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annotate gcc/ld-script.src @ 111:97297555c71a

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FFS dev.c flash device table reworked as described in TCS211-fw-arch
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 13 Oct 2018 16:32:07 +0000
parents 80e3a78126ac
children 16703b3fb211
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 dnl This ld script source is fed through m4 in order to fill in
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2 dnl those settings which depend on the configuration.
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3 dnl Two include files are fed to m4 before this main body:
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4 dnl the appropriate targets/*.m4 file defining the memory config
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5 dnl of the hardware, and one of flash.m4 or xram.m4 to select
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6 dnl the build type.
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7
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8 /*
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9 * FreeCalypso Selenite ld script for the Buildmem build
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10 */
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11
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12 ENTRY(_Firmware_boot_entry)
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13
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14 MEMORY {
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15 ifelse(Buildmem-FLASH_BOOT_VIA_BOOTROM,FLASH-1,
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16 ` FLASH_OVERLAY : ORIGIN = 0, LENGTH = 0x2000')
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17 ifelse(Buildmem,FLASH,
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18 ` FLASH : ORIGIN = FLASHIMAGE_BASE_ADDR,
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19 LENGTH = CONFIG_FWFLASH_SIZE - FLASHIMAGE_BASE_ADDR')
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20 IRAM : ORIGIN = 0x00800000, LENGTH = CONFIG_IRAM_SIZE
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21 XRAM : ORIGIN = 0x01000000, LENGTH = CONFIG_XRAM_SIZE
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22 }
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23
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24 SECTIONS {
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25 dnl The following sections exist only in the flashImage build,
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26 dnl and only on targets that use the Calypso boot ROM.
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27 ifelse(Buildmem-FLASH_BOOT_VIA_BOOTROM,FLASH-1,
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28 ` /* Part of flash overlaid by the boot ROM */
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29 bootrom.overlay 0 : {
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30 *(bootrom.overlay)
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31 } > FLASH_OVERLAY
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32
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33 /* code that enables the boot ROM and jumps to it */
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34 bootrom.switch : {
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35 *(bootrom.switch)
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36 } > IRAM AT> FLASH_OVERLAY
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37 __romswitch_ram_addr = ADDR(bootrom.switch);
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38 __romswitch_flash_addr = LOADADDR(bootrom.switch);
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39 __romswitch_size = SIZEOF(bootrom.switch);
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40 ')dnl
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41
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42 define(`INTTEXT_BASE_ADDR',
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43 ifelse(Buildmem,FLASH,FLASHIMAGE_BASE_ADDR,`/* no fixed address */'))dnl
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44
82
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45 /* boot entry code, going into flash or XRAM emulating flash */
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46 .inttext INTTEXT_BASE_ADDR : {
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47 *(.inttext)
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48 } > Buildmem
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49
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50 /* copy-to-IRAM code */
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51 iram.text 0x80001C : {
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52 /* the 7 exception and interrupt vectors @ 0x80001C */
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53 *(.ramvecs)
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54 *_ir.a:(.text*)
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55 *_int.a:(.text*)
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56 *_intram.a:(.text*)
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57 *osx_na7_db.a:(.text*)
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58 *tpudrv.a:(.text*)
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59 *drivers_flash.a:niq32.o(.text*)
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60 *sim_drv.a:sim32.o(.text*)
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61 *libc.a:(.text*)
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62 *libgcc.a:(.text*)
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63 } > IRAM Put_in_flash
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64 ifelse(Buildmem,FLASH,
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65 ` __iramtext_ram_addr = ADDR(iram.text);
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66 __iramtext_flash_addr = LOADADDR(iram.text);
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67 __iramtext_size = SIZEOF(iram.text);
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68 ')dnl
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69
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70 /* XIP code, going into flash or XRAM emulating flash */
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71 xip.text : {
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72 *(.text*)
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73 /* let's put the ARM->Thumb veneers in the XIP section */
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74 *(.glue_7)
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75 } > Buildmem
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76
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77 /* all .rodata will stay in flash */
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78 .rodata : {
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79 *(.rodata*)
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80 } > Buildmem
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81
97
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82 .bss_dar (NOLOAD) : {
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83 *dar_gbl_var.a:(.bss* COMMON)
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84 } > XRAM
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85
82
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86 /*
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87 * All .data will go into XRAM.
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88 * For the flash build we'll have a step that copies
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89 * the .data section from flash to XRAM; for the RAM-only
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90 * build it goes directly into XRAM and stays there.
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91 */
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92 .data : {
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93 *(.data*)
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94 } > XRAM Put_in_flash
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95 ifelse(Buildmem,FLASH,
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96 ` __initdata_ram_addr = ADDR(.data);
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97 __initdata_flash_addr = LOADADDR(.data);
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98 __initdata_size = SIZEOF(.data);
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99 ')dnl
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100
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101 /* we have two kinds of BSS: internal and external */
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102 int.bss (NOLOAD) : {
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103 *(.l1s_global)
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104 *_ir.a:(.bss* COMMON)
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105 *_int.a:(.bss* COMMON)
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106 *_intram.a:(.bss* COMMON)
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107 *osx_na7_db.a:(.bss* COMMON)
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108 *tpudrv.a:(.bss* COMMON)
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109 *libc.a:(.bss* COMMON)
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110 *libgcc.a:(.bss* COMMON)
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111 *(.API_HISR_stack)
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112 . = ALIGN(4);
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113 } > IRAM
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114 __intbss_start = ADDR(int.bss);
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115 __intbss_size = SIZEOF(int.bss);
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116
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117 ext.bss (NOLOAD) : {
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118 *(.bss* COMMON)
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119 . = ALIGN(4);
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120 } > XRAM
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121 __extbss_start = ADDR(ext.bss);
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122 __extbss_size = SIZEOF(ext.bss);
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123
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124 int.stack (NOLOAD) : ALIGN(8) {
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125 /* Beginning of stacks and heap area - 2.75 kbytes (int.s) */
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126 _Stack_segment_start = .;
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127 . += 0xB00;
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128 _Stack_segment_end = .;
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129
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130 _iram_end = .;
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131 } > IRAM
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132
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133 ext.stack (NOLOAD) : ALIGN(8) {
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134 /* Stack for abort and/or undefined modes. */
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135 . += 512;
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136 _Except_Stack_SP = .;
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137
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138 /* Leave 38 32bit words for state saving on exceptions. */
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139 xdump_buffer = .;
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140 . += 38 * 4;
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141
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142 _xram_end = .;
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143 } > XRAM
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144 }