diff options
Diffstat (limited to 'c/src/lib/libbsp/m68k/gen68360/startup/linkcmds')
| -rw-r--r-- | c/src/lib/libbsp/m68k/gen68360/startup/linkcmds | 56 |
1 files changed, 45 insertions, 11 deletions
diff --git a/c/src/lib/libbsp/m68k/gen68360/startup/linkcmds b/c/src/lib/libbsp/m68k/gen68360/startup/linkcmds index 8869c380a7..6a2d950853 100644 --- a/c/src/lib/libbsp/m68k/gen68360/startup/linkcmds +++ b/c/src/lib/libbsp/m68k/gen68360/startup/linkcmds @@ -1,5 +1,7 @@ /* - * This file contains GNU linker directives for a generic MC68360 board. + * 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. * * Saskatchewan Accelerator Laboratory * University of Saskatchewan @@ -10,32 +12,64 @@ */ /* - * Declare on-board memory + * 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 = 4M + ram : ORIGIN = 0x00000000, LENGTH = 64M rom : ORIGIN = 0xFF000000, LENGTH = 1M dpram : ORIGIN = 0xFE000000, LENGTH = 8k } /* - * 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 below to use a constant value. + * Declare low-order three octets of Ethernet address. */ -HeapSize = DEFINED(HeapSize) ? HeapSize : 0x10000; -StackSize = DEFINED(StackSize) ? StackSize : 0x1000; +ETHERNET_ADDRESS = DEFINED(ETHERNET_ADDRESS) ? ETHERNET_ADDRESS : 0xDEAD12; /* - * Declare low-order three octets of Ethernet address + * 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. */ -ETHERNET_ADDRESS = DEFINED(ETHERNET_ADDRESS) ? ETHERNET_ADDRESS : 0xDEAD12; +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 */ |