Commit | Line | Data |
---|---|---|
0da35f8b SS |
1 | # In microcomputer (MC) mode, the vectors are mapped into the on-chip ROM, |
2 | # otherwise in microprocessor (MP) mode the vectors are mapped to address 0 | |
3 | # on the external bus. In MC mode, the on-chip ROM contains a bootloader program | |
4 | # that loads the internal RAM from the serial port or external ROM. | |
5 | # | |
6 | # Common configurations: | |
7 | # 1. MC mode, no external memory (serial boot). | |
8 | # 2. MC mode, external RAM (serial boot). | |
9 | # 3. MC mode, external ROM. | |
10 | # 4. MC mode, external ROM, external RAM. | |
11 | # 5. MP mode, external ROM. | |
12 | # 6. MP mode, external ROM, external RAM. | |
13 | # 7. MP mode, external RAM (dual-port with hosting CPU or external debugger). | |
14 | # | |
15 | # Config TEXT DATA/BSS | |
16 | # 1. INT_RAM INT_RAM (mcmode,onchip) | |
17 | # 2. EXT_RAM EXT_RAM (mcmode,extram) | |
18 | # 3. INT_RAM INT_RAM (mcmode,onchip) | |
19 | # 4. EXT_RAM EXT_RAM (mcmode,extram) | |
20 | # 5. EXT_ROM INT_RAM (mpmode,onchip,extrom) | |
21 | # 6. EXT_ROM EXT_RAM (mpmode,extram,extrom) | |
22 | # 7. EXT_RAM EXT_RAM (mpmode,extram) | |
23 | # | |
24 | # In MC mode, TEXT and DATA are copied into RAM by the bootloader. | |
25 | # | |
26 | # In MP mode with external ROM, DATA needs to be copied into RAM at boot time. | |
27 | # | |
28 | # If there is external RAM it is better to use that and reserve the internal RAM | |
29 | # for data buffers. However, the address of the external RAM needs to be specified. | |
30 | # | |
31 | # This emulation assumes config 7. | |
32 | ||
33 | case $OUTPUT_ARCH in | |
be33c5dd SS |
34 | tic3x) OUTPUT_ARCHNAME="TMS320C3x" ;; |
35 | tic4x) OUTPUT_ARCHNAME="TMS320C4x" ;; | |
0da35f8b SS |
36 | esac |
37 | ||
38 | case $ONCHIP in | |
39 | yes) RAM=RAM; | |
40 | STACK_SIZE_DEFAULT=128; | |
41 | HEAP_SIZE_DEFAULT=0; | |
42 | ;; | |
43 | *) RAM=EXT0; | |
44 | STACK_SIZE_DEFAULT=0x1000; | |
45 | HEAP_SIZE_DEFAULT=0x4000; | |
46 | ;; | |
47 | esac | |
48 | ||
49 | TEXT_MEMORY=$RAM; | |
50 | DATA_MEMORY=$RAM; | |
51 | ||
52 | ||
53 | MEMORY_DEF=" | |
54 | /* C30 memory space. */ | |
55 | MEMORY | |
56 | { | |
57 | EXT0 : org = 0x0000000, len = 0x800000 /* External address bus. */ | |
58 | XBUS : org = 0x0800000, len = 0x002000 /* Expansion bus. */ | |
59 | IOBUS : org = 0x0804000, len = 0x002000 /* I/O BUS. */ | |
60 | RAM0 : org = 0x0809800, len = 0x000400 /* Internal RAM block 0. */ | |
61 | RAM1 : org = 0x0809a00, len = 0x000400 /* Internal RAM block 1. */ | |
62 | RAM : org = 0x0809800, len = 0x000800 /* Internal RAM. */ | |
63 | EXT1 : org = 0x080a000, len = 0x7f6000 /* External address bus. */ | |
64 | } | |
65 | " | |
026df7c5 NC |
66 | |
67 | test -z "$ENTRY" && ENTRY=_start | |
0da35f8b | 68 | |
026df7c5 | 69 | cat <<EOF |
0da35f8b SS |
70 | ${RELOCATING+/* Linker script for $OUTPUT_ARCHNAME executable. */} |
