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/*
 *  linux/arch/m68k/hp300/reboot.S
 *
 *  Copyright (C) 1998 Philip Blundell <philb@gnu.org>
 *
 *  Do the dirty work of rebooting the machine.  Basically we need to undo all the
 *  good stuff that head.S did when we started up.  The caches and MMU must be
 *  disabled and then we jump back to the PROM.  This is a bit gruesome but we put
 *  a brave face on it.
 */

/* XXX Doesn't work yet.  Not sure why and can't be bothered to fix it at the moment. */

        .globl  hp300_reset
hp300_reset:
        .chip   68030
        oriw    #0x0700,%sr                     /* cli() */
        movel   hp300_phys_ram_base, %d1
        movel   #0, %d0
        movec   %d0, %vbr                       /* reset vector table */
        lea     zero, %a0
        lea     1f, %a1
        add     %d1, %a0
        add     %d1, %a1
        pmove   %tc, %a0@
        bclr    #7, %a0@
        pmove   %a0@, %tc                       /* goodbye MMU */
        jmp     %a1@
1:      movel   #0x808, %d0
        movec   %d0, %cacr                      /* cache off */
        moveb   #0, 0x1ffff
        movel   #0x1a4, %a0
        jmp     %a0@

zero:   .quad   0