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annotate nuc-fw/finlink/xram.lds @ 82:dd13211c9f10

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nuc-fw: building XIP code in Thumb as intended
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Sat, 17 Aug 2013 19:29:48 +0000
parents 39b1c369b67f
children
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1 /*
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2 * This linker script is used when building the ramImage version of
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3 * FreeCalypso firmware: the version which is to be test-run via fc-xram
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4 * without touching the flash. Everything is loaded into IRAM or XRAM,
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5 * and in this ld script we pretend as if the actual flash memory
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6 * does not exist.
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7 */
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8
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9 ENTRY(_FlashorXram_entry)
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10
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11 MEMORY {
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12 IRAM : ORIGIN = 0x00800000, LENGTH = 512K
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13 XRAM : ORIGIN = 0x01000000, LENGTH = 8M
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14 }
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15
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16 SECTIONS {
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17 /* XIP code, using XRAM to emulate flash */
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18 xip.text : {
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19 *(xip.text*)
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20 xipcode.o(.text*)
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21 *libplus.xip.a:(.text*)
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22 *libsprintf.a:(.text*)
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23 /* let's put the ARM->Thumb veneers in the XIP section */
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24 *(.glue_7)
80
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25 } > XRAM
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26
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27 /* copy-to-IRAM code */
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28 iram.text 0x80001C : {
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29 /* the 7 exception and interrupt vectors @ 0x80001C */
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30 *(iram.vectors)
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31 *(iram.text*)
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32 iramcode.o(.text*)
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33 *libplus.iram.a:(.text*)
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34 *libc.a:(.text*)
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35 *libgcc.a:(.text*)
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36 } > IRAM AT> XRAM
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37 __iramtext_ram_addr = ADDR(iram.text);
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38 __iramtext_flash_addr = LOADADDR(iram.text);
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39 __iramtext_size = SIZEOF(iram.text);
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40
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41 /* all .rodata will stay in flash */
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42 .rodata : {
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43 *(.rodata*)
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44 } > XRAM
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45
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46 /* all .data will go into XRAM */
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47 .data : {
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48 *(.data*)
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49 } > XRAM
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50
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51 /* we have two kinds of BSS: internal and external */
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52 int.bss (NOLOAD) : {
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53 *(int.bss*)
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54 iramcode.o(.bss* COMMON)
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55 *libplus.iram.a:(.bss* COMMON)
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56 *libc.a:(.bss* COMMON)
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57 *libgcc.a:(.bss* COMMON)
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58 . = ALIGN(4);
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59 } > IRAM
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60 __intbss_start = ADDR(int.bss);
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61 __intbss_size = SIZEOF(int.bss);
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62
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63 ext.bss (NOLOAD) : {
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64 *(ext.bss*)
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65 xipcode.o(.bss* COMMON)
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66 *libplus.xip.a:(.bss* COMMON)
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67 *libsprintf.a:(.bss* COMMON)
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68 . = ALIGN(4);
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69 } > XRAM
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70 __extbss_start = ADDR(ext.bss);
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71 __extbss_size = SIZEOF(ext.bss);
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72
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73 /* finally, we have "raw RAM": like BSS, but we don't zero it out */
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74 int.ram (NOLOAD) : {
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75 *(int.ram*)
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76 *(system_stack)
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77 *(irq_stack)
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78 *(fiq_stack)
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79 *(timer_hisr_stack)
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80 . = ALIGN(4);
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81 _iram_end = .;
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82 } > IRAM
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83
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84 ext.ram (NOLOAD) : {
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85 *(ext.ram*)
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86 . = ALIGN(4);
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87 _xram_end = .;
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88 } > XRAM
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89 }