projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 2966ca0e KM |
1 | /* |
| 2 | * Copyright (c) 1992 Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * Ralph Campbell. | |
| 7 | * | |
| 8 | * %sccs.include.redist.c% | |
| 9 | * | |
| 1eb51307 | 10 | * @(#)start.s 7.2 (Berkeley) %G% |
| 2966ca0e KM |
11 | * |
| 12 | * start.s - | |
| 13 | * | |
| 14 | * Contains code that is the first executed at boot time. | |
| 15 | * | |
| 16 | * Copyright (C) 1989 Digital Equipment Corporation. | |
| 17 | * Permission to use, copy, modify, and distribute this software and | |
| 18 | * its documentation for any purpose and without fee is hereby granted, | |
| 19 | * provided that the above copyright notice appears in all copies. | |
| 20 | * Digital Equipment Corporation makes no representations about the | |
| 21 | * suitability of this software for any purpose. It is provided "as is" | |
| 22 | * without express or implied warranty. | |
| 23 | * | |
| 24 | * from: $Header: /sprite/src/boot/decprom/ds3100.md/RCS/start.s, | |
| 25 | * v 1.1 90/02/16 16:19:39 shirriff Exp $ SPRITE (DECWRL) | |
| 26 | */ | |
| 27 | ||
| 1eb51307 | 28 | #include "../include/regdef.h" |
| 2966ca0e KM |
29 | #include "../include/machConst.h" |
| 30 | ||
| 31 | /* | |
| 32 | * Amount to take off of the stack for the benefit of the debugger. | |
| 33 | */ | |
| 34 | #define START_FRAME ((4 * 4) + 4 + 4) | |
| 35 | #define Init 0xbfc00018 | |
| 36 | ||
| 37 | .globl start | |
| 38 | start: | |
| 39 | .set noreorder | |
| 40 | mtc0 zero, MACH_COP_0_STATUS_REG # Disable interrupts | |
| 41 | li sp, MACH_CODE_START - START_FRAME | |
| 42 | la gp, _gp | |
| 43 | sw zero, START_FRAME - 4(sp) # Zero out old ra for debugger | |
| 44 | sw zero, START_FRAME - 8(sp) # Zero out old fp for debugger | |
| 45 | jal main # main(argc, argv, envp) | |
| 46 | nop | |
| 47 | li a0, Init # done, so call prom | |
| 48 | j a0 | |
| 49 | ||
| 50 | .globl Boot_Transfer | |
| 51 | Boot_Transfer: | |
| 52 | mtc0 zero, MACH_COP_0_STATUS_REG # Disable interrupts | |
| 53 | li sp, MACH_CODE_START - START_FRAME | |
| 54 | la gp, _gp | |
| 55 | sw zero, START_FRAME - 4(sp) # Zero out old ra for debugger | |
| 56 | sw zero, START_FRAME - 8(sp) # Zero out old fp for debugger | |
| 57 | jal a3 # Jump to routine | |
| 58 | nop |