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author | Ralph Holmes <ralph@ybden.com> | 2015-12-08 23:10:24 +0000 |
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committer | Gedare Bloom <gedare@rtems.org> | 2015-12-08 21:17:00 -0500 |
commit | 999529516a32ae73f62c887370540d9574cdcecd (patch) | |
tree | b5d6155a4ef8f9c9c9656a2238790416b13026e7 /c/src/lib/libbsp/powerpc/score603e/start | |
parent | m68k/mvme136: Remove (diff) | |
download | rtems-999529516a32ae73f62c887370540d9574cdcecd.tar.bz2 |
powerpc/score603e: Remove (obselete).
Updates #2458.
Diffstat (limited to 'c/src/lib/libbsp/powerpc/score603e/start')
-rw-r--r-- | c/src/lib/libbsp/powerpc/score603e/start/start.S | 126 |
1 files changed, 0 insertions, 126 deletions
diff --git a/c/src/lib/libbsp/powerpc/score603e/start/start.S b/c/src/lib/libbsp/powerpc/score603e/start/start.S deleted file mode 100644 index d58d42c92b..0000000000 --- a/c/src/lib/libbsp/powerpc/score603e/start/start.S +++ /dev/null @@ -1,126 +0,0 @@ -/* - * This is based on the mvme-crt0.S file from libgloss/rs6000. - * crt0.S -- startup file for PowerPC systems. - * - * Copyright (c) 1995 Cygnus Support - * - * 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. - */ - -#include "ppc-asm.h" - - .file "start.s" - .section ".got2","aw" - .align 2 - -.LCTOC1 = .+32768 - - .extern FUNC_NAME(atexit) - .globl FUNC_NAME(__atexit) - .section ".sdata","aw" - .align 2 -FUNC_NAME(__atexit): /* tell C's eabi-ctor's we have an atexit function */ - .long FUNC_NAME(atexit)@fixup /* and that it is to register __do_global_dtors */ - - .section ".fixup","aw" - .align 2 - .long FUNC_NAME(__atexit) - - .section ".got2","aw" -.Ltable = .-.LCTOC1 - .long .LCTOC1 /* address we think .LCTOC1 is loaded at */ - -.Lbss_start = .-.LCTOC1 - .long _edata /* includes sbss and bss */ - -.Lend = .-.LCTOC1 - .long _end - -.Lstack = .-.LCTOC1 /* stack address if set by user */ - .long __stack - - .text -.Lptr: - .long .LCTOC1-.Laddr - - .globl start - .globl _start - .type start,@function - .type _start,@function -start: -_start: - b past_constants - /* Set MSR */ - .long _etext /* end of code space */ - .long _edata /* end of code and data space */ - -past_constants: - lis r5,0 - mr r4,r5 - ori r4,r4,0x0000 /* 0x2030 */ - mtmsr r4 - - /* The first generation board needed initialization here but the */ - /* second does not. */ - - bl .Laddr /* get current address */ -.Laddr: - mflr r4 /* real address of .Laddr */ - lwz r5,(.Lptr-.Laddr)(r4) /* linker generated address of .LCTOC1 */ - add r5,r5,r4 /* correct to real pointer */ - lwz r4,.Ltable(r5) /* get linker's idea of where .Laddr is */ - subf r4,r4,r5 /* calculate difference between where linked and current */ - - /* clear bss */ - lwz r6,.Lbss_start(r5) /* calculate beginning of the BSS */ - lwz r7,.Lend(r5) /* calculate end of the BSS */ - add r6,r6,r4 /* adjust pointers */ - add r7,r7,r4 - - cmplw 1,r6,r7 - bc 4,4,.Ldone - - subf r8,r6,r7 /* number of bytes to zero */ - srwi r9,r8,2 /* number of words to zero */ - mtctr r9 - li r0,0 /* zero to clear memory */ - addi r6,r6,-4 /* adjust so we can use stwu */ -.Lloop: - stwu r0,4(r6) /* zero bss */ - bdnz .Lloop - -.Ldone: - - lwz r0,.Lstack(r5) /* stack address or 0 */ - cmplwi 1,r0,0 /* equal to 0? */ - bc 12,6,.Lnostack /* use default stack if == 0 */ - mr sp,r0 /* use user defined stack */ - -.Lnostack: - - lis r13,_SDA_BASE_@ha - la r13,_SDA_BASE_@l(r13) /* Read-write small data */ - - /* set up initial stack frame */ - addi sp,sp,-4 /* make sure we don't overwrite debug mem */ - lis r0,0 - stw r0,0(sp) /* clear back chain */ - stwu sp,-56(sp) /* push another stack frame */ - - li r3, 0 /* command line */ - /* Let her rip */ - bl FUNC_NAME(boot_card) - - /* return value from boot_card is argument to exit */ - bl FUNC_NAME(exit) - trap -.Lstart: - .size _start,.Lstart-_start |