interim/devices/rpi2/rpi-boot/test_kernel/loader.s

/* Copyright (C) 2013 by John Cronin <jncronin@tysos.org>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

.global loader

.set ALIGN,	1<<0
.set MEMINFO,	1<<1
.set FLAGS,	ALIGN | MEMINFO
.set MAGIC,	0x1BADB002
.set CHECKSUM,	-(MAGIC + FLAGS)

mboot_header:
.long MAGIC
.long FLAGS
.long CHECKSUM

.section .text

stack_bottom:
.skip 1024
stack_top:
.comm mbd, 4
.comm magic, 4
.comm m_type, 4
.comm funcs, 4

loader:
	ldr	sp, =stack_top

	ldr	r4, =kmain
	blx	r4

halt:
	wfe
	b halt