diff options
Diffstat (limited to 'bsps/m68k/mcf5329/start/start.S')
| -rw-r--r-- | bsps/m68k/mcf5329/start/start.S | 379 |
1 files changed, 379 insertions, 0 deletions
diff --git a/bsps/m68k/mcf5329/start/start.S b/bsps/m68k/mcf5329/start/start.S new file mode 100644 index 0000000000..6063fdac74 --- /dev/null +++ b/bsps/m68k/mcf5329/start/start.S @@ -0,0 +1,379 @@ +/* + * mcf52235 startup code + * + * This file contains the entry point for the application. + * The name of this entry point is compiler dependent. + * It jumps to the BSP which is responsible for performing + * all initialization. + * + * COPYRIGHT (c) 1989-1998. + * On-Line Applications Research Corporation (OAR). + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +#include <rtems/asm.h> + +.extern _StackInit + +BEGIN_CODE + + PUBLIC (_INTERRUPT_VECTOR) +SYM(_INTERRUPT_VECTOR): + + .long _StackInit /* 00 Initial 'SSP' */ + .long SYM(start) /* 01 Initial PC */ + .long SYM(_uhoh) /* 02 Access Error */ + .long SYM(_uhoh) /* 03 Address Error */ + .long SYM(_uhoh) /* 04 Illegal Instruction */ + .long SYM(_uhoh) /* 05 Divide by Zero */ + .long SYM(_uhoh) /* 06 Reserved */ + .long SYM(_uhoh) /* 07 Reserved */ + .long SYM(_uhoh) /* 08 Privilege Violation */ + .long SYM(_uhoh) /* 09 Trace */ + .long SYM(_uhoh) /* 10 Unimplemented A-Line */ + .long SYM(_uhoh) /* 11 Unimplemented F-Line */ + .long SYM(_uhoh) /* 12 Debug Interrupt */ + .long SYM(_uhoh) /* 13 Reserved */ + .long SYM(_uhoh) /* 14 Format Error */ + .long SYM(_uhoh) /* 15 Reserved */ + .long SYM(_uhoh) /* 16 Reserved */ + .long SYM(_uhoh) /* 17 Reserved */ + .long SYM(_uhoh) /* 18 Reserved */ + .long SYM(_uhoh) /* 19 Reserved */ + .long SYM(_uhoh) /* 20 Reserved */ + .long SYM(_uhoh) /* 21 Reserved */ + .long SYM(_uhoh) /* 22 Reserved */ + .long SYM(_uhoh) /* 23 Reserved */ + .long SYM(_spuriousInterrupt) /* 24 Spurious Interrupt */ + .long SYM(_uhoh) /* Reserved */ + .long SYM(_uhoh) /* Reserved */ + .long SYM(_uhoh) /* Reserved */ + .long SYM(_uhoh) /* Reserved */ + .long SYM(_uhoh) /* Reserved */ + .long SYM(_uhoh) /* Reserved */ + .long SYM(_uhoh) /* Reserved */ + .long SYM(_uhoh) /* 32 TRAP #0 */ + .long SYM(_uhoh) /* 33 TRAP #1 */ + .long SYM(_uhoh) /* 34 TRAP #2 */ + .long SYM(_uhoh) /* 35 TRAP #3 */ + .long SYM(_uhoh) /* 36 TRAP #4 */ + .long SYM(_uhoh) /* 37 TRAP #5 */ + .long SYM(_uhoh) /* 38 TRAP #6 */ + .long SYM(_uhoh) /* 39 TRAP #7 */ + .long SYM(_uhoh) /* 40 TRAP #8 */ + .long SYM(_uhoh) /* 41 TRAP #9 */ + .long SYM(_uhoh) /* 42 TRAP #10 */ + .long SYM(_uhoh) /* 43 TRAP #11 */ + .long SYM(_uhoh) /* 44 TRAP #12 */ + .long SYM(_uhoh) /* 45 TRAP #13 */ + .long SYM(_uhoh) /* 46 TRAP #14 */ + .long SYM(_uhoh) /* 47 TRAP #15 */ + .long SYM(_uhoh) /* 48 Reserved */ + .long SYM(_uhoh) /* 49 Reserved */ + .long SYM(_uhoh) /* 50 Reserved */ + .long SYM(_uhoh) /* 51 Reserved */ + .long SYM(_uhoh) /* 52 Reserved */ + .long SYM(_uhoh) /* 53 Reserved */ + .long SYM(_uhoh) /* 54 Reserved */ + .long SYM(_uhoh) /* 55 Reserved */ + .long SYM(_uhoh) /* 56 Reserved */ + .long SYM(_uhoh) /* 57 Reserved */ + .long SYM(_uhoh) /* 58 Reserved */ + .long SYM(_uhoh) /* 59 Reserved */ + .long SYM(_uhoh) /* 60 Reserved */ + .long SYM(_uhoh) /* 61 Reserved */ + .long SYM(_uhoh) /* 62 Reserved */ + .long SYM(_uhoh) /* 63 Reserved */ + + /* INTC0 */ + + .long SYM(_uhoh) /* 64*/ + .long SYM(_uhoh) /* 65*/ + .long SYM(_uhoh) /* 66*/ + .long SYM(_uhoh) /* 67*/ + .long SYM(_uhoh) /* 68*/ + .long SYM(_uhoh) /* 69*/ + .long SYM(_uhoh) /* 70*/ + .long SYM(_uhoh) /* 71*/ + .long SYM(_uhoh) /* 72*/ + .long SYM(_uhoh) /* 73*/ + .long SYM(_uhoh) /* 74*/ + .long SYM(_uhoh) /* 75*/ + .long SYM(_uhoh) /* 76*/ + .long SYM(_uhoh) /* 77*/ + .long SYM(_uhoh) /* 78*/ + .long SYM(_uhoh) /* 79*/ + .long SYM(_uhoh) /* 80*/ + .long SYM(_uhoh) /* 81*/ + .long SYM(_uhoh) /* 82*/ + .long SYM(_uhoh) /* 83*/ + .long SYM(_uhoh) /* 84*/ + .long SYM(_uhoh) /* 85*/ + .long SYM(_uhoh) /* 86*/ + .long SYM(_uhoh) /* 87*/ + .long SYM(_uhoh) /* 88*/ + .long SYM(_uhoh) /* 89*/ + .long SYM(_uhoh) /* 90*/ + .long SYM(_uhoh) /* 91*/ + .long SYM(_uhoh) /* 92*/ + .long SYM(_uhoh) /* 93*/ + .long SYM(_uhoh) /* 94*/ + .long SYM(_uhoh) /* 95*/ + .long SYM(_uhoh) /* 96*/ + .long SYM(_uhoh) /* 97*/ + .long SYM(_uhoh) /* 98*/ + .long SYM(_uhoh) /* 99*/ + .long SYM(_uhoh) /* 100*/ + .long SYM(_uhoh) /* 101*/ + .long SYM(_uhoh) /* 102*/ + .long SYM(_uhoh) /* 103*/ + .long SYM(_uhoh) /* 104*/ + .long SYM(_uhoh) /* 105*/ + .long SYM(_uhoh) /* 106*/ + .long SYM(_uhoh) /* 107*/ + .long SYM(_uhoh) /* 108*/ + .long SYM(_uhoh) /* 109*/ + .long SYM(_uhoh) /* 110*/ + .long SYM(_uhoh) /* 111*/ + .long SYM(_uhoh) /* 112*/ + .long SYM(_uhoh) /* 113*/ + .long SYM(_uhoh) /* 114*/ + .long SYM(_uhoh) /* 115*/ + .long SYM(_uhoh) /* 116*/ + .long SYM(_uhoh) /* 117*/ + .long SYM(_uhoh) /* 118*/ + .long SYM(_uhoh) /* 119*/ + .long SYM(_uhoh) /* 120*/ + .long SYM(_uhoh) /* 121*/ + .long SYM(_uhoh) /* 122*/ + .long SYM(_uhoh) /* 123*/ + .long SYM(_uhoh) /* 124*/ + .long SYM(_uhoh) /* 125*/ + .long SYM(_uhoh) /* 126*/ + .long SYM(_uhoh) /* 127*/ + + /* INTC1 */ + + .long SYM(_uhoh) /* 128*/ + .long SYM(_uhoh) /* 129*/ + .long SYM(_uhoh) /* 130*/ + .long SYM(_uhoh) /* 131*/ + .long SYM(_uhoh) /* 132*/ + .long SYM(_uhoh) /* 133*/ + .long SYM(_uhoh) /* 134*/ + .long SYM(_uhoh) /* 135*/ + .long SYM(_uhoh) /* 136*/ + .long SYM(_uhoh) /* 137*/ + .long SYM(_uhoh) /* 138*/ + .long SYM(_uhoh) /* 139*/ + .long SYM(_uhoh) /* 140*/ + .long SYM(_uhoh) /* 141*/ + .long SYM(_uhoh) /* 142*/ + .long SYM(_uhoh) /* 143*/ + .long SYM(_uhoh) /* 144*/ + .long SYM(_uhoh) /* 145*/ + .long SYM(_uhoh) /* 146*/ + .long SYM(_uhoh) /* 147*/ + .long SYM(_uhoh) /* 148*/ + .long SYM(_uhoh) /* 149*/ + .long SYM(_uhoh) /* 150*/ + .long SYM(_uhoh) /* 151*/ + .long SYM(_uhoh) /* 152*/ + .long SYM(_uhoh) /* 153*/ + .long SYM(_uhoh) /* 154*/ + .long SYM(_uhoh) /* 155*/ + .long SYM(_uhoh) /* 156*/ + .long SYM(_uhoh) /* 157*/ + .long SYM(_uhoh) /* 158*/ + .long SYM(_uhoh) /* 159*/ + .long SYM(_uhoh) /* 160*/ + .long SYM(_uhoh) /* 161*/ + .long SYM(_uhoh) /* 162*/ + .long SYM(_uhoh) /* 163*/ + .long SYM(_uhoh) /* 164*/ + .long SYM(_uhoh) /* 165*/ + .long SYM(_uhoh) /* 166*/ + .long SYM(_uhoh) /* 167*/ + .long SYM(_uhoh) /* 168*/ + .long SYM(_uhoh) /* 169*/ + .long SYM(_uhoh) /* 170*/ + .long SYM(_uhoh) /* 171*/ + .long SYM(_uhoh) /* 172*/ + .long SYM(_uhoh) /* 173*/ + .long SYM(_uhoh) /* 174*/ + .long SYM(_uhoh) /* 175*/ + .long SYM(_uhoh) /* 176*/ + .long SYM(_uhoh) /* 177*/ + .long SYM(_uhoh) /* 178*/ + .long SYM(_uhoh) /* 179*/ + .long SYM(_uhoh) /* 180*/ + .long SYM(_uhoh) /* 181*/ + .long SYM(_uhoh) /* 182*/ + .long SYM(_uhoh) /* 183*/ + .long SYM(_uhoh) /* 184*/ + .long SYM(_uhoh) /* 185*/ + .long SYM(_uhoh) /* 186*/ + .long SYM(_uhoh) /* 187*/ + .long SYM(_uhoh) /* 188*/ + .long SYM(_uhoh) /* 189*/ + .long SYM(_uhoh) /* 190*/ + .long SYM(_uhoh) /* 191*/ + .long SYM(_uhoh) /* 192*/ + + /* */ + + .long SYM(_uhoh) /* 193*/ + .long SYM(_uhoh) /* 194*/ + .long SYM(_uhoh) /* 195*/ + .long SYM(_uhoh) /* 196*/ + .long SYM(_uhoh) /* 197*/ + .long SYM(_uhoh) /* 198*/ + .long SYM(_uhoh) /* 199*/ + .long SYM(_uhoh) /* 200*/ + .long SYM(_uhoh) /* 201*/ + .long SYM(_uhoh) /* 202*/ + .long SYM(_uhoh) /* 203*/ + .long SYM(_uhoh) /* 204*/ + .long SYM(_uhoh) /* 205*/ + .long SYM(_uhoh) /* 206*/ + .long SYM(_uhoh) /* 207*/ + .long SYM(_uhoh) /* 208*/ + .long SYM(_uhoh) /* 209*/ + .long SYM(_uhoh) /* 210*/ + .long SYM(_uhoh) /* 211*/ + .long SYM(_uhoh) /* 212*/ + .long SYM(_uhoh) /* 213*/ + .long SYM(_uhoh) /* 214*/ + .long SYM(_uhoh) /* 215*/ + .long