4.104.114.84.95
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1 | /* |
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2 | * This file contains GNU linker directives for a generic MC68360 board. |
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3 | * These linker directives are for producing a PROM version.. |
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4 | * To create the PROM image from the linkter output you must use objcopy |
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5 | * (--adjust-section-vma) to place the data segment at the end of the text |
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6 | * segment in the PROM. The start-up code takes care of copying this region |
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7 | * to RAM. |
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8 | * |
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9 | * Saskatchewan Accelerator Laboratory |
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10 | * University of Saskatchewan |
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11 | * Saskatoon, Saskatchewan, CANADA |
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12 | * eric@skatter.usask.ca |
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13 | * |
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14 | * $Id$ |
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15 | */ |
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16 | |
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17 | /* |
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18 | * a.out format doesn't handle prom images very well |
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19 | */ |
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20 | OUTPUT_FORMAT(coff-m68k) |
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21 | |
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22 | /* |
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23 | * Declare on-board memory |
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24 | */ |
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25 | MEMORY { |
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26 | ram : ORIGIN = 0x00000000, LENGTH = 4M |
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27 | rom : ORIGIN = 0xFF000000, LENGTH = 1M |
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28 | dpram : ORIGIN = 0xFE000000, LENGTH = 8k |
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29 | } |
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30 | |
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31 | /* |
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32 | * Declare some sizes |
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33 | */ |
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34 | HeapSize = DEFINED(HeapSize) ? HeapSize : 0x10000; |
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35 | StackSize = DEFINED(StackSize) ? StackSize : 0x1000; |
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36 | |
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37 | /* |
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38 | * Declare low-order three octets of Ethernet address |
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39 | */ |
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40 | ETHERNET_ADDRESS = DEFINED(ETHERNET_ADDRESS) ? ETHERNET_ADDRESS : 0xDEAD12; |
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41 | |
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42 | /* |
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43 | * Load objects |
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44 | */ |
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45 | SECTIONS { |
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46 | /* |
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47 | * Boot PROM |
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48 | */ |
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49 | rom : { |
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50 | _RomBase = .; |
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51 | __RomBase = .; |
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52 | } >rom |
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53 | |
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54 | /* |
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55 | * Dynamic RAM |
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56 | */ |
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57 | ram : { |
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58 | _RamBase = .; |
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59 | __RamBase = .; |
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60 | } >ram |
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61 | |
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62 | /* |
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63 | * Text, data and bss segments |
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64 | */ |
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65 | .text : { |
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66 | CREATE_OBJECT_SYMBOLS |
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67 | *(.text) |
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68 | . = ALIGN (16); |
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69 | etext = .; |
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70 | _etext = .; |
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71 | } >rom |
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72 | .data : { |
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73 | copy_start = .; |
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74 | *(.data) |
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75 | . = ALIGN (16); |
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76 | _edata = .; |
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77 | copy_end = .; |
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78 | } >ram |
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79 | .bss : { |
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80 | M68Kvec = .; |
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81 | _M68Kvec = .; |
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82 | . += (256 * 4); |
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83 | clear_start = .; |
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84 | *(.bss) |
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85 | *(COMMON) |
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86 | . = ALIGN (16); |
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87 | _end = .; |
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88 | |
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89 | _HeapStart = .; |
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90 | __HeapStart = .; |
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91 | . += HeapSize; |
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92 | . += StackSize; |
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93 | . = ALIGN (16); |
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94 | stack_init = .; |
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95 | clear_end = .; |
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96 | |
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97 | _WorkspaceBase = .; |
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98 | __WorkspaceBase = .; |
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99 | } >ram |
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100 | |
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101 | /* |
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102 | * On-chip memory/peripherals |
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103 | */ |
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104 | dpram : { |
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105 | m360 = .; |
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106 | _m360 = .; |
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107 | . += (8 * 1024); |
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108 | |
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109 | } >dpram |
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110 | |
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111 | } |
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