reboot.S
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上传日期:2013-04-10
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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