diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/ppcn_60x/start/start.S')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/ppcn_60x/start/start.S | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/c/src/lib/libbsp/powerpc/ppcn_60x/start/start.S b/c/src/lib/libbsp/powerpc/ppcn_60x/start/start.S deleted file mode 100644 index c166cac877..0000000000 --- a/c/src/lib/libbsp/powerpc/ppcn_60x/start/start.S +++ /dev/null @@ -1,153 +0,0 @@ -/* - * This is based on the mvme-crt0.S file from libgloss/rs6000. - * crt0.S -- startup file for PowerPC systems. - * - * (c) 1998, Radstone Technology plc. - * - * - * This is an unpublished work the copyright in which vests - * in Radstone Technology plc. All rights reserved. - * - * The information contained herein is the property of Radstone - * Technology plc. and is supplied without liability for - * errors or omissions and no part may be reproduced, used or - * disclosed except as authorized by contract or other written - * permission. The copyright and the foregoing - * restriction on reproduction, use and disclosure extend to - * all the media in which this information may be - * embodied. - * - * 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. - * - * $Id$ - */ - -#include <ppc-asm.h> -#include <bsp.h> - - .file "start.s" - - .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) - - .text - .globl _start - .type _start,@function -_start: - /* Set MSR */ - /* - * Enable data and instruction address translation and floating point - */ - li r3,MSR_IR | MSR_DR | MSR_FP - mtmsr r3 - - /* - * The caches are already flushed by the firmware so just enable - */ - mfspr r3,HID0 -#if PPC_USE_DATA_CACHE - /* - * Enable data and instruction cache - */ - ori r3,r3 ,H0_60X_ICE | H0_60X_DCE -#else - /* - * Enable instruction cache only - */ - ori r3,r3 ,H0_60X_ICE -#endif - mtspr HID0,r3 - - /* clear bss */ - lis r6,__bss_start@h - ori r6,r6,__bss_start@l - lis r7,__bss_end@h - ori r7,r7,__bss_end@l - - cmplw 1,r6,r7 - bc 4,4,.Lbss_done - - 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 */ -.Lbss_loop: - stwu r0,4(r6) /* zero bss */ - bdnz .Lbss_loop - -.Lbss_done: - - /* clear sbss */ - lis r6,__sbss_start@h - ori r6,r6,__sbss_start@l - lis r7,__sbss_end@h - ori r7,r7,__sbss_end@l - - cmplw 1,r6,r7 - bc 4,4,.Lsbss_done - - 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 */ -.Lsbss_loop: - stwu r0,4(r6) /* zero sbss */ - bdnz .Lsbss_loop - -.Lsbss_done: - - lis sp,__stack@h - ori sp,sp,__stack@l - - /* 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 */ - - lis r5,environ@ha - la r5,environ@l(r5) /* environp */ - li r4, 0 /* argv */ - li r3, 0 /* argc */ - /* Let her rip */ - bl FUNC_NAME(boot_card) - - /* - * This should never get reached - */ - /* - * Return MSR to its reset state - */ - li r3,0 - mtmsr r3 - isync - - /* - * Call reset entry point - */ - lis r3,0xfff0 - ori r3,r3,0x100 - mtlr r3 - blr -.Lstart: - .size _start,.Lstart-_start |