arch/blackfin/kernel/vmlinux.lds.S

   1 /*
   2  * Copyright 2004-2009 Analog Devices Inc.
   3  *
   4  * Licensed under the GPL-2 or later
   5  */
   6
   7 #include <asm-generic/vmlinux.lds.h>
   8 #include <asm/mem_map.h>
   9 #include <asm/page.h>
  10 #include <asm/thread_info.h>
  11
  12 OUTPUT_FORMAT("elf32-bfin")
  13 ENTRY(__start)
  14 _jiffies = _jiffies_64;
  15
  16 SECTIONS
  17 {
  18 #ifdef CONFIG_RAMKERNEL
  19         . = CONFIG_BOOT_LOAD;
  20 #else
  21         . = CONFIG_ROM_BASE;
  22 #endif
  23
  24         /* Neither the text, ro_data or bss section need to be aligned
  25          * So pack them back to back
  26          */
  27         .text :
  28         {
  29                 __text = .;
  30                 _text = .;
  31                 __stext = .;
  32                 TEXT_TEXT
  33 #ifndef CONFIG_SCHEDULE_L1
  34                 SCHED_TEXT
  35 #endif
  36                 LOCK_TEXT
  37                 IRQENTRY_TEXT
  38                 KPROBES_TEXT
  39 #ifdef CONFIG_ROMKERNEL
  40                 __sinittext = .;
  41                 INIT_TEXT
  42                 __einittext = .;
  43                 EXIT_TEXT
  44 #endif
  45                 *(.text.*)
  46                 *(.fixup)
  47
  48 #if !L1_CODE_LENGTH
  49                 *(.l1.text)
  50 #endif
  51                 __etext = .;
  52         }
  53
  54         EXCEPTION_TABLE(4)
  55         NOTES
  56
  57         /* Just in case the first read only is a 32-bit access */
  58         RO_DATA(4)
  59         __rodata_end = .;
  60
  61 #ifdef CONFIG_ROMKERNEL
  62         . = CONFIG_BOOT_LOAD;
  63         .bss : AT(__rodata_end)
  64 #else
  65         .bss :
  66 #endif
  67         {
  68                 . = ALIGN(4);
  69                 ___bss_start = .;
  70                 *(.bss .bss.*)
  71                 *(COMMON)
  72 #if !L1_DATA_A_LENGTH
  73                 *(.l1.bss)
  74 #endif
  75 #if !L1_DATA_B_LENGTH
  76                 *(.l1.bss.B)
  77 #endif
  78                 . = ALIGN(4);
  79                 ___bss_stop = .;
  80         }
  81
  82 #if defined(CONFIG_ROMKERNEL)
  83         .data : AT(LOADADDR(.bss) + SIZEOF(.bss))
  84 #else
  85         .data :
  86 #endif
  87         {
  88                 __sdata = .;
  89                 /* This gets done first, so the glob doesn't suck it in */
  90                 CACHELINE_ALIGNED_DATA(32)
  91
  92 #if !L1_DATA_A_LENGTH
  93                 . = ALIGN(32);
  94                 *(.data_l1.cacheline_aligned)
  95                 *(.l1.data)
  96 #endif
  97 #if !L1_DATA_B_LENGTH
  98                 *(.l1.data.B)
  99 #endif
 100 #if !L2_LENGTH
 101                 . = ALIGN(32);
 102                 *(.data_l2.cacheline_aligned)
 103                 *(.l2.data)
 104 #endif
 105
 106                 DATA_DATA
 107                 CONSTRUCTORS
 108
 109                 INIT_TASK_DATA(THREAD_SIZE)
 110
 111                 __edata = .;
 112         }
 113         __data_lma = LOADADDR(.data);
 114         __data_len = SIZEOF(.data);
 115
 116         /* The init section should be last, so when we free it, it goes into
 117          * the general memory pool, and (hopefully) will decrease fragmentation
 118          * a tiny bit. The init section has a _requirement_ that it be
 119          * PAGE_SIZE aligned
 120          */
 121         . = ALIGN(PAGE_SIZE);
 122         ___init_begin = .;
 123
 124 #ifdef CONFIG_RAMKERNEL
 125         INIT_TEXT_SECTION(PAGE_SIZE)
 126
 127         /* We have to discard exit text and such at runtime, not link time, to
 128          * handle embedded cross-section references (alt instructions, bug
 129          * table, eh_frame, etc...).  We need all of our .text up front and
 130          * .data after it for PCREL call issues.
