diff options
Diffstat (limited to 'c/src/lib/libbsp/m68k/gen68360/startup/linkcmds.bootp')
| -rw-r--r-- | c/src/lib/libbsp/m68k/gen68360/startup/linkcmds.bootp | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/gen68360/startup/linkcmds.bootp b/c/src/lib/libbsp/m68k/gen68360/startup/linkcmds.bootp new file mode 100644 index 0000000000..0fb1008376 --- /dev/null +++ b/c/src/lib/libbsp/m68k/gen68360/startup/linkcmds.bootp @@ -0,0 +1,146 @@ +/* + * This file contains GNU linker directives for a generic MC68360 board. + * Variations in hardware type and dynamic memory size can be made + * by overriding some values with linker command-line arguments. + * + * These linker directives are for producing a PROM version. + * To create the PROM image from the linker output you must use objcopy + * (--adjust-section-vma) to place the data segment at the end of the text + * segment in the PROM. The start-up code takes care of copying this region + * to RAM. + * + * Saskatchewan Accelerator Laboratory + * University of Saskatchewan + * Saskatoon, Saskatchewan, CANADA + * eric@skatter.usask.ca + * + * $Id$ + */ + +/* + * Declare some sizes. + * XXX: The assignment of ". += XyzSize;" fails in older gld's if the + * number used there is not constant. If this happens to you, edit + * the lines marked XXX below to use a constant value. + */ +RamSize = DEFINED(RamSize) ? RamSize : 4M; +HeapSize = DEFINED(HeapSize) ? HeapSize : 0x10000; +StackSize = DEFINED(StackSize) ? StackSize : 0x1000; + +/* + * Declare hardware type + */ +MC68360HardwareTypeMotorolaGeneric = 0; +MC68360HardwareTypeAtlasHSB = 1; +MC68360HardwareType = DEFINED(MC68360HardwareType) ? MC68360HardwareType : 0; + +/* + * Declare on-board memory. + * It would be nice if the ram length could be given as + * LENGTH=RamSize, but gld doesn't allow non-constant + * values in the LENGTH expression. + */ +MEMORY { + ram : ORIGIN = 0x00000000, LENGTH = 64M + myram : ORIGIN = 4M-512k, LENGTH = 512k + rom : ORIGIN = 0xFF000000, LENGTH = 1M + dpram : ORIGIN = 0xFE000000, LENGTH = 8k +} + +/* + * Declare low-order three octets of Ethernet address. + */ +ETHERNET_ADDRESS = DEFINED(ETHERNET_ADDRESS) ? ETHERNET_ADDRESS : 0xDEAD12; + +/* + * Declare hardware type. + * Acceptable values are: + * 0 - Generic system as described in the MC68360 User's Manual + * (MC68360UM/AD Rev. 1). + * 1 - ATLAS Computer Equipment Incorporated ACE360/HSB. + */ +MC68360HardwareType = DEFINED(MC68360HardwareType) ? MC68360HardwareType : 0; + +/* + * Load objects + */ +SECTIONS { + /* + * Hardware variations + */ + _RamSize = RamSize; + __RamSize = RamSize; + _MC68360HardwareType = MC68360HardwareType; + __MC68360HardwareType = MC68360HardwareType; + _MC68360HardwareTypeMotorolaGeneric = MC68360HardwareTypeMotorolaGeneric; + __MC68360HardwareTypeMotorolaGeneric = MC68360HardwareTypeMotorolaGeneric; + _MC68360HardwareTypeAtlasHSB = MC68360HardwareTypeAtlasHSB; + __MC68360HardwareTypeAtlasHSB = MC68360HardwareTypeAtlasHSB; + + /* + * Boot PROM + */ + rom : { + _RomBase = .; + __RomBase = .; + } >rom + + /* + * Dynamic RAM + */ + ram : { + _RamBase = .; + __RamBase = .; + } >ram + + /* + * Text, data and bss segments + */ + .text : AT (0x00000000) { + CREATE_OBJECT_SYMBOLS + *(.text) + . = ALIGN (16); + etext = .; + _etext = .; + } >rom + .data : AT(SIZEOF(.text)) { + copy_start = .; + *(.data) + . = ALIGN (16); + _edata = .; + copy_end = .; + } >myram + .bss : { + M68Kvec = .; + _M68Kvec = .; + . += (256 * 4); + clear_start = .; + *(.bss) + *(COMMON) + . = ALIGN (16); + _end = .; + + _HeapStart = .; + __HeapStart = .; + . += HeapSize; /* XXX -- Old gld can't handle this */ + . += StackSize; /* XXX -- Old gld can't handle this */ + /* . += 0x10000; */ /* HeapSize for old gld */ + /* . += 0x1000; */ /* StackSize for old gld */ + . = ALIGN (16); + stack_init = .; + clear_end = .; + + _WorkspaceBase = .; + __WorkspaceBase = .; + } >myram + + /* + * On-chip memory/peripherals + */ + dpram : { + m360 = .; + _m360 = .; + . += (8 * 1024); + + } >dpram +} |