diff options
Diffstat (limited to 'libgloss/mn10300/crt0_redboot.S')
| -rw-r--r-- | libgloss/mn10300/crt0_redboot.S | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/libgloss/mn10300/crt0_redboot.S b/libgloss/mn10300/crt0_redboot.S deleted file mode 100644 index c3667c542..000000000 --- a/libgloss/mn10300/crt0_redboot.S +++ /dev/null @@ -1,97 +0,0 @@ -/* - * crt0_redboot.S -- Minimal startup file for MN10300 targets running Redboot. - * - * Copyright (c) 2001 Red Hat, Inc. - * Derived from crt0_cygmon.S - Copyright (c) 1995, 1996, 1997, 2000 Red Hat, Inc. - * - * The authors hereby grant permission to use, copy, modify, distribute, - * and license this software and its documentation for any purpose, provided - * that existing copyright notices are retained in all copies and that this - * notice is included verbatim in any distributions. No written agreement, - * license, or royalty fee is required for any of the authorized uses. - * Modifications to this software may be copyrighted by their authors - * and need not follow the licensing terms described here, provided that - * the new terms are clearly indicated on the first page of each file where - * they apply. - */ - -/* - * This file contains the minimal startup code necessary. - * This will not do any hardware initialization. It is assumed that we are talking to Redboot - * and therefore the hardware will be initialized properly. - */ - -/* - * Set up some room for a stack. We just grab a chunk of memory. - */ -#define STACK_SIZE 0x4000 -#define GLOBAL_SIZE 0x2000 - -#define STARTUP_STACK_SIZE 0x0100 - - .comm __memsize, 12 - .comm __lstack, STARTUP_STACK_SIZE - .comm __stackbase,4 - - .section .text - .global _start -_start: - /* - * Setup a small stack so we can run some C code, - * and get the usable memory size. - */ - mov __lstack,a0 - add STARTUP_STACK_SIZE-4,a0 - mov a0,sp - - /* - * zero out the bss section. - */ - .global __memsize - .global _get_mem_info -zerobss: - mov __bss_start, a0 # These variables are defined in the linker script - mov _end, a1 - - cmp a0, a1 # If no bss, then do nothing - beq 7f - - clr d0 -3: - movbu d0,(a0) # Clear a byte and bump pointer - inc a0 - cmp a0, a1 - bne 3b - -7: - /* - * Setup the stack pointer -- - * get_mem_info returns the top of memory, so just use that In - * addition, we must subtract 24 bytes for the 3 8 byte - * arguments to main, in case main wants to write them back to - * the stack. The caller is supposed to allocate stack space - * for parameters in registers in the old MIPS ABIs. We must - * do this even though we aren't passing arguments, because - * main might be declared to have them. - * Some ports need a larger alignment for the stack, so we - * subtract 32, which satisifes the stack for the arguments and - * keeps the stack pointer better aligned. - */ - mov __memsize, d0 - call _get_mem_info,[],0 - - sub 32, a0 - mov a0, sp - - mov __stackbase, a1 - mov a0, (a1) # keep this for future ref - - call ___main,[],0 # Call __main to run ctors/dtors - clr d0 - clr d1 - mov d0, (4,sp) - or 0x0800,psw # Enable interrupts - call _main,[],0 # Call main program - call _exit,[],0 - -/* EOF crt0_redboot.S */ |