1/*
2*****************************************************************************
3**
4
5**  File        : Target_FLASH.ld
6**
7**  Abstract    : Linker script for Target Device with
8**                512Byte FLASH, 64KByte RAM
9**
10**                Set heap size, stack size and stack location according
11**                to application requirements.
12**
13**                Set memory bank area and size if external memory is used.
14**
15**  Date        : 2019-10-28
16**
17*****************************************************************************
18*/
19
20/* Entry Point */
21ENTRY(Reset_Handler)
22
23/* Highest address of the user mode stack */
24_estack = 0x20010000;    /* end of RAM */
25/* Generate a link error if heap and stack don't fit into RAM */
26_Min_Heap_Size = 0x400;      /* required amount of heap  */
27_Min_Stack_Size = 0x1000; /* required amount of stack */
28
29/* Specify the memory areas */
30MEMORY
31{
32RAM (xrw)      : ORIGIN = 0x20000000, LENGTH = 64K
33FLASH (rx)     : ORIGIN = 0x00000000, LENGTH = 512K
34}
35
36/* Define output sections */
37SECTIONS
38{
39  /* The startup code goes first into FLASH */
40  .isr_vector : AT(0)
41  {
42    . = ALIGN(4);
43    KEEP(*(.isr_vector)) /* Startup code */
44    . = ALIGN(4);
45  } >FLASH
46
47  .chipinit_section : AT(0xC0)
48  {
49    . = ALIGN(4);
50    *(.chipinit_section)           /* .text sections (code) */
51    *(.chipinit_section*)          /* .text* sections (code) */
52    *(.glue_7)         /* glue arm to thumb code */
53    *(.glue_7t)        /* glue thumb to arm code */
54    *(.eh_frame)
55
56    KEEP (*(.init))
57    KEEP (*(.fini))
58
59    . = ALIGN(4);
60    _etext = .;        /* define a global symbols at end of code */
61  } >FLASH
62
63  /* The program code and other data goes into FLASH */
64  .text :
65  {
66    . = ALIGN(4);
67    *(.text)           /* .text sections (code) */
68    *(.text*)          /* .text* sections (code) */
69    *(.glue_7)         /* glue arm to thumb code */
70    *(.glue_7t)        /* glue thumb to arm code */
71    *(.eh_frame)
72
73    KEEP (*(.init))
74    KEEP (*(.fini))
75
76    . = ALIGN(4);
77    _etext = .;        /* define a global symbols at end of code */
78  } >FLASH
79
80  /* Constant data goes into FLASH */
81  .rodata :
82  {
83    . = ALIGN(4);
84    *(.rodata)         /* .rodata sections (constants, strings, etc.) */
85    *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
86    . = ALIGN(4);
87  } >FLASH
88
89  .ARM.extab   : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >FLASH
90  .ARM : {
91    __exidx_start = .;
92    *(.ARM.exidx*)
93    __exidx_end = .;
94  } >FLASH
95
96  .preinit_array     :
97  {
98    PROVIDE_HIDDEN (__preinit_array_start = .);
99    KEEP (*(.preinit_array*))
100    PROVIDE_HIDDEN (__preinit_array_end = .);
101  } >FLASH
102  .init_array :
103  {
104    PROVIDE_HIDDEN (__init_array_start = .);
105    KEEP (*(SORT(.init_array.*)))
106    KEEP (*(.init_array*))
107    PROVIDE_HIDDEN (__init_array_end = .);
108  } >FLASH
109  .fini_array :
110  {
111    PROVIDE_HIDDEN (__fini_array_start = .);
112    KEEP (*(SORT(.fini_array.*)))
113    KEEP (*(.fini_array*))
114    PROVIDE_HIDDEN (__fini_array_end = .);
115  } >FLASH
116
117  /* used by the startup to initialize data */
118  _sidata = LOADADDR(.data);
119
120  /* Initialized data sections goes into RAM, load LMA copy after code */
121  .data :
122  {
123    . = ALIGN(4);
124    _sdata = .;        /* create a global symbol at data start */
125    *(.data)           /* .data sections */
126    *(.data*)          /* .data* sections */
127
128    . = ALIGN(4);
129    _edata = .;        /* define a global symbol at data end */
130  } >RAM AT> FLASH
131
132
133  /* Uninitialized data section */
134  . = ALIGN(4);
135  .bss :
136  {
137    /* This is used by the startup in order to initialize the .bss secion */
138    _sbss = .;         /* define a global symbol at bss start */
139    __bss_start__ = _sbss;
140    *(.bss)
141    *(.bss*)
142    *(COMMON)
143
144    . = ALIGN(4);
145    _ebss = .;         /* define a global symbol at bss end */
146    __bss_end__ = _ebss;
147  } >RAM
148
149  /* User_heap_stack section, used to check that there is enough RAM left */
150  ._user_heap_stack :
151  {
152    . = ALIGN(8);
153    PROVIDE ( end = . );
154    PROVIDE ( _end = . );
155    . = . + _Min_Heap_Size;
156    . = . + _Min_Stack_Size;
157    . = ALIGN(8);
158  } >RAM
159
160
161
162  /* Remove information from the standard libraries */
163  /DISCARD/ :
164  {
165    libc.a ( * )
166    libm.a ( * )
167    libgcc.a ( * )
168  }
169
170  .ARM.attributes 0 : { *(.ARM.attributes) }
171}
172
173
174