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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 | /* arch/m68knommu/platform/68360/head-ram.S * * Startup code for Motorola 68360 * * Copyright 2001 (C) SED Systems, a Division of Calian Ltd. * Based on: arch/m68knommu/platform/68328/pilot/crt0_rom.S * Based on: arch/m68knommu/platform/68360/uCquicc/crt0_rom.S, 2.0.38.1.pre7 * uClinux Kernel * Copyright (C) Michael Leslie <mleslie@lineo.com> * Based on: arch/m68knommu/platform/68EZ328/ucsimm/crt0_rom.S * Copyright (C) 1998 D. Jeff Dionne <jeff@uclinux.org>, * */ #define ASSEMBLY .global _stext .global _start .global _rambase .global _ramvec .global _ramstart .global _ramend .global _quicc_base .global _periph_base #define RAMEND (CONFIG_RAMBASE + CONFIG_RAMSIZE) #define ROMEND (CONFIG_ROMBASE + CONFIG_ROMSIZE) #define REGB 0x1000 #define PEPAR (_dprbase + REGB + 0x0016) #define GMR (_dprbase + REGB + 0x0040) #define OR0 (_dprbase + REGB + 0x0054) #define BR0 (_dprbase + REGB + 0x0050) #define OR1 (_dprbase + REGB + 0x0064) #define BR1 (_dprbase + REGB + 0x0060) #define OR4 (_dprbase + REGB + 0x0094) #define BR4 (_dprbase + REGB + 0x0090) #define OR6 (_dprbase + REGB + 0x00b4) #define BR6 (_dprbase + REGB + 0x00b0) #define OR7 (_dprbase + REGB + 0x00c4) #define BR7 (_dprbase + REGB + 0x00c0) #define MCR (_dprbase + REGB + 0x0000) #define AVR (_dprbase + REGB + 0x0008) #define SYPCR (_dprbase + REGB + 0x0022) #define PLLCR (_dprbase + REGB + 0x0010) #define CLKOCR (_dprbase + REGB + 0x000C) #define CDVCR (_dprbase + REGB + 0x0014) #define BKAR (_dprbase + REGB + 0x0030) #define BKCR (_dprbase + REGB + 0x0034) #define SWIV (_dprbase + REGB + 0x0023) #define PICR (_dprbase + REGB + 0x0026) #define PITR (_dprbase + REGB + 0x002A) /* Define for all memory configuration */ #define MCU_SIM_GMR 0x00000000 #define SIM_OR_MASK 0x0fffffff /* Defines for chip select zero - the flash */ #define SIM_OR0_MASK 0x20000002 #define SIM_BR0_MASK 0x00000001 /* Defines for chip select one - the RAM */ #define SIM_OR1_MASK 0x10000000 #define SIM_BR1_MASK 0x00000001 #define MCU_SIM_MBAR_ADRS 0x0003ff00 #define MCU_SIM_MBAR_BA_MASK 0xfffff000 #define MCU_SIM_MBAR_AS_MASK 0x00000001 #define MCU_SIM_PEPAR 0x00B4 #define MCU_DISABLE_INTRPTS 0x2700 #define MCU_SIM_AVR 0x00 #define MCU_SIM_MCR 0x00005cff #define MCU_SIM_CLKOCR 0x00 #define MCU_SIM_PLLCR 0x8000 #define MCU_SIM_CDVCR 0x0000 #define MCU_SIM_SYPCR 0x0000 #define MCU_SIM_SWIV 0x00 #define MCU_SIM_PICR 0x0000 #define MCU_SIM_PITR 0x0000 #include <asm/m68360_regs.h> /* * By the time this RAM specific code begins to execute, DPRAM * and DRAM should already be mapped and accessible. */ .text _start: _stext: nop ori.w #MCU_DISABLE_INTRPTS, %sr /* disable interrupts: */ /* We should not need to setup the boot stack the reset should do it. */ movea.l #RAMEND, %sp /*set up stack at the end of DRAM:*/ set_mbar_register: moveq.l #0x07, %d1 /* Setup MBAR */ movec %d1, %dfc lea.l MCU_SIM_MBAR_ADRS, %a0 move.l #_dprbase, %d0 andi.l #MCU_SIM_MBAR_BA_MASK, %d0 