 131          */
 132         .exit.text :
 133         {
 134                 EXIT_TEXT
 135         }
 136
 137         . = ALIGN(16);
 138         INIT_DATA_SECTION(16)
 139         PERCPU_SECTION(32)
 140
 141         .exit.data :
 142         {
 143                 EXIT_DATA
 144         }
 145
 146         .text_l1 L1_CODE_START : AT(LOADADDR(.exit.data) + SIZEOF(.exit.data))
 147 #else
 148         .init.data : AT(__data_lma + __data_len + 32)
 149         {
 150                 __sinitdata = .;
 151                 INIT_DATA
 152                 INIT_SETUP(16)
 153                 INIT_CALLS
 154                 CON_INITCALL
 155                 SECURITY_INITCALL
 156                 INIT_RAM_FS
 157
 158                 . = ALIGN(PAGE_SIZE);
 159                 ___per_cpu_load = .;
 160                 PERCPU_INPUT(32)
 161
 162                 EXIT_DATA
 163                 __einitdata = .;
 164         }
 165         __init_data_lma = LOADADDR(.init.data);
 166         __init_data_len = SIZEOF(.init.data);
 167         __init_data_end = .;
 168
 169         .text_l1 L1_CODE_START : AT(__init_data_lma + __init_data_len)
 170 #endif
 171         {
 172                 . = ALIGN(4);
 173                 __stext_l1 = .;
 174                 *(.l1.text.head)
 175                 *(.l1.text)
 176 #ifdef CONFIG_SCHEDULE_L1
 177                 SCHED_TEXT
 178 #endif
 179                 . = ALIGN(4);
 180                 __etext_l1 = .;
 181         }
 182         __text_l1_lma = LOADADDR(.text_l1);
 183         __text_l1_len = SIZEOF(.text_l1);
 184         ASSERT (__text_l1_len <= L1_CODE_LENGTH, "L1 text overflow!")
 185
 186         .data_l1 L1_DATA_A_START : AT(__text_l1_lma + __text_l1_len)
 187         {
 188                 . = ALIGN(4);
 189                 __sdata_l1 = .;
 190                 *(.l1.data)
 191                 __edata_l1 = .;
 192
 193                 . = ALIGN(32);
 194                 *(.data_l1.cacheline_aligned)
 195
 196                 . = ALIGN(4);
 197                 __sbss_l1 = .;
 198                 *(.l1.bss)
 199                 . = ALIGN(4);
 200                 __ebss_l1 = .;
 201         }
 202         __data_l1_lma = LOADADDR(.data_l1);
 203         __data_l1_len = SIZEOF(.data_l1);
 204         ASSERT (__data_l1_len <= L1_DATA_A_LENGTH, "L1 data A overflow!")
 205
 206         .data_b_l1 L1_DATA_B_START : AT(__data_l1_lma + __data_l1_len)
 207         {
 208                 . = ALIGN(4);
 209                 __sdata_b_l1 = .;
 210                 *(.l1.data.B)
 211                 __edata_b_l1 = .;
 212
 213                 . = ALIGN(4);
 214                 __sbss_b_l1 = .;
 215                 *(.l1.bss.B)
 216                 . = ALIGN(4);
 217                 __ebss_b_l1 = .;
 218         }
 219         __data_b_l1_lma = LOADADDR(.data_b_l1);
 220         __data_b_l1_len = SIZEOF(.data_b_l1);
 221         ASSERT (__data_b_l1_len <= L1_DATA_B_LENGTH, "L1 data B overflow!")
 222
 223         .text_data_l2 L2_START : AT(__data_b_l1_lma + __data_b_l1_len)
 224         {
 225                 . = ALIGN(4);
 226                 __stext_l2 = .;
 227                 *(.l2.text)
 228                 . = ALIGN(4);
 229                 __etext_l2 = .;
 230
 231                 . = ALIGN(4);
 232                 __sdata_l2 = .;
 233                 *(.l2.data)
 234                 __edata_l2 = .;
 235
 236                 . = ALIGN(32);
 237                 *(.data_l2.cacheline_aligned)
 238
 239                 . = ALIGN(4);
 240                 __sbss_l2 = .;
 241                 *(.l2.bss)
 242                 . = ALIGN(4);
 243                 __ebss_l2 = .;
 244         }
 245         __l2_lma = LOADADDR(.text_data_l2);
 246         __l2_len = SIZEOF(.text_data_l2);
 247         ASSERT (__l2_len <= L2_LENGTH, "L2 overflow!")
 248
 249         /* Force trailing alignment of our init section so that when we
 250          * free our init memory, we don't leave behind a partial page.
 251          */
 252 #ifdef CONFIG_RAMKERNEL
 253         . = __l2_lma + __l2_len;
 254 #else
 255         . = __init_data_end;
 256 #endif
 257         . = ALIGN(PAGE_SIZE);
 258         ___init_end = .;
 259
 260         __end =.;
 261
 262         STABS_DEBUG
 263
 264         DWARF_DEBUG
 265
 266         DISCARDS
 267 }