diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/ss555/startup/linkcmds')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/ss555/startup/linkcmds | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/ss555/startup/linkcmds b/c/src/lib/libbsp/powerpc/ss555/startup/linkcmds new file mode 100644 index 0000000000..f316621ebc --- /dev/null +++ b/c/src/lib/libbsp/powerpc/ss555/startup/linkcmds @@ -0,0 +1,320 @@ +/* + * Linker command file for Intec SS555 board + * + * When debugging, we assume that the internal flash ROM will be replaced by + * the external RAM on the SS555 board. All sections are stacked starting + * at address zero. Nothing is placed in the internal RAM, since it's not + * contiguous with the external SRAM when the external RAM is placed at + * zero. + * + * For final production, we assume that the .text section will be burned + * into flash ROM starting at address zero. The .data, .bss, heap, and + * workspace will reside in RAM, starting at the beginning of the internal + * RAM. The system startup code will configure the external RAM to begin + * where the internal RAM ends, so as to make one large RAM block. + * + * Debugging mode is chosen when the RTEMS_DEBUG symbol is defined. The + * RTEMS_DEBUG symbol is defined in the bsp_specs file whenever make(1) is + * invoked with VARIANT=DEBUG. + * + * $Id$ + */ + +OUTPUT_FORMAT("elf32-powerpc", "elf32-powerpc", "elf32-powerpc") +OUTPUT_ARCH(powerpc) +ENTRY(start) + +int_ram_org = 0x003F9800; /* base of internal RAM */ +int_ram_top = 0x00400000; /* top of internal RAM */ +ext_ram_size = 0x00080000; /* size of external RAM */ + + +SECTIONS +{ + .vectors 0x0: + { + /* + * For the MPC555, we use the compressed vector table format which puts + * all of the exception vectors before 0x100. + */ + *(.vectors) + } + + .text 0x100: + { + /* Read-only sections, merged into text segment: */ + + text.start = .; + + /* Entry point is the .entry section */ + *(.entry) + *(.entry2) + + /* Actual code */ + *(.text) + *(.text.*) + + /* C++ constructors/destructors */ + *(.gnu.linkonce.t*) + + /* Initialization and finalization code. + * + * Various files can provide initialization and finalization functions. + * The bodies of these functions are in .init and .fini sections. We + * accumulate the bodies here, and prepend function prologues from + * ecrti.o and function epilogues from ecrtn.o. ecrti.o must be linked + * first; ecrtn.o must be linked last. Because these are wildcards, it + * doesn't matter if the user does not actually link against ecrti.o and + * ecrtn.o; the linker won't look for a file to match a wildcard. The + * wildcard also means that it doesn't matter which directory ecrti.o + * and ecrtn.o are in. + */ + PROVIDE (_init = .); + *ecrti.o(.init) + *(.init) + *ecrtn.o(.init) + + PROVIDE (_fini = .); + *ecrti.o(.fini) + *(.fini) + *ecrtn.o(.init) + + /* + * C++ constructors and destructors for static objects. + * PowerPC EABI does not use crtstuff yet, so we build "old-style" + * constructor and destructor lists that begin with the list length + * end terminate with a NULL entry. + */ + PROVIDE (__CTOR_LIST__ = .); + /* LONG((__CTOR_END__ - __CTOR_LIST__) / 4 - 2) */ + *crtbegin.o(.ctors) + *(.ctors) + *crtend.o(.ctors) + LONG(0) + PROVIDE (__CTOR_END__ = .); + + PROVIDE (__DTOR_LIST__ = .); + /* LONG((__DTOR_END__ - __DTOR_LIST__) / 4 - 2) */ + *crtbegin.o(.dtors) + *(.dtors) + *crtend.o(.dtors) + LONG(0) + PROVIDE (__DTOR_END__ = .); + + /* + * Special FreeBSD sysctl sections. + */ + . = ALIGN (16); + __start_set_sysctl_set = .; + *(set_sysctl_*); + __stop_set_sysctl_set = ABSOLUTE(.); + *(set_domain_*); + *(set_pseudo_*); + + /* Exception frame info */ + *(.eh_frame) + + /* Miscellaneous read-only data */ + _rodata_start = . ; + *(.gnu.linkonce.r*) + *(.lit) + *(.shdata) + *(.rodata*) + *(.rodata1) + *.