jumpto.s

来自「WinCE 3.0 BSP, 包含Inter SA1110, Intel_815」· S 代码 · 共 63 行

/*++
THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
PARTICULAR PURPOSE.
Copyright (c) 1995, 1996, 1997  Microsoft Corporation

Module Name:

    jumpto.s

Abstract:

    This module implements the jump to custom program service

Author:

    Jun Liu   22-Aug-1996

Revision History:

--*/

#include "kxmips.h"
#include <alt_def.h>


        .data;
        .globl  JumpStore
        .ent    JumpStore

JumpStore:
        .word   0
        .word   0

        .end    JumpStore


LEAF_ENTRY(JumpTo)

        .set noreorder

        la      t1,JumpStore
        sw      sp,0(t1)                // Save the old stack
        sw      ra,4(t1)                // Save the return address
        //move  sp,a1                   // Setup new stack

        jal     FlushDCache
        nop

        jal     InvalidateICache
        nop

        jal     a0                      // Jamp to the custom program   
        nop

        la      t1,JumpStore
        lw      ra,4(t1)                // Restore the return address
        jr      ra                      // Return to the monitor
        lw      sp,0(t1)                // Restore the old stack

        .end    JumpTo