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/*
* start.S : RTEMS entry point
*
* Copyright (C) 1999 Eric Valette. valette@crf.canon.fr
*
* The license and distribution terms for this file may be
* found in found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* Modified for mvme3100 by T. Straumann, 2007.
*
* $Id$
*
*/
#include <rtems/asm.h>
#include <rtems/score/cpu.h>
#include <rtems/powerpc/powerpc.h>
#include <bspopts.h>
#define SYNC \
sync; \
isync
#define KERNELBASE 0x0
.text
.globl __rtems_entry_point
.type __rtems_entry_point,@function
__rtems_entry_point:
mr r31,r3
mr r30,r4
mr r29,r5
mr r28,r6
mr r27,r7
/* Use MotLoad's TLB setup for now; caches are on already */
bl __eabi /* setup EABI and SYSV environment */
bl zero_bss
/*
* restore original args
*/
mr r3,r31
mr r4,r30
mr r5,r29
mr r6,r28
mr r7,r27
bl save_boot_params
/*
* stack = &__rtems_end + 4096
*/
addis r9,r0, __rtems_end+(4096-PPC_MINIMUM_STACK_FRAME_SIZE)@ha
addi r9,r9, __rtems_end+(4096-PPC_MINIMUM_STACK_FRAME_SIZE)@l
/* align down to 16-bytes */
li r5, (CPU_STACK_ALIGNMENT - 1)
andc r1, r9, r5
/*
* We are now in a environment that is totally independent from
* bootloader setup.
*/
lis r5,environ@ha
la r5,environ@l(r5) /* environp */
li r4, 0 /* argv */
li r3, 0 /* argc */
bl boot_card
/* point of no return: reset board here ? */
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