diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/psim/start/start.S')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/psim/start/start.S | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/c/src/lib/libbsp/powerpc/psim/start/start.S b/c/src/lib/libbsp/powerpc/psim/start/start.S deleted file mode 100644 index 918321af5f..0000000000 --- a/c/src/lib/libbsp/powerpc/psim/start/start.S +++ /dev/null @@ -1,141 +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 <rtems/asm.h> -#include <rtems/score/cpu.h> -#include <libcpu/io.h> -#include "ppc-asm.h" - - .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 bsp_section_sbss_begin - -.Lend = .-.LCTOC1 - .long bsp_section_bss_end - -.Lstack = .-.LCTOC1 /* stack address if set by user */ - .long __stack - - .text -.Lptr: - .long .LCTOC1-.Laddr - - .globl __rtems_entry_point - .type __rtems_entry_point,@function -__rtems_entry_point: -#if 1 - .globl _start - .type _start,@function -_start: -#endif - 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: -#ifdef __ALTIVEC__ - /* enable altivec; this requires the ALTIVEC user - * extension to be installed in the user extension - * slot 0! - */ - mfmsr r0 - oris r0, r0, (1<<(31-16-6)) - mtmsr r0 - isync - /* - * set vscr and vrsave to known values - */ - li r0, 0 - mtvrsave r0 - vxor 0,0,0 - mtvscr 0 -#endif - /* set up initial stack frame */ - addi sp,sp,-4 /* make sure we don't overwrite debug mem */ - /* align */ - li r3, CPU_STACK_ALIGNMENT-1 - andc sp, sp, r3 - lis r0,0 - stw r0,0(sp) /* clear back chain */ - stwu sp,-CPU_STACK_ALIGNMENT(sp) /* push another stack frame */ - bl FUNC_NAME(__eabi) - - /* Let her rip */ - li r3, 0 /* command line */ - bl FUNC_NAME(boot_card) - - .globl FUNC_NAME(bsp_reset) -FUNC_NAME(bsp_reset): - li 10,99 /* 0x63 */ - sc - -.Lstart: - .size _start,.Lstart-_start - - /* Start stack area */ -.section ".bsp_rwextra", "aw", @nobits -.align 4 -.space 4096 -__stack: |