| /* arch/m68knommu/platform/68360/head-rom.S |
| * |
| * Startup code for Motorola 68360 |
| * |
| * Copyright (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>, |
| * |
| */ |
| |
| .global _stext |
| .global _sbss |
| .global _start |
| |
| .global _rambase |
| .global _ramvec |
| .global _ramstart |
| .global _ramend |
| |
| .global _quicc_base |
| .global _periph_base |
| |
| #define RAMEND (CONFIG_RAMBASE + CONFIG_RAMSIZE) |
| |
| #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 OR2 (_dprbase + REGB + 0x0074) |
| #define BR2 (_dprbase + REGB + 0x0070) |
| |
| #define OR3 (_dprbase + REGB + 0x0084) |
| #define BR3 (_dprbase + REGB + 0x0080) |
| |
| #define OR4 (_dprbase + REGB + 0x0094) |
| #define BR4 (_dprbase + REGB + 0x0090) |
| |
| #define OR5 (_dprbase + REGB + 0x00A4) |
| #define BR5 (_dprbase + REGB + 0x00A0) |
| |
| #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 0x20000000 |
| #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 |
| * or |
| * (value + 1)*osc = system clock |
| * You do not need to divide the oscillator by 128 unless you want to. |
| */ |
| 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 #0x00400000, %d0 |
| subq.l #0x01, %d0 |
| eori.l #SIM_OR_MASK, %d0 |
| ori.l #SIM_OR0_MASK, %d0 |
| move.l %d0, OR0 |
| |
| move.l #__rom_start, %d0 |
| ori.l #SIM_BR0_MASK, %d0 |
| move.l %d0, BR0 |
| |
| move.l #0x0, BR1 |
| move.l #0x0, BR2 |
| move.l #0x0, BR3 |
| move.l #0x0, BR4 |
| move.l #0x0, BR5 |
| move.l #0x0, BR6 |
| move.l #0x0, BR7 |
| |
| 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 #_etext, %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 |
