diff options
Diffstat (limited to 'payloads/libpayload/arch/armv7/head.S')
| -rw-r--r-- | payloads/libpayload/arch/armv7/head.S | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/payloads/libpayload/arch/armv7/head.S b/payloads/libpayload/arch/armv7/head.S new file mode 100644 index 0000000000..e1b5737ead --- /dev/null +++ b/payloads/libpayload/arch/armv7/head.S @@ -0,0 +1,52 @@ +/* + * 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. + */ + + .global _entry, _leave + .text + .align 4 + +/* + * Our entry point + */ +_entry: + + /* TODO: disable interrupts */ + /* TODO: Clear BSS */ + /* TODO: Setup new stack */ + /* TODO: Save old stack pointer */ + + /* Let's rock. */ + b start_main + + /* %eax has the return value - pass it on unmolested */ +_leave: + /* TODO: restore old stack pointer. */ + + /* Return to the original context. */ + mov pc, lr |