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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <arch/asm.h>
/*
* Our entry point
*/
ENTRY(_entry)
/* TODO: disable interrupts */
/* Clear BSS */
mov r12, #0
ldr r2, bss_boundaries
ldr r3, bss_boundaries + 4
cmp r2, r3
beq no_bss
sub r3, #4 /* Account for late condition check. */
loop:
cmp r2, r3
str r12, [r2], #4
blt loop
no_bss:
/* Save off the location of the coreboot tables */
ldr r1, 1f
str r0, [r1]
/* Setup new stack */
ldr sp, 2f
/* TODO: Save old stack pointer and link register */
/* Let's rock. */
bl start_main
/* %r0 has the return value - pass it on unmolested */
/* TODO: restore old stack pointer and link register */
/* Return to the original context. */
bx lr
ENDPROC(_entry)
.align 4
bss_boundaries:
.word _edata
.word _end
1:
.word cb_header_ptr
2:
.word _stack
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