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S390: ccw firmware: Add start assembly 

We want to write most of our code in C, so add a small assembly
stub that jumps straight into C code for us to continue booting.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2013-04-22 20:56:08 +02:00
parent d0249ce5a8
commit 80fea6e893
1 changed files with 16 additions and 0 deletions
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16
pc-bios/s390-ccw/start.S Normal file
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/*
* First stage boot loader for virtio devices. The compiled output goes
* into the pc-bios directory of qemu.
*
* Copyright (c) 2013 Alexander Graf <agraf@suse.de>
*
* This work is licensed under the terms of the GNU GPL, version 2 or (at
* your option) any later version. See the COPYING file in the top-level
* directory.
*/
.globl _start
_start:
larl %r15, stack + 0x8000 /* Set up stack */
j main /* And call C */