diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/mvme2307/boot')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/mvme2307/boot/Makefile.in | 65 | ||||
| -rw-r--r-- | c/src/lib/libbsp/powerpc/mvme2307/boot/start.S | 150 |
2 files changed, 215 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/mvme2307/boot/Makefile.in b/c/src/lib/libbsp/powerpc/mvme2307/boot/Makefile.in new file mode 100644 index 0000000000..aa930b2ae7 --- /dev/null +++ b/c/src/lib/libbsp/powerpc/mvme2307/boot/Makefile.in @@ -0,0 +1,65 @@ +# +# $Id$ +# + +@SET_MAKE@ +srcdir = @srcdir@ +top_srcdir = @top_srcdir@ +top_builddir = ../../../.. +subdir = libbsp/powerpc/mvme2307/boot + +RTEMS_ROOT = @RTEMS_ROOT@ +PROJECT_ROOT = @PROJECT_ROOT@ + +VPATH = @srcdir@ + +PGMS=${ARCH}/start.o + +# C source names, if any, go here -- minus the .c +C_PIECES= +C_FILES=$(C_PIECES:%=%.c) +C_O_FILES=$(C_PIECES:%=${ARCH}/%.o) + +H_FILES= + +# Assembly source names, if any, go here -- minus the .S +S_PIECES=start +S_FILES=$(S_PIECES:%=%.S) +S_O_FILES=$(S_FILES:%.S=${ARCH}/%.o) + +SRCS=$(C_FILES) $(CC_FILES) $(H_FILES) $(S_FILES) +OBJS=$(C_O_FILES) $(CC_O_FILES) $(S_O_FILES) + +include $(RTEMS_ROOT)/make/custom/@RTEMS_BSP@.cfg +include $(RTEMS_ROOT)/make/leaf.cfg + +INSTALL_CHANGE = @INSTALL_CHANGE@ + +# +# (OPTIONAL) Add local stuff here using += +# + +DEFINES += +CPPFLAGS += +CFLAGS += + +LD_PATHS += +LD_LIBS += +LDFLAGS += + +# +# Add your list of files to delete here. The config files +# already know how to delete some stuff, so you may want +# to just run 'make clean' first to see what gets missed. +# 'make clobber' already includes 'make clean' +# + +CLEAN_ADDITIONS += +CLOBBER_ADDITIONS += + +all: ${ARCH} $(SRCS) $(OBJS) $(PGM) + $(INSTALL_VARIANT) -m 555 ${PGMS} $(PROJECT_RELEASE)/lib + +Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status + cd $(top_builddir) \ + && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= $(SHELL) ./config.status diff --git a/c/src/lib/libbsp/powerpc/mvme2307/boot/start.S b/c/src/lib/libbsp/powerpc/mvme2307/boot/start.S new file mode 100644 index 0000000000..a40f6075e9 --- /dev/null +++ b/c/src/lib/libbsp/powerpc/mvme2307/boot/start.S @@ -0,0 +1,150 @@ +/* + * 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. + * + * $Id$ + */ + +#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 __sbss_start /* need to include sbss and bss sections */ + +.Lend = .-.LCTOC1 + .long _end + +.Lstack = .-.LCTOC1 /* stack address if set by user */ + .long __stack + +.Ltext_start = .-.LCTOC1 /* beginning of text segment */ + .long __text_start + + .text + /* PPCBUG ROM bootstrap record */ + .ascii "BOOT" /* "magic number" */ + .long 0x10 /* offset to first instruction */ + .long 0x16 /* length of record, including checksum */ + .ascii "BOOT" /* routine name */ + b _start /* code of routine */ + .short 0x6b79 /* checksum */ + .short 0x0000 /* space filler */ +.Lptr: + .long .LCTOC1-.Laddr + + .globl _start + .type _start,@function +_start: + 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 */ + + /* copy text and data to RAM */ + lwz r6,.Ltext_start(r5) /* calculate beginning of the text */ + lwz r7,.Lbss_start(r5) /* calculate end of the init data */ + + cmplw 1,r6,r7 + bc 4,4,.Ldone1 + + subf r8,r6,r7 /* number of bytes to copy */ + addi r8,r8,3 /* round up to next word boundary */ + srwi r9,r8,2 /* number of words to copy */ + mtctr r9 + addi r6,r6,-4 /* adjust so we can use stwu */ + add r8,r6,r4 /* get source address in ROM */ +.Lloop1: + lwzu r0,4(r8) /* load word from ROM */ + stwu r0,4(r6) /* store word to RAM */ + bdnz .Lloop1 + +.Ldone1: + + + /* clear bss */ + lwz r6,.Lbss_start(r5) /* calculate beginning of the BSS */ + lwz r7,.Lend(r5) /* calculate end of the BSS */ + + 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: + /* 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 */ + + /* jump to RAM and continue */ + ba .Lcontinue +.Lcontinue: + + /* invalidate instruction cache */ + mfspr r4,1008 /* read hid0 */ + ori r5,r4,0x00000800 /* set icfi bit */ + mtspr 1008,r5 + sync + isync + mtspr 1008,r4 /* restore hid0 */ + sync + isync + + /* 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 |