reset1.s

完整的Bell实验室的嵌入式文件系统TFS

    .file "reset1.s"

/*  The SH2 is similar to the 68K.  The reset vector point is assumed to
 *  contain the resetPC (coldstart) followed by a stack pointer (MonStackEnd).
 *  This reset1.o object is needed ONLY for the image that is in control
 *  of the actual reset.  This may be the boot-block code or a stand-alone
 *  monitor that does not use the boot-block safety.
 *  The reason for this breakup of reset1.s and reset2.s is because of the
 *  fact that the SH2 reset vector is a pointer, not an instruction.  Because
 *  of this, the first byte of binary in the normal image of the monitor can
 *  not be jumped to.  When the monitor image is built to execute as a result
 *  of the boot-block CRC failure, then the first instruction in the image
 *  must be instruction; hence, in that case, this reset1.s is omitted from
 *  the build.
 *
 *  General notice:
 *  This code is part of a boot-monitor package developed as a generic base
 *  platform for embedded system designs.  As such, it is likely to be
 *  distributed to various projects beyond the control of the original
 *  author.  Please notify the author of any enhancements made or bugs found
 *  so that all may benefit from the changes.  In addition, notification back
 *  to the author will allow the new user to pick up changes that may have
 *  been made by other users after this version of the code was distributed.
 *
 *  Author: Ed Sutter
 *  email:  [e-mail]      (home: [e-mail])
 *  phone:  [phone]            (home: 908-889-5161)
 *
 */

    .import _coldstart
    .import _MonStackEnd
    .globl _reset1

    .text

_reset1:
    .long _coldstart        /* 0: Power-on reset PC */
    .long _MonStackEnd      /* 1: Power-on reset SP */
    .long _coldstart        /* 2: Manual reset PC   */
    .long _MonStackEnd      /* 3: Manual reset SP   */