| 1 | # Copyright (C) 2014-2020 Free Software Foundation, Inc. |
| 2 | # |
| 3 | # Copying and distribution of this file, with or without modification, |
| 4 | # are permitted in any medium without royalty provided the copyright |
| 5 | # notice and this notice are preserved. |
| 6 | |
| 7 | # In microcomputer (MC) mode, the vectors are mapped into the on-chip ROM, |
| 8 | # otherwise in microprocessor (MP) mode the vectors are mapped to address 0 |
| 9 | # on the external bus. In MC mode, the on-chip ROM contains a bootloader program |
| 10 | # that loads the internal RAM from the serial port or external ROM. |
| 11 | # |
| 12 | # Common configurations: |
| 13 | # 1. MC mode, no external memory (serial boot). |
| 14 | # 2. MC mode, external RAM (serial boot). |
| 15 | # 3. MC mode, external ROM. |
| 16 | # 4. MC mode, external ROM, external RAM. |
| 17 | # 5. MP mode, external ROM. |
| 18 | # 6. MP mode, external ROM, external RAM. |
| 19 | # 7. MP mode, external RAM (dual-port with hosting CPU or external debugger). |
| 20 | # |
| 21 | # Config TEXT DATA/BSS |
| 22 | # 1. INT_RAM INT_RAM (mcmode,onchip) |
| 23 | # 2. EXT_RAM EXT_RAM (mcmode,extram) |
| 24 | # 3. INT_RAM INT_RAM (mcmode,onchip) |
| 25 | # 4. EXT_RAM EXT_RAM (mcmode,extram) |
| 26 | # 5. EXT_ROM INT_RAM (mpmode,onchip,extrom) |
| 27 | # 6. EXT_ROM EXT_RAM (mpmode,extram,extrom) |
| 28 | # 7. EXT_RAM EXT_RAM (mpmode,extram) |
| 29 | # |
| 30 | # In MC mode, TEXT and DATA are copied into RAM by the bootloader. |
| 31 | # |
| 32 | # In MP mode with external ROM, DATA needs to be copied into RAM at boot time. |
| 33 | # |
| 34 | # If there is external RAM it is better to use that and reserve the internal RAM |
| 35 | # for data buffers. However, the address of the external RAM needs to be specified. |
| 36 | # |
| 37 | # This emulation assumes config 7. |
| 38 | |
| 39 | case $OUTPUT_ARCH in |
| 40 | tic3x) OUTPUT_ARCHNAME="TMS320C3x" ;; |
| 41 | tic4x) OUTPUT_ARCHNAME="TMS320C4x" ;; |
| 42 | esac |
| 43 | |
| 44 | case $ONCHIP in |
| 45 | yes) RAM=RAM; |
| 46 | STACK_SIZE_DEFAULT=128; |
| 47 | HEAP_SIZE_DEFAULT=0; |
| 48 | ;; |
| 49 | *) RAM=EXT0; |
| 50 | STACK_SIZE_DEFAULT=0x1000; |
| 51 | HEAP_SIZE_DEFAULT=0x4000; |
| 52 | ;; |
| 53 | esac |
| 54 | |
| 55 | TEXT_MEMORY=$RAM; |
| 56 | DATA_MEMORY=$RAM; |
| 57 | |
| 58 | |
| 59 | MEMORY_DEF=" |
| 60 | /* C30 memory space. */ |
| 61 | MEMORY |
| 62 | { |
| 63 | EXT0 : org = 0x0000000, len = 0x800000 /* External address bus. */ |
| 64 | XBUS : org = 0x0800000, len = 0x002000 /* Expansion bus. */ |
| 65 | IOBUS : org = 0x0804000, len = 0x002000 /* I/O BUS. */ |
| 66 | RAM0 : org = 0x0809800, len = 0x000400 /* Internal RAM block 0. */ |
| 67 | RAM1 : org = 0x0809a00, len = 0x000400 /* Internal RAM block 1. */ |
| 68 | RAM : org = 0x0809800, len = 0x000800 /* Internal RAM. */ |
| 69 | EXT1 : org = 0x080a000, len = 0x7f6000 /* External address bus. */ |
| 70 | } |
| 71 | " |
| 72 | |
| 73 | test -z "$ENTRY" && ENTRY=_start |
| 74 | |
| 75 | cat <<EOF |
| 76 | ${RELOCATING+/* Linker script for $OUTPUT_ARCHNAME executable. */} |
