From f6145c3c15789123f6b4a9ce64a517048e753762 Mon Sep 17 00:00:00 2001 From: Jordan Crouse Date: Wed, 19 Mar 2008 23:56:58 +0000 Subject: libpayload: The initial chunk of code writen by AMD This is the initial chunk of code written by me and copyrighted by AMD. Includes everything but a few files that we pulled from outside sources. Signed-off-by: Jordan Crouse Acked-by: Uwe Hermann git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3170 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1 --- payloads/libpayload/i386/main.c | 79 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 payloads/libpayload/i386/main.c (limited to 'payloads/libpayload/i386/main.c') diff --git a/payloads/libpayload/i386/main.c b/payloads/libpayload/i386/main.c new file mode 100644 index 0000000000..846d46a426 --- /dev/null +++ b/payloads/libpayload/i386/main.c @@ -0,0 +1,79 @@ +/* + * 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 + +/* This structure seeds the stack. We provide + the return address of our main function, and + further down, the address of the function + that we call when we leave and try to restore + the original stack. At the very bottom of the + stack we store the orignal stack pointer + from the calling application +*/ + +static void start_main(void); +extern void _leave(void); + +static struct { + uint32_t eip[2]; + uint32_t raddr[2]; + uint32_t esp; +} initial_stack __attribute__((section (".istack"))) = { + { (uint32_t) start_main, 0 }, + { (uint32_t) _leave, 0 }, + (uint32_t) &initial_stack, +}; + +void * _istack = &initial_stack; + +/* This is our C entry function - set up the system + and jump into the payload entry point */ + +static void start_main(void) +{ + extern int main(void); + + /* Set up the consoles */ + console_init(); + + /* Gather system information */ + lib_get_sysinfo(); + + /* Any other system init that has to happen before the + user gets control goes here. */ + + /* Go to the entry point */ + + /* in the future we may care about the return value */ + (void) main(); + + /* Returning here will go to the _leave function to return + us to the original context */ +} -- cgit v1.2.3