ori.l #MCU_SIM_MBAR_AS_MASK, %d0 moves.l %d0, %a0@ moveq.l #0x05, %d1 movec.l %d1, %dfc /* Now we can begin to access registers in DPRAM */ set_sim_mcr: /* Set Module Configuration Register */ move.l #MCU_SIM_MCR, MCR /* to do: Determine cause of reset */ /* * configure system clock MC68360 p. 6-40 * (value +1)*osc/128 = system clock */ set_sim_clock: move.w #MCU_SIM_PLLCR, PLLCR move.b #MCU_SIM_CLKOCR, CLKOCR move.w #MCU_SIM_CDVCR, CDVCR /* Wait for the PLL to settle */ move.w #16384, %d0 pll_settle_wait: subi.w #1, %d0 bne pll_settle_wait /* Setup the system protection register, and watchdog timer register */ move.b #MCU_SIM_SWIV, SWIV move.w #MCU_SIM_PICR, PICR move.w #MCU_SIM_PITR, PITR move.w #MCU_SIM_SYPCR, SYPCR /* Clear DPRAM - system + parameter */ movea.l #_dprbase, %a0 movea.l #_dprbase+0x2000, %a1 /* Copy 0 to %a0 until %a0 == %a1 */ clear_dpram: movel #0, %a0@+ cmpal %a0, %a1 bhi clear_dpram configure_memory_controller: /* Set up Global Memory Register (GMR) */ move.l #MCU_SIM_GMR, %d0 move.l %d0, GMR configure_chip_select_0: move.l #RAMEND, %d0 subi.l #__ramstart, %d0 subq.l #0x01, %d0 eori.l #SIM_OR_MASK, %d0 ori.l #SIM_OR0_MASK, %d0 move.l %d0, OR0 move.l #__ramstart, %d0 ori.l #SIM_BR0_MASK, %d0 move.l %d0, BR0 configure_chip_select_1: move.l #ROMEND, %d0 subi.l #__rom_start, %d0 subq.l #0x01, %d0 eori.l #SIM_OR_MASK, %d0 ori.l #SIM_OR1_MASK, %d0 move.l %d0, OR1 move.l #__rom_start, %d0 ori.l #SIM_BR1_MASK, %d0 move.l %d0, BR1 move.w #MCU_SIM_PEPAR, PEPAR /* point to vector table: */ move.l #_romvec, %a0 move.l #_ramvec, %a1 copy_vectors: move.l %a0@, %d0 move.l %d0, %a1@ move.l %a0@, %a1@ addq.l #0x04, %a0 addq.l #0x04, %a1 cmp.l #_start, %a0 blt copy_vectors move.l #_ramvec, %a1 movec %a1, %vbr /* Copy data segment from ROM to RAM */ moveal #_stext, %a0 moveal #_sdata, %a1 moveal #_edata, %a2 /* Copy %a0 to %a1 until %a1 == %a2 */ LD1: move.l %a0@, %d0 addq.l #0x04, %a0 move.l %d0, %a1@ addq.l #0x04, %a1 cmp.l #_edata, %a1 blt LD1 moveal #_sbss, %a0 moveal #_ebss, %a1 /* Copy 0 to %a0 until %a0 == %a1 */ L1: movel #0, %a0@+ cmpal %a0, %a1 bhi L1 load_quicc: move.l #_dprbase, _quicc_base store_ram_size: /* Set ram size information */ move.l #_sdata, _rambase move.l #_ebss, _ramstart move.l #RAMEND, %d0 sub.l #0x1000, %d0 /* Reserve 4K for stack space.*/ move.l %d0, _ramend /* Different from RAMEND.*/ pea 0 pea env pea %sp@(4) pea 0 lea init_thread_union, %a2 lea 0x2000(%a2), %sp lp: jsr start_kernel _exit: jmp _exit .data .align 4 env: .long 0 _quicc_base: .long 0 _periph_base: .long 0 _ramvec: .long 0 _rambase: .long 0 _ramstart: .long 0 _ramend: .long 0 _dprbase: .long 0xffffe000 .text /* * These are the exception vectors at boot up, they are copied into RAM * and then overwritten as needed. */ .section ".data..initvect","awx" .long RAMEND /* Reset: Initial Stack Pointer - 0. */ .long _start /* Reset: Initial Program Counter - 1. */ .long buserr /* Bus Error - 2. */ .long trap /* Address Error - 3. */ .long trap /* Illegal Instruction - 4. */ .long trap /* Divide by