SYM(_uhoh) /* 216*/ + .long SYM(_uhoh) /* 217*/ + .long SYM(_uhoh) /* 218*/ + .long SYM(_uhoh) /* 219*/ + .long SYM(_uhoh) /* 220*/ + .long SYM(_uhoh) /* 221*/ + .long SYM(_uhoh) /* 222*/ + .long SYM(_uhoh) /* 223*/ + .long SYM(_uhoh) /* 224*/ + .long SYM(_uhoh) /* 225*/ + .long SYM(_uhoh) /* 226*/ + .long SYM(_uhoh) /* 227*/ + .long SYM(_uhoh) /* 228*/ + .long SYM(_uhoh) /* 229*/ + .long SYM(_uhoh) /* 230*/ + .long SYM(_uhoh) /* 231*/ + .long SYM(_uhoh) /* 232*/ + .long SYM(_uhoh) /* 233*/ + .long SYM(_uhoh) /* 234*/ + .long SYM(_uhoh) /* 235*/ + .long SYM(_uhoh) /* 236*/ + .long SYM(_uhoh) /* 237*/ + .long SYM(_uhoh) /* 238*/ + .long SYM(_uhoh) /* 239*/ + .long SYM(_uhoh) /* 240*/ + .long SYM(_uhoh) /* 241*/ + .long SYM(_uhoh) /* 242*/ + .long SYM(_uhoh) /* 243*/ + .long SYM(_uhoh) /* 244*/ + .long SYM(_uhoh) /* 245*/ + .long SYM(_uhoh) /* 246*/ + .long SYM(_uhoh) /* 247*/ + .long SYM(_uhoh) /* 248*/ + .long SYM(_uhoh) /* 249*/ + .long SYM(_uhoh) /* 250*/ + .long SYM(_uhoh) /* 251*/ + .long SYM(_uhoh) /* 252*/ + .long SYM(_uhoh) /* 253*/ + .long SYM(_uhoh) /* 254*/ + .long SYM(_uhoh) /* 255*/ + +/* + * Default trap handler + * With an oscilloscope you can see AS* stop + */ +.align 4 + PUBLIC (_uhoh) +SYM(_uhoh): + nop | Leave spot for breakpoint + stop #0x2700 | Stop with interrupts disabled + bra.w SYM(_uhoh) | Stuck forever + +/* + * Spurious Interrupt Handler + */ +.align 4 + PUBLIC (_spuriousInterrupt) +SYM(_spuriousInterrupt): + addql #1, SYM(_M68kSpuriousInterruptCount) + rte + +/* + * Write VBR Register + */ +.align 4 + PUBLIC (_wr_vbr) +SYM(_wr_vbr): + move.l 4(sp), d0 + movec d0, vbr + nop + rts + +/* + * Board startup + * Disable watchdog, interrupts + * Enable sram + */ +.align 4 + PUBLIC (start) +SYM(start): + + /* Mask off interupts */ + move.w #0x2700,sr + + /* Save off reset values of D0 and D1 */ + move.l d0,d6 + move.l d1,d7 + + /* Initialize RAMBAR1: locate SRAM and validate it */ + move.l #_CoreSRamBase,d0 + add.l #0x221,d0 + movec d0,%rambar + + /* Save off intial D0 and D1 to RAM */ + move.l d6, SYM(_d0_reset) + move.l d7, SYM(_d1_reset) + + /* Locate Stack Pointer */ + move.l #_StackInit,sp + + /* + * Remainder of the startup code is handled by C code + * This never returns + */ + jmp SYM(Init5329) + +END_CODE + + +BEGIN_DATA_DCL + + .align 4 + +PUBLIC (_M68kSpuriousInterruptCount) +SYM (_M68kSpuriousInterruptCount): + .long 0 + +PUBLIC (_d0_reset) +SYM (_d0_reset): + .long 0 + +PUBLIC (_d1_reset) +SYM (_d1_reset): + .long 0 + +END_DATA_DCL + +END + |