(eh_frame) + *(.descriptors) + *(rom_ver) + _erodata = .; + + /* Various possible names for the end of the .text section */ + etext = ALIGN(0x10); + _etext = .; + _endtext = .; + text.end = .; + PROVIDE (etext = .); + PROVIDE (__etext = .); + + /* + * .data section contents, copied to RAM at system startup. + */ + . = ALIGN(0x20); + data.contents.start = .; + } + text.size = text.end - text.start; + + /* + * If debugging, stack the read/write sections directly after the text + * section. Otherwise, stack the read/write sections starting at base of + * internal RAM. + */ + . = DEFINED(RTEMS_DEBUG) ? . : int_ram_org; + + .data : AT (data.contents.start) + { + data.start = .; + + *(.data) + *(.data.*) + *(.data1) + + PROVIDE (__SDATA_START__ = .); + *(.sdata) + *(.gnu.linkonce.d*) + *(.gnu.linkonce.s.*) + PROVIDE (__SDATA_END__ = .); + + PROVIDE (__EXCEPT_START__ = .); + *(.gcc_except_table) + PROVIDE (__EXCEPT_END__ = .); + + PROVIDE(__GOT_START__ = .); + *(.got.plt) + *(.got) + PROVIDE(__GOT_END__ = .); + + *(.got1) + + PROVIDE (__GOT2_START__ = .); + PROVIDE (_GOT2_START_ = .); + *(.got2) + PROVIDE (__GOT2_END__ = .); + PROVIDE (_GOT2_END_ = .); + + PROVIDE (__FIXUP_START__ = .); + PROVIDE (_FIXUP_START_ = .); + *(.fixup) + PROVIDE (_FIXUP_END_ = .); + PROVIDE (__FIXUP_END__ = .); + + /* We want the small data sections together, so single-instruction + * offsets can access them all. + */ + PROVIDE (__SDATA2_START__ = .); + *(.sdata2) + *(.gnu.linkonce.s2.*) + PROVIDE (__SDATA2_END__ = .); + + data.end = .; + } + data.size = data.end - data.start; + + .bss : + { + bss.start = .; + + PROVIDE (__SBSS2_START__ = .); + *(.sbss2) + PROVIDE (__SBSS2_END__ = .); + + PROVIDE (__SBSS_START__ = .); + *(.sbss) + PROVIDE (__SBSS_END__ = .); + + *(.bss) + *(COMMON) + + . = ALIGN(4); + bss.end = .; + } + bss.size = bss.end - bss.start; + + PROVIDE(_end = bss.end); + + /* + * Initialization stack + */ + InitStack_start = ALIGN(0x10); + . += 0x1000; + initStack = .; + PROVIDE(initStackPtr = initStack); + + /* + * Interrupt stack + */ + IntrStack_start = ALIGN(0x10); + . += 0x4000; + intrStack = .; + PROVIDE(intrStackPtr = intrStack); + + _WorkspaceBase = .; + __WorkspaceBase = .; + + /* + * Heap + * + * The heap is configured at run-time to use all available memory. It + * begins just after the end of the Workspace and continues to the end of + * the external RAM. + */ + . = DEFINED(RTEMS_DEBUG) ? 0 + ext_ram_size : int_ram_top + ext_ram_size; + _HeapEnd = .; + __HeapEnd = .; + + + /* + * Internal I/O devices + */ + .usiu 0x002FC000: /* unified system interface unit */ + { + usiu = .; + } + + .imb 0x00300000: /* inter-module bus and devices */ + { + imb = .; + } + + .sram 0x00380000: /* internal SRAM control registers */ + { + sram = .; + } + + /* + * SS555 external devices managed by on-board CPLD + */ + .cpld 0xFF000000: /* SS555 external CPLD devices */ + { + cpld = .; + } + + + /* Stabs debugging sections. */ + .stab 0 : { *(.stab) } + .stabstr 0 : { *(.stabstr) } + .stab.excl 0 : { *(.stab.excl) } + .stab.exclstr 0 : { *(.stab.exclstr) } + .stab.index 0 : { *(.stab.index) } + .stab.indexstr 0 : { *(.stab.indexstr) } + .comment 0 : { *(.comment) } + + /* DWARF debug sections. + Symbols in the DWARF debugging sections are relative to the beginning + of the section so we begin them at 0. */ + /* DWARF 1 */ + .debug 0 : { *(.debug) } + .line 0 : { *(.line) } + + /* GNU DWARF 1 extensions */ + .debug_srcinfo 0 : { *(.debug_srcinfo) } + .debug_sfnames 0 : { *(.debug_sfnames) } + + /* DWARF 1.1 and DWARF 2 */ + .debug_aranges 0 : { *(.debug_aranges) } + .debug_pubnames 0 : { *(.debug_pubnames) } + + /* DWARF 2 */ + .debug_info 0 : { *(.debug_info) } + .debug_abbrev 0 : { *(.debug_abbrev) } + .debug_line 0 : { *(.debug_line) } + .debug_frame 0 : { *(.debug_frame) } + .debug_str 0 : { *(.debug_str) } + .debug_loc 0 : { *(.debug_loc) } + .debug_macinfo 0 : { *(.debug_macinfo) } + + /* SGI/MIPS DWARF 2 extensions */ + .debug_weaknames 0 : { *(.debug_weaknames) } + .debug_funcnames 0 : { *(.debug_funcnames) } + .debug_typenames 0 : { *(.debug_typenames) } + .debug_varnames 0 : { *(.debug_varnames) } + /* These must appear regardless of . */ +} |