| 77 | ${RELOCATING-/* Linker script for $OUTPUT_ARCHNAME object file (ld -r). */} |
| 78 | |
| 79 | /* Copyright (C) 2014-2020 Free Software Foundation, Inc. |
| 80 | |
| 81 | Copying and distribution of this script, with or without modification, |
| 82 | are permitted in any medium without royalty provided the copyright |
| 83 | notice and this notice are preserved. */ |
| 84 | |
| 85 | OUTPUT_FORMAT("${OUTPUT_FORMAT}") |
| 86 | OUTPUT_ARCH("${OUTPUT_ARCH}") |
| 87 | ${LIB_SEARCH_DIRS} |
| 88 | ${RELOCATING+ENTRY (${ENTRY})} |
| 89 | |
| 90 | ${RELOCATING+ __HEAP_SIZE = DEFINED(__HEAP_SIZE) ? __HEAP_SIZE : ${HEAP_SIZE_DEFAULT};} |
| 91 | ${RELOCATING+ __STACK_SIZE = DEFINED(__STACK_SIZE) ? __STACK_SIZE : ${STACK_SIZE_DEFAULT};} |
| 92 | |
| 93 | ${RELOCATING+${MEMORY_DEF}} |
| 94 | |
| 95 | /* In the small memory model the .data and .bss sections must be contiguous |
| 96 | when loaded and fit within the same page. The DP register is loaded |
| 97 | with the page address. */ |
| 98 | |
| 99 | SECTIONS |
| 100 | { |
| 101 | /* Reset, interrupt, and trap vectors. */ |
| 102 | .vectors ${RELOCATING+ 0} : { |
| 103 | *(.vectors) |
| 104 | } ${RELOCATING+ > ${TEXT_MEMORY}} |
| 105 | /* Constants. */ |
| 106 | .const : { |
| 107 | *(.const) |
| 108 | } ${RELOCATING+ > ${TEXT_MEMORY}} |
| 109 | /* Program code. */ |
| 110 | .text : { |
| 111 | ${RELOCATING+ __text = .;} |
| 112 | ${RELOCATING+ KEEP (*(SORT_NONE(.init)))} |
| 113 | *(.text) |
| 114 | ${CONSTRUCTING+ ___CTOR_LIST__ = .;} |
| 115 | ${CONSTRUCTING+ LONG(___CTOR_END__ - ___CTOR_LIST__ - 2)} |
| 116 | ${CONSTRUCTING+ *(.ctors)} |
| 117 | ${CONSTRUCTING+ LONG(0);} |
| 118 | ${CONSTRUCTING+ ___CTOR_END__ = .;} |
| 119 | ${CONSTRUCTING+ ___DTOR_LIST__ = .;} |
| 120 | ${CONSTRUCTING+ LONG(___DTOR_END__ - ___DTOR_LIST__ - 2)} |
| 121 | ${CONSTRUCTING+ *(.dtors)} |
| 122 | ${CONSTRUCTING+ LONG(0)} |
| 123 | ${CONSTRUCTING+ ___DTOR_END__ = .;} |
| 124 | ${RELOCATING+ KEEP (*(SORT_NONE(.fini)))} |
| 125 | ${RELOCATING+ __etext = .;} |
| 126 | } ${RELOCATING+ > ${TEXT_MEMORY}} |
| 127 | /* Global initialised variables. */ |
| 128 | .data : |
| 129 | { |
| 130 | ${RELOCATING+ __data = .;} |
| 131 | *(.data) |
| 132 | ${RELOCATING+ __edata = .;} |
| 133 | } ${RELOCATING+ > ${DATA_MEMORY}} |
| 134 | /* Global uninitialised variables. */ |
| 135 | .bss : { |
| 136 | ${RELOCATING+ __bss = .;} |
| 137 | *(.bss) |
| 138 | *(COMMON) |
| 139 | ${RELOCATING+ __end = .;} |
| 140 | } ${RELOCATING+ > ${DATA_MEMORY}} |
| 141 | /* Heap. */ |
| 142 | .heap : |
| 143 | { |
| 144 | ${RELOCATING+ __heap = .;} |
| 145 | ${RELOCATING+ . += __HEAP_SIZE}; |
| 146 | } ${RELOCATING+ > ${DATA_MEMORY}} |
| 147 | /* Stack (grows upward). */ |
| 148 | .stack : |
| 149 | { |
| 150 | ${RELOCATING+ __stack = .;} |
| 151 | *(.stack) |
| 152 | ${RELOCATING+ . = . + __STACK_SIZE}; |
| 153 | } ${RELOCATING+ > ${DATA_MEMORY}} |
| 154 | .stab 0 ${RELOCATING+(NOLOAD)} : |
| 155 | { |
| 156 | [ .stab ] |
| 157 | } |
| 158 | .stabstr 0 ${RELOCATING+(NOLOAD)} : |
| 159 | { |
| 160 | [ .stabstr ] |
| 161 | } |
| 162 | } |
| 163 | EOF |