zero - 5. */ .long trap /* CHK, CHK2 Instructions - 6. */ .long trap /* TRAPcc, TRAPV Instructions - 7. */ .long trap /* Privilege Violation - 8. */ .long trap /* Trace - 9. */ .long trap /* Line 1010 Emulator - 10. */ .long trap /* Line 1111 Emualtor - 11. */ .long trap /* Harware Breakpoint - 12. */ .long trap /* (Reserved for Coprocessor Protocol Violation)- 13. */ .long trap /* Format Error - 14. */ .long trap /* Uninitialized Interrupt - 15. */ .long trap /* (Unassigned, Reserver) - 16. */ .long trap /* (Unassigned, Reserver) - 17. */ .long trap /* (Unassigned, Reserver) - 18. */ .long trap /* (Unassigned, Reserver) - 19. */ .long trap /* (Unassigned, Reserver) - 20. */ .long trap /* (Unassigned, Reserver) - 21. */ .long trap /* (Unassigned, Reserver) - 22. */ .long trap /* (Unassigned, Reserver) - 23. */ .long trap /* Spurious Interrupt - 24. */ .long trap /* Level 1 Interrupt Autovector - 25. */ .long trap /* Level 2 Interrupt Autovector - 26. */ .long trap /* Level 3 Interrupt Autovector - 27. */ .long trap /* Level 4 Interrupt Autovector - 28. */ .long trap /* Level 5 Interrupt Autovector - 29. */ .long trap /* Level 6 Interrupt Autovector - 30. */ .long trap /* Level 7 Interrupt Autovector - 31. */ .long system_call /* Trap Instruction Vectors 0 - 32. */ .long trap /* Trap Instruction Vectors 1 - 33. */ .long trap /* Trap Instruction Vectors 2 - 34. */ .long trap /* Trap Instruction Vectors 3 - 35. */ .long trap /* Trap Instruction Vectors 4 - 36. */ .long trap /* Trap Instruction Vectors 5 - 37. */ .long trap /* Trap Instruction Vectors 6 - 38. */ .long trap /* Trap Instruction Vectors 7 - 39. */ .long trap /* Trap Instruction Vectors 8 - 40. */ .long trap /* Trap Instruction Vectors 9 - 41. */ .long trap /* Trap Instruction Vectors 10 - 42. */ .long trap /* Trap Instruction Vectors 11 - 43. */ .long trap /* Trap Instruction Vectors 12 - 44. */ .long trap /* Trap Instruction Vectors 13 - 45. */ .long trap /* Trap Instruction Vectors 14 - 46. */ .long trap /* Trap Instruction Vectors 15 - 47. */ .long 0 /* (Reserved for Coprocessor) - 48. */ .long 0 /* (Reserved for Coprocessor) - 49. */ .long 0 /* (Reserved for Coprocessor) - 50. */ .long 0 /* (Reserved for Coprocessor) - 51. */ .long 0 /* (Reserved for Coprocessor) - 52. */ .long 0 /* (Reserved for Coprocessor) - 53. */ .long 0 /* (Reserved for Coprocessor) - 54. */ .long 0 /* (Reserved for Coprocessor) - 55. */ .long 0 /* (Reserved for Coprocessor) - 56. */ .long 0 /* (Reserved for Coprocessor) - 57. */ .long 0 /* (Reserved for Coprocessor) - 58. */ .long 0 /* (Unassigned, Reserved) - 59. */ .long 0 /* (Unassigned, Reserved) - 60. */ .long 0 /* (Unassigned, Reserved) - 61. */ .long 0 /* (Unassigned, Reserved) - 62. */ .long 0 /* (Unassigned, Reserved) - 63. */ /* The assignment of these vectors to the CPM is */ /* dependent on the configuration of the CPM vba */ /* fields. */ .long 0 /* (User-Defined Vectors 1) CPM Error - 64. */ .long 0 /* (User-Defined Vectors 2) CPM Parallel IO PC11- 65. */ .long 0 /* (User-Defined Vectors 