems, Inc. *//*modification history--------------------01b,27feb02,hdn  renamed ipiStubShutdown() to ipiShutdownSup()01a,20feb02,hdn  written*//*DESCRIPTIONThis module contains the assembly language Inter Processor Interrupt (IPI)handling stub.  It is connected directly to the 80x86 IPI vectors.It sets up an appropriate environment and then calls a routinein ipiArchLib(1).SEE ALSO: ipiArchLib(1), loApicIntr.c*/#define _ASMLANGUAGE#include "vxWorks.h"#include "asm.h"#include "regs.h"#include "esf.h"#include "iv.h"#include "excLib.h"#include "private/taskLibP.h"/* defines */	.data	.globl	FUNC(copyright_wind_river)	.long	FUNC(copyright_wind_river)       	/* externals */	.globl	FUNC(ipiHandler)	/* IPI handler */	.globl	VAR(sysNcpu)		/* number of CPUs */	.globl	VAR(sysLockSem)		/* MP Lock Semaphore */	/* internals */	.globl	GTEXT(ipiCallTbl)	/* IPI call-table */	.globl	GTEXT(ipiStub)		/* IPI handler stub */	.globl	GTEXT(ipiShutdownSup)	/* IPI handler stub: Shutdown */	.globl	GTEXT(ipiHandlerTlbFlush) /* IPI handler: TLB flush */	.globl	GTEXT(ipiHandlerTscReset) /* IPI handler: TSC reset */	.text	.balign 16/**************************************************************************** ipiCallTbl - table of IPI calls** NOMANUAL*/FUNC_LABEL(ipiCallTbl)	call	FUNC(ipiStub); nop; nop; nop;	/* */	call	FUNC(ipiStub); nop; nop; nop;	/* */	call	FUNC(ipiStub); nop; nop; nop;	/* */	call	FUNC(ipiStub); nop; nop; nop;	/* */	call	FUNC(ipiStub); nop; nop; nop;	/* */	call	FUNC(ipiStub); nop; nop; nop;	/* */	call	FUNC(ipiStub); nop; nop; nop;	/* */	call	FUNC(ipiStub); nop; nop; nop;	/* *//*********************************************************************** ipiStub - IPI handler ** This routine is the default IPI handler. ** NOMANUAL*/	.balign 16,0x90FUNC_LABEL(ipiStub)		/* create REG_SET on the stack */					/* return address is the PC */	pushfl				/* push EFLAGS */	pushal				/* push general registers */	movl	%esp, %ebp		/* save pointer to REG_SET to %ebp */	/* compute vector offset from return address to call-table */	movl	REG_PC(%ebp), %eax	/* get call return addr */	subl	$5, %eax		/* adjust ret addr to be call addr */	subl	$FUNC(ipiCallTbl), %eax	/* get offset from start of call-table */	shrl	$3, %eax		/* turn vector offset into index */	/* call ipiHandler */	pushl	%eax			/* push the index */	call	FUNC(ipiHandler)	/* do IPI processing */	addl	$4, %esp		/* clean up pushed argument */	/* restore general registers and return */	popal				/* pop general registers */	addl	$8, %esp		/* skip EFLAGS, PC */	iret				/* retry the instruction *//*********************************************************************** ipiHandlerTlbFlush - IPI handler to flush the TLB** NOMANUAL*/	.balign 16,0x90FUNC_LABEL(ipiHandlerTlbFlush)	movl	%cr3, %eax	movl	%eax, %cr3	ret/*********************************************************************** ipiHandlerTscReset - IPI handler to reset the TSC** NOMANUAL*/	.balign 16,0x90FUNC_LABEL(ipiHandlerTscReset)        xorl    %eax,%eax               /* zero low-order 32 bits */        xorl    %edx,%edx               /* zero high-order 32 bits */        movl    $ MSR_TSC,%ecx          /* specify MSR_TSC */        wrmsr                           /* write %edx:%eax to TSC */        ret/*********************************************************************** ipiShutdownSup - IPI handler to shutdown the CPU immediately** NOMANUAL*/	.balign 16,0x90FUNC_LABEL(ipiShutdownSup)	/* decrement the CPU counter */	movl	FUNC(sysNcpu), %eax	lock	decl	(%eax)	/* write-back & invalidate the cache */	wbinvd	/* lock interrupts & halt */	cli			/* LOCK INTERRUTPS */ipiShutdownSup1:	hlt	jmp	ipiShutdownSup1