94 lines
2.1 KiB
ArmAsm
94 lines
2.1 KiB
ArmAsm
/*
|
|
* $FreeBSD$
|
|
* From: $NetBSD: start.S,v 1.4 1998/03/28 00:54:15 cgd Exp $
|
|
*/
|
|
|
|
/*
|
|
* Mach Operating System
|
|
* Copyright (c) 1992 Carnegie Mellon University
|
|
* All Rights Reserved.
|
|
*
|
|
* Permission to use, copy, modify and distribute this software and its
|
|
* documentation is hereby granted, provided that both the copyright
|
|
* notice and this permission notice appear in all copies of the
|
|
* software, derivative works or modified versions, and any portions
|
|
* thereof, and that both notices appear in supporting documentation.
|
|
*
|
|
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
|
|
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
|
|
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
|
*
|
|
* Carnegie Mellon requests users of this software to return to
|
|
*
|
|
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
|
* School of Computer Science
|
|
* Carnegie Mellon University
|
|
* Pittsburgh PA 15213-3890
|
|
*
|
|
* any improvements or extensions that they make and grant Carnegie Mellon
|
|
* the rights to redistribute these changes.
|
|
*/
|
|
|
|
#include <machine/asm.h>
|
|
|
|
/*
|
|
* start --
|
|
* Entry point for boot/standalone programs.
|
|
*
|
|
* Arguments:
|
|
* a0 long (first free physical page)
|
|
*
|
|
* This is where the prom comes to. Leaves all exception and interrupts
|
|
* to prom, runs off prom's stack too. No return values.
|
|
*/
|
|
.text
|
|
.set noreorder /* don't reorder instructions */
|
|
|
|
#define ENTRY_FRAME 32
|
|
#define STACK_SIZE 12288
|
|
|
|
NESTED(start, 1, ENTRY_FRAME, ra, 0, 0)
|
|
br pv,Lstartgp
|
|
Lstartgp:
|
|
LDGP(pv)
|
|
|
|
#ifndef BOOT1
|
|
CALL(extend_heap)
|
|
#endif
|
|
|
|
lda a0,_edata
|
|
lda a1,_end
|
|
subq a1,a0,a1
|
|
CALL(bzero)
|
|
|
|
#ifndef BOOT1
|
|
lda sp,stackbase + STACK_SIZE - ENTRY_FRAME
|
|
#endif
|
|
|
|
CALL(main) /* transfer to C */
|
|
|
|
XLEAF(_rtt, 0)
|
|
XLEAF(halt, 0)
|
|
call_pal PAL_halt /* halt if we ever return */
|
|
END(start)
|
|
|
|
/*
|
|
* Dummy routine for GCC2.
|
|
*/
|
|
LEAF(__main,0)
|
|
RET
|
|
END(__main)
|
|
|
|
/*
|
|
* cpu_number
|
|
* Return the cpu number, using the whami instruction.
|
|
*/
|
|
LEAF(cpu_number, 0)
|
|
call_pal PAL_VMS_mfpr_whami
|
|
RET
|
|
END(cpu_number)
|
|
|
|
#ifndef BOOT1
|
|
BSS(stackbase, STACK_SIZE)
|
|
#endif
|