3) CPM Parallel IO PC10- 66. */ .long 0 /* (User-Defined Vectors 4) CPM SMC2 / PIP - 67. */ .long 0 /* (User-Defined Vectors 5) CPM SMC1 - 68. */ .long 0 /* (User-Defined Vectors 6) CPM SPI - 69. */ .long 0 /* (User-Defined Vectors 7) CPM Parallel IO PC9 - 70. */ .long 0 /* (User-Defined Vectors 8) CPM Timer 4 - 71. */ .long 0 /* (User-Defined Vectors 9) CPM Reserved - 72. */ .long 0 /* (User-Defined Vectors 10) CPM Parallel IO PC8- 73. */ .long 0 /* (User-Defined Vectors 11) CPM Parallel IO PC7- 74. */ .long 0 /* (User-Defined Vectors 12) CPM Parallel IO PC6- 75. */ .long 0 /* (User-Defined Vectors 13) CPM Timer 3 - 76. */ .long 0 /* (User-Defined Vectors 14) CPM Reserved - 77. */ .long 0 /* (User-Defined Vectors 15) CPM Parallel IO PC5- 78. */ .long 0 /* (User-Defined Vectors 16) CPM Parallel IO PC4- 79. */ .long 0 /* (User-Defined Vectors 17) CPM Reserved - 80. */ .long 0 /* (User-Defined Vectors 18) CPM RISC Timer Tbl - 81. */ .long 0 /* (User-Defined Vectors 19) CPM Timer 2 - 82. */ .long 0 /* (User-Defined Vectors 21) CPM Reserved - 83. */ .long 0 /* (User-Defined Vectors 22) CPM IDMA2 - 84. */ .long 0 /* (User-Defined Vectors 23) CPM IDMA1 - 85. */ .long 0 /* (User-Defined Vectors 24) CPM SDMA Bus Err - 86. */ .long 0 /* (User-Defined Vectors 25) CPM Parallel IO PC3- 87. */ .long 0 /* (User-Defined Vectors 26) CPM Parallel IO PC2- 88. */ .long 0 /* (User-Defined Vectors 27) CPM Timer 1 - 89. */ .long 0 /* (User-Defined Vectors 28) CPM Parallel IO PC1- 90. */ .long 0 /* (User-Defined Vectors 29) CPM SCC 4 - 91. */ .long 0 /* (User-Defined Vectors 30) CPM SCC 3 - 92. */ .long 0 /* (User-Defined Vectors 31) CPM SCC 2 - 93. */ .long 0 /* (User-Defined Vectors 32) CPM SCC 1 - 94. */ .long 0 /* (User-Defined Vectors 33) CPM Parallel IO PC0- 95. */ /* I don't think anything uses the vectors after here. */ .long 0 /* (User-Defined Vectors 34) - 96. */ .long 0,0,0,0,0 /* (User-Defined Vectors 35 - 39). */ .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 40 - 49). */ .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 50 - 59). */ .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 60 - 69). */ .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 70 - 79). */ .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 80 - 89). */ .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 90 - 99). */ .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 100 - 109). */ .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 110 - 119). */ .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 120 - 129). */ .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 130 - 139). */ .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 140 - 149). */ .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 150 - 159). */ .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 160 - 169). */ .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 170 - 179). */ .long 0,0,0,0,0,0,0,0,0,0 /* (User-Defined Vectors 180 - 189). */ .long 0,0,0 /* (User-Defined Vectors 190 - 192). */ .text ignore: rte |