71 | ${RELOCATING-/* Linker script for $OUTPUT_ARCHNAME object file (ld -r). */} | |
72 | ||
026df7c5 NC |
73 | OUTPUT_FORMAT("${OUTPUT_FORMAT}") |
74 | OUTPUT_ARCH("${OUTPUT_ARCH}") | |
75 | ${LIB_SEARCH_DIRS} | |
026df7c5 | 76 | ENTRY(${ENTRY}) |
0da35f8b SS |
77 | |
78 | ${RELOCATING+ __HEAP_SIZE = DEFINED(__HEAP_SIZE) ? __HEAP_SIZE : ${HEAP_SIZE_DEFAULT};} | |
79 | ${RELOCATING+ __STACK_SIZE = DEFINED(__STACK_SIZE) ? __STACK_SIZE : ${STACK_SIZE_DEFAULT};} | |
80 | ||
81 | ${RELOCATING+${MEMORY_DEF}} | |
82 | ||
83 | /* In the small memory model the .data and .bss sections must be contiguous | |
84 | when loaded and fit within the same page. The DP register is loaded | |
85 | with the page address. */ | |
026df7c5 NC |
86 | |
87 | SECTIONS | |
88 | { | |
0da35f8b SS |
89 | /* Reset, interrupt, and trap vectors. */ |
90 | .vectors ${RELOCATING+ 0} : { | |
91 | *(.vectors) | |
92 | } ${RELOCATING+ > ${TEXT_MEMORY}} | |
93 | /* Constants. */ | |
94 | .const : { | |
026df7c5 | 95 | *(.const) |
0da35f8b SS |
96 | } ${RELOCATING+ > ${TEXT_MEMORY}} |
97 | /* Program code. */ | |
98 | .text : { | |
99 | ${RELOCATING+ __text = .;} | |
026df7c5 NC |
100 | ${RELOCATING+ *(.init)} |
101 | *(.text) | |
102 | ${CONSTRUCTING+ ___CTOR_LIST__ = .;} | |
103 | ${CONSTRUCTING+ LONG(___CTOR_END__ - ___CTOR_LIST__ - 2)} | |
104 | ${CONSTRUCTING+ *(.ctors)} | |
105 | ${CONSTRUCTING+ LONG(0);} | |
106 | ${CONSTRUCTING+ ___CTOR_END__ = .;} | |
107 | ${CONSTRUCTING+ ___DTOR_LIST__ = .;} | |
108 | ${CONSTRUCTING+ LONG(___DTOR_END__ - ___DTOR_LIST__ - 2)} | |
109 | ${CONSTRUCTING+ *(.dtors)} | |
110 | ${CONSTRUCTING+ LONG(0)} | |
111 | ${CONSTRUCTING+ ___DTOR_END__ = .;} | |
112 | ${RELOCATING+ *(.fini)} | |
0da35f8b SS |
113 | ${RELOCATING+ __etext = .;} |
114 | } ${RELOCATING+ > ${TEXT_MEMORY}} | |
115 | /* Global initialised variables. */ | |
116 | .data : | |
117 | { | |
118 | ${RELOCATING+ __data = .;} | |
119 | *(.data) | |
120 | ${RELOCATING+ __edata = .;} | |
121 | } ${RELOCATING+ > ${DATA_MEMORY}} | |
122 | /* Global uninitialised variables. */ | |
123 | .bss : { | |
124 | ${RELOCATING+ __bss = .;} | |
125 | *(.bss) | |
126 | *(COMMON) | |
127 | ${RELOCATING+ __end = .;} | |
128 | } ${RELOCATING+ > ${DATA_MEMORY}} | |
129 | /* Heap. */ | |
130 | .heap : | |
026df7c5 | 131 | { |
0da35f8b SS |
132 | ${RELOCATING+ __heap = .;} |
133 | ${RELOCATING+ . += __HEAP_SIZE}; | |
134 | } ${RELOCATING+ > ${DATA_MEMORY}} | |
135 | /* Stack (grows upward). */ | |
136 | .stack : | |
137 | { | |
138 | ${RELOCATING+ __stack = .;} | |
026df7c5 NC |
139 | *(.stack) |
140 | ${RELOCATING+ . = . + __STACK_SIZE}; | |
0da35f8b SS |
141 | } ${RELOCATING+ > ${DATA_MEMORY}} |
142 | .stab 0 ${RELOCATING+(NOLOAD)} : | |
026df7c5 NC |
143 | { |
144 | [ .stab ] | |
145 | } | |
0da35f8b | 146 | .stabstr 0 ${RELOCATING+(NOLOAD)} : |
026df7c5 NC |
147 | { |
148 | [ .stabstr ] | |
149 | } | |
026df7c5 NC |
150 | } |
151 | EOF |