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Diffstat (limited to 'cfe/cfe/applets/minicrt0.S')
| -rw-r--r-- | cfe/cfe/applets/minicrt0.S | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/cfe/cfe/applets/minicrt0.S b/cfe/cfe/applets/minicrt0.S new file mode 100644 index 0000000..937f240 --- /dev/null +++ b/cfe/cfe/applets/minicrt0.S @@ -0,0 +1,95 @@ +/* ********************************************************************* + * Broadcom Common Firmware Environment (CFE) + * + * Mini startup module for CFE apps File: minicrt0.S + * + * About the most minimal startup routine you can get. + * + * Author: Mitch Lichtenberg (mpl@broadcom.com) + * + ********************************************************************* + * + * Copyright 2000,2001,2002,2003 + * Broadcom Corporation. All rights reserved. + * + * This software is furnished under license and may be used and + * copied only in accordance with the following terms and + * conditions. Subject to these conditions, you may download, + * copy, install, use, modify and distribute modified or unmodified + * copies of this software in source and/or binary form. No title + * or ownership is transferred hereby. + * + * 1) Any source code used, modified or distributed must reproduce + * and retain this copyright notice and list of conditions + * as they appear in the source file. + * + * 2) No right is granted to use any trade name, trademark, or + * logo of Broadcom Corporation. The "Broadcom Corporation" + * name may not be used to endorse or promote products derived + * from this software without the prior written permission of + * Broadcom Corporation. + * + * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED + * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR + * PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT + * SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN + * PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR 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), EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGE. + ********************************************************************* */ + + +#include "sbmips.h" + +/* + * This module should be linked first! + */ + +#define STACK_SIZE 8192 + + .bss + .comm stack_bottom,STACK_SIZE + .comm __junk,4 + + .text + + .extern appletmain + .globl __start + +__start: + + /* + * Set up our GP (in case we're using it) + * Set up the stack pointer (don't use CFE's stack) + */ + + la gp,_gp + la sp,stack_bottom+STACK_SIZE-32 + + /* + * Zero BSS. No need to do this very efficiently, do it + * 32 bits at a time to ensure we can compile this + * with -mips1. + */ + + la t0,_fbss + la t1,_end + +1: sw zero,0(t0) + add t0,4 + blt t0,t1,1b + + /* + * Jump to main program. Note that we didn't trash A0..A3, + * our application will need them. So, if you add stuff here, + * be sure to preserve the A0..A3 registers for the C code. + */ + + j appletmain + |