diff options
Diffstat (limited to 'src/soc/marvell/bg4cd/bootblock_asm.S')
| -rw-r--r-- | src/soc/marvell/bg4cd/bootblock_asm.S | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/src/soc/marvell/bg4cd/bootblock_asm.S b/src/soc/marvell/bg4cd/bootblock_asm.S new file mode 100644 index 0000000000..73ca46b278 --- /dev/null +++ b/src/soc/marvell/bg4cd/bootblock_asm.S @@ -0,0 +1,54 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2014 Google 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> + +ENTRY(_start) + /* + * Initialize the stack to a known value. This is used to check for + * stack overflow later in the boot process. + */ + ldr r0, =_stack + ldr r1, =_estack + ldr r2, =0xdeadbeef +init_stack_loop: + str r2, [r0] + add r0, #4 + cmp r0, r1 + bne init_stack_loop + +call_verstage: + ldr sp, =_estack /* Set up stack pointer */ + /* + * we don't bl here to preserve lr so that we can return to the caller + * of the bootblock + */ + b main +ENDPROC(_start) |